2024-03-28T18:20:11Zhttp://i-rep.emu.edu.tr:8080/oai/request
oai:i-rep.emu.edu.tr:11129/23782016-03-30T18:50:02Zhdl_11129_374SELIMIYE MOSQUE IN NICOSIAÇelik, TahirEren, ÖzgürSELIMIYE MOSQUENICOSIACONSTRUCTIONMATERIALSelimiye Mosque is a great Gothic building situated in Nicosia, Cyprus. It was built as a Cathedral in 13th century. It has a span of the nave vaults of 9m and two aisle vaults each of them of 7m. Ottoman Empire invaded Cyprus in 1570, and converted the Cathedral of Saint Sophia into a Mosque, called Selimiye, and two minarets were added. Because of poor materials and wrong methods of construction, the building was badly damaged by the help of earthquakes many times. However, it was repaired each time, and the building today is in safe conditions. The building is under special attention and had major restoration works after 1970, but still there are some more works to be done to preserve it.2016-03-30T18:50:02Z2016-03-30T18:50:02Z1993conferenceObjectÇelik T. and Eren, Ö. “Selimiye Mosque in Nicosia”, Proceedings, Public Assembly Structures From Antiquity to the Present, IASS-Symposium 1993, Istanbul, pp. 167-176, May 24-28, 1993.https://www.iass-structures.org/index.cfm/page/index.htmhttp://hdl.handle.net/11129/2378engIASS-Symposiuminfo:eu-repo/semantics/closedAccess
oai:i-rep.emu.edu.tr:11129/23792016-03-30T19:03:30Zhdl_11129_374PREDICTION OF COMPRESSIVE STRENGTH OF CONCRETE WITH MATURITY RELATIONSMohammed, HafedEren, ÖzgürMaturitycement contentstrength developmentcompressive strengthThis paper focuses on the effect of cement content on concrete maturity. The experiments were conducted under laboratory conditions on eight different concrete mixtures prepared from ordinary Portland cement (cement contents of 300, 350, 400, 450, 500, 550, 600 and 650 kg/m3) and crushed limestone aggregates. These concrete cubes were cured in water (22°C) and the temperature history was determined immediately after casting until specified ages. Compressive strength was determined at ages of 1, 3, 7, 28, 56, 90 and 120 days. In this study, the validity of the traditional maturity functions for different cement contents was tested and new relations were tried to be established. Test results revealed that Nurse-Saul maturity function and equivalent age maturity function were applicable.
At the end of this investigation, it was found that the new proposed equations are quite appropriate to strength prediction for concretes containing cement contents changing from 300 to 650 kg/m3 with slump values between 90 mm to 110 mm without any mineral or chemical admixtures.Lancaster, Pa. : DEStech Publications Inc.2016-03-30T19:03:30Z2016-03-30T19:03:30Z2007conferenceObjectMohammed, H.H. and Eren, Ö., “Prediction of Compressive Strength of Concrete with Maturity relations”, The First International Conference on Recent Advances in Concrete Technology, 19-21 September 2007, Washington DC, USA, pp. 471-478.9781932078763http://hdl.handle.net/11129/2379471478engProceedings of the First International Conference on Recent Advances in Concrete Technology : 19-21 September 2007, Washington, D.C., USA / editors, Amde M. Amde, Gajanan Sabnis, John S.Y. Taninfo:eu-repo/semantics/closedAccess
oai:i-rep.emu.edu.tr:11129/23812016-03-30T23:00:46Zhdl_11129_374İyi Beton NedirEren, ÖzgürBetonÇimento, çimento türleriİnşaat Mühendisliği17 AĞUSTOS 1999 MARMARA DEPREMİ’NİN 12.YIL’I ANISINA MESLEK İÇİ EĞİTİM SEMİNERİ, 17 Ağustos 2011, KTMMOB2016-03-30T19:16:19Z2016-03-30T19:16:19Z2011-08-17presentationÖzgür Eren, İyi Beton Nedir?, 17 AĞUSTOS 1999 MARMARA DEPREMİ’NİN 12.YIL’I ANISINA MESLEK İÇİ EĞİTİM SEMİNERİ, 17 Ağustos 2011, KTMMOB Konferans Salonu, Lefkoşa, KKTC.http://hdl.handle.net/11129/2381turinfo:eu-repo/semantics/openAccess
oai:i-rep.emu.edu.tr:11129/23852016-03-31T23:00:44Zhdl_11129_374Repairs to Teacher Training Academy RC Building in North Cyprus-Case StudyBilsel, HuriyeÇelikağ, MürüdeEren, ÖzgürŞensoy, Serhanstructural cracksconcrete qualityunconsolidated fillslope stabilitydifferential settlementThe case study examined is a controversial one, which brought up the discussion of the necessity of subsurface explorations, better site inspection and improved quality of construction technology. The Teachers Training Academy was examined in all aspects, and in contrary to the speculations of poor concrete quality and inadequate reinforcement, numerous cracks formed on the beams and the walls were due to the existing subsurface conditions, the chosen foundation system and inadequacy in the drainage.2016-03-31T19:06:03Z2016-03-31T19:06:03Z2012conferenceObjecthttp://hdl.handle.net/11129/2385eng7th International Conference on Inspection, Appraisal, Repairs and Maintenance of Buildings and Structuresinfo:eu-repo/semantics/openAccess
oai:i-rep.emu.edu.tr:11129/23922016-04-01T18:46:46Zhdl_11129_374EFFECT OF LIMESTONE CRUSHER DUST CONTENT ON SOME PROPERTIES OF STEEL FIBER REINFORCED CONCRETEEren, ÖzgürYılmaz, ZekaLimestone crusher dustFiber reinforced concreteShrinkageLimestone crusher dust is used as filler material for cement or concrete depending on the chemical composition. This dust is composed of particles which pass 75 mm BS sieve.
