Mechanical Properties of Concrete made with Calcined Clay

Abstract

Concrete is the basic material of the construction industry. Total cement production has increased significantly, and it is associated with CO₂ emissions, causing many environmental problems. The high energy costs associated with cement production and the environmental issues associated with carbon dioxide emissions have created pressure to reduce cement consumption through the use of supplementary materials. Today, there is also a shortage of river sand. Therefore, supplementary / alternative materials for concrete, fine aggregate and coarse aggregate should be considered. The work in progress aims to take charge of such materials. In this article, supplementary materials such as metakaolin are used for concrete as a partial substitute for cement, and river sand and Manufactured sand are used as fine aggregates. This experimental study has used concrete with a compressive strength of 20 MPa. Comparison on the mechanical properties such as compressive strength, tensile strength and flexural strength with modified concrete was carried out. In addition, the modified concrete was evaluated using non-destructive testing methods such as Rebound Hammer and ultrasonic pulse velocity. Also, a relationship is established between the compressive strength and non-destructive tests. As a result, it was found that the modified concrete is better than normal concrete.