Thermal acceleration of Portland cement concretes using direct electronic curing

Accelerated curing of concrete with electricity is frequently used in the p recast concrete industry. It is vital that the consequences of using differ ent direct electrical curing regimes on both short- and long-term compressi ve strengths are comprehended. In the present investigation, various heatin g regimes involving differing maximum temperatures and delay periods were u sed, and demonstrated a range of compressive strengths. The results showed that the maximum temperature, the delay period before heating commences, an d 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.