Adsorption behaviour of sulfate in early cement hydration
Source abstract
Abstract
This paper investigates the adsorption behaviour of sulfate on calcium-silicate-hydrate (C-S-H) gel, which is significantly related to cement hydration and delayed ettringite formation. Aqueous sulfate solution from cement paste and prepared calcium-silicate-hydrate samples are used to take other ions and cement hydration into account. The effects of gypsum content, temperature and alkalinity on dissolution and adsorption behaviours of sulfate in cement paste are studied. The results show that higher gypsum content leads to more sulfate ions adsorbed on samples. Sulfate adsorption on calcium-silicate-hydrate samples increases with temperature elevation, which is in agreement with both Divet's and Škapa's results, which used relatively simple calcium-silicate-hydrate–sulfates systems. Higher alkalinity is unfavourable for sulfate ions adsorbed on calcium-silicate-hydrate samples. An alternative opinion was given by Divet and Randriambololona whose result is complex and not representative owing to the adsorption behaviour of sodium ions being neglected.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Concrete and Cement Materials Research · Concrete Properties and Behavior · Building materials and conservation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
PhD candidate, College of Materials Science and Engineering, Chongqing University, Chongqing, China
Professor, College of Materials Science and Engineering, Chongqing University, Chongqing, China
Associate Professor, College of Materials Science and Engineering, Chongqing University, Chongqing, China
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