碱激发工业废渣双液注浆材料抗溶蚀性能试验研究

Research on anti-aqueous solubility performance of alkali-activated industrial residue double solution grouting materials

采用结石体强度损失率、Na+固化率、硅酸根溶出量、电导率、溶出物质总量等方法对比研究了纯水泥(C0)、钢渣(C1)、钢渣+粉煤灰+矿渣(C2)、钢渣+粉煤灰+偏高岭土(C3)四个系列双液注浆材料的抗水溶蚀性能。结果表明:在水溶蚀作用360 d条件下,工业废渣类强度损失率、可溶性Na+、硅酸根溶出量、电导率、溶出物质总量都低于水泥系列的。并采用压汞法(MIP)、X射线衍射(XRD)、扫描电镜(SEM)探讨了四种双液注浆材料的水化硬化、结构形成过程及抗溶蚀机理,为碱激发工业废渣类注浆材料的研究提供了理论支持。

The anti-aqueous solubility performance of series of double solution grouting materials was studied by means of percentage loss of compressive strength, solidified fluid fraction of Na＋, the amount of dissolved Si, electric conductivity （EC） and total dissolved solids （TDS）.It was shown that the compressive strength of grouting material with industrial residues had less loss as cured in water for 360 d.The grouting materi- al with industrial residues had less value of dissolved SiO4：-, EC and TDS compared with that of the cement-based grouting material.This indicated that the anti-aqueous solubility performance of grouting material with industrial residues is better than the cement-based grouting material.The hydration and harden mechanism and structure-formation process of double solution grouting material with and without industrial residues were researched by mercury intrusion porosimetry,X-ray diffraction and scanning electron microscope, the results of which further confirmed the better anti-aqueous solubility performance of double solution grouting material with industrial residues.