The influence of limestone crusher dust content in aggregate on the properties of steel fiber reinforced concrete (SFRC) is not known very well yet.
In order to analyze the change in the properties of SFRC, some laboratory tests have been undertaken. During these studies, crusher dust partially replaced the aggregates at percentages of 0, 10, 15, 20 by weight and three different types of hooked-end steel fibers having aspect ratios of 65, 80, and 100 and three different volume percentages of steel fibers as 0.5, 1.0, and 1.5% were used.
Tests of VeBe consistometer, air content, wet density, linear shrinkage, compressive strength, Ultrasonic pulse velocity and Schmidth hammer have been conducted.
The addition of crusher dust to fresh SFRC increased the VeBe time and wet density; however, it reduced the air content. Improvement in compressive strength and reduction in linear shrinkage with the addition of fibers is also noted.
Replacement of dust with fine aggregate reduced the workability and air content but increased the wet density. Optimum dust content was found to be 10% for the compressive strength. Linear shrinkage remained almost the same up to 15% dust replacement but beyond that limit it tended to increase.2016-04-01T18:46:46Z2016-04-01T18:46:46Z2009-10conferenceObjecthttp://hdl.handle.net/11129/2392eng7th International Conference on Concrete Technology in Developing Countriesinfo:eu-repo/semantics/closedAccess
oai:i-rep.emu.edu.tr:11129/23932016-04-01T18:53:33Zhdl_11129_374SOME PROPERTIES OF SELF COMPACTING FIBER REINFORCED CONCRETEAlyousif, AhmedEren, ÖzgürFlow testJ-ringT50V-funnelL-boxToday many countries are producing self-compacting concrete (SCC) and it is known that SCC has many advantages compared to conventional concrete. On the other hand, it is very well known that tensile strength of concrete can be improved by adding steel fibers in concrete. Although fiber reinforced concrete (FRC) is being produced in Cyprus for a long time, SCC is a new product for construction industry. Therefore, combination of SCC & FRC would bring many benefits. This study was split into 3 parts. First part was based on the design of FRC with two different steel fiber contents by volume of concrete (namely, 0.5% and 1.0%) and three different steel fiber aspect ratios (namely, 60, 65, and 80). Second part was based on designing SCC with locally available materials of Cyprus in addition to chemical additives. The third part was based on combination of SCC and FRC with optimum proportions. Produced self-compacting fiber reinforced concrete (SCFRC) was tested for fresh mix properties such as flow spread, T50, L-box, V-funnel, and hardened properties such as compressive strength, splitting tensile strength, pundit, and concrete hammer. The results have shown that the addition of fibers increases the compressive strength and tensile strength. It is observed that aspect ratio of 80 and 65 gives better results in increasing compressive and tensile strength compared to aspect ratio of 60. It has also been found that better workability can be obtained for SCFRC by increasing w/c ratio and usage of admixture.2016-04-01T18:53:33Z2016-04-01T18:53:33Z2010-11conferenceObjectAlyousif, A., and Eren, Ö. “Some Properties of Self Compacting Fiber Reinforced Concrete”, 6th ARCHENG-2010 International Architecture and Engineering Symposium, European University of Lefke, 25-26 November 2010, pp.1-4.http://hdl.handle.net/11129/2393eng6th ARCHENG-2010 International Architecture and Engineering Symposiuminfo:eu-repo/semantics/closedAccess
oai:i-rep.emu.edu.tr:11129/23942016-04-01T18:57:41Zhdl_11129_374Natural Building Cut Stones of North Cyprus: Meluşa and Karpaz StonesEren, ÖzgürMarar, KhaledÇelik, TahirBuilding stonesmasonryporosityfire resistance-Natural building cut stones are being used for ages all over the World to build masonry structures. Although these cut stones are low cost construction materials, they are not widely used in these days.
