Abstract
According to the orthogonal experimental design, the changes of compressive strength of shaft concrete with different lengths, widths and depths of cracks and different concentrations of sodium chloride solution were studied. The test results show that the higher the concentration of sodium chloride solution is, the stronger the compressive strength of concrete will be when the shaft concrete with fracture is soaked for 60 or 90 days. The order of cracks has the same order of influence on the compressive strength of concrete immersed in different concentrations of sodium chloride solution, that is, the depth of crack has the greatest influence, followed by the length, and the width has the least influence. The test combination with the minimum influence of crack on compressive strength of concrete is 4cm in length, 0.3mm in width and 1cm in depth.
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