由于水化热的作用 ,大体积混凝土的温度通常较高 ,从而使得其强度发展规律与标准养护条件下有所不同。高强、高性能混凝土中通常掺入大量混合材料 ,此时 ,水化热对大体积混凝土的强度产生怎样的影响是工程技术人员普遍关注的问题。为此 ,设计制作了 5 0 0× 5 0 0× 5 0 0mm半绝热状态的大体积凝土模拟试样 ,通过钻芯取样 ,研究了不同复合胶凝材料高强混凝土的强度发展规律。结果表明 :当混凝土温峰为 60℃左右时 ,不掺混合材料的基准混凝土 ,其各龄期强度比标准养护低 2 5～ 3 0 %左右 ;采用复合胶凝材料配置的混凝土 14天强度仅降低 5 %～ 10 % ,2 8天后降低 15 %左右。因此 ,合适的复合胶凝材料更有利于大体积混凝土的强度发展 Due to the heat of hydration, the mass concrete usually has a high temperature, which makes the strength development rule different from the standard curing conditions. High-strength, high-performance concrete usually incorporates a large number of mixed materials, at this time, hydration heat on the strength of the mass concrete has what effect on the engineering and technical personnel of general concern. Therefore, a large volume concrete simulative specimen of 500 × 500 × 500 mm semi-adiabatic condition has been designed and manufactured. Through the core sampling, the strength development of high strength concrete with different composite cementitious materials has been studied. The results show that when the temperature of concrete is about 60 ℃, the strength of concrete at different ages is about 25% ~ 30% lower than that of standard curing. The 14 days strength of concrete with composite cement is only Reduce 5% ~ 10%, 28 days after the reduction of about 15%. Therefore, the suitable composite cementitious material is more conducive to the development of the strength of mass concrete