固废基固化材料稳定低液限黏土试验研究

Experimental study on stabilizing low-liquid-limit clay with solid waste based soil stabilizer

通过室内试验,对比分析了工业固废基固化材料和粉煤灰硅酸盐水泥稳定低液限黏土的无侧限抗压强度、CBR值、水稳定性以及抗干湿循环等性能。结果表明:随着固化材料掺量的增加,工业固废基固化材料稳定土的最佳含水率增大、最大干密度减小。与粉煤灰硅酸盐水泥相比,低掺量(3%)下,工业固废基固化材料稳定土的物理力学性能与之相当;但较高掺量(4%~6%)下工业固废基固化材料稳定土可获得更高的CBR值和无侧限抗压强度。且相同掺量和龄期下,工业固废基固化材料稳定低液限黏土的水稳定性和抗干湿循环性能更优。

Through laboratory tests,the unconfined compressive strength,CBR,water stability and resistance to dry-wet cycles of industrial solid waste based soil stabilizer and Portland cement stabilized low-liquid-limit clay were compared and analyzed.The results show that the optimum moisture content of the soil stabilized by industrial solid waste based soil stabilizer increases and the maximum dry density decreases with the increase of soil stabilizer content.Compared with Portland cement of fly ash,the physical and mechanical properties of stabilized soil with low content(3%)of industrial solid waste based soil stabilizer are equivalent with cement stabilized soil,but the stabilized soil with higher content(4%~6%)of industrial solid waste based soil stabilizer can obtain higher CBR values and unconfined compressive strengths.Under the condition of the same dosage and age,the water stability and resistance to dry-wet cycles of low-liquid-limit clay stabilized by industrial solid waste based soil stabilizer are better than that of cement stabilized soil.