Effects Of Cold Weather On Concrete Curing

If your concrete isn t protected with concrete curing blankets after it s poured it may cool too rapidly slowing the chemical reaction.

Effects of cold weather on concrete curing.

Freezing of concrete at early stage. Be prepared to handle more bleed water than is typical in regular concrete placement. Curing in cold weather will be different as in this case the biggest concern will be the maintaining of an adequate and conducive temperature for hydration. The permanent damage may occur when the concrete in fresh stage is exposed to.

Damaging effects of cold weather concreting. A delayed setting when the temperature is falling to about 5 0 c or below the development of strength of concrete is retarded compared with development at normal temperature. Concrete placed during cold weather will develop sufficient strength and durability to satisfy the intended service requirements when it is properly produced placed and protected. For well proportioned concrete mixtures this is typically within 48 hours of placement when the concrete temperature is maintained at 50 f.

If the temperature is too cold the concrete may not have reached a minimum strength of 500 psi soon enough to resist the effects of freezing temperatures. Except in heated protective enclosures little or no external supply of moisture is required for curing during cold weather. Poor finishing techniques can also doom your slabs. When the temperature is falling to about 5 0 c or below the development of strength of concrete is.

Depending on the actual ambient temperature protection of a concrete placement may require the use of windbreaks enclosures or supplementary heat. Stresses due to. Effects of cold weather on concrete delayed setting. Concrete can resist the effects of one freeze thaw cycle as long as it is properly air entrained not exposed to an external water source and has reached a compressive strength of 500 psi.

Following deleterious effect may occur due to cold weather concreting hydration will be hampered. In the absence of special precautions the effect of cold weather concreting may be as follows. The exposure of concrete to cold weather will extend the time required for it to reach initial set which may require finishing crews to be available for a longer period.