Mechanical properties and durability characteristics of polymer- and cement-based repair materials
Mechanical properties and durability characteristics of polymer- and cement-based repair materials
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DOI：
10.1016/s0958-9465(02)00092-6
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发表时间：
2003-05-01
影响因子：
10.5
通讯作者：
Ibrahim, M
中科院分区：
文献类型：
--
作者：
Al-Zahrani, MM;Maslehuddin, M;Ibrahim, M
本研究旨在评估九种聚合物基和水泥基修补砂浆的力学性能和耐久性特征。研究了诸如抗压、抗拉和抗弯强度、弹性模量、收缩和热膨胀等力学性能。通过测量以下方面来评估修补材料的耐久性特征：（i）氯离子渗透性，（ii）电阻率和（iii）碳化深度。所选修补砂浆的力学性能彼此之间差异不是非常显著。聚合物基修补砂浆的弹性模量小于水泥基修补砂浆的弹性模量。这将导致前者修补砂浆相较于后者干燥收缩裂缝减少。聚合物基修补砂浆的电阻率大于水泥基修补砂浆的电阻率。在氯离子渗透性数据中未发现这种趋势。根据ASTM C 1202标准，所有修补材料的氯离子渗透性都非常低。在一些聚合物基修补砂浆中发现碳化增强。（C）2002爱思唯尔科学有限公司。保留所有权利。
This study was conducted to evaluate the mechanical properties and durability characteristics of nine polymer- and cement-based repair mortars. Mechanical properties, such as compressive, tensile and flexural strength, elastic modulus, shrinkage and thermal expansion were studied. The durability characteristics of the repair materials were evaluated by measuring: (i) chloride permeability, (ii) electrical resistivity and (iii) carbonation depth. The mechanical properties of the selected repair mortars did not vary very significantly from each other. The elastic modulus of the polymer-based repair mortars was less than that of the cement-based repair mortars. This will lead to a reduced drying shrinkage cracking in the former repair mortars compared to the latter. The electrical resistivity of polymer-based repair mortars was more than that of cement-based repair mortars. Such a trend was not noted in the chloride permeability data. The chloride permeability in all the repair materials was very low according to ASTM C 1202 criteria. Enhanced carbonation was noted in some of the polymer-based repair mortars. (C) 2002 Elsevier Science Ltd. All rights reserved.