Can You Repair Cracked Concrete?
Wide cracks in concrete are best patched and sealed with a concrete patching compound. Smaller cracks, less than 1/4 inch wide, can be repaired with a concrete caulk or liquid filler or Epoxy Injections to Repair Cracked Concrete. Patching compounds typically are mixed with water and applied with a trowel. They have a texture similar to grout and can be smoothed and textured to blend with the surrounding area. However, the colour of the patch will look like new concrete and will not match the old concrete. Hiding the patch completely requires painting the surface with appropriate concrete paint.
Epoxy Crack Injections
The ARDEX Epoxy Injections used to Repair Cracked Concrete uses a high strength, rapid setting two-part system to repair concrete damage from hairline cracks right through to structural repairs. These products are ideal for repairing holes, spalls and cracks in concrete, in internal as well as external situations where heavy duty vehicle traffic is anticipated. Once cured, the Repaired Concrete Cracks will be two to three times stronger than the original concrete, guaranteeing a long lasting and durable Concrete Crack Repair solution.
Epoxy injection is a process by which the structural integrity of a cracked concrete member can be restored to its original strength.
Epoxy is pumped into a crack under pressure. The injection is performed to insure that epoxy fully penetrates and fills the crack. Once the epoxy has cured, the concrete is in essence welded back together.
Epoxy has a cured strength many times higher than the concrete itself, restoring injected members to their original strength. Any known cause for the cracking or settlement of the structure should be addressed to mitigate any future movement.
Epoxy Injection is an extremely cost effective alternative to removal and replacement of the cracked concrete and can be executed with minimal disturbance.
– Concrete support columns
– Foundation Walls
– Concrete Slabs
– Concrete Bridges
– Machine Base Plates
– Concrete Tanks
– Cost effective alternative to removal and replacement
– Restores Structural Integrity
– Full Depth Repair
– Non Invasive
How Do I Stop My Concrete Cracking?
Concrete is defined as a mixture of sand, aggregate, and water. Aggregate is a composite of gravel, crushed stone, synthetic materials, slag, and other recycled substances. The quality of concrete has to do with the ratio of sand to aggregate and water. Too much or too little of either of these substances will result in poor quality concrete. Concrete is mixed together with a lime-based cement to form a malleable putty so that it can be worked into any shape. To enhance the durability of the concrete, additives can be thrown into the mixture before it is poured to make it more flexible and reduce its chances of cracking.
Curing is the period during which concrete obtains its strength and durability. 90% of concrete’s strength is acquired during the first four weeks after it is poured. The three factors which affect this process are hydration, temperature, and humidity. To ensure full hydration during curing, concrete slabs are usually sprayed with a hydrophobic wax film to keep moisture in. More traditional techniques involve spraying the concrete with water and wrapping it with plastic to get a similar effect.
The remaining 10% of the concrete’s strength is achieved over the years or even decades. The absorption of carbon-dioxide strengthens the concrete and makes it more resistant to damage, however, it also becomes more acidic which can corrode steel reinforcement bars; otherwise known as rebar corrosion, Concrete Spalling & Concrete Cancer. The steel will expand while it is corroding which can cause the concrete to crack under pressure.
The most common form of concrete is ‘reinforced concrete’ which contains a steel framework or mesh. Concrete has a relatively high compressive strength but a significantly lower tensile strength. In other words, it is weaker when stretched out and stronger when compact. Steel, on the other hand, has a high tensile strength which compensates for concrete’s lack of tensile strength. Steel rebar, therefore, allows concrete to be stretched out in thinner layers. It is better for reinforced concrete to crack when stretched out rather than compressed because the steel reinforcement will hold it together, for example on a bridge.
How Does Concrete Crack Repair Work?
Concrete can crack for almost any reason. Concrete Crack Repair Sydney is committed to properly investigating the cause of your concrete cracks. Not only do we repair the damage but we also prevent future damage from occurring.
Firstly, it is important to understand that the quality of your concrete and the way it is cured will affect its resistance to cracking. The quality of your concrete has a direct impact on its durability and the curing process will affect its strength. Therefore we believe in using the highest quality materials and methods to repair your Concrete Cracks.
