[1]李北星,方晴,方鹏.大掺量掺合料混凝土半浸泡于硫酸盐溶液中的耐久性[J].哈尔滨工程大学学报,2020,41(6):892-898.[doi:10.11990/jheu.201901105]
 LI Beixing,FANG Qing,FANG Peng.Durability of high-volume mineral admixture concrete half immersed in sodium sulfate solution[J].hebgcdxxb,2020,41(6):892-898.[doi:10.11990/jheu.201901105]
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《哈尔滨工程大学学报》[ISSN:1006-6977/CN:61-1281/TN]

卷:
41
期数:
2020年6期
页码:
892-898
栏目:
出版日期:
2020-06-05

文章信息/Info

Title:
Durability of high-volume mineral admixture concrete half immersed in sodium sulfate solution
作者:
李北星1 方晴2 方鹏1
1. 武汉理工大学 硅酸盐建筑材料国家重点实验室, 湖北 武汉 430070;
2. 湖北省电力勘测设计院, 湖北 武汉 430040
Author(s):
LI Beixing1 FANG Qing2 FANG Peng1
1. State Key Laboratory of Silicate Materials for Architecture, Wuhan University of Technology, Wuhan 430070, China;
2. Hubei Electric Power Survey & Design Institute, Wuhan 430040, China
关键词:
盐渍土硫酸盐侵蚀大掺量矿物掺合料混凝土半浸泡干湿循环耐久性腐蚀机理
分类号:
TU528.01
DOI:
10.11990/jheu.201901105
文献标志码:
A
摘要:
为提升硫酸盐盐渍土地区半埋混凝土的耐久性,本文开展了3种大掺量矿物掺合料混凝土在硫酸钠溶液中的半浸泡干湿循环试验。通过对侵蚀后的混凝土试件液面上、下部位进行宏观、微观测试,研究了硫酸盐半浸泡混凝土的腐蚀破坏机理,以及矿物掺合料在其中发挥的作用。结果表明:在硫酸盐半浸泡条件下,液面上部混凝土的腐蚀程度比液面下部严重。液面上部混凝土的腐蚀机理包括物理腐蚀和化学腐蚀,物理腐蚀产物为硫酸盐晶体;化学腐蚀产物为石膏、钙矾石;液面下部混凝土的腐蚀机理以化学腐蚀为主,腐蚀产物为石膏、钙矾石。大掺量粉煤灰对提高混凝土耐久性能的作用不大;而大掺量矿粉以及矿粉与粉煤灰复掺,通过削弱石膏型腐蚀作用,发挥矿物掺合料的火山灰作用和微填充效应,显著提高了混凝土的抗硫酸盐腐蚀性能。

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-01-31。
基金项目:国家自然科学基金项目(51372185);国家电网公司2016年度依托工程基建新技术研究项目(第40分项目).
作者简介:李北星,男,教授,博士生导师.
通讯作者:李北星,E-mail:libx0212@126.com.
更新日期/Last Update: 2020-07-22