Concrete: partial replacement of cement with commercially available rice husk ash

Abstract

Because they are more readily available, less expensive, nontoxic, and biodegradable than chemical coagulants, natural coagulants are now showing to be excellent alternatives. This study examines the coagulation method of treating very turbid surface water using sesame and peanut seeds as a natural coagulant. The potential, suitability, efficacy, and efficiency of sesame and peanut seeds as environmentally friendly natural coagulants for the treatment of highly turbid water are the subject of this study. It also looks at the effects of each coagulant on the water's pH and compares the two to see which is better at removing turbidity from water. Following the extraction of the active coagulation component using distilled water and a salt solution, sesame and peanut seeds were employed. The jar test findings demonstrated that peanut seeds extracted with KCL Furthermore, the outcomes demonstrated that sesame seeds are not as successful in eliminating turbidity from water as peanut seeds are in doing so. Thus, this study has shown that one of the most promising natural coagulants for treating water is peanut seed. Due to its naturally high compressive strength, concrete is the most widely used building material in the world for a variety of structural applications. However, the process of making cement, one of the key ingredients that gives concrete its strength, is energy-intensive, expensive, and releases a significant amount of CO2 into the atmosphere, which contributes to global warming and climate change. Therefore, using waste material with pozzolanic qualities in place of some of the cement can help create a Rice husk ash (RHA) has two different forms of silica: amorphous and crystalline. The former, which can be attained by carefully managed burning, is more responsive to pozzolanic activity. The goals of this study are to ascertain the ideal replacement level of RHA based on the compressive strength of the concrete, as well as the workability and compressive strength of concrete adding commercially sourced rice husk ash. In this investigation, concrete grade M25 was utilized without the use of a water-reducing additive. At10%, 15%, and 20%, cement is substituted by weight with rice husk ash. The slump value reduces as RHA content increases, according to the results. A compressive test was conducted at 7 and 28 days of age. 15% has been found to be the ideal level of RHA replacement, where the compressive strength.