Investigation on Sustainable Concrete using Manufactured Sand and Rice Husk Ash

As we know that concrete is the second largest consumed material by humans in the entire world after water. If its consumption is done at the same rate, it may get exhausted in the coming future. So we have to find alternatives to replace concrete. Or else as we know that concrete is a mixture of cement, sand and gravel. We can preserve concrete by finding replacement material for cement, sand or gravel which can give same or more strength to concrete. In past, already many replacements were done by many people for cement, sand and gravel to make better concrete. The present proposal involves replacement of river sand with manufactured sand by 25%, 50%, 75%, 100% and cement with rice husk ash by 10% to get good strength concrete. Use of manufactured sand and Rice husk ash in concrete as replacement for sand and cement respectively is very rare and as both the materials are easily available and are of low cost. It would become the best replacement if it gives good strength concrete.