Answer / Md Irshadur Rahman

The proportions used in cement mortar are specified in various Indian Standards (IS) like IS 104, IS 516, and IS 3892. To ensure correctness, follow these steps: 1) Understand the intended application of the mortar. Different applications require different mix proportions. 2) Refer to the relevant IS code for the specific mix proportion required for your application. For instance, for general plastering work, a 1:6 ratio (cement : sand) is often used according to IS 3892. 3) Verify the weight of cement and aggregate used in your mixture matches the specified proportions. 4) Ensure proper curing of the mortar as mentioned in the standards.

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