This study was done in order to bring more technical information about these stones for Engineers in Cyprus. Two quarries were selected and samples obtained were tested for some physical and mechanical properties.
From the results obtained it can be said that Meluşa stone behaved better than Karpaz stone. A regression analysis provided a polynomial relation between compressive strength and burning temperature.2016-04-01T18:57:41Z2016-04-01T18:57:41Z2006-12conferenceObjectEren, Ö., Marar K., Çelik, T. “Natural Building Cut Stones of Cyprus: Meluşa & Karpaz Stones”, 4th FAE International Symposium, European University of Lefke, 30 Nov-01 Dec 2006, pp.167-170.http://hdl.handle.net/11129/2394eng4th FAE International Symposiuminfo:eu-repo/semantics/closedAccess
oai:i-rep.emu.edu.tr:11129/23802016-03-30T19:09:14Zhdl_11129_374Measuring Impact Resistance of High Strength Steel Fiber Reinforced ConcreteEren, ÖzgürMarar, KhaledÇelik, TahirFiber Reinforced Concrete (FRC)High StrengthImpact ResistanceImpact resistance is a requirement for many applications in civil engineering such as pavements, industrial floors, overlays, and slabs on grade. Although there are many test methods to measure the impact resistance of fiber reinforced concrete (FRC) most of them are complicated, time consuming, expensive and not applicable for high strength fiber reinforced concrete (HSFRC). A practical test method has been developed for HSFRC to measure its impact resistance. The equipment developed is also used for testing aggregate impact values by simply changing the base plate of the machine. In this study the influence of silica fume on the properties of HSFRC was investigated by using silica fume at two different percentages and three different hooked-end fibers namely, 30/.50, 60/.80 and 50/.60 length/diameter (mm/mm). Fibers were added to concrete in three different volume percentages of 0.5, 1.0 and 2.0 % by volume of concrete.2016-03-30T19:09:14Z2016-03-30T19:09:14Z2000-09conferenceObjectEren, Ö., Marar, K. and Çelik T., “Measuring Impact Resistance of High Strength Fiber Reinforced Concrete”, 2nd International Symposium Cement and Concrete Technology in the 2000s, vol 2, pp. 562-571, Istanbul, Türkiye, 6-10 September, 2000.http://hdl.handle.net/11129/23802562571eng2nd International Symposium Cement and Concrete Technologyinfo:eu-repo/semantics/openAccess
oai:i-rep.emu.edu.tr:11129/23862016-03-31T19:10:38Zhdl_11129_374POMZANIN KONUT İNŞAATINDA ÖNEMİÇelik, TahirEren, ÖzgürAltunay, CemalHatay, TolgaKılıç, Ogündeprem güvenliğiGünümüzde bina tasarımında gözönünde bulundurulan en önemli kriterlerden bazıları deprem güvenliği, bina maliyeti ve enerji tasarrufudur. Bundan dolayı bilim adamları sürekli bir arayış ve araştırma içerisindedirler.
Hafif yapı malzemeleri, genelde hafif-beton üretiminde kullanılmakta ve bu betonlar yapılardaki duvar bölmelerinde, asma tavanlarda ve benzeri birçok elemanda başarı ile uygulanabilmektedirler. Volkanik bir kayaç olan pomza taşından elde edilen agerga da hafif bir malzemedir ve özellikle duvar yapımında kullanılan blokların üretiminde tercih edilebilmektedir. Pomza taşına Almanca’dan dilimize girmiş olan `bims` adı da verilmektedir.
Pomza normal ağırlıktaki kumun ve çakılın yaklaşık olarak 1/3-2/3’ü kadar yoğunluğa sahiptir. Aynı durum pomza ile yapılan betonlarda da görülür. İnşaatlarda pomza agregası ile yapılan betonun birim hacim ağırlığı 250-1500 kg/m3 olup, normal betondan hafif olması nedeni ile imalatta zaman ve işçilikten tasarruf sağlandığı da bilinmektedir. Ayrıca bina taşıyıcı elemanlarına gelecek sabit yük azalacağından dolayı, kesit boyutlarındaki azalma, beton ve çeliğinden tasarruf edilebilmesini sağlar. Bunun yanında, ısı ve ses yalıtımındaki yüksek performans, hacimlerin ısıtılması ve soğutulması için harcanacak enerji mikarından da önemli tasarruf sağlamaktadır.
