Importance of Stone Chips for Construction

importance-of-stone-chips-for-home-building
Stone chips or Course Aggregator is as important as other construction materials. It is essential to know every fact before you receive the material from the supplier. Aggregates are used as filler with binding materials in the production of concrete.


Aggregates occupy about 70-75% of the volume of concrete and they greatly influence the strength of
concrete. These are cheaper than cement and admixtures. The aggregate imparts the density to concrete. The coarse aggregates form the main matrix of concrete and fine aggregate form the filler matrix between coarse aggregates.

Classification of aggregates: The coarse aggregates classified based on following parameters.
  • Size and shape
  • Unit weight of aggregates
  • Geological origin
  • Parent rock
Details of Information needed for Coarse aggregates: It is very important to collect as many information as listed below for the quality assessment of coarse aggregates.
  • Source of supply
  • Rock type present
  • Presence of any reactive minerals
  • Physical characteristics e.g. specific gravity, bulk density, moisture content, absorption value, etc.
  • Aggregate crushing value or aggregate impact value
  • Abrasion value
  • Elongation - index
  • Flakiness – index
  • Soundness of aggregate
Size and grading of aggregates: Graded coarse aggregates may be supplied normally 20mm, 12.5 to 10 mm and 6 mm sizes to reduce voids. The coarse aggregates need to have
  • Clean and Dense
  • Different mix graded sizes normally angular Shape
  • Hard and Durable
Maximum sizes of coarse aggregates: The maximum size of coarse aggregates should be lower of the following parameters.
  • ¾ of the clear spacing between rebar or between rebar and formwork
  • 1/3 depth of the slab
  • 1/5 the narrowest dimension of a member
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