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通过开展不同灰砂质量配比、料浆质量分数和养护龄期条件下的胶结充填体固结全程电阻率和单轴抗压强度试验,对胶结充填体固结全程电阻率特性及其强度的关联性进行研究.基于胶结充填体的等效电路,综合考虑不同龄期的水化反应产物的类型及形态等微观结构影响因素,揭示了胶结充填体固结全程的电阻率变化机制,并推导了其电阻率模型;结合强度测试数据,构建了胶结充填体单轴抗压强度与其电阻率定量关系方程.结果表明:胶结充填体的电阻率具有与养护龄期相同的发展趋势,即电阻率先降至最低点,而后遵循先快后慢的增长规律;灰砂质量配比越小、质量分数越高,其电阻率越大;电阻率的变化规律与其内部微观结构密切相关,根据电阻率曲线发展特点,可将充填体固结全程分为5个阶段;充填体的单轴抗压强度和电阻率增长规律基本一致,且两者间存在明显的对数关系.
Through carrying out the whole resistivity test and the uniaxial compressive strength test of the cemented filling body under the conditions of different ash sand mass ratio, slurry mass fraction and curing age, the whole resistivity characteristic and strength Based on the equivalent circuit of cemented filling body, the influence factors of microstructure such as the type and morphology of hydration reaction products at different ages were comprehensively studied, and the mechanism of resistivity change during consolidation of cemented filling body was revealed and deduced The resistivity model and the test data of bonding strength were used to establish the quantitative equation of the uniaxial compressive strength of cemented filler body and its resistivity.The results show that the resistivity of cemented filler body has the same development trend as that of curing age, To the lowest point, and then follow the growth pattern of fast growth and slow growth; the smaller the proportion of sand and sand, the higher the mass fraction, the greater the resistivity; the variation of resistivity is closely related to its internal microstructure. According to the resistivity curve Development characteristics, the consolidation of the filling body can be divided into five stages; the uniaxial compressive strength and resistivity of the filling body are basically the same, and there is obvious between the two Logarithmic relationship.