Time-dependent Effect of Expansion due to Alkali-silica Reaction on Mechanical properties of Concrete
Time-dependent Effect of Expansion due to Alkali-silica Reaction on Mechanical properties of Concrete
复制标题
DOI：
10.3151/jact.19.714
复制
发表时间：
2021-06-01
影响因子：
2
通讯作者：
Takahashi, Yuya
中科院分区：
文献类型：
--
作者：
Ji, Xi;Joo, Hyo Eun;Takahashi, Yuya
研究了碱-硅酸反应(ASR)对混凝土力学性能随时间的变化规律。以往的分析和试验研究表明，ASR凝胶在混凝土裂缝中起到了抗机械损伤的积极作用。为了研究ASR凝胶对开裂混凝土的影响，制备了不同膨胀程度的圆柱体试件，并在不同的材料龄期进行了试验。压缩试验结果表明，随着时间的推移，试件的劣化弹性模量可以得到恢复。收集和评估来自其他ASR研究的机械性能数据，以观察整个文献中类似的趋势。据观察，弹性模数的恢复也发生在先前报道的实验中。弹性模量的恢复被认为是由于填充裂缝的ASR凝胶的随时间变化的化学和物理性质。此外，数据表明，除材料龄期和膨胀外的其他参数可以归因于ASR影响混凝土的随时间变化的力学性能。
This study investigates the time-dependent mechanical properties of concrete deteriorated by the alkali-silica reaction (ASR). Previous analytical and experimental studies have indicated the positive impact of ASR gel in the cracks against mechanical damage in concrete. To study the effects of ASR gel on cracked concrete, groups of cylinder specimens with different expansion levels were prepared and tested at different material ages. The compression test results showed that the deteriorated elastic modulus of the specimens could be recovered over time. Mechanical property data from the other ASR studies were collected and assessed to observe similar trends across the literature. It was observed that the recovery of the elastic modulus also occurred in previously reported experiments. The recovery of the elastic modulus is assumed to be due to the time-dependent chemical and physical properties of ASR gel, which fills the cracks. Moreover, the data indicated that parameters other than material age and expansion could be attributed to the time-dependent mechanical properties of concrete affected by ASR.