[1]张云升,孙伟,陈树东,等.粉煤灰混凝土2D和3D碳化试验[J].东南大学学报(自然科学版),2006,36(4):562-567.[doi:10.3969/j.issn.1001-0505.2006.04.014]
　Zhang Yunsheng,Sun Wei,Chen Shudong,et al.2D and 3D carbonation of fly ash concrete[J].Journal of Southeast University (Natural Science Edition),2006,36(4):562-567.[doi:10.3969/j.issn.1001-0505.2006.04.014]
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粉煤灰混凝土2D和3D碳化试验()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
36
期数:
2006年第4期
页码:
562-567
栏目:
材料科学与工程
出版日期:
2006-07-20

文章信息/Info

Title:
2D and 3D carbonation of fly ash concrete
作者:
张云升;  孙伟;  陈树东;  蒋金阳;  郭飞;  慈志强
东南大学材料科学与工程学院, 南京 210096
Author(s):
Zhang Yunsheng;  Sun Wei;  Chen Shudong;  Jiang Jinyang;  Guo Fei;  Ci Zhiqian
College of Materials Science and Engineering, Southeast University, Nanjing 210096, China
关键词:
粉煤灰;  混凝土;  碳化;  二维;  三维;  交互作用
Keywords:
fly ash;  concrete;  carbonation;  2 dimension(2D);  3 dimension(3D);  interaction
分类号:
TU528
DOI:
10.3969/j.issn.1001-0505.2006.04.014
摘要:
首先建立了2D和3D碳化测试方法,在此基础上系统研究了粉煤灰混凝土在加速碳化试验中2D和3D碳化深度的依时变化规律,探讨了粉煤灰掺量(0%,10%,20%,40%,60%)、粉煤灰种类(Ⅰ级、Ⅱ级)、水胶质量比(0.3,0.35,0.4)、胶凝材料用量(458,380 kg/m3)、养护龄期(28,90 d)5个重要因素对粉煤灰混凝土2D和3D碳化深度的影响规律.另外,还将2D和3D碳化试验结果与同条件下1D碳化进行了定量比较,发现2D和3D碳化明显存在交互作用,为量化该交互作用提出了2D和3D碳化交互系数概念,并给出了2D和3D碳化交互系数随时间变化的数学表达式.以期为准确预测实际混凝土结构在真实状态下碳化寿命提供科学依据.
Abstract:
A method used to measure the carbonation depth at 2 and 3 dimensional(2D, 3D)CO2 flow is developed in this paper. Using this method, 2D and 3D carbonation depth at different carbonation age are systematically investigated for concretes with different fly ash percentage(0%, 10%, 20%, 40%, 60%), types of fly ash(grade Ⅰ, grade Ⅱ), water to binder ratios(0.3, 0.35, 0.4), amount of binders(458, 380 kg/m3), and curing ages(28, 90 d). In addition, a comparison is made with 1D carbonation testing results. An interaction effect caused by 2D and 3D carbonation can obviously be observed through the comparison. In order to quantify the interaction effect, 2D and 3D carbonation interaction coefficients are proposed in this paper. Finally, the changes of 2D and 3D carbonation interaction coefficients with time are given. The above research provides an insight into the carbonation attack on the edge and corner reinforcing bars of concrete structures in the field of civil engineering.

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备注/Memo

备注/Memo:
基金项目: 江苏省重大工程资助项目(STDQ-04HT20SY-010)、南京水利科学研究院开放流动研究基金资助项目(Yk90508)、武汉理工大学硅酸盐材料工程教育部重点实验室开放基金资助项目(SYSJJ2004-02).
作者简介: 张云升(1974—),男,博士,副教授, zhangys279@163.com.
更新日期/Last Update: 2006-07-20