Response of Air-Entrained Concrete to Severe Chemical Aggression

The primary objective of this study is to investigate the response of air-entrained concrete to aggressive chemicals. To better correlate to field practices, 60 concrete mixtures were prepared with three cement contents, five air content ranges, and water content adjusted to yield moderate to high s...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials in civil engineering 2006-02, Vol.18 (1), p.11-17
Main Authors: Khedr, Safwan A, Abou-Zeid, Mohamed Nagib, Abadir, Jane M
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Concretes. Mortars. Grouts
Corrosion
Durability. Pathology. Repairing. Maintenance
Exact sciences and technology
Lightweight concretes
Materials
TECHNICAL PAPERS
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The primary objective of this study is to investigate the response of air-entrained concrete to aggressive chemicals. To better correlate to field practices, 60 concrete mixtures were prepared with three cement contents, five air content ranges, and water content adjusted to yield moderate to high slump ranges. Samples were subjected to abrasion testing and were exposed to sulfuric acid, calcium chloride, and ammonium sulfate solutions. The results reveal that air-entrained mixtures yielded reduced permeability but relatively less abrasion resistance. Yet they demonstrated enhanced resistance to chemicals as expressed by more exposure cycles and/or less mass loss. The combined effect of both exposure duration and mass loss is expressed by a factor (chemical disintegration factor), which is thought to be useful in similar studies. The results suggest that producing high workability, air-entrained concrete with adequate strength and abrasion resistance, low permeability, and superior chemical resistance is possible. This can be useful in sewer structures and concrete applications where surfaces are subjected to mild abrasion and aggressive chemicals.
ISSN:0899-1561
1943-5533
DOI:10.1061/(ASCE)0899-1561(2006)18:1(11)