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    Posts in Crack Injection

    Concrete Crack Injection

    March 12th, 2019 Posted by Blog, Concrete Repair, Concrete Repairs, Crack Injection 0 thoughts on “Concrete Crack Injection”

    Cracks in concrete need to be repaired as they are a potential threat to the viability of the steel reinforcement within the concrete structure due to the ingress of water. Water quickly causes the internal reinforcement to corrode, expand and cause the encasing concrete to fracture and break away.

    Early treatment will prevent this process from taking place and enable the injection of epoxy resins or polymers into the cracks. Once the process of corrosion is allowed to occur then a costly repair is necessary and the steel reinforcement needs to be treated or replaced to prevent failure of the structure due to a recurrence of the corrosion process or the need for further expensive repairs.

    THE CRACK INJECTION PROCESS

    The surface of the concrete is first cleaned along the crack. Loose material and contaminants are removed. The crack is the cleaned out to remove any material so that the resin or polymer can flow freely into and along the crack.

    Resin is then injected under pressure either into injection ports which have been place at intervals along the crack. Crack injection is a skilled task and should only be undertaken by experienced tradesmen.

    Crack injection may be undertaken using a pump to apply pressure or using a hand pressure gun.

    FCS Concrete Repairs are specialists in Crack Injection and Concrete Repair. There are a variety of repair processes and materials available and FCS Concrete Repairs are experienced in selecting the appropriate process and the specialist material required to carryout an effective repair.

    A Truism: Modern Concrete Cracks and Concrete Leaks!

    October 2nd, 2017 Posted by Blog, Concrete Repair, Concrete Repairs, Crack Injection, Main Feature, Projects 0 thoughts on “A Truism: Modern Concrete Cracks and Concrete Leaks!”

    There are four types of concrete!

    Concrete that can crack!

    Concrete that has cracked!

    Concrete that can leak!

    Concrete that has leaked!

    Truism: This observation is obviously true and says nothing new or even interesting about concrete but if you have a problem and need a solution then:

    TALK TO THE DIRECTORS AT FCS CONCRETE REPAIRS.

    They are ready to help you!

    When does concrete crack and leak?

    Shrinkage cracks may occur when water evaporates from the concrete soon after it is layed during the drying process. (that is, the curing process) Hot weather can cause rapid evaporation if curing compound is not properly used to slow the evaporation and cold weather can slow the evaporation process. Fine cracks give the opportunity for water to penetrate the concrete and cause the steel reinforcement to rust and concrete degradation.

    Structural cracks when the concrete structure is over-loaded or subject to design flaws will allow water to penetrate the concrete and cause the steel reinforcement to rust leading to concrete degradation.

    Concrete cancer cracking when water penetrates into the concrete and causes the internal steel reinforcement to corrode, expand and cracks form from within allowing water to leak through the concrete element.

    Concrete cracking when the sub-base is inadequate or a washout occurs allowing water to flow under and through the concrete element.

    Soil movement below the sub-base due to natural movement or the expansion and contraction of the underlying clay earth in times of heavy rain or drought allowing water to flow below and washout the concrete element.

    Cracking due to freezing conditions followed by thawing which may also cause expansion and contraction and allow water to leak through and below the concrete element.

    Hot summers can cause cracking due to expansion of the concrete and allow the ingress of water.

    Washouts behind retaining walls may also result in structural cracking and gushing leaks.

    HEADLINE NEWS!

    Fortunately, experienced Concrete Repair Contractors like, FCS Concrete Repairs, have the solutions. Experienced tradesmen, high-tech equipment and repair materials, and technical knowledge can combine to provide near permanent solutions to concrete cracking and leaking. Early intervention is also critical in enabling effective repair and cost effective solutions.

    What can be done?

    Badly damaged concrete can be replaced BUT this can be costly and involves:

    • Investigation
    • Demolition
    • Removal
    • Replacement

    Modern crack injection methods can provide a cost effective alternative solution:

    • Polyurethane injection

    Single component hydrophobic foam can be injected to stop water infiltration and to stop high pressure flowing water and to fill voids behind the structure or joints or cracking in concrete.

    Two component hydrophobic rapid setting foam can be injected. This foam is highly reactive, high strength and expands up to ten times when in contact with ground water.

    • Polyurea Silicate

    Two component low density foam to fill cavities provides structural strength and flexibility to stabilise strata.

    • Acrylic

    One component water based acrylic joint sealant and gap filler which has low adhesive and compressive strength, but high tear strength.

    • Cementitious Grout

    A combination of cement and water, plus admixes or additives to alter their properties. There are three main types – pure cement mixes (PCMs) composed of cement and water, admixed cement mixes (ACMs) composed of PCM and admixtures, and additive cement mixes (ADCMs) composed of ACM and additives.

    • Epoxy injection

    Two component, low viscosity, solvent free, moisture insensitive, structural epoxy injection resin used to seal cracks and cavities and forms an effective barrier against the infiltration of water and bonds concrete to restore structural integrity. Doesn’t bond as well to wet surfaces.

    FCS Concrete Repairs has the expertise to investigate, test, diagnose and recommend on the most appropriate and cost effective solution to your concrete cracking and leaking problem.

    Warragamba Pipeline Support Base Slab

    Warragamba Pipeline Support Base Slabs

    March 13th, 2017 Posted by Crack Injection, Projects, Water Storage 0 thoughts on “Warragamba Pipeline Support Base Slabs”

    Client: Water NSW
    Project: Warragamba Pipeline Support Base Slabs
    Location: Orchard Hills NSW
    Scope: Excavate, membrane, steelfixing and place & finish concrete to Pipeline Support Base Slab

    Water Storage Tank Crack Injection

    March 11th, 2017 Posted by Crack Injection, Projects, Veolia Water Solutions, Water Storage 0 thoughts on “Water Storage Tank Crack Injection”

    Client: Veolia Water Solutions
    Project: Water Storage Tank Crack Injection
    Location: Bingara Gorge NSW
    Scope: Tank floor repairs crack injection. Apply Nitomortar AP epoxy paste over the V cut then inject NItofill LV

    Quakers Hill Sewage Treatment Plant

    January 22nd, 2017 Posted by Crack Injection, Epoxy Coating, Projects, Sewerage Infrastructure, UGL 0 thoughts on “Quakers Hill Sewage Treatment Plant”

    Client: UGL
    Project: Quakers Hill Sewage Treatment Plant
    Location: Quakers Hill NSW
    Scope: Crack Injection & Epoxy Coating to Concrete Sump with HDPE

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