当前位置:
X-MOL 学术
›
Cem. Concr. Res.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Effects of Al in C–A–S–H gel on the chloride binding capacity of blended cement paste
Cement and Concrete Research ( IF 10.9 ) Pub Date : 2025-01-30 , DOI: 10.1016/j.cemconres.2025.107805
Tiao Wang, Yuqian Zheng, Hao Qian, Zhenguo Shi, Satya Medepalli, Jin Zhou, Fuqiang He, Tetsuya Ishida, Dongshuai Hou, Gaozhang Zhang, Zhengwu Jiang, Zhengning Zhou, Wei Zhang
Cement and Concrete Research ( IF 10.9 ) Pub Date : 2025-01-30 , DOI: 10.1016/j.cemconres.2025.107805
Tiao Wang, Yuqian Zheng, Hao Qian, Zhenguo Shi, Satya Medepalli, Jin Zhou, Fuqiang He, Tetsuya Ishida, Dongshuai Hou, Gaozhang Zhang, Zhengwu Jiang, Zhengning Zhou, Wei Zhang
This study quantitatively examines the impact of aluminum (Al) in C–A–S–H gel2 In cement notation for oxides, C = CaO, S = SiO2 , A = Al2 O3 , H = H2 O, and F = Fe2 O3 . C–(A)–S–H gel represents both calcium–silicate–hydrate (C–S–H) and aluminum-incorporated calcium–silicate–hydrate (C–A–S–H) gels in this study. 2 on the chloride binding capacity of blended cement paste containing supplementary cementitious materials (SCMs). The experimental results show that Al incorporation does not influence the physical chloride binding of C–A–S–H gel, which is governed by its Ca/Si ratio. However, in the presence of Cl− ions, the OH− ligands that stabilize high-coordination AlVI species3 Superscripted Roman numerals represent the number of oxygen atoms in Si and Al species. 3 (specifically [AlO₂(OH)₄]5− ) can be replaced by Cl− ions. This replacement leads to the leaching of AlVI species from the C–A–S–H gel and an increase in OH− ion concentration in the solution. The released Al3+ ions then interact with Ca2+ and Cl− ions in the pore solution to form Friedel's salts (Fs), which further promotes the leaching of AlVI species. Consequently, the chemical chloride binding capacity of the cement paste increases as the Al/Si ratio of the C–A–S–H gel rises, along with refinements in paste microstructure.
中文翻译:
C–A–S–H 凝胶中 Al 对混合水泥浆氯化物结合能力的影响
本研究定量研究了铝 (Al) 在 C-A-S-H 凝胶中的影响2在氧化物的水泥符号中,C = CaO,S = SiO2,A = Al2O3,H = H2O 和 F = Fe2O3。在本研究中,C-(A)-S-H 凝胶代表了钙-硅酸盐-水合物 (C-S-H) 和铝掺入钙-硅酸盐-水合物 (C-A-S-H) 凝胶2,关于含有补充胶凝材料 (SCM) 的混合水泥浆的氯化物结合能力。实验结果表明,Al 掺入不会影响 C-A-S-H 凝胶的物理氯化物结合,该结合受其 Ca/Si 比率控制。然而,在 Cl− 离子存在的情况下,稳定高配位 AlVI 种类的 OH− 配体3 上标罗马数字代表 Si 和 Al 种类中的氧原子数.3(特别是 [AlO₂(OH)₄]5−)可以被 Cl− 离子取代。这种取代导致 AlVI 物质从 C-A-S-H 凝胶中浸出,并增加溶液中的 OH− 离子浓度。然后,释放的 Al3+ 离子与孔隙溶液中的 Ca2+ 和 Cl− 离子相互作用,形成弗里德尔盐 (Fs),从而进一步促进 AlVI 物质的浸出。因此,随着 C-A-S-H 凝胶的 Al/Si 比的升高,以及浆料微观结构的细化,水泥浆的化学氯化物结合能力增加。
更新日期:2025-01-30
中文翻译:

C–A–S–H 凝胶中 Al 对混合水泥浆氯化物结合能力的影响
本研究定量研究了铝 (Al) 在 C-A-S-H 凝胶中的影响2在氧化物的水泥符号中,C = CaO,S = SiO2,A = Al2O3,H = H2O 和 F = Fe2O3。在本研究中,C-(A)-S-H 凝胶代表了钙-硅酸盐-水合物 (C-S-H) 和铝掺入钙-硅酸盐-水合物 (C-A-S-H) 凝胶2,关于含有补充胶凝材料 (SCM) 的混合水泥浆的氯化物结合能力。实验结果表明,Al 掺入不会影响 C-A-S-H 凝胶的物理氯化物结合,该结合受其 Ca/Si 比率控制。然而,在 Cl− 离子存在的情况下,稳定高配位 AlVI 种类的 OH− 配体3 上标罗马数字代表 Si 和 Al 种类中的氧原子数.3(特别是 [AlO₂(OH)₄]5−)可以被 Cl− 离子取代。这种取代导致 AlVI 物质从 C-A-S-H 凝胶中浸出,并增加溶液中的 OH− 离子浓度。然后,释放的 Al3+ 离子与孔隙溶液中的 Ca2+ 和 Cl− 离子相互作用,形成弗里德尔盐 (Fs),从而进一步促进 AlVI 物质的浸出。因此,随着 C-A-S-H 凝胶的 Al/Si 比的升高,以及浆料微观结构的细化,水泥浆的化学氯化物结合能力增加。