Title:
Effect of Temperature on the Early-age Properties of Type I, Type II, and Type III/fly ash concretes with temperature
Author(s):
N. J. Gardner
Publication:
Materials Journal
Volume:
87
Issue:
1
Appears on pages(s):
68-78
Keywords:
age-strength relationship; compressive strength; concretes; curing; fly ash; low temperature; mechanical properties; tensile strength; Materials Research
DOI:
10.14359/2381
Date:
1/1/1990
Abstract:
A large-scale experimental investigation was undertaken using ready-mixed concretes to determine early-age strength development and the relationships between the mechanical properties when cured in water at different temperatures. Six different concrete mixes were used, namely, Type I, Type III, and Type I with 25 percent replacement with fly ash, at water-cement ratios (w/c) of 0.55 and 0.35. Curing was carried out in water at temperatures of 0, 10, 20, and 30 C, and measurements were taken at 1, 3, 7, 14, 28, 56, and 112 days. The rate of strength development is affected by w/c in addition to cement type and temperature. For all six mixes, the early-age rate of strength development was retarded for the 0 C curing temperature. Excluding the first 3 days, curing temperature had little effect on strength development of Type III cement concretes or 0.35 w/c Type I cement concretes. The strength development of 0.55 w/c Type I cement concretes and Type I/fly ash concretes cured at 0 C was some 10 MPa less than similar concretes cured at 20 C. The derived relationships between cylinder strength and split cylinder tensile strength and dynamic modulus appear to be unchanged by cement type or curing temperature.