Effects of superplasticizers on carbonation resistance of concrete

被引：42

作者：

Shi, Chen ^{[1
]}

He, Ting-shu ^{[1
]}

Zhang, Ge ^{[1
]}

Wang, Xi ^{[1
]}

Hu, Yanyan ^{[1
]}

机构：

[1] Xian Univ Architecture & Technol, Coll Mat & Mineral Resources, Xian 710055, Shaanxi, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2016年 / 108卷

基金：

新加坡国家研究基金会;

关键词：

Concrete; Carbonation; Superplasticizer; Pore structure; Hydration products; Morphology; POLYCARBOXYLATE-TYPE SUPERPLASTICIZER; ARID CLIMATE; HYDRATION; ADMIXTURES; DISPERSANTS; ENVIRONMENT; ADSORPTION; SILICATE;

D O I：

10.1016/j.conbuildmat.2016.01.037

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The effects of polycarboxylic acid (PC), naphthalene sulfonate (NS), and aliphatic (AH) superplasticizers on the carbonation of concrete were investigated. These three kinds of superplasticizers can improve anti-carbonation performance of concrete, and their order according to magnitude of effect are as follows PC > AH > NS. The mechanism behind this phenomenon was investigated using mercury intrusion porosimetry of the concrete, thermogravimetric analysis, X-ray diffraction, scanning electron microcopy, and X-ray photoelectron spectrometry of synthetic hydrated products. The effects of superplasticizers on carbonation resistance are associated not only with pore structure but also with the morphology of hydrated products. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：48 / 55

页数：8

共 20 条

[1] Carbonation of concrete exposed to hot and arid climate [J].