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 PCC - Plain Cement Concrete PCC is the concrete which is simply containing cement, sand, aggregates and water in suitable proportions. There are no reinforcement is provided in this type of concrete. It has much compressive strength than tensile strength. Practically, It has been observed that it is very weak in tension. Material used in PCC Cement - We can use any type of cement in PCC but Portland Pozzolona Cement is more common and suitable. Sand - It should be hard, durable, strong, clean and well - graded. Aggregates - They also should be hard, durable, strong and well graded. Fine aggregates act as fillers and coarse aggregates provide strength to the concrete. Water - It should be potable i.e. it should be clean and free from injurious amounts of acids, alkalis, salts etc. The hardening of concrete is taking place due to chemical reaction between cement and water. Properties of PCC  Uses of PCC  As a base for RCC foundation, ground floor and load bearing walls. As DPC at plinth

 We all know that all substances expands with increase in temperature and shrinks with decrease in temperature. RCC means Reinforced Cement Concrete. It is the combination of steel bars and concrete. When we design RCC, a strong joint takes place between concrete and steel bars which acts as one body. Now, when the temperature of atmosphere increases, both steel bar and concrete will try to expand. Similarly, when temperature falls, they will try to shrink. We use steel bar with concrete in RCC, because their coefficient of thermal expansion is approximately equal. Due to this reason, they expand or shrink at the same rate. Therefore, the joint between the steel bar and concrete remain stable. In the case of Al bar or Cu bar or bar of some other materials, difference between their coefficient of thermal expansion will be more. Hence, they will expand or shrink at different rate which will make the joint (between concrete and bar) unstable. Thank you. My youTube channel My quora space