Effect of n-C-S-H on Hydration and Reinforcement of Mineral Powder-Cement System at Low Temperatures

被引：2
|
作者：
Li, Wei [1 ,2 ]
Qian, Chunxiang [1 ]
Li, Qingchao [2 ]
Wang, Kehan [2 ]
Zheng, Chunyang [2 ]
Zhang, Yanli [2 ]
机构：
[1] Southeast Univ, Sch Mat Sci & Engn, Nanjing 211189, Peoples R China
[2] Jiangsu ARIT New Mat Co Ltd, Nanjing 211505, Peoples R China
来源：
NANOMATERIALS | 2024年 / 14卷 / 06期
关键词：
nano-C-S-H; mineral powder-cement system; hydration mechanism; porosity; early compression strength; PORE-SIZE DISTRIBUTION; BLENDED CEMENT; ACCELERATED-GROWTH; STRENGTH;
D O I：
10.3390/nano14060524
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
This paper investigated the effect of nano-calcium silicate hydrate (n-C-S-H) on the early compressive strength of mineral powder-cement systems under low-temperature curing conditions (5 degrees C). The hydration mechanism of n-C-S-H in the mineral powder-cement system at different dosages was analyzed by combining it with XRD, DSC-TG, MIP, and other techniques. The results show that n-C-S-H significantly enhances the early compressive strength of the mineral powder-cement system under low-temperature curing conditions, with optimal results observed at a dosage of 1.0% (mass fraction). The XRD, DSC-TG, and MIP tests reveal that n-C-S-H promotes the hydration of the mineral powder cement, accelerates the generation rate of hydration products, reduces the porosity of the hardened mineral powder-cement slurry, and improves the system's density.
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页数：10
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