Epoxy-coated rebars positioned at strategically important
substructures and superstructures!

For a variety of reasons, chemicals that are used at strategically important substructures and superstructures, bridges, viaducts, industrial plants, on roads, as well as in various environments and process conditions, or natural factors such as rain water and moisture, or other materials, can reach the reinforcing steel bars that are present within base concrete, concrete platforms, concrete columns and girders, all of which act as a carrier and provide base concrete connection.

urun-ic-rebarWhen this happens, corrosion occurs in these reinforcing steel bars. Reinforcing steel bars within concrete building elements carrying columns, drums, heat exchangers and other steel constructions, are affected by rain, moisture, acidic or base chemical leakages, and corrosive ion carbonate cement paste reducing the pH surrounding the reinforcing steel bars. Corrosive ions in concrete ruin the passive film that is on the surface of reinforcing steel bars and hence corrosion starts.

 

 

Concrete cracks, which occur as a result of volume expansion due to abrasive products resulting from corrosion (rust), speed up the corrosive process leakage entry and allow leakage to reach reinforcing steel bars,

causing both concrete buildings to crack or to lose their concrete features and cross-sections in reinforcing iron bars that are within concrete to be lost.

This results in a decrease of their mechanical strength against the loads they carry.

 

 

 

Epoxy Coating & Corrosion Difference

Repairs resulting from concrete cracks and damages not only exceed the cost of a new reinforcing steel bar, but also costs lives. Epoxy coating, which creates a physical and electrochemical barrier on steel, isolates reinforcing bars and prevents the formation of corrosion.

In the visual on the right you can clearly see the difference between them.

 

 

 

 

 

Raw Material Features

 

World Standard

ASTM A 775/775 M is the most accepted standard throughout the world for epoxy coating of reinforcing bars.

 

Epoxy-coated reinforcing steel within concrete was first used in 1973 on the Schuylkill Bridge near Philadelphia, USA. It was a method to reduce the corrosion damage in concrete buildings, to eliminate problems resulting from thinning in the wall thickness of steel basic fastener projects, or to eliminate problems caused by uncertainty over whether the remaining wall thickness can carry equipment or not.

This application used in North America as a main method to prevent reinforced concrete construction from corrosion is also commonly used in the Middle East and Asia.

 

Rebar Bond Test

Tension tests have been carried out for reinforcing bars according to ASTM A 944-05 and ASTM A775-07. The following table shows the maximum applied load values and the deviation in these values.

BAR NO DESCRIPTION MAXIMUM APPLIED LOAD DEVIATION BONDING FORCE (MPA)
KN TON BACK FACE FRONT FACE
REBAR 1 EPOKSİ KAPLI 1 175,3 17,6 0,10 1,05 9,22
REBAR 2 EPOKSİ KAPLI 2 175,3 17,6 0,07 1,04 9,22
REBAR 3 EPOKSİ KAPLI 3 175,3 17,6 0,06 1,09 9,22
REBAR 4 KAPSIZ 1 169,7 17 0,10 0,64 8,93
REBAR 5 KAPSIZ 2 150,2 15 0,48 0,90 7,90
REBAR 6 KAPSIZ 3 169,7 17 0,73 1,22 8,93

* FUGRO – SUHAIMI DAMMAM / SAUDI ARABIA , FACTUAL REPORT NO:SA13-2043 12/06/2013

 

SYSTEM CORROSION STARTING TIME CONCRETE CRACKING TIME AFTER CORROSION STARTS FIRST CONCRETE REPAIR TIME
UNCOATED REINFORCING STEEL BARS 2.2 YEARS 6.8 YEARS 14 YEARS
STEEL REINFORCING SUPPORTED BY EPOXY COATING 20 YEARS 25 YEARS 50 YEARS
UNCOVERED STEEL REINFORCING WITH CORROSION INHIBITOR 4-6 YEARS 7 YEARS 16-18 YEARS
SYSTEM FIRST CONCRETE COST LIFECYCLE COST
UNCOATED REINFORCING STEEL BARS 226 USD/m² 531 USD/m²
STEEL REINFORCINGSUPPORTED BY EPOXY COATING 234 USD/m² 283 USD/m²
UNCOVERED STEEL REINFORCING WITH CORROSION INHIBITOR 232 USD/m² 504 USD/m²

* Report entitled “Performance of multiple corrosion protection systems for reinforced concrete bridge decks”, published by the University of Kansas in 2011.

 

Production Planturun-ic-uretim

We manufacture our products in our plant in Istanbul.

Our monthly production capacity is 2,000 metric tons and we are able to increase our production capacity to 3,000 metric tons in the event of order intensity.

Due to our production planning, product delivery starts between 15-30 days following the date of order.

 

 

 

Design and Application

urun-ic-astm
Rebar and joint bars significantly increase the efficiency of street surfacing and prolong their life, provided that they are designed and applied correctly.

In the U.S.A and Europe, the use of rebar— produced to ASTM Standards—at airports and on roads appears in specifications as standard.

 

Packaging & Logistics

Before they are dispatched, in general rebars are packaged in special wooden crates prepared on EUR-pallets and covered with PVC lids in accordance with international articulated lorry, vessel and container shipment.

Project

Packaging can be made in any desired form according to project features. In this way, time and cost calculations are targeted.