Concrete and Cement Manufacturing Process PDF
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This document details the definition of cement and the manufacturing process of Ordinary Portland Cement (OPC). It outlines the steps involved in creating a semi-liquid mixture, or slurry, from limestone and clay, processing it through a kiln, and finally, cooling and grinding the clinker to form cement powder.
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TOPIC: CONCRETE OBJECTIVES: · Definition of cement · Manufacturing of Ordinary Portland Cement (OPC) CONTENT: (CEMENT + WATER) + (SAND + STONES) = CONCRETE Cement/water paste + aggregates = concrete ·...
TOPIC: CONCRETE OBJECTIVES: · Definition of cement · Manufacturing of Ordinary Portland Cement (OPC) CONTENT: (CEMENT + WATER) + (SAND + STONES) = CONCRETE Cement/water paste + aggregates = concrete · Cement is a substance that binds aggregates together into a very dense material that possesses great compressive strength. · Manufacturing of OPC Portland Cement Portland cement is used in the manufacturing of concrete and mortar. It may also be used as a bed for clay and cement tiles. Step 1: Ordinary Portland Cement is made by mixing limestone and clay with water to form a semi-liquid mixture, or slurry. Step 2: The slurry is screened and is passed into a storage tank where it is kept agitated in preparation for passage into a kiln, Step 3: The slurry is fed into the upper end of the kiln and flows down to the direction of the heat. As the kiln revolves, it dries the slurry. Water evaporates under this intense temperature heat fusing the materials into a clinker or cement noodles. Step 4: The clinker is cooled and ground to a fine powder. A small amount of gypsum is added to retard the setting time of the cement.
