ACI 350 Shrinkage and Temperature Reinforcement

Throughout us history, the ACI 350 code has provided minimum requirements for structural design, material selection, and construction of environmental engineering concrete structures. Engineers generally presume that structures designed and constructed in accordance with the code will be liquid-tigh...

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Bibliographic Details
Published inConcrete International Vol. 43; no. 4; pp. 56 - 59
Main Author Roller, John J
Format Trade Publication Article
LanguageEnglish
Published Farmington Hills American Concrete Institute 01.04.2021
Subjects
Codes
Committees
Concrete
Concrete construction
Concrete structures
Construction
Containment
Contractors
Cracks
Design
Designers
Engineering
Engineers
Environmental engineering
Materials selection
Reinforcement
Shrinkage
Structural design
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Summary:Throughout us history, the ACI 350 code has provided minimum requirements for structural design, material selection, and construction of environmental engineering concrete structures. Engineers generally presume that structures designed and constructed in accordance with the code will be liquid-tight. However, even with code-compliant designs, performance shortfalls in the form of wider-than-expected vertical cracks in tank walls that allow leakage can still occur. These vertical wall cracks are generally the result of restrained concrete shrinkage and temperature (S&T) movements. Leaking structures often leave owners wondering why. and leave contractors having to accept responsibility for repairing leaking cracks that were ultimately the result of code-compliant, yet insufficient, design. Over the 50-year history of ACI Committee 350. Environmental Engineering Concrete Structures, recommendations and requirements related to minimum S&T reinforcement for tank walls have evolved somewhat as engineers and researchers have developed a better understanding of structural behavior and restraint. This article summarizes historic committee recommendations and new ACI 350 code requirements related to minimum S&T reinforcement, and addresses the question of why many containment structures designed per the ACI 350 code have leaked.
ISSN:0162-4075
1944-7388