冻融循环作用下粉煤灰混凝土碳化规律研究

陈树东; 孙伟; 余红发; 张云升

doi:10.13204/j.gyjz201201025

冻融循环作用下粉煤灰混凝土碳化规律研究

doi: 10.13204/j.gyjz201201025

1.
1. 南京航空航天大学土木系,南京 210016;
2.
2. 浙江建设职业技术学院,杭州 311231;
3.
3. 东南大学材料科学与工程系,南京 210096

基金项目:

国家973资助项目(2009CB623200);国家博士后基金资助项目(20090461107)

详细信息

作者简介:
陈树东，男，1978年出生，博士后。E－mail:chenshudong1978@163.com

计量
- 文章访问数: 72
- HTML全文浏览量: 1
- PDF下载量: 93
- 被引次数: 0
出版历程
- 收稿日期: 2011-02-13
- 刊出日期: 2012-01-20

STUDY ON CARBONATION OF FLY ASH CONCRETE WITH FREEZE-THAW CYCLE

1.
1. Department of Civil Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;
2.
2. Zhejiang College of Construction,Hangzhou 311231,China;
3.
3. Department of Materials Science and Engineering,Southeast University,Nanjing 210096,China

摘要

摘要: 研究不同粉煤灰掺量(0%、20%、40%、60%)下高性能混凝土经快速冻融试验后的碳化现象;定义冻融循环作用下混凝土碳化判定新准则;采用图像处理技术定量分析不同粉煤灰掺量、不同冻融破坏程度对碳化的影响规律。试验表明:经冻融破坏后混凝土碳化现象和传统碳化现象有所不同,碳化深度测试法已不能表征其新特征,而碳化面积法能较好阐述混凝土冻融破坏后的碳化规律;冻融破坏后的碳化面积与粉煤灰掺量呈二次抛物线关系;碳化面积与冻融破坏程度服呈线性相关;混凝土冻融循环作用下的碳化研究对冻融地区混凝土结构耐久性和寿命预测具有现实意义。
- 粉煤灰混凝土 /
- 冻融循环 /
- 碳化 /
- 图像处理
Abstract: Carbonation of high performance concrete under freeze-thaw cycles was studied with different fly ash proportion(0%,20%,40%,60%);the new rules to estimate carbonation of concrete under freeze-thaw cycles were defined.The influence of different fly ash proportion and different freeze-thaw damage on carbonation was analyzed quantitatively by image processing techniques.Experiment results showed that the carbonation of concrete after freeze-thaw cycles was different from the traditional carbonation of concrete.The traditional testing method using carbonation depth could not express new feature of carbonation after freeze-thaw damage.And the new testing method using carbonation area could better express the carbonation law.The carbonation area and fly ash proportion subject quadratic equation =45.12-1.35FA+0.035FA2;and the carbonation area and freeze-thaw damage degree linear equation =35+0.306x.The research on the carbonation of concrete under freeze-thaw cycles possesses the real meaning to the structure durability and life prediction of concrete in the freeze-thaw area.
- fly ash concrete /
- freeze-thaw cycle /
- carbonation /
- image processing

HTML全文

参考文献(7)

金伟良,赵羽习. 混凝土结构耐久性[M].北京:科学出版社,2002.16-17.

张誉,蒋利学. 混凝土结构耐久性概论[M].上海:上海科学技术出版社,2003.

Cengiz D A. Accelerated Carbonation and Testing Concrete Made with Fly Ash[J].Construction and Building Materials,2003,(03):147-152.

Papadakis V G,Vayenas C G. Experimental Investigation and Mathematical Modeling of the Concrete Carbonation Problem[J].Chemical Engineering Science,1991,(46):1333-1338.

Castel A,Francois R,Arliguie G. Effect of Loading on Carbonation Penetration in Reinforced Concrete Elements[J].Cement and Concrete Research,1999,(29):561-565.

余红发,慕儒,孙伟. 弯曲荷载、化学腐蚀和碳化作用及其复合对混凝土抗冻性的影响[J].硅酸盐学报,2005,(33):492-499.

陈树东. 荷载与环境因素耦合作用下粉煤灰结构混凝土劣化规律与寿命预测[D].南京:东南大学,2008.

施引文献

资源附件(0)

访问统计