全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

冻融循环作用下混凝土毛细孔结构的劣化机制

DOI: 10.11830/ISSN.1000-5013.2015.06.0716

Keywords: 毛细吸水, 水饱和状态, 冻融循环, 孔结构, 混凝土

Full-Text   Cite this paper   Add to My Lib

Abstract:

研究冻融循环作用下混凝土毛细孔结构的演变规律,并与吸水性及宏观性能相结合,探索毛细孔结构的劣化机制及其对混凝土宏观性能的影响规律.结果表明:水饱和状态是造成冻融循环过程中混凝土孔结构改变的重要因素;利用混凝土毛细吸水系数能够较为明确地反映冻融循环作用下混凝土内部结构的改变;毛细吸水系数初值和增长速率是表征毛细孔结构演变规律的关键参数,毛细吸水系数越大,冻融循环后混凝土强度越低.

References

[1]  LI Shuguang,CHEN Gaixin,JI Guojin,et al.Quantitative damage evaluation of concrete suffered freezing-thawing by DIP technique[J].Construction and Building Materials,2014(69):177-185.
[2]  黄蓓,钱春香.掺合料混凝土的毛细吸水现象[J].混凝土与水泥制品,2008(4):14-16.
[3]  ROSSIGNOLO J A,AGNESINI M.Durability of polymer-modified lightweight aggregate concrete[J].Cement and Concrete Composites,2004,26(4):375-380.
[4]  TASDEMIR C.Combined effects of mineral admixtures and curing conditions on the sorptivity coefficient of concrete[J].Cement and Concrete Research,2003,33(10):1637-1642.
[5]  MEDEIROS M,HELENE P.Surface treatment of reinforced concrete in marine environment: Influence on chloride diffusion coefficient and capillary water absorption[J].Construction and Building Materials,2009,23(3):1476-1484.
[6]  慕儒.冻融循环与外部弯曲应力、盐溶液复合作用下混凝土的耐久性与寿命预测[J].南京:东南大学,2000:1-20.
[7]  陈斌,李富强,刘国华,等.混凝土配合比的非线性多目标优化算法研究[J].浙江大学学报(工学版),2005,39(1):16-19.
[8]  WANG Zhenjun,LI Kezhi,WANG Chuan.Freezing-thawing effects on electromagnetic wave reflectivity of carbon fiber cement based composites[J].Construction and Building Materials,2014(64):288-292.
[9]  YAZICI H.The effect of silica fume and high-volume class C fly ash on mechanical properties, chloride penetration and freeze-thaw resistance of self-compacting concrete[J].Construction and Building Materials,2008,22(4):456-462.
[10]  张朝辉,王沁芳,杨娟,等.透水混凝土强度和透水性影响因素研究[J].混凝土,2008(3):7-9.
[11]  SI Wei,MA Biao,LI Ning,et al.Reliability-based assessment of deteriorating performance to asphalt pavement under freeze-thaw cycles in cold regions[J].Construction and Building Materials,2014(68):572-579.
[12]  张金喜,张建华,邬长森,等.再生混凝土性能和孔结构的研究[J].建筑材料学报,2006,9(2):142-147.
[13]  李浩,施养杭.混凝土碳化深度预测模型的比对与分析[J].华侨大学学报(自然科学版),2007,28(2):192-195.
[14]  陈健,徐伟.清水混凝土耐久性的内部结构微观分析[J].建筑施工,2005,27(10):62-64.
[15]  李金玉,曹建国,徐文雨,等.混凝土冻融破坏机理的研究[J].水利学报,1999(1):41-49.
[16]  MARTYS N S,FERRARIS C F.Capillary transport in mortars and concrete[J].Cement and Concrete Research,1997,27(5):747-760.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133