Experimental research on carbonation of forced concrete specimens

被引：14

作者：

Tian H. ^{[1
]}

Li G. ^{[1
]}

Liu J. ^{[1
]}

Wu Y. ^{[1
]}

机构：

[1] Department of Bridge Engineering, Tongji University

来源：

Tongji Daxue Xuebao/Journal of Tongji University | 2010年 / 38卷 / 02期

关键词：

C50 strength concrete; Carbonation experiments; Concrete specimens; Crack; Forced state; Working stress influence coefficient;

D O I：

10.3969/j.issn.0253-374x.2010.02.009

中图分类号：

学科分类号：

摘要：

The durability experiments of forced concrete specimens in accelerated carbonation corrosive environments were carried out to investigate the carbonation regularity of concrete bridges. The degradation mechanism of carbonized concrete was analyzed. The results show that tensile or compressive stress can accelerate or slow down carbonation rate, respectively. Larger changes of stress will cause larger changes of carbonation rate. The carbonation depth of bridge-common used C50 strength concrete is far smaller than that of low strength concrete but the relative carbonation depth of C50 strength concrete applied tensile stress is larger than that of low strength concrete. According to the tests, the working stress influence coefficient in existing concrete carbonation depth prediction model was modified. The crack in concrete bridges has little effect on concrete carbonation if its width can meet standard requirements, and the durable performance of prestressed concrete bridges is better than reinforced concrete bridges.

引用

页码：200 / 204+213

共 10 条

[1]

Castel A., Francccois R., Arliguie G., Effect of loading on carbonation penetration in reinforced concrete elements, Cement and Concrete Research, 29, 4, (1999)

[2]

Tu Y., Lv Z., Research on the experiment of prestressed concrete structures in carbonation environment and the prediction model of carbonation depth, Industrial Construction, 36, 1, (2006)

[3]

Liu Y., Mathematical modeling of the corrosion of reinforcement initiated by concrete carbonation, (1997)

[4]

Pan H., The durability and reliability of underground construction structure based on carbonization, (2005)

[5]

Khan M.I., Lynsdale C.J., Strength, permeability and carbonation of high-performance, Cement and Concrete Research, 32, 1, (2002)

[6]

Standard for Test Method Of Long-Term Properties And Durability On Ordinary Concrete, (1985)

[7]

Wu Y., Experiments on carbonation & chloride erosion of prestressed concrete members, (2009)

[8]

Tu Y., Lv Z., Experiment and research of presteressed concrete structure in carbonation corrosive environments, Journal of Southeast University: Natural Science Edition, 33, 5, (2003)

[9]

Code for Design Reinforced Concrete And Prestressed Concrete Bridges And Culverts, (2004)

[10]

Standard for Durability Assessment Of Concrete Structures, (2007)

← 1 →