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Tests for Concrete
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28 days acid action admixtures alkali aluminous cement applied beam brick Building Research Station calcium carbonate calcium chloride calcium hydroxide calcium sulphate carbon dioxide cause cent chemical clay clinker coarse aggregate coating coefficient coke breeze compressive strength compressive stress contraction cracks crushing strength cubes cubic foot curing cylinders disintegration effect efflorescence expansion factors flow grading granite gravel greater hardening Haydite hydrate impermeable increase insoluble instantaneous deformation laboratory limestone magnesium material method mixture modulus of elasticity moisture mortar mortar and concrete moulds obtained occur oils period permeability plastic pores Portland cement concrete present produced proportions pumice rapid-hardening reinforced concrete resistance salts sand sea water shrinkage silicate slabs slag soaps sodium sodium silicate soluble solution specimens square inch steel storage strength of concrete structure sulphate sustained load sustained stress TABLE temperature tensile tests tion volume changes water-cement ratio waterproofing watertight weight