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In Construction of PCC Road and street, In the first step lean concrete (1:4:8) is laid and then 4" thick 1:2:4 is laid, the question is after how much duration 1:2:4 be laid on 1:4:8.?

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Question added by Muhammad Khalil , Chief Engineer (Civil) , Water and Sanitation Services Mardan
Date Posted: 2016/05/25
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Muhammad Khalil
by Muhammad Khalil , Chief Engineer (Civil) , Water and Sanitation Services Mardan

Dear Faisal what will be the disadvantages if 1:2:4 is laid after one or two hours of laying 1"4:8

Muhammad Faisal Chaudhary
by Muhammad Faisal Chaudhary , QC Manager , Al-Fanar Construction

it depend upon the atmospheric tempurature also but in general minimum 24 hours maximum 72 hours.

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