HCM Engineering has also pioneered into the field of bridge structure rehabilitation and strengthening. The first such project was the Tarhuna-Ben Waled Road, Libya in 2008 where it undertook the structural repairs of 19 bridges, 20 box culverts and 74 pipe culverts located along the stretch of the road project.
The rehabilitation works for the highway structures include :
- Condition assessment and material deterioration survey for concrete elements of a bridge.
- Crack repairs by rigid and flexible bonding of concrete cracks by application of concrete chemicals in the form of epoxies and polyurethane sealants.
- Concrete grouting using high strength polymer modified grouts or shrinkage compensated microconcrete.
- Bridge jacking to accommodate bridge bearing pads replacement.
- Anti-corrosion treatment of the reinforcing bars using corrosion inhibitors coating, sacrificial zinc anodes and protective coatings.
- Application of protective coatings using anti-carbonation coating to exposed concrete surfaces.
- Strengthening work by application of high strength Carbon Fibre Reinforced Polymers (CFRP) to increase flexural and shear capacity of structural members.