Influence of Rice Husk Ash on the properties of Concrete: a Review

Rice husk ash (RHA), produced by burning rice husk under controlled conditions, due to its high activity and high specific surface area, can be applied to concrete by replacing cement, such as in normal concrete and high-strength / high-performance concrete. In addition, its application in ultra-high strength concrete has also been reported. Many experimental studies have shown that, RHA improves the mechanical properties of concrete, decreases permeability properties and significantly ameliorates its durability. The adverse effect of reducing a slump of concrete can be resolved by increasing water reducing agent. RHA in concrete has a preferable application prospect in the future. This paper will summarize many experimental results of the application of RHA in concrete and become a reference for further research on the use of RHA in concrete.