Bu tebliğde pomza ve gri renkli kireçtaşı tozu kullanılarak laboratuvar ortamında üretilen hafif betonların (birim hacim ağırlığı 800-900 kg/m3) basınç dayanımı, rötre, akma zamanı, su emme kapasitesi, taze ve kuru birim hacim ağırlığı gibi özellikleri hakkındaki deneyler ve nericeleri anlatılacaktır.2016-03-31T19:10:38Z2016-03-31T19:10:38Z2006-03conferenceObjecthttp://hdl.handle.net/11129/2386turKTMMOBinfo:eu-repo/semantics/closedAccess
oai:i-rep.emu.edu.tr:11129/23952016-04-01T19:02:46Zhdl_11129_374A REVIEW ON THE UTILIZATION OF BY-PRODUCTS OF BIOMASS ENERGY PRODUCTION AS CEMENT REPLACEMENT MATERIAL IN CONCRETEOnuaguluchi, ObinnaEren, ÖzgürEnergybiomass fly ashenvironmentwastecementBiomass energy production is considered an environmentally friendly way of
providing energy because of its CO2 neutrality. Unfortunately, the disposal of
particulate residue from biomass combustion has thrown up a significant
environmental conservation problem. Furthermore, the increasing cost of landfill
disposal engendered by the stringent environmental guidelines being imposed by
regulatory agencies across the world makes it imperative that cheap and effective
alternative ways of utilizing this waste material be developed. Utilization of this
waste as a cement replacement material in concrete production provides many
advantages; the use of a zero-cost raw material, the elimination of waste and
especially, the reduction in cement usage in concrete will result in a decrease in
energy consumption and CO2 emission at cement production plants. Therefore,
this paper discussed biomass fly ash as a potential cement replacement material in
concrete, presenting an overview of the various ways by which it could be
beneficiated for utilization in concrete. Furthermore, some outstanding issues that
require further research in order to make successful use and application of this fly
ash as a cement replacement material feasible were also highlighted.2016-04-01T19:02:46Z2016-04-01T19:02:46Z2010-09conferenceObjectOnuaguluchi, O. and Eren, Ö., “A Review on the Utilization of By-Products of Biomass Energy Production as Cement Replacement Material in Concrete”, ICCE-2010 10th International Conference on Clean Energy, ref 8-10, Famagusta, North Cyprus, September 2010.http://hdl.handle.net/11129/2395engICCE-2010 10th International Conference on Clean Energinfo:eu-repo/semantics/closedAccess
oai:i-rep.emu.edu.tr:11129/23972016-04-01T19:15:13Zhdl_11129_374Some Properties of Fiber Reinforced Self Compacting ConcreteEren, ÖzgürAlyousif, Ashraffiber reinforced concreteSelf Compacting ConcreteToday many countries are producing self-compacting concrete (SCC) and it is known that SCC has many advantages compared to conventional concrete. On the other hand, it is very well known that tensile strength of concrete can be improved by adding steel fibers in concrete. Although fiber reinforced concrete (FRC) is being produced in Cyprus for a long time, SCC is a new product for construction industry. Therefore, combination of SCC & FRC would bring many benefits.
This study was split into 3 parts. First part was based on the design of FRC with two different steel fiber contents by volume of concrete (namely, 0.5% and 1.0%) and three different steel fiber aspect ratios (namely, 60, 65, and 80). Second part was based on designing SCC with locally available materials of Cyprus in addition to chemical additives. The third part was based on combination of SCC and FRC with optimum proportions. Produced self-compacting fiber reinforced concrete (SCFRC) was tested for fresh mix properties such as flow spread, T50, L-box, V-funnel, and hardened properties such as compressive strength, splitting tensile strength, pundit, and concrete hammer. The results have shown that the addition of fibers increases the compressive strength and tensile strength. It is observed that aspect ratio of 80 and 65 gives better results in increasing compressive and tensile strength compared to aspect ratio of 60.2016-04-01T19:15:13Z2016-04-01T19:15:13Z2010-09conferenceObjectEren, Ö., Alyousif, A. “Some Properties of Fiber Reinforced Self Compacting Concrete”, 9th International Congress on Advances in Civil Engineering, 27-30 September 2010, Karadeniz Technical University, Trabzon, Turkey.http://hdl.handle.net/11129/2397eng9th International Congress on Advances in Civil Engineeringinfo:eu-repo/semantics/closedAccess
oai:i-rep.emu.edu.tr:11129/23962016-04-01T19:11:47Zhdl_11129_374PLASTIC SHRINKAGE CRACKING OF FIBER REINFORCED CONCRETEEren, ÖzgürAbdalkader, AshrafFiber reinforced concretePlastic shrinkage crackingsteel fibersSuperplasticizerCompressive strengthSplitting tensileVeBe timeThe main objective of this study was to investigate the effect of fiber volume (i.e
control, 0.5%, 1.0%, and 1.5%) and aspect ratios of 55, 65, and 80 of hooked-end steel fibers on the
behaviour of plastic shrinkage cracking during the first few hours after mixing. Properties such as
compressive strength, splitting tensile strength, VeBe time and wet density were investigated. During
this research two different strength levels (56 and 73 MPa at 28 days) were studied. The following
relations are obtained (a) Plastic shrinkage versus fiber volume, (b) Plastic shrinkage versus fiber
aspect ratio, (c) Plastic shrinkage versus strength level. The results indicated that the total plastic
