We specialise in all forms of concrete repair and offer a vast range of long-term solutions. Here are a few typical concrete problems and their causes:
Corrosion of reinforcing steel
Steel rebar is protected inside concrete because the concrete is very alkaline which prevents rust. But if there are chloride ions present, the chloride destroys the “passivating layer” of alkalinity around the steel, allowing it to rust. Rust has greater volume than steel and the expansion presses against the concrete putting it in tension and causing it to crack and pop off. Chlorides get to the concrete through cracks or by simply penetrating through the concrete’s pore structure.
Drying shrinkage cracks
Concrete has more moisture in it when placed than is consumed by the hydration reaction. As that water evaporates, the concrete shrinks and drags on the substrate forming cracks in the concrete. Joints in concrete control the drying shrinkage cracks as the joints determine where the crack will form.
Blisters
bubbled concrete surfaces may be blisters caused by prematurely finishing and sealing the concrete surface and sealing in air and water. This can especially be a problem with air entrapped concrete and heavy finishing equipment.
Cracks from structural loads
Here’s how reinforced concrete works: the steel reinforcement is completely useless until the concrete cracks. That crack my be very narrow, even invisible, but until the concrete cracks the steel doesn’t start getting pulled to hold the concrete together. If there is no steel, inadequate steel, or the loads are too heavy (either during construction or in service), then the cracks can become wider.
FixART offer qualified concrete repair services
FixART staff are qualified and experienced in the proper and professional concrete repair technique that is critical to returning a building or asset to safe operating performance. Some form of structural repairs are required for all concrete structures over time. If evidence of cracking, drummy concrete, rust staining or concrete cancer is present then immediate repair becomes a necessity as further deterioration increases the likelihood of damage. If left un-abated then failure of the structure becomes an increasingly likely result.
FixART are able to assist you with all your concrete repair requirements
A variety of modified cementitious repair materials have been developed to accent the different forms of repair methods ranging from hand patching to pumpable mixes for large repairs. FixART are able to assist clients in diagnosing the cause, developing a scope, selection of materials and repair methodology to ensure delivery of a satisfactory desired end product.