Tips to Cure Concrete in Winter

In cold weather, if you want to cure roofing company germantown, you should have the required material and knowledge. Water, humidity, temperature and even snow are factors that can complicate cold weather concreting. You should never pour concrete on frozen ground and must be very cautious when temperatures fall below the freezing point. Concrete hydration can also be affected as soon as the temperature falls below the freezing point. Read on to know our tips to cure concrete in the cold season.

Required materials

You may need different materials based on the quantity of concrete that needs to be cured as well as the surfaces that need to be protected. Certain materials may produce or even increase heat. These materials include chemicals, windbreaks, insulating blankets, electric heated blankets, straw-plastic and insulating sheets.

Know the facts

When placing concrete in cold weather, there are two major factors you will want to concern yourself with before starting your project:

#1 – When it is cold, concrete sets more slowly – slow at 50°F, and when it’s below 40°F the hydration reaction will basically stop and the concrete curing process halts. Ideal temperature for curing concrete is about 80 degrees F.

#2 – Concrete may freeze before gaining enough strength which will break up the matrix of the concrete and weaken your overall finished product. You don’t want this.

There is a difference between concrete temperature and air temperature. When it’s cold outside, the concrete will need to be protected until it can handle the cold on its own. Rule of thumb #1 is that once the concrete has strengthened to 500 psi then it’s safe. The important thing that happens at this point is that at almost the same time that the concrete hits 500 psi compressive strength, there’s not enough water left in the pores to damage the concrete, or in other words, hydration of the cement has consumed enough water in the mix so that freezing won’t affect it much. With almost all concrete, this will happen during the second day, even at 50° F.

There are usually two things we can do in cold weather to help achieve the required number of 500 psi strength which will help you get the best results and the best finished product:

Leave a Reply

Your email address will not be published. Required fields are marked *