CEMENT CONCRETE

         CEMENT CONCRETE

    

                                                   

It is a hardening construction material made up of cement, sand aggregate, and water in a limited proportion. Portland cement is the most often used type of cement in the production of concrete. Concrete Technology is concerned with the study of concrete characteristics and their practical applications.

The Cement Concrete is manufactured by two ways:-                                                         

• Nominal Mix Concrete
• Design Mix Concrete

1) Nominal Mix Concrete: - In a nominal mix, materials like cement, sand, and aggregate are not placed under ideal conditions prior to mixing. It is difficult to determine the assurance of concrete quality and strength corresponding to the desired strength. In this quality control is sacrificed. Skilled workmanship is also sacrificed, resulting in insufficient strength.

2) Design Mix Concrete:- In a design mix, materials like cement, sand, and aggregate are kept under ideal temperature and humidity. In this type of mix concrete is made at a nodal place called a batching plant and then transported to the site through transit mixture. During transportation, the appropriate temperature for the ideal proportion mix is maintained by admixtures such as plasticizers and superplasticizers, which do not change the strength of the mix proportion of concrete but delay its setting time.