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土壤固化用特种砂浆的物理力学性能研究
作者：张海旭1，2，张国防1，2，王博1，2，王培铭1，2
（1.同济大学 先进土木工程材料教育部重点实验室，上海 201804；2.同济大学 材料科学与工程学院，上海 201804）
摘要：针对土壤固化处理要求，利用不同激发剂制备土壤固化专用特种砂浆，研究了特种砂浆的物理力学性能及其土壤固化效果。结果表明，固定激发剂掺量情况下，几种土壤固化专用特种砂浆均具有良好的物理力学性能和土壤固化作用；其中以硫酸钠为激发剂的特种砂浆综合性能较佳，具体表现为流动度较大、凝结时间略长、抗折和抗压强度最高，土壤固化效果最好，固化土强度发展快，且28 d无侧限抗压强度最高。
关键词：土壤固化用特种砂浆；激发剂；物理力学性能；无侧限抗压强度
中图分类号：TU472 文献标识码：A 文章编号：1001-702X（2020）07-0001-03
Study on physical and mechanical properties of cement mortar special for soil solidification
ZHANG Haixu1，2，ZHANG Guofang1，2，WANG Bo1，2，WANG Peiming1，2
（1.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education，Tongji University，Shanghai 201804，China；
2.School of Materials Science and Engineering，Tongji University，Shanghai 201804，China）
Abstract：In order to solidify soil，several special cement mortars modified with different activators were prepared，and their physical and mechanical properties and soil solidification effects were studied. The results show that with the constant dosage of activator，special cement mortars all have good properties and soil solidification ability. Comparatively，the cement mortar with sodium sulfate as activator assumes better comprehensive performances，which are characterized by higher fluidity，longer setting time，higher flexural strength and compressive strength，the best soil solidification effect with the fast strength development of solidified soil and the highest unconfined compressive strength at 28 d.
Key words：special cement mortar for soil solidification，activator，physical and mechanical properties，unconfined compressive strength