shrinkage crack area and maximum plastic shrinkage crack width are significantly reduced with the
addition of steel fibers. Fiber content of 1.5% with aspect ratio of 80 resulted in a 74% and 70%
reduction in total crack area and maximum crack width, respectively compared to plain concrete
without fiber.2016-04-01T19:11:47Z2016-04-01T19:11:47Z2006conferenceObjectEren, Ö. and Abdalkader, A.H.M., “Plastic Shrinkage Cracking of Fiber Reinforced Concrete”, The Tenth East Asia-Pacific Conference on Structural Engineering and Construction, Bangkok, Thailand , pp.473-480, August 03-05, 2006.http://hdl.handle.net/11129/2396engThe Tenth East Asia-Pacific Conference on Structural Engineering and Constructioninfo:eu-repo/semantics/closedAccess
oai:i-rep.emu.edu.tr:11129/23982016-04-01T19:19:35Zhdl_11129_374Some Engineering Properties of Natural Building Cut Stones of CyprusEren, ÖzgürBahali, MustafaCut StonesBuildingEngineering PropertiesNatural building cut stones are being used in Cyprus for ages to build masonry structures. Almost all of the historical buildings in Cyprus are made of these natural cut stones. Although these cut stones are low cost construction materials, they are not widely used in these days. This is due to lack of knowledge causing incorrect construction methods and highly skilled labour requirement in constructing the walls.
This study is done in order to bring more technical information about these stones for Engineers in Cyprus. Therefore, two quarries are selected and samples obtained were tested for some physical and mechanical properties. Traditional names of these natural cut stones are Meluşa Stone and Karpaz Stone.
The physical properties such as bulk density, water absorption, specific gravity, apparent porosity, and voids ratio were measured.
The mechanical properties such as compressive strength, flexural strength, direct tensile strength, splitting tensile strength and fire resistance were measured.
From the results obtained it can be said that Meluşa stone behaved better than Karpaz stone. A regression analysis provided a polynomial relation between compressive strength and burning temperature.2016-04-01T19:19:35Z2016-04-01T19:19:35Z2010-10conferenceObjecthttp://hdl.handle.net/11129/2398eng6 the International Congress on Advances in Civil Engineeringinfo:eu-repo/semantics/closedAccess
oai:i-rep.emu.edu.tr:11129/23992016-04-01T19:23:20Zhdl_11129_374Mechanical Properties of Concrete through Fiber hybridizationMoghimi, GolnarEren, ÖzgürFibersHybrid fiber reinforced concreteCompressive strengthFlexural toughness energy and Impact energyHistorically, reinforcement of concrete with a single type of fiber has so far been successfully used and potentially affects the overall performance of concrete. However, there is still room to improve knowledge on the use of different type of fibers or proper combination leading to modified mechanical properties of concrete. This research investigated the modified characteristics on the mechanical properties of hybrid fiber reinforced concrete (HyFRC) which incorporated different percentages of steel fiber, polypropylene fiber and steel-polypropylene combination. The properties measured include compressive strength, flexural strength, toughness energy and impact energy. The results show that the hybrid forms of fiber has superior performance compared to a single type fiber reinforced concrete.ACE20142016-04-01T19:23:20Z2016-04-01T19:23:20Z2014-09conferenceObjecthttp://hdl.handle.net/11129/2399enginfo:eu-repo/semantics/closedAccess
oai:i-rep.emu.edu.tr:11129/24002016-04-01T19:24:55Zhdl_11129_374ESTIMATING COMPRESSIVE STRENGHT OF STEEL FIBER REINFORCED CONCRERTE BY MATURITY METHODKamkar, SaeidEren, ÖzgürMaturity MethodSteel Fiber Reinforced Concrete and Compressive StrengthThis paper presents estimation of compressive strength of hooked-end steel fiber reinforced concrete by maturity method. Three different curing temperatures (12˚, 22˚and 32˚C) were utilized for this study. The compressive strength of these concretes were estimated for four different volume fraction of fiber (0.5%, 1%, 1. 5% and 2% by volume of concrete).The compressive strength test were done for all samples at the ages of 1, 3, 7 , 14 and 28 days. Temperature-time factor were calculated for all specimens. The results show that concrete with 1.5 percent fiber has the highest temperature-time factor and compressive strength among all curing temperatures. Results show that temperature-time factor increases by increasing the volume fraction of fiber up to 1.5%.2016-04-01T19:24:55Z2016-04-01T19:24:55Z2014-09conferenceObjectKamkar S, Eren Ö, “Estimating compressive strength of steel fiber reinforced concrete by maturity method”, ACE2014, 11th International Congress on Advances in Civil Engineering, 21-25 October 2014, Istanbul, Turkey, ITU Süleyman Demirel Cultural Center, Paper No. 1002.http://hdl.handle.net/11129/2400engACE2014info:eu-repo/semantics/closedAccess
oai:i-rep.emu.edu.tr:11129/24012016-04-01T19:26:38Zhdl_11129_374Production of Self Compacting Fiber Reinforced Concrete in North CyprusEren, ÖzgürAlyousif, AhmedSelf CompactingFiber Reinforced Concrete (FRC)North CyprusToday many countries are producing self compacting concrete (SCC)
and it is known that SCC has many advantages compared to conventional concrete.
