Salt scaling resistance and microstructure analysis of fly-ash cement-based concrete treated with different surface penetrants
Salt scaling resistance and microstructure analysis of fly-ash cement-based concrete treated with different surface penetrants
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DOI：
10.1016/j.matlet.2021.129999
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发表时间：
2021-08
影响因子：
3
通讯作者：
Y. Kuang;Naoto Takashima;Y. Sakoi;Meng Zhang;Seiji Zyutani;M. Aba;Y. Tsukinaga
中科院分区：
文献类型：
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作者：
Y. Kuang;Naoto Takashima;Y. Sakoi;Meng Zhang;Seiji Zyutani;M. Aba;Y. Tsukinaga
为了增强渗透剂对混凝土表面的养护效果，研究了三种类型的混凝土表面渗透剂(硅酸锂溶液（l型）、硅酸钠溶液（a型）和硅烷（b型）对粉煤灰水泥基混凝土表面的影响。使用了四种不同的剂量。混凝土的初始养护分为水养护和密封养护。并对试件进行了盐冻融试验和压汞孔隙度试验。结果表明：水固化混凝土中孔径大于200 nm的孔隙体积小于密封固化混凝土；水固化混凝土的抗盐垢性能优于密封固化混凝土。确定了渗透剂在不同固化条件下的适用性和最佳用量。a型和b型复合渗透剂表现出优异的抗结垢性能。
To enhance the maintenance effect of penetrants on concrete surfaces, the impact of three types of concrete surface penetrants (lithium silicate solution (Type-L), sodium silicate solution (Type-A), and silane (Type-B)) applied on fly-ash cement-based concrete surfaces was studied. Four different dosages were used. The initial curing of concrete included water-curing and seal-curing. The salt freeze-thaw experiment and mercury intrusion porosimetry (MIP) experiment were conducted using the specimens. The results showed that the pore volume with a pore diameter above 200 nm in water-cured concrete was lower than that in seal-cured concrete. The salt-scaling resistance was also more optimal for the water-cured concrete compared with the seal-cured concrete. The applicability of penetrants under different curing conditions and the most appropriate dosages were determined. The Type-A and Type-B composite penetrants exhibited an excellent scaling resistance.