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crusher agent for in chennai

The use of air entraining in concrete (a) increase workability of concrete (b) decrease bleeding (c) decrease strength (d) all of these(Ans) The workability of concrete can be improved by adding (a) hydrated lime (b) fly ash (c) calcium chloride (d) all of these(Ans) For high degree of workability , the slump value should be (a) 0 to 25 mm

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