材料科学
多孔性
计算机断层摄影术
抗压强度
复合材料
压缩(物理)
岩土工程
地质学
医学
放射科
标识
DOI:10.1016/j.coldregions.2018.03.027
摘要
In this study, the deterioration mechanism of concrete subjected to freezing-thawing (F-T) actions was analyzed. The evolution and spatial distribution of internal pore structure were key factors in the damage mechanism and mechanical properties of concrete in the F-T environment. X-ray computed tomography (CT) was used to examine the evolution of concrete internal damage under F-T cycles. CT-identified pore structures were reconstructed as digital virtual-models and the porosity and pore distribution of these pore structures were characterized by image analysis. Three-dimensional printing (3DP) specimens containing CT-identified pore structures were prepared and replicated based on these digital virtual-models. Uniaxial compression tests were conducted on both concrete specimens and 3DP specimens, which have a similar loss percentage of uniaxial compressive strength (UCS). These results show that 3DP technology can provide a new strategy for experimental study of concrete material.
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