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Properties of concrete are influenced by many factors mainly due to mix proportion of cement, sand, aggregates and water. Ratio of these materials control the various concrete properties which are discussed below.Properties of Concrete
Different properties of concrete:- Grades (M20, M25, M30 etc.)
- Compressive strength
- Characteristic Strength
- Tensile strength
- Durability
- Creep
- Shrinkage
- Unit weight
- Modular Ratio
- Poisson’s ratio
1. Grades of concrete
Concrete is known by its grade which is designated as M15, M20 etc. in which letter M refers to concrete mix and number 15, 20 denotes the specified compressive strength (fck) of 150mm cube at 28 days, expressed in N/mm2. Thus, concrete is known by its compressive strength. M20 and M25 are the most common grades of concrete, and higher grades of concrete should be used for severe, very severe and extreme environments.2. Compressive strength of concrete
Like load, the strength of the concrete is also a quality which varies considerably for the same concrete mix. Therefore, a single representative value, known as characteristic strength is used. Also Read:Â Compressive strength of concrete cubes3. Characteristic strength of concrete
It is defined as the value of the strength below which not more then 5% of the test results are expected to fall (i.e. there is 95% probability of achieving this value only 5% of not achieving the same)![Properties of Concrete Properties of Concrete](jpg/properties-of-concrete2cfb.jpg)