Cement and Concrete Composites

2023

DOI: 10.1016/j.cemconcomp.2022.104866

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Effect of elevated Al concentration on early-age hydration of Portland cement

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Cited by 29 publications

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References 49 publications

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“…In the presence of a high alumina phase, the silicate component goes through the following hydration processes to produce [ 20 ]:

…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Three Types of Calcium Sulfate on the Early Hydration and Workability of Self-Compacting Repair Mortar

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et al. 2023

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Despite having a high early mechanical strength and using sulfoaluminate cement as the primary cementitious material, self-compacting repair mortar (SCRM) suffers from rapid hydration rates leading to construction time constraints. This study examined how several forms of calcium sulfate, including hemihydrate gypsum, anhydrite, and dihydrate gypsum, affected SCRM’s workability, hydration process, and microstructure. The outcomes demonstrated that adding hemihydrate gypsum sped up SCRM’s early hydration rate and boosted its expansion rate. For a cement with 8% hemihydrate gypsum, 6 h after adding the water, the flexural strength and compressive strength increased by 39.02% and 34.08%, respectively. The hydration rate of SCRM can be efficiently delayed by dihydrate gypsum, although the result is subpar. The material exhibited the lowest fluidity loss in 20 min, the setting time was extended, and the 28-day flexural and compressive strengths were raised by 26.56% and 28.08%, respectively, after adding 8 percent anhydrite.

“…In the presence of a high alumina phase, the silicate component goes through the following hydration processes to produce [ 20 ]:

…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Three Types of Calcium Sulfate on the Early Hydration and Workability of Self-Compacting Repair Mortar

¹

,

²

,

et al. 2023

View full text Add to dashboard Cite

Despite having a high early mechanical strength and using sulfoaluminate cement as the primary cementitious material, self-compacting repair mortar (SCRM) suffers from rapid hydration rates leading to construction time constraints. This study examined how several forms of calcium sulfate, including hemihydrate gypsum, anhydrite, and dihydrate gypsum, affected SCRM’s workability, hydration process, and microstructure. The outcomes demonstrated that adding hemihydrate gypsum sped up SCRM’s early hydration rate and boosted its expansion rate. For a cement with 8% hemihydrate gypsum, 6 h after adding the water, the flexural strength and compressive strength increased by 39.02% and 34.08%, respectively. The hydration rate of SCRM can be efficiently delayed by dihydrate gypsum, although the result is subpar. The material exhibited the lowest fluidity loss in 20 min, the setting time was extended, and the 28-day flexural and compressive strengths were raised by 26.56% and 28.08%, respectively, after adding 8 percent anhydrite.

Valorization of waste pond ash in cement mortars and prediction of mechanical properties by simple linear regression

Sharma,

Vyas

2024

J Mater Cycles Waste Manag

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A comprehensive morphology study on the carbon nanotube agglomerations in cementitious composite

Lai,

Li,

Wang

et al. 2024

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No abstract

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