Abstract:
The influence of utilizing waste electronic plastic (e-plastic) and waste marble dust
(MD) on the mechanical and durability properties of high strength concrete (HSC)
were investigated. For this purpose, concrete mixtures with a water to cement ratio of
0.40 were prepared. Shredded e-plastic waste was utilized as a partial replacement of
natural aggregate at proportions of 0%, 10%, 20%, 30% and 40% by volume. In
addition, MD was used as an additive by weight of cement at the proportions ranging
from 0% to 15%. The unit weight, compressive, splitting tensile and flexural strength
values, modulus of elasticity, stress-strain relationship under compression, load deflection relation under flexure, toughness and permeability of the mixtures were
determined. In addition, the impact of high temperatures (60ºC, 100ºC and 200ºC) on
compressive strength and unit weight were determined and the obtained data were
compared with the corresponding untreated specimens. Additionally, specimens were
exposed up to the temperature of 300ºC to observe the temperature effect on the
surface condition of concrete. Observed data indicated that the strength values,
elastic modulus and unit weight of the test mixtures were lower than those of the
control concrete. Furthermore, the least reduction in compressive strength, flexural
strength and toughness occurred at 20% e-plastic replacement level. The tensile
strengths, elastic modulus and unit weight were inversely proportional to the
increment in the e-plastic content. On the other hand, the change in temperature
resulted in the compressive strength loss up to 200ºC. Color changes were also
observed on the concrete surfaces at 300ºC. TGA analysis of e-plastic particles also
showed that weight losses became more pronounced at 300ºC compared to the
200ºC. Ultimately, the addition of MD slightly enhanced the properties and
performance of the concrete.
Description:
Doctor of Philosophy in Civil Engineering. Institute of Graduate Studies and Research. Thesis (Ph.D.) - Eastern Mediterranean University, Faculty of Engineering, Dept. of Civil Engineering, 2021. Co-Supervisor: Prof. Dr. Kambiz Ramyar and Supervisor: Assoc. Prof. Dr. Tülin Akçaoğlu.
