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Discussion of the paper “Effect of the chemical composition of synthetic alkali-silica gels on their structure, swelling behavior and water uptake” by Miriam E. Krüger, Harald Hilbig, Ludwig Stelzner and Alisa Machner, Cem. Conc. Res. 184 (2024): 107596
Cement and Concrete Research ( IF 10.9 ) Pub Date : 2024-12-29 , DOI: 10.1016/j.cemconres.2024.107778
Andreas Leemann

In the discussed study, synthesized ASR products of unknown internal relative humidity (RH) were brought into contact with water using the osmotic cell test. They were not conditioned to an identical RH corresponding to the one of ASR affected concrete before the test. Moreover, swelling and osmotic pressure depend on the difference in the ionic concentration between two solutions. ASR products formed in reactive concrete aggregates are only exposed to the pore solution of the concrete and not to water. Using water in an osmotic cell test leads to results that are not representative for ASR in concrete.

中文翻译:


讨论了 Miriam E. Krüger、Harald Hilbig、Ludwig Stelzner 和 Alisa Machner 的论文“合成碱硅胶的化学成分对其结构、溶胀行为和水分吸收的影响”,Cem. Conc. Res. 184 (2024):107596



在讨论的研究中,使用渗透池测试使未知内部相对湿度 (RH) 的合成 ASR 产物与水接触。他们没有被条件设置为与测试前 ASR 受影响的混凝土相对应的相同 RH。此外,溶胀和渗透压取决于两种溶液之间的离子浓度差异。在反应性混凝土骨料中形成的 ASR 产品仅暴露在混凝土的孔隙溶液中,而不暴露在水中。在渗透池测试中使用水会导致结果不代表混凝土中的 ASR。
更新日期:2024-12-29
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