Cracks in concrete walls and slabs are a common occurrence They appear in 64258 oors driveways walks structural beams and walls Cracking can not be prevented but it can be signi64257 cantly reduced or controlled when the causes are taken into accoun ID: 4668
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TECH NOTES Concrete Foundations Associationof North AmericaCracking InConcrete Walls CRACKING IN CONCRETE WALLS CFA-TN-004 Concrete Foundations Associationof North AmericaCracking In Concrete Walls CRACKING IN CONCRETE WALLS A product of CFA-TN-004 GOAL AND PURPOSETech NotesYou Be Concerned?. oors, driveways, walks, structural beams, and walls. Cracking can not be cantly reduced or controlled when the causes are be a cause for alarm. involve some form of restraint. Some examples include: - Drying ShrinkageÑThis occurs as water used in the mix design evaporates. - Thermal Contraction/ExpansionÑDue to temperature changes. - Differential Bearing CapacityÑ Harder soils under part of the foundation can - Applied StressesÑForces such as building load, earth load, hydrostatic pres- Types of CracksTremendous forces can build up inside the wall due to any of these causes. Each of these causes normally leave a ÒsignatureÓ in the type of crack it cre-ates. The vast majority of cracks are of little concern by themselves. www.cfawalls.org PO Box 204, Mount Vernon, IA 52314 Toll Free 866-232-9255 Concrete Foundations Associationof North America CRACKING IN CONCRETE WALLS CFA-TN-004 cracks that do occur. thermal cracks in pre-determined locations. These can be very effective if waterproofed carefully. lling is mandatory. Typical basement walls are not designed oor at oor deck at the top, or be braced adequately, before lled. The use of heavy equipment near the wall should be use of anchor bolts/straps and blocking, is very important. Improper an- When Should You Be ConcernedTemperature and shrinkage cracks in walls or slabs are likely to occur in nearly nd long horizontal cracks, it is probably time to seek professional assis-tance. The contractor that built the wall, or your local CFA member should be