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According to the recommendations laid by the Concrete Association of India, what should be the least strength of the blocks used in concrete masonry?(a) 3 N/mm^2(b) 4 N/mm^2(c) 2 N/mm^2(d) 5 N/mm^2This question was posed to me during an interview for a job.I'd like to ask this question from Composite Masonry in portion Composite Masonry of Construction & Building Materials

Answer»

Right answer is (a) 3 N/mm^2

The EXPLANATION is: Concrete Association of INDIA recommends that the STRENGTH of the blocks used in concrete masonry should be at least 3 N/mm^2 and the recommended size of common blocks used in cement concrete masonry are 39 cm x 19 cm x 30 cm; 39 cm x 19 cm x 20 cm and 39 cm x 19 cm x 10 cm.



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