Normal Concrete

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  • The concrete in which common ingredients i.e. aggregate, water, cement are used is known as normal concrete. It is also called normal weight concrete or normal strength concrete.

  • It has a setting time of 30 – 90 minutes depending upon moisture in atmosphere, fineness of cement etc.

  • The development of the strength starts after 7 days the common strength values is 10 MPa (1450 psi) to 40 MPa (5800 psi). At about 28 days 75 – 80% of the total strength is attained.

  • Almost at 90 days 95% of the strength is achieved.

     Properties of Normal Concrete

  • Its slump varies from 1 – 4 inches.

  • Density ranges from 140 pcf to 175 pcf.

  • It is strong in compression and weak in tension.

  • Air content 1 – 2 %.

  • Normal concrete is not durable against severe conditions e.g. freezing and thawing.