早强型水泥浆液材料的试验研究及在锚固工程中的应用

Study and Application of the Cement Grouting Material of Increasing Primary Strength for Anchor Engineering

根据锚固工程锚固体浆液灌注和张拉锁定的作业要求,采用正交试验法对普通硅酸盐水泥浆液进行改性研究。试验确定了氯化钠、硫酸钠、三乙醇胺、水玻璃、纤维、硅灰等水泥外加剂或填料的加量比例,在满足浆液可泵期(15-50m in)的前提下,使结石体2-3d凝期抗压强度提高到15-25MPa,与改性前的纯水泥浆液相比,其抗压强度提高了50%-100%,从而加快了锚固工程施工速度,使支护边坡位移得到及时的控制。工程实践证明,这些经改性的水泥浆液应用效果显著。

According to the requirement of grouting and locking work for anchor engineering, through straight test on the modification of common silicate cement liquid, types and weights of the cement＇s additive have been chosen and obtained, such as sodium chloride, sodium sulphate ,three -ethanol amine ,sodium silicate, silica ash, fiber and so on. Under the condition that pumping period （ 15 - 50 min） of the cement slurry is suitable, the press strength of common silicate cement grouting liquid could increase 50 to 100 percent than no -modificated cement grouting in two or three days condensing time, that it is 15 -25 MPa, which would greatly enhance the construction speed Of anchor engineering. And the practice shows that application effect of cement grouting which has been modified is remarkable.