RICE HUSK ASH CONCRETE

Concrete is the most versatile construction material because it can be designed to withstand the harshest environments while talking on the most inspirational forms. Engineers are continually pushing the limits to improve its performance with the help of innovative chemicals admixtures and supplementary cementitious materials (SCM). Perhaps the most successful SCM is Rice Husk because it improves both strength and durability of concrete to such extent that modern design call for the addition of rice husk for design of high strength concrete. In the last decades, the use of residue in civil construction, especially in addition to concrete, has been subject to many researches due to, besides to reduce the environmental polluter’s factors, it may lead several improvements of the concrete properties.

RICE HUSK ASH (RHA) :

Rice husk is the outer cover of a rice panicule. On burning the rice husk the Rice Husk Ash is obtained. By using optimum dosage of rice husk the cement content can be reduced to obtain the increment in strength of concrete. It increases the compressive strength of the concrete. And also the cement content is reduced.

Partial replacement of cement by Rice Husk at 10% gives maximum Strength in compare to the conventional concrete. Workability of the RHA concrete is more than the conventional concrete and also RHA concrete is more eco-friendly than the conventional concrete

ADVANTAGES:

Ø  Increased compressive & flexural strength

Ø  Reduced permeability

Ø  Increased resistance to chemical attack

Ø  Reduced effects of alkali-silica reactivity

Ø  Reduced shrinkage

Ø  Enhanced workability

Ø  Reduced amount of super plasticizer