Title:
Properties of Self-Consolidating Concrete
for Prestressed Members
Author(s):
Anton K. Schindler, Robert W. Barnes, James B. Roberts, and Sergio Rodriguez
Publication:
Materials Journal
Volume:
104
Issue:
1
Appears on pages(s):
53-61
Keywords:
modulus of elasticity; prestressed concrete; shrinkage; strength
DOI:
10.14359/18495
Date:
1/1/2007
Abstract:
Self-consolidating concrete (SCC) mixtures for use in prestressed concrete applications are evaluated in this paper. Twenty-one SCC mixtures were made under laboratory conditions with varying water-to-cementitious materials ratios, sand-to-total aggregate ratios, and cementitious material combinations (Type III cement, Class C fly ash, ground-granular blast-furnace slag, and silica fume). The SCC mixtures achieved prestress transfer compressive strengths between 5470 and 9530 psi (38 and 66 MPa). The moduli of elasticity of the SCC mixtures were in reasonable agreement with the elastic stiffness assumed during the design of conventional slump concrete structures. The long-term drying shrinkage strain for all the SCC mixtures were approximately the same or less than those measured for the control mixtures. A change in sand-to-total aggregate ratio had no significant effect on the long-term drying shrinkage. At later ages of 56 and 112 days, the measured drying shrinkage corresponded reasonably well to those predicted by the ACI 209 procedure.