In order to improve tensile strength of concrete steel fibers can be added in
concrete. Although fiber reinforced concrete (FRC) is being produced in Cyprus
for a long time, SCC is a new product for construction industry. Therefore,
combination of SCC & FRC would bring many benefits.
This study was split into 3 parts. First part was based on the design of FRC 2
different fibers namely steel and polymer. Second part was based on designing
SCC with locally available materials of Cyprus in addition to chemical additives.
The third part was based on combination of SCC and FRC. Produced self
compacting fiber reinforced concrete (SCFRC) was tested for fresh mix properties
such as flow spread, T50, L-box, V-funnel, and hardened properties such as
compressive strength, splitting tensile strength and permeability. The results have
shown that the addition of fibers improve hardened properties. It has also been
found that better workability can be obtained for SCFRC by adjusting w/c ratio and
admixture.2016-04-01T19:26:38Z2016-04-01T19:26:38Z2010conferenceObjectEren, Ö. and Alyousif, A., “Production of Self Compacting Fiber Reinforced Concrete in North Cyprus”, SCC2010 Design Production and Placement of Self-Consolidating Concrete Conference, Ref.217, Montreal, Canada, September 2010.http://hdl.handle.net/11129/2401engSCC CANADA CONFERENCEinfo:eu-repo/semantics/closedAccess
oai:i-rep.emu.edu.tr:11129/24022016-04-01T19:29:05Zhdl_11129_374Properties of Mortar Containing Waste Glass and Limestone FillerKaramanoğlu, BEren, ÖzgürWaste glasslimestone fillerflow tableporositydrying shrinkageThe building material industry has been developed due to the increasing
population. This brings chronic shortage of building materials. According to this
the civil engineers have been challenged to convert the industrial wastes to useful
building and construction materials.
The purpose of using ground waste glass is protect the environment by saving
more landfills, to increase the cement plant capacity by using more beneficial
additives, and to reduce CO2 emission per ton of cement by consuming less
cement.
This research was focused on the production of mortars containing various
proportions of waste glass and limestone filler. Waste glass and limestone filler
was replaced with cement by weight. Produced mortars were tested against fresh
and hardened properties on specified ages.
At the end of experimental study, a statistical analysis of unit weight, flow table,
compressive strength, flexural strength, porosity, absorption and drying shrinkage
test results are given. Different relations were found between the replacement of
cement with waste glass and replacement of cement with limestone filler.
The results indicate that, finer particle size and certain proportion of waste glass
and limestone filler could behave satisfactory compared to the plain mortar.2016-04-01T19:29:05Z2016-04-01T19:29:05Z2008-09conferenceObjectKaramanoğlu, B. and Eren, Ö., “Properties of Mortar Containing Waste Glass & Limestone Filler”, 8th International Congress on Advances in Civil Engineering, 15-17 September 2008, Gazimağusa, North Cyprus, pp. 171-180.http://hdl.handle.net/11129/2402eng8th International Congress on Advances in Civil Engineeringinfo:eu-repo/semantics/closedAccess
oai:i-rep.emu.edu.tr:11129/26092016-05-07T23:00:38Zhdl_11129_374International strategic alliances in construction: performances of Turkish contracting firmsAkıner, İlknurYitmen, Ibrahimstrategic alliancesTurkish contracting firmssucces factorsinternational constructionFirms need various resources and capabilities in order to compete with each other effectively. These resources and capabilities can be acquired, developed internally, or obtained via an ongoing cooperative relationship with another firm through the use of a strategic alliance. The use of strategic alliances in construction industry has increased sharply over the last decade and they are particularly effective in helping a firm maintain a superior competitive position in dynamic environments. Alliances reportedly improve the competitiveness of the construction firms by providing access to external resources, by providing synergies and by fostering rapid learning and change. The purpose of this research is to identify the success factors and key components of the development process of strategic alliances, and propose a process model of strategic alliances performances based on alliance conditions in international construction industry. The research involves a questionnaire survey conducted to the Turkish contracting firms operating internationally. Different types of projects constructed by Turkish contractors in Commonwealth of Independent States, Middle East Countries, African Countries, and other regions of the world between 2002 and 2009, were analyzed and used in the developments made in this study. The results indicate that shared risk, trust between parties, and equity are found to be the most important determinants of strategic alliance success. The research findings support the contracting firms enhancing their productive capacities and acquiring competitive advantages that enable them to increase alliance performances. The study also commences on how the identified factors enhance the effectiveness of the participating firms’ competitive strategies by providing for mutual resource exchanges (technologies, skills, or products).CIB, Working Commissions W55,W65,W89, W112; ENHR and AESP2016-05-07T15:35:53Z2016-05-07T15:35:53Z2011-06-21conferenceObject9789052693958http://hdl.handle.net/11129/2609engManagement and Innovation for a Sustainable Built Environment MISBE 2011info:eu-repo/semantics/openAccess
