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Sea Dredged Gravel versus Crushed Granite as Coarse Aggregate for Self Compacting Concrete in Aggressive Environment

Authors
Publisher
Nordic Concrete Federation
Publication Date
Keywords
  • Self Compacting Concrete
  • Coarse Aggregate
  • Sea Dredged Gravel
  • Crushed Granite
  • Mechanical Properties
  • Modulus Of Elasticity
  • Compressive Strength
  • Splitting Tensile Strength
  • Flexural Strength
  • Durability
  • Freeze-Thaw Scaling Resistance
  • Porous Flint

Abstract

Properties of self compacting concrete (SCC) with two types of coarse aggregate - sea dredged gravel with smooth and rounded particles and crushed granite with rough and angular particles - have been studied. Sea gravel allowed a higher aggregate proportion in the concrete leading to a higher modulus of elasticity. Tensile and compressive strength were found to depend both on aggregate type and on the properties of the interfacial zone close to the aggregate surface. Freeze-thaw scaling resistance was good with crushed granite, whereas sea gravel led to more severe scaling caused by porphyry and iron-bearing sandstone particles - but not by porous flint particles.

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