Water cement ratio and slump test

In this article Learn : Water cement ratio and slump test Water cement ratio : It is the ratio of water and cement (by weight or by volume) used in the preparation of concrete. The quantity of water used in mixing concrete is very important. If the percentage of water used is less then there shall not be sufficient quantity of water to hydrate cement. It shall result in porous and weak concrete. However, the usual tendency is to use too much water which gives a more workable mix but it does not give sound concrete. Too much of water results in segregation of aggregates and gives porous concrete of low strength and low density. (Fig. 8.1.).   A certain minimum proportion of water is necessary in order to hydrate the cement completely. To make the concrete sufficiently workable to be placed in position some more water is needed. So…

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