The method of assessing composition of hardened concrete elaborated in Building Research Institute is relatively simple. The method is designed for determination of Portland cement, aggregate — limestone, gravel and sand contents in concrete. The error in the method does not exceed 2% in relation with volume density of concrete in case when components comply with government standards.
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- (1).A. Jarmontowicz, R. Krzywobłocka-Laurow, Instruction for determination of composition of hardened concrete, ITB 1978 / in polish /Google Scholar