effect of temperature on compressive strength of concrete with the addition of kaolin as a substitute some fine aggregate

This research aims to; (1) Determine the feasibility of using kaolin from Pawangi Village, Capkala District, Bengkayang Regency, West Kalimantan Province when used as a substitute for some fine aggregate (sand). (2) To find out the description of compressive strength after burning and the model of the relationship between temperature and compressive strength of concrete with mixture, kaolin is used as a substitute for some fine aggregate (sand). (3) Determine the most optimal composition of kaolin mixture against the compressive strength of normal concrete and also due to the influence of temperature. The type of research used in this study is a qualitative experiment on the structure of concrete materials using kaolin as a substitute for fine aggregate. The concrete that is planned is of K-250 quality, in line with the quality standards of concrete used in residential structures (1 to 2 floors). The kaolin mixture used is a percentage of 0%, 25%, and 50% of the weight of sand according to the job mix formula for the quality of K-250 concrete. After 28 days the resulting concrete sample is fired in an oven (kiln).