Influence of NaCl concentrations on the crack-sealing behavior of superabsorbent polymers in cementitious materials
Influence of NaCl concentrations on the crack-sealing behavior of superabsorbent polymers in cementitious materials
复制标题
NaCl浓度对胶凝材料中高吸水性聚合物裂缝封闭行为的影响
DOI：
10.1016/j.conbuildmat.2020.118228
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发表时间：
2020-05
影响因子：
7.4
通讯作者：
Ji Hongguang
中科院分区：
文献类型：
--
作者：
Yang Haitao;Liu Juanhong;Jia Xinshan;Zhou Yucheng;Ji Hongguang
高吸水性聚合物（SAP）在高浓度NaCl溶液中的裂缝密封行为尚不清楚。采用自行设计的浸泡试验和透水性试验，分析了NaCl浓度对SAP填充面积（S）和密封效率（r）的影响。此外，一个单一的SAP颗粒的三维形貌和SAP对愈合砂浆在NaCl溶液中的影响进行了研究。结果表明，在低浓度NaCl溶液中，SAP的S值和there值几乎不变，但它们随着浓度的增加而减小，直到浓度达到临界值。此外，SAP在实际裂缝中的封缝能力弱于人工裂缝。此外，SAP可以促进砂浆在湿-干（0.5 M NaCl）循环中的愈合。愈合产物主要为CaCO 3和C-S-H凝胶。
The crack-sealing behavior of superabsorbent polymers (SAPs) in high-concentration NaCl solutions is unclear. In this study, the influences of NaCl concentrations on the filled area (S) and sealing efficiency (r) of SAPs were, respectively, analyzed with a self-designed soaking test and a water permeability test. Furthermore, the 3D morphologies of a single SAPs particle and the effects of SAPs on the healing of mortars in NaCl solutions were investigated. The results indicate that theSvalue and thervalue of SAPs are almost constant in low-concentration NaCl solutions, whereas they decrease with an increasing concentration until the concentration reaches the critical value. Additionally, the crack-sealing capacity of SAPs in realistic cracks is weaker than that in artificial cracks. Moreover, SAPs can promote the healing of mortar in wet-dry (0.5 M NaCl) cycles. The healing products are mainly CaCO3and C-S-H gel.
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影响因子：
11.4
作者：
Huang, Haoliang;Ye, Guang;Damidot, Denis
通讯作者：
Damidot, Denis
影响因子：
7.4
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Chahal, Navneet;Siddique, Rafat
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11.4
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Min-hong Zhang;O. Gjørv
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通讯作者：
Schroefl, Christof
影响因子：
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作者：
Justs, J.;Wyrzykowski, M.;Lura, P.
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Lura, P.