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Waterproofing & Concrete Failure

Incorrect selection of waterproofing may result in its failure and ultimately the failure of concrete it should protect.

Concrete Is Porous

Concrete is porous acting like a sponge.

It contains entrapped voids, pores, capillaries and cracks at both the mirco and macro level.

High porosity is often due to poor compaction, no or poor curing, mix design, shrinkage cracks, high water cement ratios and other factors.

Concrete by its very nature allows gases, moisture, salts and water to attack it.

Concrete Is Porous

Porous Concrete

Concrete is porous acting like a sponge.

It contains entrapped voids, pores, capillaries and cracks at both the mirco and macro level.

High porosity is often due to poor compaction, no or poor curing, mix design, shrinkage cracks, high water cement ratios and other factors.

Concrete by its very nature allows gases, moisture, salts and water to attack it

Sulphate Attack

Porous concrete allows salt bearing water to enter and react with the by products of cement hydration.

An example being sulphate salts that carried by water enter the cement paste and react with it to form etteringite and gypsum which expands, softens and destroys the cement paste leading to an ongoing process of deterioration.

Sulphate Attack

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Porous concrete allows salt bearing water to enter and react with the bi products of cement hydration.

An example being sulphate salts that carried by water enter the cement paste and react with it to form etteringite and gypsum which expands, softens and destroys the cement paste leading to an ongoing process.

Chloride Attack

Permeable concrete in salt laden enviroments such as marine, salt flats or winter deicing salt allow chloride ions to penetrate and reach the reinforcement. In the presence of water and oxygen the reinforcement starts to corrode

Chloride Attack​

Chloride Attack

Permeable concrete in salt laden enviroments such as marine, salt flats or winter deicing salt allow chloride ions to penetrate and reach the reinforcement. In the presence of water and oxygen the reinforcement starts to corrode

Carbonation

Concrete has an alkaline environment which passivates the reinforcement preventing it from corrosion.

Gases in the environment such as carbon dioxide when combined with rain water enter the concrete decreasing the pH causing the passivity to be lost and beginning the process known as carbonation which allows for corrosion of reinforcement.

Carbonation

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Concrete has an alkaline environment which passivates the reinforcement preventing it from corrosion.

Gases in the environment such as carbon dioxide when combined with rain water enter the concrete decreasing the ph causing the passivity to be lost and beginning the process known as carbonation which allows for corrosion of reinforcement.

Cracking

Cracks in concrete are lines of weakness allowing water ingress into the structure. Besides damaging finishes & interiors of buildings water carries with it elements that attack cement paste & corrode reinforcement leading to serious structural issues.

Cracking

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Cracks in concrete are lines of weakness allowing water ingress into the structure. Besides damaging finishes & interiors of buildings water carries with it elements that attack cement paste & corrode reinforcement leading to serious structural issues.

SOLUTION

To mitigate against these deleterious process crystalline waterproofers that densify and seal the concrete offer benefites beyond that of normal waterproofing providing permanent, crack sealing and corrosion resistance as well as water – tightness. They improve the concrete itself.

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