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If L1=Measurement taken after 24 hours of immersion in water at a temp. of 27 ± 20^oC and L2=Measurement taken after 3 hours of immersion in water at boiling temperature. Then what is soundness of cement?(a) L1+L2(b) L1/L2(c) L1-L2(d) L1*L2I had been asked this question in a national level competition.Question is taken from Testing of Cement topic in section Types of Cement and Testing of Cement of Concrete Technology

Answer»

The CORRECT choice is (c) L1-L2

For explanation: L1-L2 is the FORMULA to calculate the soundness of CEMENT. First take the reading after immersion in water then MEASURE it after 3 hours of immersion in boiling water.



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