低掺入土聚水泥固化软土的试验研究  

EXPERIMENT ON LOW RATION OF GEOPOLYMER CEMENT FOR STRENGTHENING SOFT SOIL

作　　者：林木[1,2] 高彦斌[1,2] 袁祥成[1,2] 

机构地区：[1]同济大学岩土及地下工程教育部重点实验室,上海200092 [2]同济大学地下建筑与工程系,上海200092

出　　处：《低温建筑技术》2015年第11期108-110,共3页Low Temperature Architecture Technology

摘　　要：水泥土搅拌法是加固软土地基的常用方法,固化剂和水泥掺入比的选择直接关系到水泥土地基的整体强度和工程成本。基于上海软土特点,模拟第四层天然软土和吹填土,通过室内配合比试验和水泥土强度分析,研究了在土聚水泥GEOTONE1000和普通硅酸盐水泥P.O32.5为固化剂以及含水量为45%和75%的情况下,低掺入比对水泥土无侧限抗压强度的影响。研究发现,在含水量及掺入比相同的条件下,两种水泥土的无侧限抗压强度增长规律大致相同;当掺入比大于5%时,水泥土强度增长效果十分明显;GEOTONE1000水泥土强度为P.O32.5水泥土强度的2-3倍,显示出土聚水泥在软土地基加固领域广阔的应用前景。Cement-soil mixing method is widely used for reinforcing soft soil at Shanghai area. Curing agent and cement ratio, which are closely related to the foundation strength and engineering cost, can be regarded as decisive factors of this method. In order to analyze low cement ratio impact on unconfined compressive strength of cement-soil, this research applies indoor mixture ratio test and cement-soil strength analysis to compare the growth curves under different curing agents （GEOTONE1000 and P. O32.5 ） and moisture contents （45% and 75% ）. The result shows that the two cement-soils have a similar growth curve of unconfined compressive strength under same moisture content and cement ratio, while the strength will be rapidly increase if cement ratio is over 5%. This paper also proves that the strength of GEOTONE1000 is as 2-3 times as that of P. O32. 5. And it is clearly shown that the geopolymer cement can be widely used.

关 键 词：水泥土 无侧限抗压强度 低掺入比 土聚水泥 

分 类 号：TU471.8[建筑科学—结构工程]