水泥、二灰固化剂在黄土改良中的对比研究

Research on Comparison of Curing Agents of Cement and Lime Fly-Ash in Loess Improvement

对比水泥固化剂与二灰固化剂对黄土不良工程性能的处置效果,通过测量CBR值得出:随着二灰与水泥掺量的增加,土体承载能力上升,膨胀率下降,其中5%掺量水泥膨胀率最低为0.08%,回弹模量比5%二灰组高,90d养生试件中,5%水泥掺量组与5%二灰掺量组比较,强度损失低了2.8%、无侧限抗压强度高了0.114MPa。

The solution for the disposal effects of curing agent of cement and curing agent of lime fly- ash in poor engineering properties of loess is compared. Through the measurement of CBR value,we obtain that with the increase of mixing amounts of lime fly- ash and cement,the bearing capacity of soil mass rises,the expansion rate goes down,among which,the lowest expansion rate of cement with 5% mixing amount is 0. 08%,and the modulus of resilience is higher than that of lime fly- ash with 5% mixing amount. In 90 d test piece of health maintenance,the group with 5% mixing amount of cement and the group with 5% mixing amount of lime fly- ash are compared,the strength loss decreases 2. 8%,and the unconfined compressive strength increases 0. 114 MPa.