Strength and durability of concrete by partial replacement of cement by fly ash and fine aggregates by granite dust

Abstract

The building sector is one of the most dynamic and potentially important contributors to national income. It's possible that concrete, as a composite building material, plays a pivotal role in the market. Common concrete calls for the use of natural sand, often known as stream sand. Since river sand is becoming more scarce and prohibitively costly, we have had to go elsewhere for this material. With the ever-increasing need of the construction industries for materials that fulfil their functional, strength, and durability needs, a wide range of novel materials has been produced in the area of concrete technology in recent years.In this investigation, fly ash was substituted for the fine combination of Quarry Dust and cement. Partially substituting Fly Ash for Cement at 0%, 5%, 10%, 15%, 20%, and 25%. The increased moisture electrical resistance and resulting toughness that results from the micro-filling effect gives concretes a leg up on the competition. Compressive and flexural strengths of M40-grade concrete are the primary focus of the experiments. Examine the mechanical and sturdiness characteristics at various ages, including 7 days, 28 days, 56 days, and 90 days. Durability and tensile strength tests, including exposure to acid and chloride for 28 days. The results publicized that by taking 0% to 25% of Fly ash to the weight of cement that specimen when compared with conventional concrete the compressive strength is increased 32.63% by replacement of cement with 10% of Fly Ash for 28 days. Comparing to normal concrete the compressive strength is increased 29.25% with 10% of Fly ash for 56 days. Comparing to conventional concrete the compressive strength is increased 16.93% with 10% of Fly ash for 90 days. SPT values enhanced by 16.67% with 10% of Fly ash at 28 days of curing.