Water cement ratio in concrete- in hindi RCC-Part 8

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• published: 22 Feb 2016
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WATER/CEMENT RATIO Strength of concrete primarily depends upon the strength of cement paste. Strength of cement paste depends upon the dilution of paste or in other words, the strength of paste increases with cement content and decreases with air and water content. In 1918 Abrams presented his classic law in the form: S = A Bx Where x =water/cement ratio by volume and for 28 days results The constants A and B are 14,000 lbs/sq. in. and 7 respectively. Abrams water/cement ratio law states that the strength of concrete is only dependent upon water/cement ratio provided the mix is workable. In the past many theories have been propounded by many research workers. Some of them held valid for some time and then underwent some changes while others did not stand the test of time and hence slowly disappeared. But Abrams water/cement ratio law stood the test of time and is held valid even today as a fundamental truth in concrete-making practices. No doubt some modifications have been suggested but the truth of the statement could not be challenged. Strictly speaking, it was Feret who formulated in as early as 1897, a general rule defining the strength of the concrete paste and concrete in terms of volume fractions of the constituents by the equation: S = K (c/c+e+a)2 Other Videos of this Channel: Cement Manufacturing Process RCC -1 https://youtu.be/rzXAcaDdd9c Chemical Compounds in Cement, RCC Part-2 https://youtu.be/ICTaCi6QyGY Types Of Cement- in hindi RCC - Part3 https://youtu.be/uWuAi2nuR2I Consistency test of cement and Setting Times of Cement in hindi _ RCC Part-4 https://youtu.be/ksGvhwOk2Mo Soundness of cement - in hindi RCC Part-5 https://youtu.be/mpA7QVFTOBo RCC - Compressive Strength of cement- in hindi https://youtu.be/h0kJd4AUh-Q Aggregate crushing value test- in hindi Part-7 https://youtu.be/cv5gnd_dHjo Water cement ratio in concrete- in hindi RCC-Part 8 https://youtu.be/DCfmtOtIHUo Workability of Concrete- in hindi _ RCC Part 9 https://youtu.be/ZX_unUScSSE Properties of concrete, RCC-Part 10, https://youtu.be/aj-xzLF4xD0 Mix Design and Nominal Mix in Concrete RCC Part-11 https://youtu.be/DY6ulqUtt_U Fundamentals, Strength of materials in hindi Part-1 https://youtu.be/D28H9TrStOE Strength of materials in hindi Part-2 https://youtu.be/LMoUPoTYD0o Centroid and centre of gravity in hindi, Strength of Materials Part-3 https://youtu.be/baTojGhrDzI Moment of Inertia, Strength of materials in hindi Part-4 https://youtu.be/X32xAuOMjHs Shear Force and bending moment lecture in hindi, Strength of materials Part-5 https://youtu.be/Zlvl2kWHkhg