METHOD TO DETERMINE DEPENDENCE OF CONCRETE FROST RESISTANCE GRADE ON WATER-CEMENT RATIO Russian patent published in 2013 - IPC G01N33/38 

FIELD: construction.

SUBSTANCE: previously they make at least two samples with different water-cement ratios, thermal cycling and cyclic compression of the sample with the least water-cement ratio are alternated until proportion is disturbed between relative residual deformation and number of cycles, the ratio is calculated between relative reduction of threshold load and relative residual deformation, the concrete grade of frost resistance is determined, as well as relative residual deformation ε_m, corresponding to reduction of the strength limit specified by the standard for the frost resistance grade of the investigated concrete, they alternate thermal cycling and cyclic compression of other samples with higher water-cement ratios until residual deformation is achieved ε_m, the number of cycles required for this purpose is accepted as the grade of concrete frost resistance with higher water-cement ratio, using the produced results, they calculate parameters of the function that approximates experimental results.

EFFECT: expanded arsenal of technical facilities for detection of concrete frost resistance dependence on water-cement ratio.