Title:
Thermal Acceleration of Portland Cement Concretes Using Direct Electronic Curing
Author(s):
Ian Heritage, Fouad M. Khalaf, and John G. Wilson
Publication:
Materials Journal
Volume:
97
Issue:
1
Appears on pages(s):
37-40
Keywords:
accelerated curing; compressive strength; concretes; electric curing.
DOI:
10.14359/803
Date:
1/1/2000
Abstract:
Accelerated curing of concrete with electricity is frequently used in the precast concrete industry. It is vital that the consequences of using different direct electrical curing regimes on both short- and long-term compressive strengths are comprehended. In the present investigation, various heating regimes involving differing maximum temperatures and delay periods were used, and demonstrated a range of compressive strengths. The results showed that the maximum temperature, the delay period before heating commences, and the water-cement ratio (w/c) govern the early strength gain that can be achieved by the use of direct electric curing. It was also noticed that the electrical resistance of the electrically cured concrete immediately prior to testing could be used to predict compressive strength at various ages.