Investigation on the impact of Thermo-Drying towards Freeze-Thaw cycle processing for recycled coarse aggregate
Investigation on the impact of Thermo-Drying towards Freeze-Thaw cycle processing for recycled coarse aggregate
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DOI：
10.1016/j.conbuildmat.2023.131914
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发表时间：
2023-08
影响因子：
7.4
通讯作者：
F. Gong;Zhao Wang;Yingjie Ning;Liu Yang;Qiang Zeng
中科院分区：
文献类型：
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作者：
F. Gong;Zhao Wang;Yingjie Ning;Liu Yang;Qiang Zeng
由于附着砂浆（AM）的存在，影响其性能，再生粗骨料（RCA）的使用受到限制。为了克服这一限制，人们采用机械和化学技术等传统方法从RCA中去除AM并获得天然骨料（NA）。冻融循环 (FTC) 处理在去除 AM 方面表现出很高的效率，同时对 NA 造成的损害可以忽略不计。本文旨在定量研究热干燥（TD）对 FTC 加工的影响。从微观到宏观的实验数据被用来揭示该过程背后的机制。为了进一步分析TD的影响，建立了理论模型来计算FTC加工过程中AM的应变分布，同时考虑TD的影响。研究结果表明，TD 对 FTC 处理有积极影响。然而，需要综合分析来平衡处理效率和能耗。该分析将有助于开发优化的 TD-FTC 处理方案。
The use of recycled coarse aggregate (RCA) is limited due to the presence of attached mortar (AM), which affects its performance. To overcome this limitation, traditional methods such as mechanical and chemical techniques have been used to remove AM from RCA and obtain natural aggregate (NA). Freeze-thaw cycles (FTC) processing has shown high efficiency in removing AM while causing negligible damage to the NA. This paper aims to investigate the impact of thermo-drying (TD) on the FTC processing quantitatively. The experimental data, ranging from micro- to macro-scale, was used to reveal the mechanism behind the process. To further analyze the impact of TD, a theoretical model was established to calculate the strain distribution of AM during FTC processing while taking into account the influence of TD. The findings suggest that TD has a positive impact on FTC processing. However, an integrated analysis is necessary to balance processing efficiency and energy consumption. This analysis will allow for the development of an optimized TD-FTC processing scheme.