Study on the Influence of Minor Constituents in Blast Furnace Slag Rich Cement on the Thermal and Mechanical Properties of Concrete
Study on the Influence of Minor Constituents in Blast Furnace Slag Rich Cement on the Thermal and Mechanical Properties of Concrete
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DOI：
10.3151/jact.17.46
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发表时间：
2019-01
影响因子：
2
通讯作者：
T. Mizobuchi;K. Ishizeki;T. Sagawa;T. Kanda
中科院分区：
文献类型：
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作者：
T. Mizobuchi;K. Ishizeki;T. Sagawa;T. Kanda
迄今为止，作为富矿渣水泥混凝土粘结剂的次要成分，SO3和碳酸钙对混凝土热性能和力学性能的影响尚不清楚，控制热裂的最佳配比也不是最有效的。为了评估这些次要成分对混凝土温度和抗裂性能的影响，本研究进行了简单的绝热温升试验和热应力试验机（TSTM）测试。简单的绝热温升试验主要评估所研究的次要成分的热特性，而使用TSTM的试验是一种可以模拟真实结构构件内部行为的试验装置，研究了蠕变特性和抗裂性等力学性能。此外，利用简单绝热温升试验和TSTM试验结果，对墙体结构进行热应力分析，以确定次要成分对抗裂性能的影响。因此，在本研究范围内确定，我们发现随着SO3的加入，钙矾石和单硫酸盐的形成对绝热温升特性和表观力学性能都有影响，而碳酸钙的加入对热性能的影响很小。
Until now, the influence on the thermal and mechanical properties of concrete of SO3 and calcium carbonate as minor constituents contained in binder used for concrete made with blast furnace slag rich cement was not clearly known, and neither was the optimum mixing ratio most effective for control of thermal cracking. To evaluate the influence of these minor constituents on the temperature and crack resistance properties of concrete, a simple adiabatic temperature rise test and examination by thermal stress testing machine (TSTM) were carried out in this study. The simple adiabatic temperature rise test evaluated mainly the thermal characteristics of the minor constituents under investigation, while the test using a TSTM, which is a test device that can simulate the behavior inside the member of a real structure, investigated mechanical properties such as creep characteristics, and crack resistance. Further, using the results of the simple adiabatic temperature rise test and the test using a TSTM, thermal stress analysis using a wall structure was carried out to determine the influence of minor constituents on crack resistance. As a result, as determined within the scope of this study, we found that the formation of ettringite and monosulfate accompanying the addition of SO3 has an influence on the adiabatic temperature rise characteristic and the apparent mechanical properties, and that the addition of calcium carbonate has only a small influence on thermal properties.