The ConLife is tested by APERL (Andhra Pradesh Engineering Research Laboratory) which is working under Irrigation Department Govt of A.P. The test report citified that ConLife is having higher corrosion resistant properties and increases bonding between the concrete and steel rebars.
The product utilized by Panchayath Raj Department of its R.W.S works and send a copy of remarks that ConLife is working well for corrosion resistance to the steel in reinforcement.
AP State housing corporation Ltd, utilized the product for Nirmithikendra Products and certified that ConLife is a good corrosion resistant admixture without side effects to the concrete.
Corrosion with rusting of reinforcement in concrete comprises two stages. In a first stage (or step), the aggressive elements, such as chloride or carbon dioxide (CO2) (Cl-), present in the surrounding medium, penetrate in concrete. This is the initiation stage. The second stage is propagation which starts, when these aggressive bodies are in rather high concentrations at the reinforcement level. This corresponds to the rust growth, which can break concrete cover.
– a first stage involves the transfers of aggressive agents (mainly carbon dioxide and chloride) of water and of oxygen, inducing the Corrosion initiation (depassivation of reinforcement),
– a stage of Corrosion growth, leading to concrete damage, to spalling, cracks, etc. This stage starts when the contents of aggressive agents are high enough closed to reinforcing steel.
So, to describe steel Corrosion in concrete, it is advisable to define, on the one hand, the penetration of the aggressive agents through concrete and, on the other hand, the conditions of depassivation of reinforcement, then the dissolution rate of metal and the rust growth.
