Research has made it possible to significantly improve the strength and durability of concrete without a great increase in cost. As a result of the research “Concrete technology” has under gone from a macro to a micro level study in the enhancement of strength and durability. By bringing about changes in the micro structure of concrete, strength of concrete as a whole can be improved.
The Magnetic Resonance Imaging (MRI) of a concrete block clearly indicates three components of which concrete is made of. Hence the three components of which a concrete hardened block is made up are:
3. Transition zone: Weakest zone (Extensive research is being made to improve properties of this zone)
Knowledge of the micro structure and properties of the individual components of concrete and their relationship to each other is useful for exercising control on the properties of Concrete.
• It is possible to modify the properties of concrete by making suitable changes in the micro structure.