We use the latest technologies and practices to diagnose the causes of Concrete Cracking. These could be chemical, environmental, physical, bacterial, thermal or even from radiation. The selection of the appropriate approach will depend on the cause of the initial damage.
Depending on if the Concrete Cracking is narrow or wide, different methods are used:
How To Repair Wide Concrete Cracks
1. The secret to fixing wide Concrete Cracks is to undercut the sides of the crack to give it an inverted “V” shape. This helps the repair material to “key” into the crack, creating a mechanical bond in addition to the chemical bond between the patch material and the concrete.
2. Chisel the Cracked Concrete with a hammer and masonry chisel to widen the base of the crack and to dislodge any loose material from the old concrete.
3. Remove all debris from the crack, using a wire brush. If desired, clean the crack with a pressure washer or a garden hose and spray nozzle.
4. Remove all water and debris from the crack with a wet/dry shop vacuum or a brush. Work carefully to remove all dust and grit from the Concrete Crack. It’s Okay if the surfaces are wet, but there should be no pools of water.
5. Mix the concrete patching compound, following the manufacturer’s directions.
6. Trowel the compound into the Cracked Concrete. Stab the trowel into the compound to remove air pockets and help work the patching material deep into the crack. Fill the Concrete Crack up to the surrounding concrete surface.
7. Smooth the surface of the patch with the trowel, feathering the compound into the surrounding concrete.
8. Brush the surface of the patching compound with a dry paintbrush to texture the surface, if desired.
9. Let the compound cure as directed.
10. Paint or seal the surface of the patch and surrounding area, if desired.
How to Repair Narrow Concrete Cracks
Narrow Concrete Cracks can be filled using masonry crack elastomeric filler that can be applied with a caulking gun. Very small cracks, such as hairline cracks, can be repaired using a vinyl concrete patching compound applied over the crack and then smoothed with a putty knife or trowel. For hairline cracks, applying repair caulk or crack filler over the cracks usually is not effective, as the caulk tends to peel off of the surface over time.
Narrow Concrete Cracks can be deep, often extending through the entire thickness of the concrete slab. Therefore, it’s a good idea to start the repair by stuffing foam backer rod into the Concrete Crack to create a base to hold the repair material. The backer rod is solid in a variety of sizes; use a rod diameter that is slightly larger than the width of the crack. Stuff the backer rod into the Cracked Concrete with a screwdriver to a depth of 1/4 inch. Fill the Cracked Concrete with the repair material, following the manufacturer’s directions.
Types Of Concrete Cracks
Carbonation over a long period of time concrete will absorb carbon dioxide from the air which causes a chemical reaction with lime in the cement, yielding more acidic concrete. This causes the steel reinforcement bars to rust and expand, the force of which will eventually crack the concrete. It can be tested for using a pH indicator.
Chlorides shorten the setting time of concrete, however, they leach calcium hydroxide leading to a loss of strength which in turn affects the durability of the concrete leading to early failure.
Examples include ‘acid rain’ and ‘crown rot corrosion’ in sewers.
When water flows through the cracks in concrete, dissolving minerals and carrying them to other places forming lumps at the outer surface.
The leaching of calcium hydroxide from concrete cracks can facilitate the growth of ‘calthemites’ which mimic the appearance of stalactites in caves.
Seawater & wind, Concrete exposed to seawater is more susceptible to corrosion and erosion. Wind also plays a role in erosion.
Bacteria themselves do not have a noticeable effect on concrete, however, they do play a role in ‘crown rot corrosion’ in untreated sewer waters.
Earthquakes, tremors and other sources of vibration are likely to impact the structural integrity of the concrete.
Fire will expose the concrete to gasses, acids, salts, and liquids that can be damaging.
Exposure to neutrons, gamma radiation and high-flux material testing reactors in nuclear power plants other radiation zones can cause concrete to become unstable.
Can You Repair Concrete Spalling?
