Research on properties of high-volume fly ash concrete HVFC

Abstract

In recent years, researchers have focused on increasing the proportion of fly ash to replace cement in concrete, to take advantage of industrial waste and contribute to environmental protection. In this article, the workability properties (Method for slump test) of high-volume fly ash concrete (HVFC) mixtures are studied. The properties of HVFC concrete after curing were also studied such as compressive strength, tensile flexural strength, direct tensile strength and drying shrinkage of concrete. Test results on HVFC concrete samples show that the workability of the concrete mixture gradually increase when the fly ash replacement ratio is increased to 60; 70; 80 %. The compressive strength of concrete gradually increases over time, especially at later ages. Other mechanical properties such as tensile flexural strength, direct tensile strength, and drying shrinkage of HVFC concrete also have many outstanding advantages compared to ordinary concrete samples.