Category: How To

pop-outs

Pop-Outs in Concrete

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Pop-outs Diagnosis: Also known as rock-pops, they are small cone-shaped pieces of a concrete surface that separate due to focused internal pressure. Small pop-outs leave holes up to 0.4 in. …

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dusting

Dusting

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Dusting is the development of a soft, powdery material that can be easily rubbed off the surface of hardened concrete Diagnosis: Appearance of a powdery substance on the surface of …

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Alkali-Silica Reaction

Alkali-Silica Reaction

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Alkali-Silica Reaction (ASR), the reaction between alkalies in portland cement and certain siliceous rocks or minerals Diagnosis: An expansive cracking condition with discoloration. Cause: A chemical reaction between the naturally …

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concrete blowup

Blowup

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A blowup is a localized upward movement of a concrete curb or slab, usually at a joint or crack. Diagnosis: Cracking and subsequent deviation from the straight plane of a …

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slab curling

Curling

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Curling of Concrete Slabs Diagnosis: Also referred to as edge-curling, it’s the lifting of a slab or topping at its corners and/or edges. You’ll see cracks or deterioration around the …

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de-lamination

Delamination

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Delamination of Concrete Diagnosis: Delamination is a separation, splitting or de-bonding of the concrete’s thickness along a plane parallel to the surface. Spotted visually if the deterioration is advanced or …

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honeycombing

Honeycombing

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Concrete Honeycombing Cause: Failure of the cement paste to consolidate and fill the voids between the more coarse aggregates. Possible concrete repair solutions: Functional/aesthetic concrete only: Chip by hand to …

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plastic shrinkage cracking sm

Plastic Shrinkage Cracking

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Plastic Shrinkage Cracking in Concrete Materials Cause: Plastic Shrinkage Cracking occurs as a result of very rapid evaporation of the concrete while it is still in a plastic state. Hot, …

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crazing cracks

Concrete Crazing

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Crazing Diagnosis: Random fine cracking on the surface resembling cracked mud on a dried up pond, but in a smaller pattern. Prevention: Any concrete or masonry surface can be subject …

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bug-holes

Bug-Holes in Concrete

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Bug Holes Diagnosis: Also known as blow-holes, bug-holes are small air-bubble voids on the surface of formed concrete. Cause: Air entrapped during concrete placement and consolidation. Three main factors contribute …

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