Temperature and humidity levels are determining factors when it comes to the strength of a concrete installation. If not done properly, a Concrete Pouring will not have the required durability you want.
A poorly done concrete pouring results in a cracked surface. If you’ve ever noticed these problems, it’s a good indicator that the installer didn’t take required precautions while pouring concrete.
Moreover, the air temperature is not the only deciding factor in determining the best time for concrete pouring. The wind speed, humidity, and the temperature of the surface where you apply concrete all play a significant role.
Generally, experts recommend undertaking concrete pouring work when the temperatures are moderate. Any extremes can make the work even messier and difficult. So, if the outside weather is extremely hot or freezing, forget about pouring concrete for a while.
Additionally, the temperature and water content of the mixed mixture is also important.
While weather and humidity levels are beyond control, experienced installers usually take certain precautions to maintain the quality of work.
Let’s check out these Concrete Floor Pour Tips and Techniques and find out the best time of the year for concrete work.
Concrete Pouring Tips for Hot Weather
When it comes to pouring concrete, hot weather is generally defined as temperature above 90 degrees Fahrenheit with low humidity. Here, the problem isn’t really the air temperature but the concrete’s temperature. In steaming weather, the top concrete layer generally sets faster than the bottom layer. This happens due to the extremely fast evaporation process that doesn’t allow the concrete to hydrate properly. This can result in the following problems:
- Shrinkage of the hardened concrete while the bottom portion stays still.
- Low strength and durability.
- Cold joints due to decrease in the concrete setting time.
Taking the following steps can help in managing the concrete application in scorching heat:
- Avoid concrete work in the noon when temperature is at peak.
- Plan control joints (also known as planned cracks) at smaller intervals than cold weather concrete joints.
- Use shades to prevent harsh climatic impact.
- Use cold water to mix the concrete and use a sprinkler to keep the slab moist. Ice is also useful in water mix to keep the concrete cool.
- Use wet coverings to prevent drying effect.
- Once you add water to the concrete mix, mixing time should be quick.
- All the equipment used to pour concrete should be kept in shade before use.
- Dampen the sub-grade layer when pouring concrete for a slab.
- Keep the concrete mix bags under shade until the last moment of their use.
- Implement the correct Concrete Curing Methods to ensure correct setting of the concrete.
So, as you can see, it’s not entirely impossible to undertake concrete application in hot weather. Concrete installers generally take the above steps to make sure that you get a polished concrete finish without cracks.
Now, let’s see what can be done about pouring concrete in cold weather.
Concrete Pouring Tips for Cold Weather
Concrete is exposed to cold weather if it meets the following conditions:
- Temperature in not more than 50o F for more than half of the day.
- Average daily temperature is less than 40o
When the climate is freezing, there is a risk of concrete surface developing cracks. The reason behind this is quick surface cooling time while the inside temperature remains high due to hydration.
So, in cold weather, it’s important to protect concrete from freezing shortly after pouring it. If the installer doesn’t take proper steps, water in concrete may turn into ice and expand further to cause cracks.
To prevent this from happening, Concrete Contractors take the following precautions:
- Never pour concrete over frozen ground or snow. Use a heater to thaw ice on the ground before pouring concrete.
- Use hot water and fast drying chemicals in the concrete mix.
- Allow the concrete to set before nighttime comes when the temperature will drop further.
- Concrete should have the right amount of Air Entrained Voids (controlled amounts of air in the form of bubbles). This can help in preventing the freezing effects.
- Avoid finishing tools that can reduce the air entrained voids in the surface.
- Use heated enclosures for 3-7 days to maintain the temperature above 50o
- Enclosure used for concrete application should be windproof.
- Maintain the concrete temperature above 40o F for 4 more days after the use of heated enclosure.
- Concrete mix should have minimum water to cement ratio to decrease setting time.
- Keep concrete over 5o Celsius for at least first 48-hours to let the concrete develop the required strength.
Well, these are some of the important recommendations for maintaining the optimum concrete finish in hot and cold weather. Now, let’s see the conditions to maintain the strength of the concrete surface.
Important Factors for Best Concrete Pouring
The durability of a concrete work largely depends on maintaining the optimum hydration of the concrete mix. This further depends on preventing exposure to extreme temperatures. Concrete drying time also plays a part in the ultimate strength of the concrete pour.
Let’s see the factors that can significantly impact the finish of a concrete floor work.
- Protect concrete mix from wind and direct sunlight to prevent rapid temperature variations. Wet coverings are often used to protect the concrete from extremities.
- Concrete mix should retain water for a minimum of 7 days at 23o
- Pay special attention to the enclosure used for concrete application. This will help in maintaining a temperature conducive for concrete hydration and drying time.
Now, pouring concrete is not a work of an amateur. It requires specialized tools and experienced personnel to ensure the highest quality of work.
Furthermore, concrete contractors have specific knowledge about the best time for concrete pouring.
Are you looking for a concrete pouring specialist in Toronto?
Hire the Best Concrete Specialist: Maple Concrete Pumping!
Maple Concrete Pumping has over 8 years of experience in concrete projects across Toronto. We have the required machinery and tools to provide you the best concrete services. Moreover, we deliver our services through a team of certified and skilled operators and staff.
Our professional team has in-depth industry knowledge to deliver quality irrespective of the weather conditions. Moreover, we focus on constantly upgrading our methods as the technology improves.
Our Certified Concrete Pump Operators are trained in electricals and hydraulics troubleshooting. So, project losses are greatly minimized when you work with us.
Besides concrete pouring, our extensive range of services include:
- Concrete pumping with the use of latest Concrete Pumps equipment and a trained team of operators. We also own and operate concrete pumping equipments including line pumps, City pumps, and trailer pumps.
- A wide variety of equipments for Foam Concrete Pouring.
- Pumping different types of concrete including foamed, fluid, grout, or fibre concrete.
- Concrete finishing services including design and formwork.
Further, we can help in sizing, safety, and pouring strategies for your project to minimize cost and time wastage.
Get in touch with our representatives today @ +1 (647) 529-7867 to get a free quote on concrete pouring.