COLD WEATHERCONCRETING

Abstract

Weather conditions can have a dramatic effect on both the setting time and concrete placing, finishing and
protection systems that must be followed for proper concrete placement. Because the hydration process is a chemical
reaction it is strongly affected by ambient air and subgrade/formwork temperatures. At low temperatures concrete gains
strength and sets very slowly and must be adequately protected from freezing and thawing. Concrete that is allowed to
freeze while in its plastic state can have its potential strength reduced by more than 50% and its durability properties
will be dramatically reduced. Hence necessary precautions/arrangements should be taken so that concreting work can be
carried out in cold temperatures without compromising with the strength of concrete. This Study explains various aspects
of cold weather concreting.