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Q. What is the effect of water-reducing admixtures on drying shrinkage? A. Very little. Although the use of water-reducing admixtures will permit a reduction in water content of the concrete mixture, it will usually not result in a decrease in drying shrinkage. Actually some of the admixtures may even increase the early shrinkage; although, later shrinkage will be about the same as that of comparable mixtures without the admixture (ACI 224R). References: SP-1(02); CCS-0(16); E4-22; ACI 212.3R-16; SP-288; ACI 224R-01 Topics in Concrete: Admixture; Concrete Fundamentals; Durability; Shrinkage
Q. What is the effect of water-reducing admixtures on drying shrinkage?
A. Very little. Although the use of water-reducing admixtures will permit a reduction in water content of the concrete mixture, it will usually not result in a decrease in drying shrinkage. Actually some of the admixtures may even increase the early shrinkage; although, later shrinkage will be about the same as that of comparable mixtures without the admixture (ACI 224R).
References: SP-1(02); CCS-0(16); E4-22; ACI 212.3R-16; SP-288; ACI 224R-01
Topics in Concrete: Admixture; Concrete Fundamentals; Durability; Shrinkage