Figure 1-6. Correct and incorrect aggregates handling and storage. (continued)
ADMIXTURES
Definition and Purpose
An admixture is any material other than cement, water, or aggregate that is added to concrete
in small quantities, either immediately before or during mixing, to modify such properties
as workability, strength, durability, watertightness, or wear resistance.
Admixtures can also
reduce segregation and the heat of hydration and entrained air and either accelerate or
retard setting and hardening. You can often obtain similar results by changing the concrete mix
1-15
EN5466
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