Modification on the chloride binding capacity of cementitious materials by aluminum compound addition
Modification on the chloride binding capacity of cementitious materials by aluminum compound addition
复制标题
添加铝化合物对胶凝材料氯离子结合能力的改性
DOI:
10.1016/j.conbuildmat.2019.06.137
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发表时间:
2019-10
影响因子:
7.4
通讯作者:
Xiao Xunguang
中科院分区:
文献类型:
--
作者:
Wang Yunyao;Shui Zhonghe;Gao Xu;Huang Yun;Yu Rui;Xiao Xunguang
This study investigates the effects of aluminum compound on the binding of admixed chloride in cementitious materials. Three commonly available aluminum compounds, aluminum oxide, aluminum hydroxide and colloidal nano-alumina are applied. The bound chloride content, hydration products and calcium hydroxide content are analyzed. The results show that aluminum compounds transform to AFm phases such as carboaluminate, monosulfoaluminate if there is no available chloride. When the mixing water includes chloride, the above AFms transform to chloroaluminate, e.g. Kuzel’s or Friedel’s salt, depending on the sodium chloride and aluminum compound content. The bound chloride content is significantly improved with aluminum compound addition during the whole curing age, even though in an early age of 3 days. Since aluminum compounds react slower than alumina-containing clinker, the bound chloride content of aluminum compound blended pastes experience a considerable increase after 7 days, whereas that for plain paste is very minor. Generally, admixed chloride promotes the formation of delayed ettringite and this effect can be suppressed by aluminum compound addition due to higher amount of formed AFms. A higher dosage of admixed chloride increases the bound chloride content and reduces the calcium hydroxide as well as free water content in the system.
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DOI:
10.5150/jngcgc.2010.095-l
发表时间:
2010
期刊:
--
影响因子:
--
作者:
Jussara Limeira de Araujo;L. A. Fité;M. Larrañaga
通讯作者:
Jussara Limeira de Araujo;L. A. Fité;M. Larrañaga
影响因子:
7.4
作者:
J. Limeira;L. Agulló;M. Etxeberria
通讯作者:
J. Limeira;L. Agulló;M. Etxeberria
DOI:
10.1002/maco.201810169
发表时间:
2018-10
期刊:
Materials and Corrosion
影响因子:
--
作者:
Baihui Shang;Ying Li
通讯作者:
Baihui Shang;Ying Li
影响因子:
11.4
作者:
Thomas, M. D. A.;Hooton, R. D.;Zibara, H.
通讯作者:
Zibara, H.
影响因子:
11.4
作者:
N. B. Singh;V. D. Singh;Sarita Rai;S. Chaturvedi
通讯作者:
N. B. Singh;V. D. Singh;Sarita Rai;S. Chaturvedi