The engineering properties of high volume fly ash cement paste

Abstract

This paper presents the short term engineering properties of high volume fly ash cement paste composed of mainly fly ash, silica fume, lime and cement. Five different mix proportions were prepared for each of two different fly ashes (ASTM C 618 Type C and Type F) at 100 mm slump. Physical (apparent specific gravity, dry unit weight, water absorption) and mechanical (compressive strength and flexural strength) properties of the cement pastes were investigated. The results indicate that the engineering performance of the final product can be adequate for use as construction material in various civil engineering applications such as stabilization of waste materials, production of bricks, blocks and ceramic tiles and the construction of structural fills, embankments, road bases and sub-bases. Keywords: Fly ash, cement paste, construction materials, consistency, porous materials.