Natural calamities like earthquake, heavy rains, Floods are unavoidable so do harsh / corrosive atmosphere across coastal area.

We cannot stop these phenomenon but we can build stronger structures that can withstand such blows of nature.

 In last 30 years RCC structures have gained tremendous importance due to their sustainability, ease of work and effectiveness.

RCC rebars being vital part of RCC structures got developed time to time from plain to twisted to TMT and QST technology.

Rust resistance was also considered by the developers and corrosion resistant rebars/ coating were developed.

In all those years one vital part was missing and that is bonding of steel with concrete

In many technical papers and workshops it was stated that application of polymer or epoxy coating on RCC rebars directly compromise its bonding with concrete. It’s proved that up to 35% bonding was dropped due to epoxy coated rebars!

This 35% loss of bonding is compensated by more steel per sq ft.which would not require if proper bonding was there with concrete.

Considering above conditions, effect on bonding and heavy losses of steel due to corrosion per annum we started our work particularly on increasing bonding of steel with concrete. Our main focus was on following point that “Any RCC construction with steel in it requires bonding of steel with concrete and not any coating on the surface like epoxy / polymer”.

After continues research and trials we got our first break through when in pull out test we found coated rebar gave more than 200% higher bonding that uncoated steel with coating thickness of 3-4 micron on the surface so there was no visible change in diameter of rebar and certain corrosion resistance was also noted.

To  summarize, we developed coating with following properties.

1. Very thin and tenacious coating with thickness of 2-10ltr

2. No film formation but the coat is generated by surface with chemical reaction

3. 6-7 times more corrosion resistant coat that uncoated steel

4. No change in diameter of steel

5. Removes rust if any

6. ROHS compliance

7. Avoids spalling of concrete

MODE OF ACTION

When the coating comes in contact with RCC steel the active ingredient form chelate with the iron surface, this crystalline chelate structure, increases contact area of steel with concrete which causes higher bonding of steel with concrete.