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电阻率法是一种有效的固化土质量评价与检测方法,且具有快捷、无损且可连续测试等优点。为了评价固化土电阻率发展规律与主要影响因素,进行水泥、高炉矿渣+石灰、粉煤灰+石灰3种固化剂加固黏性土的室内试验,分析固化土电阻率随固化剂掺入量和养护龄期等的变化规律。试验结果表明,固化土电阻率随着固化剂掺入量的增加近似线性增加;随着养护龄期的增加,电阻率也随之增加,但其增长速率逐渐降低。提出一个能够描述固化剂掺入量、养护龄期、固化土孔隙率及饱和度等因素对固化土电阻率影响规律的综合参数,采用综合参数替代Archie电阻率模型中的孔隙率即可将Archie电阻率模型推广应用到固化土中。
Resistivity method is an effective method for soil quality assessment and testing, and has the advantages of fast, nondestructive and continuous testing. In order to evaluate the rule of development of resistivity of cured soil and its main influencing factors, indoor tests of cement, clay with blast furnace slag + lime, fly ash + lime were carried out to analyze the relationship between the resistivity of cured soil and the amount of curing agent Conservation age and other changes. The experimental results show that the resistivity of cured soil increases linearly with the increase of curing agent. With the increase of curing age, the resistivity also increases, but the growth rate decreases gradually. A comprehensive parameter that can describe the effect of curing agent incorporation, curing age, porosity and saturation of cured soil on the resistivity of cured soil is presented. Archie’s Archie resistivity model can be replaced by a comprehensive parameter to replace Archie Resistivity model to promote the application of curing soil.