Structural Repair:

 

More and more old building & structures are being reused keeping some of the beautiful old architectures. Plus there are substantial increase in the amount of repair work now being carried out on reinforced concrete structures not withstanding that a large number of reinforced concrete structure are now coming of age and requiring repair works.

 

This is where we can help restoring your project and assisting your structural engineer.


We offer the following:
 
Building/Sturctures

We work mainly in refurbishment projects such as listed buildings or concrete structures, Bridge work where enabling works with respect to the structure required, prior to the start of the main project:


  • Concrete structure
    Stone works
    Brick works
    Timber works

  • Bridge works

Some of the works we do in structural Repair & Structural Strengthing

Concrete

Strengthening of defected RC beam, column, etc.
Use of FRP (Fibber Reinforced Polymer)&CFRP (Carbon-Fibber-Reinforced Polymer)
materials have gained acceptance for civil engineering infrastructure as a result of substantial research and development efforts over the past 20 years.
FRP is an attractive choice for strengthening structures since it is often cost-effective, easy and quick to install, and does not significantly affect the mass or geometry of a structure.


FRP Fabric

FRP fabric is easily tailored to fit any geometry

FRP

Additional tension reinforcement increases the flexural

 strength of slabs when FRP is adhered to the tension side

 

FRP composites vary in strength depending on the type of fibber used.
 
While glass provides a tensile strength nearly equal to mild steel yield strength, carbon composites (CFRP) provide a tensile strength that vary from twice to five times the yield strength of mild steel. While both FRP composites have tensile stiffness lower than that of steel, carbon composite stiffness is twice to five times the stiffness of glass composites. FRP composites have approximately one fifth the weight of steel.

 

Installation of CFRP

Installation of CFRP on an industrial silo

FRP Application systems provide a very practical tool for strengthening and retrofit of concrete structures, and are appropriate for:

 

Support for bending stress
Shear strengthening
Column confinement and tensile strenght improvment

FRP systems have also been successfully used for seismic upgrading of concrete structures. These applications include mitigating brittle failure mechanisms such as shear failure of unconfined beam-column joints, shear failure of beams and/or columns, and lap splice failure. FRP systems have also been to confine columns to resist buckling of longitudinal steel bars. These FRP schemes increase the global displacement and energy dissipation capacities of the concrete structure, and improve its overall behaviour.

Because of the resistance to corrosion, FRP composites can be utilized on interior and exterior structural members in all almost all types of environments.

 

CFRP reinforcement

CFRP reinforcement on parking garage beams

 

FRP composites are designed to last for the service life of the structure

 

General use of FRP:
FRP systems have been successfully used to strengthen buildings, bridges, silos, tanks, tunnels, and underground pipes.

 

 


Underpinning:

Underpinning is a method used to increase foundation depth or repairing faulty foundations.

Cracking:

Cracks can appear vertically or horizontally in concrete wall, column or,…

 Flooring
Fine Crack Repair: is a solvent free, low viscosity epoxy resin designed for filling smaller cracks, voids and thin section "blow outs" or craters in concrete floors.
Epoxy Adhesive Paste:
For bigger horizontal joints. Hard and tough enough to protect joint edges from heavy wheel loading, but possesses sufficient flexibility to accommodate 10% movement of the joint width.
Flexible Joint Filler
Where cracks are deep we suggest using Flexible Joint Rods which are foam strips to 'pack out’ before using Flexible Joint Filler.
Elastomeric repair paste; specially developed and with a high degree of flexibility for use as a caulking compound and joint filler. This product is used for larger cracks or opening.

 

 

 

Brick works
RP Paste & Rod: In the case of old brick structure when it comes to restoration and repair there is the need for flexibility, and use of GRP materials exactly does that providing structural repair.

 

Brick work repair

GRP paste being injected into the joint

Brick work repair GPR

Brick joints filled with GRP in a listed building

The Brick stitching system:

allows the cracked wall to behave as a reinforced non-fractured unit.  Having a galvanised steel bar shaping the crack stitch rods physically interlock with the bonding agent and display a unique and resilient torsional spring-like quality that allows small amounts of wall movement and recovery to occur without brittle failures.

 

stitching brickwork

Galvanised twisted bar in the bed joint

 

Incorrect pointing
Inappropriate mortar mix can cause problems in both the mortar and the stone itself. The main problem is usually related to having too strong a mortar. This can be corrected by use of correct mix and jointing.

 

 


Stone
Similar to work on Brickworks, Helifix or similar product is installed into the bed joints of a stone wall. The galvanised bar is flexible to allow it to follow the contours of the cracks. The bars are being bedded in high strength grout which will be left recessed ready to be pointed so that only the mortar pointing is left visible. These bars are used to reinforce and tie the building back together.

 

 

Cracked bed joint in a stone wall is prepared to install twisted galvanised bar

 

 

We use various products to carry out the repair works such

Sika     

 

Picture gallery of previous projects

 

 

 

 

 

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