Effects of nanosilica on microstructure and durability of cement-based materials

被引：34

作者：

Fu, Qiang ^{[1
,2
]}

Zhao, Xu ^{[1
]}

Zhang, Zhaorui ^{[1
]}

Xu, Wenrui ^{[1
]}

Niu, Ditao ^{[1
,2
]}

机构：

[1] Xian Univ Architecture & Technol, Sch Civil Engn, Xian 710055, Shaanxi, Peoples R China

[2] Xian Univ Architecture & Technol, State Key Lab Green Bldg Western China, Xian 710055, Shaanxi, Peoples R China

来源：

POWDER TECHNOLOGY | 2022年 / 404卷

基金：

中国国家自然科学基金;

关键词：

Nanosilica; Hydration characteristics; Pore structure; Interface transition zone; Durability; NANO-SILICA AGGLOMERATION; MECHANICAL-PROPERTIES; PORTLAND-CEMENT; FRESH PROPERTIES; PORE STRUCTURE; MICRO-SILICA; CONCRETE; MORTARS; HYDRATION; STRENGTH;

D O I：

10.1016/j.powtec.2022.117447

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Nanosilica (NS) is a nanomaterial with excellent performance. The microstructure and durability of cement-based materials are significantly affected by the addition of NS. Based on existing studies on NS, this paper summarizes the influence and mechanism behind the influence of NS on the hydration characteristics, pore structure, internal interface, chloride ion corrosion resistance, sulfate corrosion resistance, carbonation resistance, and freeze-thaw resistance of cement-based materials. NS was found to promote cement hydration and the formation of a hydrated calcium silicate (C-S-H) gel through nucleation and chemical reactions. In addition, the pore structure and internal interface of cement-based materials could be optimized and their durability improved by NS. Currently, relevant research conclusions on the influence of NS on the microstructure and durability of cement-based materials have not been reached (e.g., optimal amount of NS and optimal particle size). Therefore, further research is essential. (c) 2022 Elsevier B.V. All rights reserved.

引用

页数：17

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