低温下n-C-S-H对矿物掺合料-水泥体系水化及增强作用的影响

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

作者信息

Li Wei, Qian Chunxiang, Li Qingchao, Wang Kehan, Zheng Chunyang, Zhang Yanli

机构信息

School of Materials Science and Engineering, Southeast University, Nanjing 211189, China.

Jiangsu ARIT New Materials Co., Ltd., Nanjing 211505, China.

出版信息

Nanomaterials (Basel). 2024 Mar 15;14(6):524. doi: 10.3390/nano14060524.

DOI:10.3390/nano14060524

PMID:38535672

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10975817/

Abstract

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 °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.

摘要

本文研究了纳米硅酸钙水合物（n-C-S-H）对低温养护条件（5℃）下矿物粉-水泥体系早期抗压强度的影响。通过结合XRD、DSC-TG、MIP等技术，分析了不同掺量的n-C-S-H在矿物粉-水泥体系中的水化机理。结果表明，n-C-S-H显著提高了低温养护条件下矿物粉-水泥体系的早期抗压强度，在掺量为1.0%（质量分数）时效果最佳。XRD、DSC-TG和MIP测试表明，n-C-S-H促进了矿物粉水泥的水化，加快了水化产物的生成速率，降低了硬化矿物粉-水泥浆体的孔隙率，提高了体系的密实度。