In order to analyze the correlation between maturity and strength at the micro level,the con-crete strength prediction mechanism was studied from the aspect of the relationship between the matu-rity and the generation of hydration products,and the establishment of maturity rules was verified.X-ray diffraction(XRD)was used to analyze the composition of various phases in cement stone at differ-ent curing temperatures and ages,and the relative generation amount of each phase was determined through the integral intensity method.The experimental results show that the relative generation a-mount of calcium hydroxide increases with the increase of maturity value,while the relative generation amount of ettringite first increases and then decreases with the increase of maturity value,and is not affected by the temperature history experienced by the cement stone.The relative generation amount of hydrated calcium silicate has the same law as that of calcium hydroxide.When the maturity of ce-ment stone is equal,the relative generation of calcium hydroxide and ettringite in cement stone is roughly equal under different temperature histories.
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