低液限粉土改性机理及加固材料研究

低液限粉土较一般土质粒径集中级配差,孔隙率大,毛细作用剧烈若直接用作路基填土会导致路基难以压实,强度低,水稳定性差,对路基造成极大的危害。根据相关的室内试验对低液限粉土特性进行分析,通过在低液限粉土掺入一定配比的改性加固材料如石灰、水泥、水玻璃、粘土等改善低液限粉土的物理特征,提高强度。试验证明掺入水泥和水玻璃能有效的提高低液限粉土强度提高,水泥提高效果较增幅小,掺入小比例的水玻璃可以大幅提高粉土的强度。

STUDY ON MODIFICATION MECHANISMAND REINFORCING MATERIAL OF LOW LIQUID LIMIT SILT

The low-liquid-limited silty soil is more concentrated than the average soil particle size, and the porosity is large. If the filling effect is strong, it is difficult to compute the roadbed, and the strength is low and the water stability is poor. The According to the relevant indoor test, the characteristics of low-liquid-limited silt were analyzed. By adding a certain proportion of modified reinforcing materials such as lime, cement, water glass, clay and so on in low liquid limit silt to improve the physical Characteristics, improve strength. Experiments show that the incorporation of cement and water glass can effectively improve the strength of low liquid limit silt, cement increase effect is relatively small, mixed with a small proportion of water glass can greatly improve the strength of silt..