纳米硅粉水泥土的强度特性及固化机理研究

将性能优异的纳米硅粉作为外掺剂应用于水泥土改性研究。通过室内试验，探讨了纳米硅粉水泥土的强度特性。试验表明，一定掺量下的纳米硅粉能够显著提高水泥土的各个龄期强度。结合试验测试和理论分析，探讨了纳米硅粉在水泥水化硬化过程中的作用以及纳米硅粉与土之间的作用，在此基础上，分析了纳米硅粉改性水泥土工程性状的机理，旨在为纳米硅粉应用于工程实践开展理论和试验研究探索。

Study on strength property of nanometer silica fume reinforced cemented soil and reinforcement mechanism

The nanometer silica fume with particular characteristics was used as a new kind of additive for cemented soil. Based on the experiments, strength characteristics of nanometer silica fume reinforced cemented soil have been analyzed. The results suggest that nanometer silica fume can greatly improve the unconfined compression strength of cemented soil at various curing periods. Then, action of nanometer silica fume in the hardening process of cement paste and action of nanometer silica fume and clay are analyzed. The reinforcement mechanism of nanometer silica fume in cemented soil is analyzed. The paper will provide inspirations for further studies on application of nanometer silica fume in the field of civil engineering, especially in the reinforcement of soft soil foundation.