We undertake a professional investigation with our highly skilled Concrete Spalling Repair team to identify the source of the problem that is causing concrete cancer and concrete spalling damage throughout your property. Identifying the source is vital in reducing the probability of further ongoing Concrete Spalling Repair. Once the nature of, or cause of and the source is identified, we determine the best possible solution for our clients to repair the Spalling Concrete.
Our Concrete Spalling Repair specialists team offers a free price beat guarantee quote to Repair Concrete Spalling.
Our team are Concrete Spalling Repairs specialists and are licensed, insured professionals at inspecting your concrete slab so that any Concrete Spalling Repair can be fixed appropriately in a safe and efficient manner, while also being cost-effective and approved by strata.
Our concrete cancer and Concrete Spalling Repair team are experts in the field, that are highly trained and respected throughout NSW. We use high-quality equipment, tools and techniques to ensure that we can restore your concrete slab to a safe and usable condition which will be ready for the re-installation of a new flooring system.
How We Repair Spalling Concrete
Concrete Cancer Caused By Magnesite Flooring
When Magnesite Flooring is exposed to moisture over prolonged periods of time, chloride ions from the Magnesite Flooring diffuse into the pores of the underlying concrete slab eventually reaching the reinforcing steel.
As chloride levels in the slab reach the chloride threshold, corrosion of the steel reinforcement will begin to take place, the longer the exposure time to the moisture source, the more aggressive the corrosion of the steel reinforcement. Corrosion of this nature results in the pitting of the steel reinforcement where it loses its cross-sectional area and strength.
Iron oxide deposits also occur, causing expansive forces within the concrete. These forces cause cracking and Spalling Of Concrete around the corroding steel, a common name for this type of Concrete Spalling is Concrete Cancer.
Signs of Concrete Spalling were noted throughout various units in manly when Carpet Removal Sydney was on a commercial job site doing a strata Magnesite Flooring job. Concrete Cancer had been caused by water leaking from various sources, saturating the Magnesite Flooring for prolonged periods of time.
Magnesite Flooring can be removed with specialized equipment by our Magnesite Flooring removal specialist team. leaving the concrete slab in a condition that is ready to have new flooring installed on.
Although sometimes some Magnesite Flooring jobs will have Magnesite residue stuck to the floor even after the Magnesite Flooring has been jackhammered off. When this happens the remaining residue will need to be ground off using specialized equipment to restore your concrete slab back to a level, smooth state allowing a new flooring system to be installed or to allow the fresh concrete slab to be used as your new floor.
Concrete Cancer is often caused by Magnesite Flooring, Our team are Australia’s leading experts in the removal of Magnesite Flooring. Magnesite Flooring should always be removed for your safety as it can contain asbestos and often causes Concrete Cancer.
To get a free quote to have your Magnesite Flooring removed view our Magnesite Flooring Removal page here!
Our Promise To You
We specialise in delivering Concrete Crack Repair solutions to the residential, commercial, industrial and civil sectors throughout Sydney. No job is too big or too small. We’ve built our reputation based on quality workmanship, efficient service, and value for money.
We offer the best prices in Sydney on all Cracked Concrete Repair jobs while maintaining a professional, fast and efficient service for all our clients.
We will repair your Cracked Concrete to make sure that the foundation and structure of the building are safe, Our team has over 35 years of experience combined with the most skilled and also the most professional Concrete Crack Repair team that Sydney has to offer.
These are two of the many reasons that we are known for and often referred to as the best Cracked Concrete Repair assessment team in Sydney, our concrete teams are trained, certified and insured to work on residential properties, large commercial projects and construction sites.
Hire our specialist team with over 35 years of experience and all the trucks and heavy power tools needed to get the job done quickly, efficiently and affordable.
We’re looking forward to extending to you the same quality results that we’ve become known for throughout the industry.
To obtain a Free Price Beat Guarantee Quote from Sydney’s #1 Concrete Crack Repair team simply fill out our:
Free Online Quote Form!
You can also contact us directly on:
0424 408 330
Or email us at:
for a free quote & site inspection today.
We will ALWAYS Beat All Of Our Competitors Quotes By Up To 10%*