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根据提出的热孔计法表征水泥基材料孔结构方法及其热力学计算模型,研究了测试过程密封性、样品质量、升降温速率等因素对热孔计法测试水泥基材料试验结果的重现性、分辨率或精确性的影响,并比较了热孔计法与氮吸附法两种测试结果的异同。结果表明:当所取样品质量在30mg以上,测试速率控制为1℃/min时,热孔计法降温阶段的测试结果可用于表征水泥基材料孔结构,且与氮吸附测试结果相近。确定了热孔计法测定水泥基材料孔结构的基本测试参数。
According to the proposed method of thermal poremethod to characterize the pore structure of cement-based materials and its thermodynamic calculation model, the reproducibility of test results of the thermal poremethod method for testing cementitious materials was studied, such as the tightness of the test process, the quality of the sample and the rate of heating and cooling. , Resolution or accuracy, and compares the similarities and differences between the two kinds of test results of thermal porometer method and nitrogen adsorption method. The results show that when the sample quality is above 30mg and the test rate is controlled at 1 ℃ / min, the test results of the cooling-hole test can be used to characterize the pore structure of cement-based materials and have similar results with the nitrogen adsorption test. The basic testing parameters of the pore structure of cement-based materials determined by the thermal porometer method were determined.