滩涂光伏电站软基原位加固用胶凝材料的固化性

2.哈尔滨工业大学 土木工程学院，黑龙江 哈尔滨  150090）

    摘要：以矿渣、钢渣、脱硫灰和水泥为主要原料的新型胶凝材料用于滩涂地区软基原位加固。研究了水灰比、胶凝材料与干土质量比对固化土性能的影响，并探讨了胶凝材料的固化机理。结果表明，水固比为0.5时，所制备固化土试样的抗压强度和软化系数均随胶凝材料与干土质量比的减小而降低，当胶凝材料与干土质量比≥1∶4时，试样28 d抗压强度≥3.7 MPa，软化系数>0.85。胶凝材料以其水化产物形成三维网状骨架固化淤泥质土。

    关键词：胶凝材料；固化土；抗压强度；软化系数；固化机理

    中图分类号：TU411        文献标识码：A        文章编号：1001-702X（2018）07-0016-04

 

The curing property of in situ reinforced cementing materials for soft foundation in

tidal-flat photovoltaic power station

WU You1，FAN Chuangang1，DENG Xiangong1，PEI Lizhai1，LING Xianzhang2

（1.School of Materials Science and Engineering，Anhui University of Technology，Maanshan 243002，China；

 2.School of Civil Engineering，Harbin Institute of Technology，Harbin 150090，China）

    Abstract：In situ reinforced cementing materials for soft foundation in tidal-flat photovoltaic power station were prepared using mineral slag，steel slag，cement and the desulfurization ash as raw materials. The effects of water/cement ratio and cementing material/dry soil ratio on the properties of solidified soil were investigated，and the curing mechanism of cementing materials was discussed. The results showed that compressive strength and softening coefficient of the solidified soil samples with an optimal water solid ratio of 0.5 were decreased with decreasing the cementing material/dry soil ratio. When the ratio of cementing material to dry soil was more than 1∶4，the compressive strength and softening coefficiency of the solidified soil with curing 28 d were respectively greater than 3.7 MPa and 0.85. The solidified soil was formed via a three-dimensional skeleton of hydration product of cementing material.

    Key words：cementing material，solidified soil，compressive strength，softening coefficiency，curing mechanism