Computer · Concrete Technology
IS 12269-2013 के अनुसार, साधारण पोर्टलैंड सीमेंट (ग्रेड 53) का प्रारंभिक जमाव काल (initial setting time), जो पानी मिलाने और सीमेंट के अपनी सुघट्यता (plasticity) खोना शुरू करने के बीच का समय है, किससे कम नहीं होना चाहिए?
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