Offshore sand for reinforced concrete

被引：68

作者：

Dias, W. P. S. ^{[1
]}

Seneviratne, G. A. P. S. N. ^{[1
]}

Nanayakkara, S. M. A. ^{[1
]}

机构：

[1] Univ Moratuwa, Dept Civil Engn, Moratuwa, Sri Lanka

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2008年 / 22卷 / 07期

关键词：

offshore sand; chloride content; accelerated corrosion; half cell potential; shell content; sand grading;

D O I：

10.1016/j.conbuildmat.2007.04.006

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

A figure of 0.075% by weight of sand was arrived at as a safe limit for allowable Cl- ion content in offshore sand for OPC based reinforced concrete. A 2 m high sand column was fabricated for checking the effects of natural drainage and simulated rain on the chloride levels in offshore sand, and the action of even 80 mm of rain was found to reduce Cl- contents to below acceptable levels. The accelerated corrosion performance of grade 20 concrete (i.e. the most critical structural grade) with the allowable Cl- content in the sand was satisfactory and similar to a chloride free control mix; on the other hand, a mix with seawater saturated sand (0.3% Cl-) showed clear evidence of high corrosion. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1377 / 1384

页数：8