ACI 224R ERTA Control of Cracking in Concrete Structures
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ACI 224R ERTA Document Information:
Title
Control of Cracking in Concrete Structures
American Concrete Institute
Publication Date:
Mar 24, 2008
Scope:
Cracks in concrete structures can indicate major structural problems
and detract from the
appearance of monolithic construction. There are many specific causes
of cracking. This report
presents the principal causes of cracking and a detailed discussion of
crack-control procedures.
The report consists of eight chapters designed to help the engineer
and the contractor in
developing crack-control measures.
This report is an update of previous committee reports (ACI Committee
224 1972, 1980, 1990). ACI
Bibliography No. 9 supplemented the original ACI 224R (1971). The
Committee has also prepared
reports on the causes, evaluation, and repair of cracking, ACI 224.1R;
cracking of concrete in
direct tension, ACI 224.2R; and joints in concrete construction, ACI
224.3R.
In this revision of the report, Chapter 2 on crack mechanisms has been
revised extensively to
reflect the interest and attention given to aspects of fracture
mechanics of concrete during the
1980s. Chapter 3 on drying shrinkage has been rewritten. Chapter 4 has
been revised to include
updated information on crack-width predictive equations, cracking in
partially prestressed members,
anchorage zone cracking, and flexural cracking in deep flexural
members. Chapter 6 on concrete
overlays has been reorganized and revised in modest detail to account
for updated information on
fiber reinforcement and on polymer-modified concrete. Chapter 7 on
mass concrete has been revised
to consider structural consequences more extensively.
Keywords:
- aggregates
- anchorage (structural)
- bridge decks
- cement-aggregate reactions
- concrete construction
- concrete pavements
- concrete slabs
- cooling
- corrosion
- crack propagation
- cracking (fracturing)
- crack width and spacing
- drying shrinkage
- shrinkage-compensating concrete
- heat of hydration
- mass concrete
- microcracking
- polymer-modified concrete
- prestressed concrete
- reinforced concrete
- restraint
- shrinkage
- temperature
- tensile stresses
- thermal expansion
- volume change
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