Properties of concrete:
Properties of concrete are generally classified into two categories. One in properties of concrete in plastic state and the other is properties of concrete n hardened state.
Properties of concrete in plastic state:
The Properties of concrete in plastic state are discussed below:
The concrete should have good workability. It is defined as the ease with which it can be mixed, transported and placed in position in a homogenous state. It depends upon the quantity of water, grading of aggregate and percentage of fine materials in the mix.
The concrete should be free from segregation. It is defined as the breaking up of cohesion (separation of coarse aggregates) in a mass of concrete. It results in honey combing, decrease in density and ultimately loss of strength of hardened concrete.
The concrete should have no bleeding. It is defined as the separation of water or water cement mixture from the freshly mixed concrete. It causes the concrete porous and weak.
It Is the resistance offered by concrete to its surface finishing. The surface of harsh concrete remains rough and porous.
Properties of concrete in hardened state:
The properties of concrete in hardened state should have the following properties:
The hardened concrete should have high compressive strength so that it can resist the heavy loads of of the structure.
The hardened concrete must have durable to resist the effects of rain, frost action. The property is mainly affected by the water cement ratio.
The hardened concrete should have sufficient impermeability or water tightness so that it can resist the entry of water inside the structure.
The hardened concrete should exhibit minimum shrinkage. This property is guided by water cement ratio.
The hardened concrete should be subjected to minimum creep. It is the continuous strain, which the concrete undergoes due to application of external loads.
The hardened concrete should have minimum thermal expansion so as to provide good resistance to fire.
I hope that this article will help you to understand about WHAT ARE DIFFERENT PROPERTIES OF CONCRETE whether it is in plastic state or in hardened state.