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

[11]

Berman, Determination of Chloride in Hardened Portland Cement Paste, Mortar and Concrete, (1972)

[12]

Kolthoff, Sandell, Textbook of Quantitative Inorganic Analysis, (1952)

[13]

Gjorv, Durability of Concrete Structures in the Ocean Environment, FIP Proc. Concrete Sea Structures, (1972)

[14]

Gjorv, Durability of Reinforced Concrete Wharves in Norwegian Harbours, (1968)

[15]

Mehta, Effect of Cement Composition on Corrosion of Reinforcing Steel in Concrete, ASTM STP 629, (1977)

[16]

Sluijter, De binding van chloride door cement en de indringsnelheid van chloride in mortel, IBBC-TNO, Report No. BI-73-41/01.1.310, (1973)

[17]

Slater, Lankard, Electrochemical Removal of Chlorides from Concrete Bridge Decks, Materials Performance, 15, (1976)

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