Effects of minerai admixtures on fresh and hardened properties of self-compacting concretes: binary, ternary and quaternary systems

摘要

The paper presented herein investi gates the effects of using supplementary cemen titious materials in binary, ternary, and quaternary blends on the fresh and hardened properties of self-compacting concretes (SCCs). A total of 22 concrete mixtures were designed having a constant water/binder ratio of 0.32 and total binder content of 550 kg/m~3. The control mixture contained only portland cernent (PC) as the binder while the remaining mixtures incorpo rated binary, ternary, and quaternary cementi tious blends of PC, fly ash (FA), ground granulated blast furnace slag (GGBFS), and silica fume (SF). After mixing, the fresh properties of the concretes were tested for slump flow time, L-box height ratio, V-funnel flow time, setting time, and viscosity. Moreover, compressive strength, ultrasonic puise velocity, and electrical resistivity of the hardened concretes were mea sured. Test results have revealed that incorporat ing the minerai admixtures improved the freshrnproperties and rheology of the concrete mixtures. The compressive strength and electrical resistivity of the concretes with SF and GGBFS were much higher than those of the control concrete.