Effect of particle size distribution on the pre-hydration, hydration kinetics, and mechanical properties of calcium sulfoaluminate cement

被引：8
|
作者：
Lv, Leyang [1 ]
Luo, Shitao [1 ]
Savija, Branko [2 ]
Zhang, Hongzhi [3 ]
Li, Lin [4 ]
Ueda, Tamon [1 ]
Xing, Feng [1 ]
机构：
[1] Shenzhen Univ, Coll Civil & Transportat Engn, Shenzhen Key Lab Low Carbon Construct Mat & Techno, Shenzhen 518060, Peoples R China
[2] Delft Univ Technol, Fac Civil Engn & Geosci, Microlab, Stevinweg 1, NL-2628 CN Delft, Netherlands
[3] Shandong Univ, Sch Qilu Transportat, Jinan 25000, Peoples R China
[4] St Gobain Res Shanghai Co Ltd, Shanghai 200245, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2023年 / 398卷
关键词：
Calcium sulfoaluminate cement; Particle size distribution; Pre-hydration; X-RAY; YEELIMITE; PERFORMANCE; FINENESS; GYPSUM; WATER; PREHYDRATION; ANHYDRITE; STRENGTH; DENSITY;
D O I：
10.1016/j.conbuildmat.2023.132497
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The particle size distribution (PSD) has a significant influence on the fresh and final properties of cement and its derived products. In this paper, CSA cements with three different mean diameters (D50), ranging from 6.04 to 26.62 & mu;m were prepared by milling. The pre-hydration behavior was quantitatively analyzed, including the degree of pre-hydration, the dynamic change of mineral assemblage and the morphology of the prepared CSA cement exposed to 57%, 75% and 97% relative humidities (RHs) for up to 90 days. Hydration kinetics, porosity, and compressive strength of the cement paste made with fresh and pre-hydrated CSA cement with different PSD were also characterized. The results show that pre-hydration of CSA cement at RH higher than 75% has detrimental effects on the hydraulic activity and strength gain of CSA cement. However, coarser CSA cement (D50 = 26.62 & mu;m) does not only show better resistance to pre-hydration, but also higher compressive strength and lower porosity.
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页数：13
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