Effect of utilization of rice husk ash on hardened properties of recycled concrete aggregate

Abstract

The manufacturing of Portland cement accounts for more than 5 percent of worldwide carbon dioxide emissions. The rising expense of conventional building materials, as well as the need to ensure longterm growth in the construction industry, have encouraged designers and developers to investigate alternate materials for use in civil engineering constructions. An excellent way to accomplish this is to make use of agricultural byproducts. They can be employed as cementing materials because of their pozzolanic tendency, which would otherwise necessitate the usage of enormous areas of land for the dumping of these agricultural byproducts. As a result of the existence of these components within concrete not only helps to minimize carbon dioxide emissions, but it also contributes to the major enhancement in the workability, and durability of the concrete. Goal of this research is to discover whether or not it is feasible to use rice husk ash as a concrete addition., as well as efforts were undertaken to determine the parameter affecting concrete's strength (Compressive strength). The IS technique of mix design was used to control concrete, and a mix design for replacement approach was created using this as a foundation. In terms of replacement approach, five distinct replacement levels of rice husk ash (RHA) have been selected for the study: 5%, 7.5%, 10%, 12.5%, and 15%. A 25% of recycled coarse aggregate (RCA) has been selected as a partial replacement of virgin coarse aggregate in the mix. The present study takes into account a wide duration of time needed for cure ranging from 7 days to 14 days to 28 days. According to the findings, the compressive strength gradually improves from 7 days to 14 days after the experiment, and additionally, there is a considerable improvement in strength (compressive) from 7 days to 28 days. Copyright (c) 2022 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the Material TECH 2022 (Second International Conference on Materials and Technologies).