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Underpinning is the process of strengthening and stabilizing the foundation of an existing building or other structure. This method is used to restore the structural soundness of members where cracks are dormant or can be prevented from further movements. Epoxies are rigid and not suitable for active cracks.

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Care should be taken to ensure that the entire crack is routed and sealed.Д®poxy resins are usually selected forВ crackВ injection because of their high mechanical strength and resistance to most chemical environments encountered byВ concrete.

This involves enlarging the crack along its exposed face and sealing it with crack fillers. It can be executed with relatively unskilled labor and can be used to seal both fine pattern cracks and larger isolated cracks.

This is the simplest and most common method ofВ crackВ repair.

Non-disruptive structural stabilization with no additional stress.

Masonry remains flexible enough to accommodate natural building movement.

The grout combination provides an excellent bond within the substrate.

Quick, simple, effective and permanent.

Stitching dogs should be of variable length and orientation. Stitching is suitable when tensile strength must be re-established across major cracks. A non- shrink grout or an epoxy resin based adhesive should be used to anchor the legs of the dogs. In this technique, the crack is bridged with U-shaped metal units called stitching dogs before being repaired with a rigid resin material. Read descriptions about each of them below Stitching of Concrete Various types ofВ Repair Methodologies are covered in this powerpoint presentation such as Concrete Crack Repair Techniques PowerPoint Presentation - (Download FREE!) Files > Download Concrete Crack Repair Techniques PowerPoint Presentation - (FREE!)

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