### Tests on Building Stones Strength and Properties of

5.1.2.1, Strength The strength of building stones should be ade- quate to carry the loads imposed. For ashlar and coursed rubble masonry, the strength shall be as worked in accordance with IS 1905 1987, taking into account, the appropriate crushing strength of stone as given in Table 1, and also The average of three specimens gives the crushing strength of concrete. The strength requirements of concrete. Calculations of Compressive Strength. Size of the cube 15cmx15cmx15cm. Area of the specimen (calculated from the mean size of the specimen )225 cm 2. Characteristic compressive strength(f ck)at 7 days Expected maximum load fck x ...

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