Description

Structural cracks are opened in v groove manner, cleaned and sealed with epoxy putty and grouting nozzles are fixed at specified intervals.

The injection ports are then filled under pressure with epoxy grout till rejection. To improve upon the microstructure of concrete pressure grouting either with microfine cement, epoxy, very low viscosity epoxy grouts is carried out for RCC elements such as columns, beams and slab. Gravity flooding at a specific dosage with monomer’s is carried out from over the slabs.

Further existing structural cracks are to be strengthened by using various repair and retrofit systems

For a structure under repairs steel is usually affected by corrosion; loose rust scales are removed preferably all around the bar using abrasive tools or sand blasting and stabilized for rust formed with suitable rust convertors; then a protective coating is applied over the rebars such as alkaline cement polymeric coat, epoxy phenolic coat or zinc rich paint, etc. Considerably lost rebar sections are replaced with new bars with sufficient lap on both ends.

The lost RCC Section is then rebuilt using PMM, Thixotropic repair mortar or micro concrete casting with bond coats or shearkeys used as an effective medium for transfer of loads.