Concrete Cancer Repair Options
Concrete Cancer Repair
Concrete cancer repair is required where concrete spalling and cracking problems appear. This caused by steel reinforcement corrosion in buildings and concrete structures caused by the acidification of the concrete.
To identify the presence of cancer of concrete or spalling. Cracking is noticed in building areas such as concrete balconies, building facades, bridges or wharf structures. The problem as arisen due to lack of waterproofing and protection of the concrete from carbonation of the building structure. Diagnostic analysis by a qualified engineering firms can help to identify the exact causes of the cracking or cancer problem and specify the correct rectification or concrete repair solution.
Failure to have sufficient concrete cover of the steel reinforcement and other areas poor workmanship during construction can result in ingress of carbon dioxide & moisture into the steel reinforcement bars causing corrosion due to concrete carbonation increasing the acidity, or ingress of chloride ions into the concrete forming electrolytic cells causing reinforcement corrosion are some of the causes of concrete cancer, indicated initially by concrete spalling and cracking.
The value of a professional opinion is enhanced by advice from experienced trade persons. Concrete repair contractor. The materials specification provided by the best building maintenance repair materials supplier. The resultant repair solution restores the concrete to its original form in most cases. The main part of the repair cost is usually due the ability to gain access and labour. Using an incorrect specifications and building repair materials can result in the repairs and cancer retreated. Retreating is a costly exercise instead of a once off long-term treatment of the concrete building structure.
Two Types of Treatment for Rectifying Concrete Cancer.
- Concrete Carbonation Due to Poor Concrete Cover or Crack Formation –
The repair solution involves a repair system. Remove all of the concrete in and around the spalled areas. Leaving only uncarbonated concrete behind the steel reinforcement exposed. Remove the corrosion from the reo bars and clean.
Drizoro Maxrest Passive is applied to corrosion free steel reo bars, to prevent further corrosion. Once cured the application of a primer or slurry coat of Drizoro Maxrest. Apply the Drizoro Maxrest Mortar in 2.5cm layers. No formwork required. The Drizoro Maxrest also helps restore the high alkalinity of the original concrete which gives the concrete cancer repair greater longevity.
Then a waterproof membrane coating of Drizoro Maxseal Flex or Drizoro Maxseal provides the anti-carbonation protective coating to the entire concrete area. - Chloride Ion Contamination of the Concrete – commonly problematic for structures and buildings located near coastal areas. Rectification of concrete is more complex and may involve special concrete repair solutions. Removal of chloride by washing. Protection of steel reo bars is crucial. Protective membranes to prevent ingress of Chloride. Drizoro use Maxrest passive to protect reo. Then layers Maxrest quick setting mortar. Protect the repaired concrete with a waterproof layer of Maxseal. Cathodic protection used in very harsh conditions. Drizoro Maxseal Cementitious Membranes range are ideal after any concrete repair.
They are also recommended for all repairs using the recommendation in 1.
10 Reasons Why is Drizoro is Best for Repairing Spalling Concrete.
- Drizoro product s are compatible to use on any concrete or masonry structure or surface.
- Helps to restore structural integrity as it forms part of the substrate
- NO form work required since typically Drizoro Maxrest DOES NOT SLUMP.
- Don’t have wait till surface is completely dry as the Drizoro products require a damp surface as it becomes part of the original concrete surface
- Quick-setting time, from 15 to 20 minutes allows a fast repair process.
- repairs are structurally sound, with properties comparable or higher than concrete
- Does NOT SHRINK or crack when setting
- Drizoro products are suitable for use in badly ventilated places. Odour free and non toxic. Examples – water tanks, shafts, sewers etc
- Does not contain any chloride
- No complicated components just add water.
With All that Cracked and Failing Concrete -a Difficult Repair Ahead
