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1、第 45 卷第 3 期2014 年 3 月中南大学学报(自然科学版)Journal of Central South University (Science and Technology)Vol.45 No.3Mar. 2014新型 CVC 固化剂固化淤泥结构表征与路用性能王朝辉 1，赵娟娟 1，曾伟 2，王新岐 2，狄升贯 2(1. 长安大学 公路学院，陕西 西安，710064；2. 天津市市政工程设计研究院，天津，300051)摘要：将蛭石作为改性剂应用于淤泥固化处治，并添加水泥、生石灰等材料，制备出一种新型 CVC 固化剂。借助 TEM 试验、FTIR 试验和
2、 XRD 试验，全面分析了 CVC 固化淤泥时发挥功能的微观机理；基于击实试验、加州承载比试验和无侧限抗压强度试验，确定了固化剂的最佳配比；采用抗压回弹模量试验、耐水试验和抗冻融试验评价了固化淤泥的路用性能。结果表明：蛭石粉可均匀分散在淤泥土中，增强淤泥内部稳定性；蛭石可有效提高淤泥的最佳含水量，添加水泥和生石灰可有效弥补蛭石引起的强度损失；CVC 固化剂的最佳配比为 8%水泥+4%蛭石+3%生石灰；CVC 固化剂对淤泥路用性能改善效果较优，具有较强实用价值和应用前景；关键词：CVC 固化剂；淤泥；微观机理；路用性能中图分类号：U414.1文献标志码：A文章编号：1
3、672−7207(2014)03−0917−08Microstructures and road performance ofsilt stabilized by new CVC stabilizerWANG Chaohui1, ZHAO Juanjuan1, ZENG Wei2, WANG Xinqi2, DI Shengguan2(1. School of Highway, Chang’an University, Xi’an 710064, China;2. Tianjin Municipal Engineering Design & Research Insti
4、tute, Tianjin 300051, China)Abstract: To improve the optimum water content of silt and overcome the difficulty of compaction when silt is used inhighway subgrade engineering, the stabilizer named as CVC was prepared by mixing cement, vermiculite and quick lime.The microstructures of stab
5、ilizer and stabilized silt were characterized by transmission electron microscope (TEM),fourier transform infrared spectroscopy (FTIR) and X-Ray diffraction (XRD). Through compaction test, Californiabearing ratio test (CBR) and unconfined compressive test, the most appropriate compositio
6、n of CVC stabilizer weredetermined. Based on this, compression modulus of resilience test, water resistance test, freezing and thawing test werecarried out to evaluate the road performance of the stabilized silt. The results show that vermiculite can disperse evenlyand forms a stable str
7、ucture with silt. The water in silt can be absorbed effectively by vermiculite, and the loss of strengthcaused by vermiculite can be made up with the adding of cement and quick lime, and finally the properties of thestabilized silt are improved. The optimum proportion of