oai:i-rep.emu.edu.tr:11129/26132016-05-07T16:24:29Zhdl_11129_374An Expert System For Quantifying The Impact Of Change Orders On Project PerformanceYitmen, İbrahimSevay, HüseyinTaneri, CemYalçıner, HakanExpert systemschange ordersproject performanceconstruction industryNorth CyprusChanges at different phases of a construction project are inevitable due to a multitude of
reasons such as design changes, design errors, additions to scope, or unknown conditions that
may arise due to resource limitations and the uniqueness of the project. For each change,
contractors are entitled to an equitable adjustment to the base contract price and schedule. It
is commonly accepted that change orders can have adverse effects on project performance,
but these effects are difficult to quantify and manage, and they frequently lead to disputes.
Most work in change order management focuses on labor productivity and does not pay as
much attention to the quantification and management of the impact of change orders in
regard to overall project performance in terms of time and cost. This paper describes a
prototype expert system named QUICOPP that implements these ideas. The knowledge used
in the system was acquired through a questionnaire survey administered to the contractors in
North Cyprus construction industry. A list of factors that describe the adverse effects of
change orders on project performance have been identified based on the survey, and this list
of factors was used to develop a quantitative model of how different change orders affect the
time and cost of a project. Our system provides a cost-effective means for handling change
orders through all phases of a project such that construction operations can continue with the
least amount of interruption that usually results from of disputes between different parties
involved in a project.2016-05-07T16:24:29Z2016-05-07T16:24:29Z2006-06-16conferenceObjecthttp://hdl.handle.net/11129/2613engJoint International Conference on Computing and Decision Making in Civil and Building Engineeringinfo:eu-repo/semantics/openAccess
oai:i-rep.emu.edu.tr:11129/26212016-05-08T23:00:36Zhdl_11129_374The Role of Strategic Leadership in Creating Change for Construction Innovation: A North Cyprus PerspectiveYitman, İbrahimTaneri, CemLeadershipchange initiativesinnovationconstruction contractorsconstruction industryNorth CyprusDriving forces in construction industry indicate that the ability to innovate is quickly becoming a
competitive necessity. However construction industry has been generally slow to embrace
innovation and radical changes as fundamental changes in construction processes require shifts
in the conservative management perspectives of construction contractors. Thus the strategic
leadership has a crucial role in change initiatives for innovation in construction contractors. Our
research focus is to investigate the role of strategic leadership in creating change for innovation
in North Cyprus construction industry. Main objectives are to 1) analyze the current strategic
role of leadership in change initiatives for innovation, 2) identify the innovation driving
leadership models, roles, and styles 3) assess the effectiveness of innovation leadership models,
roles, and styles in construction contractors. The research includes review of background
literature, interviews with project/construction managers in the industry on change initiatives for
innovation in construction processes, analysis of this information to develop findings and
extending these to present the key strategic issues that could be targeted for creating wider
awareness of existence and persistence of incumbent and prevailing innovation initiatives in the
management perspectives of construction contractors. The paper commences on understanding
the current management perspectives of construction industry leaders in change for innovation in
North Cyprus. The paper concludes how the changes in owners’ demands and more complex
new facilities require innovative change initiatives to leave the old paradigms in construction
organizations. Besides technology and project-oriented perspectives, social issues like
organizational change and strategic focus on clients (market oriented) can be regarded as the
most important change initiatives for the construction industry leaders in North Cyprus.2016-05-08T06:52:08Z2016-05-08T06:52:08Z2006conferenceObjecthttp://hdl.handle.net/11129/2621eng2ND Specialty Conference on Leadership and management in Constructioninfo:eu-repo/semantics/openAccess
oai:i-rep.emu.edu.tr:11129/25932016-05-07T23:00:32Zhdl_11129_374Factors Affecting the Learning Process of Professionals in Architectural Design FirmsBarlak, OzturkArditi, DGunaydin, H.M.Kale, S.Yitman, İbrahimLearning ProcessArchitecturalDesign FirmsLearning is considered to be a sophisticated process and a source of competitive advantage.
