DIFFUSION OF CHLORIDE-IONS FROM SEAWATER INTO CONCRETE

被引：106

作者：

GJORV, OE

VENNESLAND, O

机构：

来源：

CEMENT AND CONCRETE RESEARCH | 1979年 / 9卷 / 02期

关键词：

D O I：

10.1016/0008-8846(79)90029-2

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The rates of chloride diffusion from seawater into concrete made with different w/c ratios and different types of cements were studied. The effect of cathodic protection on the chloride penetration was also investigated. The effect of w/c ratio on the chloride content was limited mainly to a surface layer of the concrete and to short durations of exposure. For longer durations of exposure and for greater depths of penetration, cement type had a greater influence on the depth of chloride penetration than the w/c ratio. Portland cements gave as much as two to five times higher chloride penetration than blended cements. For the Portland cements as much as 8.6% C3A was not adequate for reducing the chloride penetration compared with zero-content of C3A. It appears that the diffusion of chloride ions into concrete is dependent not only on the permeability and the capacity of chloride binding but also on the ion exchange capacity of the system. © 1979.

引用

页码：229 / 238

页数：10

共 17 条

[1]

Ost, Monfore, Penetration of Chloride into Concrete, J. PCA Res. and Dev. Lab., 8, (1966)

[2]

Diffusion von Chlorid- und Sulfationen im Zementstein, Forschungsinstitut der Zementindustrie VDZ, Tätigkeitsbericht 1965–1966, (1966)

[3]

Ivanov, Chernomordik, Akimova, Diffusion of Salts in Cement Mortars, Zhurnal Priladnoi Khimii, 44, (1971)

[4]

Collepardi, Marcialis, Turriziani, Penetration of Chloride Ions into Cement Pastes, Journal of the American Ceramic Society, 55, (1972)

[5]

Spellman, Stratfull, Concrete Variables and Corrosion Testing, Highway Research Record, No. 423, (1973)

[6]

Weigler, Segmuller, Einwirkung von Chloriden auf Beton, Betonwerk + Fertigteil-Technik, 8, (1973)

[7]

Clear, Time to Corrosion of Reinforcing Steel in Concrete Slabs, Transportation Research Record, No. 500, (1974)

[8]

Sluijter, Kreijger, Corrosion of Reinforcement in Concrete due to Calcium Chloride, Stress Corrosion in Prestressing Steel, Heron, 22, (1977)

[9]

Theissing, Wardenier, deWind, The Combination of Sodium Chloride and Calcium Chloride by some Hardened Cement Pastes, (1975)

[10]

Gjorv, Vennesland, Cathodic Protection of Steel in Offshore Concrete Platforms, Paper submitted to NACE Corrosion 79, (1979)

← 1 2 →