|本期目录/Table of Contents|

[1]孙洋,刁波.混合侵蚀与冻融环境下混凝土力学性能劣化试验[J].建筑科学与工程学报,2008,25(02):41.
　SUN Yang,DIAO Bo.Experiment of Mechanical Properties Deterioration of Concrete in Multi-aggressive and Freeze-thaw Environment[J].Journal of Architecture and Civil Engineering,2008,25(02):41.
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混合侵蚀与冻融环境下混凝土力学性能劣化试验(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
25卷
期数:
2008年02期
页码:
41
栏目:
出版日期:
2008-06-20

文章信息/Info

Title:
Experiment of Mechanical Properties Deterioration of Concrete in Multi-aggressive and Freeze-thaw Environment
作者:
孙洋，刁波
北京航空航天大学土木工程系,北京100083
Author(s):
SUN Yang, DIAO Bo
Department of Civil Engineering, Beihang University, Beijing 100083, China
关键词:
混凝土;  冻融循环;  侵蚀环境;  力学性能劣化;  水灰比
Keywords:
concrete;  freeze-thaw cycle;  aggressive environment;  mechanical property deterioration;  water cement ratio
分类号:
TU528
DOI:
-
文献标志码:
A
摘要:
以质量分数为3%的NaCl和5%的Na2SO4混合溶液为侵蚀介质,采用快冻法,对设计强度等级为C30、水灰比分别为0.44、0.50、0.55的混凝土试件进行了0、50、100、150、200次冻融循环试验,测定了各组试件的质量损失、抗压强度、应力、应变等。试验结果表明,混凝土随着冻融循环次数的增多,其表观质量和力学性能均呈现出不同程度的下降趋势,且水灰比越大下降越快。建立了与冻融循环次数相关的力学性能劣化线性方程,为进一步开展混凝土结构在冻融和侵蚀离子共同作用下的劣化机理与计算模型的研究提供了依据。
Abstract:
With mass fraction of 3% NaCl and 5% Na2SO4 mixed solution as aggressive medium, by adopting quick freeze-thaw method, freeze-thaw tests of freeze-thaw cycles of being 0,50,100,150 and 200 were carried out on concrete specimens. The design strength grade was C30 and the water cement ratio was 0.44,0.50,0.55 respectively. The mass loss, compressive strength, strain and stress and so on were tested. The experimental results show that with the increase of times of freeze-thaw cycles, the apparent quality and mechanical properties decline in different velocities, which is higher when water cement ratio is higher. The mechanical properties deterioration linear equations related to freeze-thaw cycles were established. The result can offer reference for further research on deterioration mechanism and calculation model of reinforced concrete structures in multiple actions of freeze-thaw cycles and aggressive ions.

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备注/Memo

备注/Memo:
收稿日期:2008-03-01
基金项目:国家自然科学基金项目(50778010)
作者简介:孙 洋(1982-),男,内蒙古乌兰浩特人,工学博士研究生,E-mail:sunyang@ce.buaa.edu.cn。
更新日期/Last Update: 2008-06-20