Use of different barium salts to inhibit the thaumasite form of sulfate attack in cement-based materials
Use of different barium salts to inhibit the thaumasite form of sulfate attack in cement-based materials
复制标题
使用不同的钡盐抑制水泥基材料中硫酸盐侵蚀的硅灰石形式
DOI：
10.1007/s11595-016-1376-x
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发表时间：
2016-04
影响因子：
1.6
通讯作者：
Ma Baoguo
中科院分区：
文献类型：
--
作者：
Su Ying;Wei Xiaochao;Huang Jian;Wang Yingbin;He Xingyang;Wang Xiongjue;Ma Baoguo
我们研究了不同钡化合物对水泥基材料在砂浆中作为外加剂时抗硫酸盐侵蚀（TSA）的影响。此外，我们还分析了不同类型的钡盐（baco3和Ba(OH)2）对梭马石形成的抑制机制。将对照水泥砂浆和钡盐与水泥和石灰石的质量比分别为0.5%、1.0%和1.5%的砂浆浸泡在5%（重量比）的mgso4溶液中，温度为5℃，模拟TSA。对砂浆样品的外观、质量和抗压强度进行了监测和测量，以评估这些样品的一般降解程度。采用XRD、FTIR和SEM对硫酸盐侵蚀产物进行分析。实验结果表明，在mgso4溶液中固化的砂浆，其降解程度各不相同。然而，钡盐可以极大地抑制这种降解。氢氧化钡在碱性水泥孔隙溶液中的溶解度存在差异，其对TSA的保护效果优于碳酸盐，与几乎完全分解的对照样品相比，这些钡化合物的存在可以降低TSA的程度。
We investigated the effects of different barium compounds on the thaumasite form of sulphate attack (TSA) resistance of cement-based materials when they were used as admixtures in mortars. Moreover, we analyzed the inhibition mechanisms within different types of barium salts, namely BaCO3and Ba(OH)2, on the thaumasite formation. The control cement mortar and mortars with barium salts to cement and limestone weight ratios of 0.5%, 1.0%, and 1.5% were immersed in 5% (by weight) MgSO4solution at 5 °C to mimic TSA. Appearance, mass, and compressive strength of the mortar samples were monitored and measured to assess the general degradation extent of these samples. The products of sulphate attack were further analyzed by XRD, FTIR, and SEM, respectively. Experimental results show that different degradation extent is evident in all mortars cured in MgSO4solution. However, barium salts can greatly inhibit such degradation. Barium in hydroxide form has better effectiveness in protection against TSA than carbonate form, which may be due to their solubility difference in alkaline cement pore solution, and the presence of these barium compounds can reduce the degree of TSA by comparison with the almost completely decomposed control samples.
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影响因子：
11.4
作者：
N. Tsuyuki;R. Watanabe;K. Koizumi;Y. Umemura;Osamu Machinaga
通讯作者：
N. Tsuyuki;R. Watanabe;K. Koizumi;Y. Umemura;Osamu Machinaga
稻壳灰对水泥基材料硫酸盐侵蚀的硅灰石形态的影响
影响因子：
2.9
作者：
Ma Baoguo;Wang Yingbin;Fu Haobing
通讯作者：
Fu Haobing
影响因子：
11.4
作者：
Blanco-Varela, MT;Aguilera, J;Martínez-Ramirez, S
通讯作者：
Martínez-Ramirez, S
影响因子：
11.4
作者：
S. Hartshorn;J. Sharp;R. Swamy
通讯作者：
S. Hartshorn;J. Sharp;R. Swamy
影响因子：
10.5
作者：
Freyburg, E;Berninger, AM
通讯作者：
Berninger, AM