Characterisation of a vascular self-healing cementitious material system: Flow and curing properties
Characterisation of a vascular self-healing cementitious material system: Flow and curing properties
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DOI：
10.1016/j.conbuildmat.2020.118332
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发表时间：
2020-06
影响因子：
7.4
通讯作者：
Tharmesh Selvarajoo;R. Davies;D. Gardner;B. Freeman;A. Jefferson
中科院分区：
文献类型：
--
作者：
Tharmesh Selvarajoo;R. Davies;D. Gardner;B. Freeman;A. Jefferson
一系列的表征研究报告，提供了新的数据的行为的自愈合胶凝材料（SHCM）系统。一个“模型”材料系统被选择用于研究，包括氰基丙烯酸酯（CA）填充通道混凝土结构元件。工作的重点是运输和固化性能的愈合剂，与四个独立的研究结果正在提交。实验方案包括CA在静态自然裂缝中的毛细流动行为，愈合剂通过裂缝表面吸附到混凝土试样中，CA固化前沿邻近混凝土基材的发展和进展，以及CA在毛细通道中的动态流动特性。为这些过程中的每一个建立理论关系，这允许确定有意义的参数，帮助确定材料系统的行为。在所有情况下，过程中显示有很大程度的可变性，但同样，表现出强烈的行为趋势。
A series of characterisation studies are reported that provide new data on the behaviour of a self-healing cementitious material (SHCM) system. A ‘model’ material system is selected for study that comprises cyanoacrylate (CA) filled channels in concrete structural elements. The focus of the work is on transport and curing properties of the healing-agent, with the results of four separate studies being presented. The experimental programme encompasses the capillary flow behaviour of CA in a static natural crack, the sorption of healing-agent through a cracked surface into a concrete specimen, the development and progress of a CA curing front adjacent to a concrete substrate and the dynamic flow characteristics of CA in capillary channels. A theoretical relationship is established for each of these processes, which allows meaningful parameters to be determined that help characterise the behaviour of the material system. In all cases, the processes were shown to have a significant degree of variability but, equally, to exhibit strong behavioural trends.