concreting in Winer GBC Concrete Forming

Concreting in Winter

The most difficult time of the year for concreting is winter, because at low temperatures the hardening process of concrete slows down and there is a danger of freezing of the concrete mix. Freezing in turn leads to a dangerous decrease in structural strength.

Preparation for winter concreting includes planning and comparing alternative options for all participants in the concreting process: in addition to facility managers and construction crews, suppliers of materials and equipment should also take part in the planning. Coordination and careful preparation require the following questions:

The fastest concrete pouring into the formwork, without unreasonable delays;
The fastest possible creation of thermal protection of the structure: during concreting or at the end of pouring;
Thermal insulation of the formwork of pillars and walls, and the use of hot concrete;
To guarantee a set of strength of the lower parts of vertical structures, the use of additional heating;
Creating thermal protection for the upper parts of vertical structures;
To guarantee a set of strength, heating supports, edges and areas of occurrence of cold bridges of horizontal structures by heating;
and Avoid the use of hardening concrete additives;
Avoid concreting at low temperatures, due to the slow hardening of concrete in case it is impossible to use additional heating to accelerate hardening;
Avoid the use of hot concrete when pouring massive structures, since the temperature is more than 50 ° C in a hardened structure reduces its final strength.
Possible alternative solutions:

increase in concrete strength class;
use of quick hardening concrete;
use of hot concrete;
the use of well-insulated formwork of pillars and walls;
the use of formwork with thermal insulation in horizontal structures;
infrared heating (heating by heat rays);
electrode heating.

Call For Estimate