Linking reactivity test outputs to properties of cementitious pastes made with supplementary cementitious materials
Linking reactivity test outputs to properties of cementitious pastes made with supplementary cementitious materials
复制标题
将反应性测试输出与辅助胶凝材料制成的水泥浆的性能联系起来
DOI：
10.1016/j.cemconcomp.2020.103742
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发表时间：
2020
影响因子：
10.5
通讯作者：
P. Suraneni
中科院分区：
文献类型：
--
作者：
S. Ramanathan;Mahipal Kasaniya;Montale Tuen;M. Thomas;P. Suraneni
最近开发的辅助胶凝材料（SCM）的反应性测试已经显示出区分惰性和反应性材料的能力。两个有前途的SCM反应性测试被用来研究十种不同的SCM。第一种方法涉及量化的热释放，结合水，和氢氧化钙消耗的SCM在模拟孔溶液（修改R3测试），和第二种方法是石灰强度测试，量化石灰砂浆强度的发展。对具有20%SCM置换水平的水泥浆体进行了35天的测试，以确定热释放、氢氧化钙含量、结合水、抗压强度和体积电阻率。结果表明，改良R3在第10天和第1天的放热率以及与结合水的关系均呈中等程度的相关性，这表明可以缩短试验时间，用结合水代替放热率。从改进的R3测试测量的氢氧化钙消耗与SCM中的CaO含量密切相关，并且与35天时的膏体电阻率适度相关，这证明了测量氢氧化钙消耗的根本重要性。修改后的R3热释放和结合水和大多数其他糊剂的性能之间的相关性一般较差，大概是因为在修改后的R3测试的高加速度。从石灰强度测试测量的抗压强度显示出中等至强的相关性，在1-35天的热释放，氢氧化钙含量，结合水，和体积电阻率的水泥浆。因此，这些反应性试验的根本重要性得到了明确的验证。
Recently developed reactivity tests for supplementary cementitious materials (SCMs) have shown the ability to differentiate between inert and reactive materials. Two promising SCM reactivity tests were used to study ten different SCMs. The first method involves quantifying the heat release, bound water, and calcium hydroxide consumption of SCMs in a simulated pore solution (modified R3test), and the second method is a lime strength test that quantifies lime mortar strength development. Tests on cementitious pastes with a 20% SCM replacement level were conducted to determine heat release, calcium hydroxide content, bound water, compressive strength, and bulk resistivity for 35 days. Moderate correlations between the modified R3heat release at 10 days and 1 day and between modified R3heat release and bound water were shown, which suggests the possibility of reducing test duration and using bound water, instead of the heat release. The calcium hydroxide consumption measured from the modified R3test correlates strongly with CaO content in the SCM and moderately to paste bulk resistivity at 35 days, demonstrating the fundamental importance of measuring calcium hydroxide consumption. Correlations between modified R3heat release and bound water and most other paste properties were generally poor, presumably because of the high acceleration in the modified R3tests. The compressive strength measured from the lime strength test showed moderate to strong correlation to heat release, calcium hydroxide content, bound water, and bulk resistivity of cementitious paste at 1–35 days. The fundamental importance of these reactivity tests is therefore clearly validated.
影响因子：
3.9
作者：
Lapeyre, Jonathan;Kumar, Aditya
通讯作者：
Kumar, Aditya