A 3D petrographic analysis for concrete freeze-thaw protection
A 3D petrographic analysis for concrete freeze-thaw protection
复制标题
混凝土冻融保护的 3D 岩相分析
DOI：
10.1016/j.cemconres.2019.105952
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发表时间：
2020
影响因子：
11.4
通讯作者：
D. Lange
中科院分区：
文献类型：
--
作者：
Yu Song;Robbie M. Damiani;Chuanyue Shen;Daniel I. Castaneda;D. Lange
岩相分析通常用于测量空隙率参数，以预测混凝土的冻融耐久性。从抛光混凝土截面获得的1D或2D测量值用于推断膏体的3D保护。由于截面视图中的任意点可能部分地被未被填充的空气空隙保护，因此提出了一种体视模型来考虑填充和未填充的空隙。该模型进行了测试与一组不同的空气夹带，配合比，骨料类型的混凝土混合物。与2D分析相比，该3D分析指示更高百分比的水泥浆被保护。当将保护范围等同于Powers的间隔因子时，发现大约98%的糊剂在3D中受到保护。这项研究的结果也与其他作者使用数值模拟和计算机断层扫描获得的结果一致。该模型提供了一个现实的混凝土冻融评估。
Petrographic analysis is routinely implemented to measure air void parameters for predicting freeze-thaw durability of concrete. The 1D or 2D measurements obtained from polished concrete sections are used to infer 3D protection of the paste. Since an arbitrary point in a section view may be partially protected by air voids that are not intersected, a stereological model is proposed to consider both intersected and un-intersected voids. The model is tested with a group of concrete mixtures with varying air entrainment, mix proportion, and aggregate type. As compared with the 2D analysis, this 3D analysis indicates a higher percent of cement paste being protected. When equating the protection range to Powers' spacing factor, it is found that roughly 98% of paste is protected in 3D. Findings in this study also align with results obtained by other authors using numerical simulation and computed tomography. This model offers a realistic concrete freeze-thaw assessment.
影响因子：
11.4
作者：
H. Wong;A. Pappas;R. Zimmerman;N. Buenfeld
通讯作者：
H. Wong;A. Pappas;R. Zimmerman;N. Buenfeld