白鹤滩导流洞工程中低热硅酸盐水泥的应用研究

发布时间：2018-06-05 11:34

本文选题：低热硅酸盐水泥 + 中热硅酸盐水泥　；参考：《混凝土》2017年12期

【摘要】：研究了低热、中热硅酸盐水泥对导流洞混凝土的工作性能、强度、干缩、自生体积变形、内部温度等性能的影响,结果表明:与中热硅酸盐水泥混凝土相比,低热硅酸盐水泥混凝土前期强度较低,后期强度增长较快,90 d两者强度基本相同;同一龄期下,低热硅酸盐水泥混凝土干缩、自生体积变形和内部温度均较低。通过对导流洞混凝土性能的抽检,证明导流洞中应用低热硅酸盐水泥不仅混凝土强度、弹性模量、抗冻性能、抗渗性能满足设计要求,而且对导流洞裂纹控制也有很大的改善作用。
[Abstract]:The effects of low-heat and medium-heat Portland cement on the performance, strength, dry shrinkage, autogenous volume deformation and internal temperature of concrete in diversion tunnel are studied. The results show that: compared with medium-hot Portland cement concrete, The early strength of low thermal Portland cement concrete is lower, and the later strength increases faster than 90 days. At the same age, the dry shrinkage, autogenous volume deformation and internal temperature of low thermal Portland cement concrete are lower. Through the sampling test of concrete performance of diversion tunnel, it is proved that the application of low-heat Portland cement in diversion tunnel not only meets the design requirements of concrete strength, elastic modulus, frost resistance and impermeability, but also proves that the concrete strength, elastic modulus, frost resistance and impermeability meet the design requirements. Moreover, it can improve the crack control of diversion tunnel.
【作者单位】：水利部长江科学院工程质量检测中心;
【基金】：中央级公益性科研项目(CKSF2017032/JC,CKSF2017034/JC)
【分类号】：TV431

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