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On cooling below 1250^oC, C3S decomposes ____________(a) Fast(b) Slowly(c) Never(d) Depends on the conditionsI have been asked this question in final exam.The doubt is from Sampling in portion Concrete Mix Design of Concrete Technology

Answer»

Right answer is (b) Slowly

For EXPLANATION I would SAY: On cooling below 1250^oC, C^3S decomposes slowly but, if cooling is not too SLOW, C^3S remains unchanged and is RELATIVELY stable at ordinary temperatures.



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