Effect of magnesium on the C-S-H nanostructure evolution and aluminate phases transition in cement-slag blend
Effect of magnesium on the C-S-H nanostructure evolution and aluminate phases transition in cement-slag blend
复制标题
镁对水泥-矿渣掺混物中C-S-H纳米结构演化和铝酸盐相变的影响
DOI:
10.1007/s11595-018-1794-z
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发表时间:
2018-01
期刊:
影响因子:
--
通讯作者:
侯东帅
中科院分区:
文献类型:
--
作者:
丁庆军;杨军;张高展;侯东帅
The microstructural study was conducted on cement and cement-slag pastes immersed in different concentrations of Mg(NO3)2 solutions utilizing 29Si, 27Al NMR spectroscopy and XRD techniques. The results show that the hydration of both the cement and cement-slag pastes is delayed when the pastes are cured in Mg(NO3)2 solutions as compared to the pastes cured in water. Moreover, Mg2+ ions also exhibit an decalcifying and dealuminizing effect on the C-A-S-H in cement and cement-slag pastes, and thereby decrease Ca/Si and Al[4]/Si ratios of the C-A-S-H. The dealuminization of C-A-S-H is mitigated for cement-slag paste as compared to pure cement paste. The depolymerized calcium and aluminum ions from C-A-S-H gel mainly enter the pore solution to maintain the pH value and form Al[6] in TAH, respectively. On the other hand, Mg2+ ions exert an impact on the intra-transition between Al[6] species, from AFm and hydrogarnet to hydrotalcite-like phase. NO3- ions are interstratified in the layered Mg-Al structure and formed nitrated hydrotalcite-like phase (Mg1-xAlx(OH)2(NO3)x•nH2O). Results from both 27Al NMR and XRD data show that ettringite seems not to react with Mg2+ ions.
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影响因子:
8.6
作者:
Z. Xu;H. Zeng
通讯作者:
Z. Xu;H. Zeng
DOI:
--
发表时间:
2014
期刊:
Journal of Wuhan University of Technology
影响因子:
--
作者:
Wang Zhi-lian
通讯作者:
Wang Zhi-lian
影响因子:
4.5
作者:
BROUGH, AR;DOBSON, CM;GROVES, GW
通讯作者:
GROVES, GW
影响因子:
11.4
作者:
Sun, GK;Young, JF;Kirkpatrick, RJ
通讯作者:
Kirkpatrick, RJ
影响因子:
7.4
作者:
Fernández-Jimenez, A;de la Torre, AG;Aranda, MAG
通讯作者:
Aranda, MAG