Technical Questions

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



What is the basis of proportioning to ensure concrete of the desired weather resistance?

Q. What is the basis of proportioning to ensure concrete of the desired weather resistance?

 

A. The w/cm to be selected for different types of structures for a wide variety of exposure conditions is given in ACI 211.1. For severe exposure conditions only air-entrained concrete is to be used. Where strength requirements indicate that lower w/cm are needed, the lower limits, of course, should govern.

 

References: SP-1(02); ACI 211.1-91; ACI 212.3R-16

Topics in Concrete: Admixture; Mixture Proportioning

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