Techniques to Repair and Restore Strength of Structural Members




When structure is gets damaged it is essential to restore original strength of building so that it can continue to serve the purpose. It is necessary to locate the damages and repair them to restore the original strength of structures. These repair works can be done in many ways.

Repair of Small Cracks

Small cracks can be repaired by injection of epoxy. Surface can be cleaned and make it dust free. Place the plastic ports along the crack surface on both sides of the member and secure it in place with an epoxy sealant. When the sealant has cured, inject the epoxy resin beginning the lowest part of the crack at one part at a time in case of vertical or at one end of the crack in case it is horizontal structural member.

It should be remembered that the distance between ports should be more closely spaced as the cracks gets smaller and pressure of injection should be higher. This is to ensure that epoxy is injected throughout the length of the crack.

This technique is used for all types of structural elements- beams, columns, walls and floor units in masonry as well as concrete structures to restore the original strength.

Repair of Large cracks and crushed concrete

Remove the loose material and clean the surface of the concrete cracks, replace the crushed concrete or masonry with expansive cement mortar, quick setting cement or gypsum cement mortar.
Provide shear reinforcements wherever necessary in the region of repairs. Cover this reinforcement with mortar. This will provide strength as well as protection to the reinforcement.

For severely damaged concrete or masonry members, the complete damaged portion is removed and replaced with shear reinforcement.

Repair of Fractured, excessively yielded and buckled structural member

When a structural member is buckled or excessively yielded, its reinforcement would have buckled or elongated or excessively yielded. In such case, the structural member can be repaired by removing the damaged concrete portion and cutting the yielded portion of the reinforcement.

Then new reinforcement bars are used as replacement and welded to the old portion of the reinforcement steel. Damaged concrete is replaced with fresh concrete. 

Repair of Fractured wooden members and joints

Wooden structural members can be easily repaired. To restore the original strength structural members made of wood such as beams, columns, struts and ties can be done by splicing additional material.

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Blog written by

Shruti Doshi
Technical Officer – Sanghi Cement & Blogger
shruti.doshi@sanghicement.com
shrutidoshi.1492@gmail.com

Blog Managed by

Nirav Pandya
Digital Marketing Officer – Sanghi Cement
nirav.pandya@sanghicement.com




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