水泥土的强度及影响因素初探

对镇江软粘土进行室内水泥稳定化实验,研究水泥掺量、养护令期、添加改良剂、浸水湿养护及初始条件对强度增长的影响,力求通过强度变化间接了解水泥土的固化程度,为工程施工中掌握合适的条件,充分发挥水泥土的作用提供依据。实验结果表明:掺加5%的水泥土强度明显高于原素土;加入改良剂可提高水泥土的早期强度,水泥土28天强度占标准强度的比例从40%增加到67%;湿养护比标准养护更有利于强度增长,添加7 8%的改良水泥土78天强度可达到8 3MPa。

Intesity of Cement Soil and Influencing Factors

The soft clay of Zhenjiang was tested in lab to decide its in-lab cement stability. To study such influences as the amount of cement added, the period of curing, strengthening additives, immerge-in-water curing, and the initial conditions. To try to know the cement solidation level by changing the intensity. Tests results: Mixing with 5% cement, the intensity is obviously higher than that of the original pure soil; mixing with strengthening additives, the initial intensity of the cement can be improved, the intensity at the 28th day is increased from 40% to 67% of the standard intensity; the wet curing is more beneficial to the improvement of the intensity than the standard curing; and mixing with 7.8% strengthening cement, its intensity at the 78th day can reach 8.3 MPa.