Anisotropic Compressive Behaviour of Concrete from Slabs Damaged by Alkali-Silica Reaction
Anisotropic Compressive Behaviour of Concrete from Slabs Damaged by Alkali-Silica Reaction
复制标题
碱硅反应损伤板混凝土的各向异性压缩行为
DOI：
10.1016/j.conbuildmat.2020.120377
复制
发表时间：
2020
影响因子：
7.4
通讯作者：
L. C. Hoang
中科院分区：
文献类型：
--
作者：
S. Hansen;L. C. Hoang
本文通过文献综述和试验研究，探讨了ASR损伤混凝土板中混凝土抗压强度和刚度的各向异性。使用数字图像相关（DIC），变形和裂纹扩展密切监测和分析。结果表明：（i）竖向抗压强度和刚度低于水平抗压强度和刚度;（ii）竖向强度和刚度的降低主要是由于水平ASR引起的宏观裂缝的闭合;（iii）水平强度和刚度的降低主要是由于ASR引起的水泥浆体中的微裂缝的存在。研究发现，对ASR损伤板的承载能力和使用性能的评估应基于水平强度和刚度。
This paper investigates the anisotropy of the compressive strength and stiffness of concrete in ASR-damaged concrete slabs through an in-depth literature review and experiments. Using Digital Image Correlation (DIC), deformations and crack propagation are closely monitored and analysed. The results show that: (i) The vertical compressive strength and stiffness are lower than the horizontal; (ii) the reduction of the vertical strength and stiffness is mainly due to closure of the horizontal ASR-induced macro-cracks and; (iii) the reduction of the horizontal strength and stiffness is mainly due to the presence of ASR-induced micro-cracks in the cement paste. It is found that the load-carrying capacity and the serviceability for ASR-damaged slabs should be assessed based on the horizontal strength and stiffness.