FZ-H80浇筑水泥基外加剂试验研究及应用

Experimental Research and Application of FZ-H80 Cement-based Admixture

为解决某矿浇筑混凝土强度低、易开裂和抗渗能力不足的问题,采用抗压、抗折、抗渗和微膨胀性能试验方法,分析了不同掺量的FZ-H80浇筑水泥基外加剂对浇筑混凝土力学性能的影响,解释了增强作用机理,并利用温度传感器对浇筑混凝土内部温度进行监测。结果表明:掺量为12%的浇筑水泥基外加剂为最佳配比,抗压和抗折强度增长率分别为10.7%和14.6%、膨胀率为0.28%、抗渗级别达到S34;浇筑混凝土井壁内外温差在合理范围内,表面致密光滑未出现开裂渗水现象,支护效果显著。

In order to solve the problem of low strength, easy cracking and impermeability of pouring concrete in a coal mine, with the test methods of anti-pressure, anti-folding, anti-permeability and micro-expansion, the influence of different dosage of FZ-H80 cement-based additives on the mechanical properties of concrete was analyzed. The mechanism of reinforcement is explained,and temperature sensor is used to monitor the temperature of concrete. The results show that： the dosage of pouring 12% cementbased admixture is the best ratio, anti-pressure and anti-folding strength growth rate is 10.7% and 14.6% respectively, the inflation rate is 0.28%, permeability level reaches to S34; the internal and external temperature difference of the concrete wall is within a reasonable range, and there is no cracking and seepage phenomenon on the surface, and the support effect is remarkable.