Technical Questions

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



Factors affecting cement properties

Q. Are the hydration reactions and the resulting properties of the cement affected by differences in raw materials or proportions of phases in the clinker?

 

A. Yes. Increasing the proportion of lime to silica, for instance, increases the rate of gain in strength and also the rate at which heat is liberated. Also, the resistance of concrete to sulfate attack is generally inversely proportional to the tricalcium aluminate (C3A) content in the cement (ACI 225R).

 

References: SP-1(02); ACI 225R-19; E3-13; ASTM C150; ASTM C595; ASTM C1157

Topics in Concrete: Cementitious Material; Concrete Fundamentals

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