Air Leakage Characteristics in Reinforced Concrete

Eight reinforced concrete specimens were fabricated and subjected to tensile membrane forces and air pressure to study the air leakage characteristics in cracked reinforced concrete members. A mathematical expression for the rate of pressurized air flowing through an idealized crack is presented. Th...

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Bibliographic Details
Published in:	Journal of structural engineering (New York, N.Y.) Vol. 110; no. 5; pp. 1149 - 1162
Main Authors:	Rizkalla, Sami H, Lau, Bon L, Simmonds, Sidney H
Format:	Journal Article
Language:	English
Published:	Reston, VA American Society of Civil Engineers 01-05-1984
Subjects:	Applied sciences Buildings. Public works Concretes. Mortars. Grouts Exact sciences and technology General (composition, classification, performance, standards, patents, etc.) Materials TECHNICAL PAPERS Airtightness Air infiltration Test piece Containment confinement Calculating method Reinforced concrete Crack
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Summary:	Eight reinforced concrete specimens were fabricated and subjected to tensile membrane forces and air pressure to study the air leakage characteristics in cracked reinforced concrete members. A mathematical expression for the rate of pressurized air flowing through an idealized crack is presented. The mathematical expression is refined by using the experimental data to describe the air flow rate through any given crack pattern. Graphical charts are also presented for the calculation of the air leakage rate through concrete cracks. The concept of equivalent crack width for a given crack pattern is introduced. The mathematical expression and graphical charts are modified to include this equivalent crack width concept. The proposed technique is applicable for the prediction of the leakage from concrete containment structures or any similar structures due to high internal pressure sufficient to initiate cracking.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0733-9445 1943-541X
DOI:	10.1061/(ASCE)0733-9445(1984)110:5(1149)