Factors Affecting Shrinkage of Concrete

  • Humidity (Drying Condition)
  • Water Cement Ratio
  • Hardness of Aggregates
  • Moisture Movement in Concrete
  • Type of Coarse Aggregates
  • Shape of Aggregates

Other factors that have an effect on the magnitude of shrinkage include mix proportions, material properties, curing methods, environmental conditions, and geometry of the specimen. Water content has been found to affect the magnitude and rate of drying shrinkage in concrete. Other factors include elastic properties of the aggregate used in the concrete mix; in general, aggregate with a high elastic modulus will produce low shrinkage concrete. Aggregates which contain clay minerals will affect shrinkage behavior as well.

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