Chemical Injections

PRESERVING THE STRUCTURE NOW
AND IN THE FUTURE
Click on images to enlarge

The attempted methods for resolving water penetration include the installation of trays and the application of epoxy coatings to the underside of the leaking concrete surface.

WHY THESE METHODS DON'T WORK!

The fixing of 'catch trays' to collect the water and then drain away merely disguises the water leaks and does nothing to fix the problem.

The coating of epoxies has proven to be ineffective when treating leaks.

The fact remains that half measures such as these do not address the damage that is occurring within the concrete structure created by the reaction of the water with the steel reinforcement.

ONLY CHEMICAL INJECTION SOLVES THE PROBLEM

Even when the water is prevented from entering the concrete and the leak has ceased, the remaining moisture content continues to react with the steel reinforcement which continues impacting upon the structural integrity.

Through pressure chemical injection the low viscosity Hydrogel penetrates into the crack, encapsulates the reinforcing bar and cures to form a flexible protective seal.

Chemical Pressure Injection

Thinking "Outside the square" is an approach on which Consolidated Quality Projects thrives. Consolidated demonstrates progressive waterproofing solutions to property owners and asset managers.

CORROSION PROTECTION

Cracks in concrete balconies can, more often, be concealed by paint and tiled finishes.

If the cracks remain unnoticed water containing contaminants such as salt and/or atmospheric pollution is able to enter the concrete. Once the water comes in contact with the steel reinforcement a "time bomb" starts ticking.

The severity of corrosion is dependant upon the amount of air that is required to provide the oxygen necessary for the chemical reaction resulting in rust to occur on the surface of the steel element.

By encapsulating the steel, oxygen is restricted and water is unable to make contact. Encapsulation can be effected by Chemical Injection which involves the pressure injection of gels that cure to form a flexible barrier that effectively protects steel against corrosion.

Waterproofing Systems
for
Concrete Structures

Leaks in concrete structures can range from seepage through cracks in residential basements to torrents of water pouring through a dam.

To solve concrete leaking problems, repair specialists, CONSOLIDATED QUALITY PROJECTS must determine the technique to stop the flow of water. These can fall into 3 broad categories.

Reinjectable Hose System -

Installed into the concrete structure as part of the Waterproofing design.

Polyurethane grouts -

Reacts with water to form a chemical water stop expanding into voids and crack capillaries.

Hydrogels -

Very low viscosity which swells in contact with water, is solvent free and for permanent solutions.

Despite the variety of unique problems that may exist on each project, most concrete leaks have one thing in common. They can be controlled through the strategic use of injection systems.

Polyurethane grouts and Hydrogels have been used as specialty materials for sealing leaking cracks into concrete structures for about 20 years.

All concrete shrinks!

		Cracks
		Leaking joints
		Repairs

PROBLEMS:

	Drying Shrinkage		Poor vibration
	Thermal stresses		Corrosion of the reinforcement
	Chemical attack		Different types of loading

SOLUTION: CHEMICAL INJECTION

The chemical injection experts at Consolidated Quality Projects are able to waterproof crack in:

	Basements		Retaining Walls
	Car Parks		Tanks
	Swimming Pools		Tunnels

INJECTION SYSTEMS

FOR EVERY PROBLEM THE RIGHT SOLUTION

TUNNELS - The concrete roof of the rail link tunnel passing under the Cooks River experienced 'map' cracking. The permanent sealing of the cracks was achieved quickly and economically through Hydrogel injection.

LIFT PITS - The combination of waterproofing membrane failure and poorly vibrated concrete resulting in a continually leaking lift pit. The cracks and voids in the structure made the waterproofing additive to the concrete ineffective. The problem was solved through Hydrogel injection.

BASEMENT CARPARKS - Insufficient waterproofing design and poor building practice created the situation where the basement constructed below water table leaked when the dewatering pumps were removed. The active leaks were sealed by a combination of Polyurethane and hydrogel injection.

Hose pipe injection system
seals concrete joints

When building structures in concrete treated with a waterproofing additive it is essential to design the joints.

The joints should be in such a way that crack formation is virtually excluded. Conventional construction joints often leak as a result from:

	Waterproofing membrane failure
	Poor building practice
	Poor concrete compaction

The design of an injectable hose system into critical concrete joints offers a long term economical waterproofing system that is protected from construction damage, can be re-injected and tested for leakage by injecting water.

PROJECT PROFILE
"PANORAMA TOWERS"

Parking accommodation for the residents of three 8 storey buildings positioned on the original site of the Gosford Quarries is provided for in a multi-level basement car park. the roof of the basement has additional parking and tropical landscaping.

The original construction did not include for waterproofing of the structure. Consequently, shrinkage cracks in the concrete has allowed water penetration resulting in stain damage to the cars underneath and attack on the concrete reinforcing steel making the structure weaker.

The repair option was to demolish the landscaping, install a waterproofing membrane system and reinstate the landscaping and concrete tarmac. The estimated cost to carry out the work was .55 million dollars.

The solution was to inject Hydrogel into the cracks from underneath for less than 10% of the estimated waterproofing rectification cost, and without the disruption and delays associated with demolition.

The result was another satisfied customer. the owners were surprised to unexpectedly realise that the value of their property increased when the problem of the leaking basement car parking was finally solved.