高液限土最佳掺水泥比的确定

本文分别进行了9组代表性广东省云罗高速沿线高液限土掺水泥0%、1.0%、1.5%、2.0%、2.5%、3.0%后的承载比试验。按照细颗粒含量、液限、素土CBR值分别对高液限土进行分类，根据掺水泥改良后的CBR值为20时，分别确定不同分类高液限土的最佳掺灰比例范围，再综合考虑这三种不同要素确定最佳掺灰比例范围。得出有益的结论：细颗粒含量对CBR值的影响大于液限；高液限土的最佳掺灰比在2.0%左右；对液限较低、细颗粒含量较小的高液限土可直接填筑；对液限高、细颗粒含量大的高液限土应作弃方处理。

Determine the Best Ratio of Mixed Cement of High Liquid Limit Soil

Nine representative groups of CBR test of the high liquid limit soil improved by cement of 0%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0% along the Yunluo expressway of Guangdong province is conducted. The cement content at CBR value of 20 is respectively determined as the optimal cement content of high liquid limit soil classified by the different fine particles content, liquid limit, prime soil CBR values. The best cement content range is determined considering integrally the three different elements, and useful conclusions were gained. The effect of fine particles content on CBR value is greater than that of liquid limit. The optimal cement content of high liquid limit soil fluctuates in value of 2.0%. High liquid limit soil of lower liquid limit and smaller fine particles can be directly filled; High liquid limit soil of higher liquid limit and bigger fine particle content should be abandoned.