Question

If t1=Time at which water is first added to cement, t2=Time when needle fails to penetrate 5 mm to 7 mm from bottom of the mould, t3=Time when the needle makes an impression but the attachment fails to do so, then what is initial setting time?

a.

t2-t1

b.

t2+t1

c.

t3-t1

d.

2*t1

Posted under Concrete Technology

Answer: (a).t2-t1

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Q. If t1=Time at which water is first added to cement, t2=Time when needle fails to penetrate 5 mm to 7 mm from bottom of the mould, t3=Time when the needle makes an impression but...

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