Technical Questions

ACI Committees, Membership, and Staff have answered common questions on a variety of concrete related topics.

The effect of aggregate characteristics on concrete shrinkage and permeability

Q. How do the aggregate characteristics affect the permeability and shrinkage of concrete?


A. The aggregate characteristics are important to permeability in relation to the reduction in w/cm and paste content,

which leads to lower permeability. If the water content is reduced or the elastic modulus is increased due to the aggregate characteristics, this should lead to a reduction in drying shrinkage.


References: SP-1(02); SP-108; E-1(16); ACI 221R-96; ACI 214R-11; ACI 209.1R-05; ACI 213R-14; ASTM C1202; ASTM C596

Topics in Concrete: Aggregate; Concrete Fundamentals; High Performance Concrete; Permeability; Shrinkage

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