|本期目录/Table of Contents|

[1]乔宏霞,路承功,李 宇,等.宁夏盐渍土地区现场暴露混凝土耐久性损伤评价试验[J].建筑科学与工程学报,2016,33(06):44-52.
　QIAO Hong-xia,LU Cheng-gong,LI Yu,et al.Experiment on Durability Damage Assessment of Concrete Field Exposed in Saline Soil Area of Ningxia[J].Journal of Architecture and Civil Engineering,2016,33(06):44-52.
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
33卷
期数:
2016年06期
页码:
44-52
栏目:
出版日期:
2016-11-30

文章信息/Info

Title:
Experiment on Durability Damage Assessment of Concrete Field Exposed in Saline Soil Area of Ningxia
作者:
乔宏霞，路承功，李 宇，关利娟
兰州理工大学甘肃省土木工程防灾减灾重点实验室
Author(s):
QIAO Hong-xia, LU Cheng-gong, LI Yu, GUAN Li-juan
Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology
关键词:
混凝土; 现场暴露; 盐渍土; 耐久性; 损伤评价; 硫酸盐侵蚀
Keywords:
concrete;  field exposure;  saline soil;  durability;  damage assessment;  sulfate erosion
分类号:
-
DOI:
-
文献标志码:
A
摘要:
以掺有不同粉煤灰量的混凝土试件为研究对象，将3种配合比的混凝土试件暴露在具有典型盐渍土特征的宁夏地区，选取相对质量和相对动弹性模量作为评价参数，通过比较分析得出一种更加适合盐渍土地区现场暴露混凝土耐久性损伤的综合评价参数。同时结合现场暴露混凝土微观分析对盐渍土地区混凝土受硫酸盐侵蚀的劣化机理进行了研究，从微观角度分析了盐渍土地区混凝土耐久性能变化的原因。结果表明：混凝土在盐渍土地区受到复杂的化学侵蚀，与土壤中的硫酸盐反应生成了硫铝酸钙晶体填充在孔隙中，综合损伤评价参数能很好地描述盐渍土地区混凝土的耐久性。
Abstract:
The concrete specimens with different amounts of fly ash were taken as research object. The concrete specimens of three kinds of mix ratio were exposed to saline soil with typical characteristics in Ningxia area. The relative mass and relative dynamic elastic modulus were selected as evaluation parameters. Through the comparative analysis, the more suitable comprehensive damage assessment parameters of durability evaluation of the concrete field exposed in the saline area were obtained. At the same time, the degradation mechanism of concrete under sulfate erosion in saline soil was studied combining with microcosmic analysis of field exposed concrete. The reasons for the durability change of concrete in saline soil area were analyzed from micro perspective. The results show that the concrete is subjected to complex chemical erosion in the saline soil area, and react with sulfate in soil to form calcium sulphoaluminate crystals which is filled in the pore. The durability of concrete in saline soil area can be well described by the comprehensive damage assessment parameters.

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备注/Memo

备注/Memo:
更新日期/Last Update: 2016-12-07