Learning is essential in project-based environments. The one-of-a-kind structure of the operations of architectural
design firms triggers special learning needs and requires a continuous learning activity. Learning is considered
to improve an architectural design firm’s efficiency by recognizing the role of individuals in enhancing
the firm’s objectives. However, theoretical research on individual professionals’ learning process in the
architectural design is rather uncommon. The process of individual learning is composed of (1) data acquisition
(2) assessment of the acquired information and (3) implementation of the knowledge gained in a group
setting. Ten factors were identified to assess the effectiveness of the learning processes of professionals.
This study is the first study in the field of architecture that presents a conceptual model about the factors that
affect the effectiveness of the learning process of professionals.2016-05-07T11:12:31Z2016-05-07T11:12:31Z2009conferenceObjecthttp://hdl.handle.net/11129/2593engInternational Conference on Construction Information Technologyinfo:eu-repo/semantics/openAccess
oai:i-rep.emu.edu.tr:11129/29812016-10-10T07:59:10Zhdl_11129_374Integration of building information modeling (bim) and laser scanning in construction industryAlizadehsalehi, SepehrKoseoglu, OzanÇelikağ, MürüdePoint cloudConstruction management,Laser scanner, Building information modeling (BIM)To raise the awareness and understanding about the building information modeling (BIM) and laser scanning tools and applications in construction industry, a questionnaire was administered to participants from different background and workplaces. The results indicate the participants’ positive perceptions of employing such tools in their workplace. This study also reports on a case study using BIM and laser scanning tools on Teknopark Building in North Cyprus. For this purpose, a CADeyes camera was used to capture the building’s 3D spatial and visual data, which were then analyzed using Revit to generate a 3D model. The outcomes revealed the efficient and effective use of these tools in the construction sector. The findings of this study, therefore, recommend designers and end-users to use these applications in order to meet the basic requirements of design and construction as well as to deal with the challenges such as errors, risks and costs of construction projects.Due to copyright restrictions, the access to the publisher version (published version) of this article is only available via subscription. You may click URI and have access to the Publisher Version of this article through the publisher web site or online databases, if your Library or institution has subscription to the related journal or publication.Elsevier2016-10-10T07:59:10Z2016-10-10T07:59:10Z2015conferenceObjecthttp://dx.doi.org/10.1061/9780784479070.015http://hdl.handle.net/11129/29812015163174eng10.1061/9780784479070.015AEI 2015: Birth and Life of the Integrated Building - Proceedings of the AEI Conference 2015info:eu-repo/semantics/closedAccess
oai:i-rep.emu.edu.tr:11129/29802016-10-10T07:58:07Zhdl_11129_374Building Construction in North Cyprus: Problems and Alternatives SolutionsÇelikağ, MürüdeNaimi, SaeidBuilding ConstructionReinforced Concrete Framed, Steel FramedSteel Framed, Maintenance, Repair, Reinforced concrete framedIn recent years the number of medium rise buildings is slowly increasing in North Cyprus. As a result, the need to use new construction materials and technologies is becoming more essential. Using hot rolled steel and cold rolled galvanized light gauge steel for building frames are two of the possible alternatives to reinforced concrete building frames currently used in the market. The number of steel framed buildings so far is less than five percent of all the buildings. Steel is an imported material. It is mainly used for the industrial buildings, either as truss roof system and/or complete portal frame and/or truss roof steel framed single storey structures. The engineers are not knowledgeable enough, the lack of training, inadequate fabrication facilities and many years of having used to reinforced concrete framed structures are the main reasons for engineers not using enough steel framed structures. The first part of this paper investigates the problems and possible solution of steel usage for structures in North Cyprus by analysing the number of buildings constructed after the year 2000. The second part summarizes the problems relating to the local reinforced concrete framed building construction, including inadequacies of repair, quality control, material quality and isolation of buildings from the external effects. Sustainability, stability and repair aspects for steel structures in comparison to reinforced concrete structures in North Cyprus are also briefly discussed in this paper.Due to copyright restrictions, the access to the publisher version (published version) of this article is only available via subscription. You may click URI and have access to the Publisher Version of this article through the publisher web site or online databases, if your Library or institution has subscription to the related journal or publication.Elsevier Ltd2016-10-10T07:58:07Z2016-10-10T07:58:07Z2011conferenceObject1877-7058http://dx.doi.org/10.1016/j.proeng.2011.07.286http://hdl.handle.net/11129/29801422692275eng10.1016/j.proeng.2011.07.286Procedia Engineeringinfo:eu-repo/semantics/closedAccess