How to manage concreting in hot weather?

Environmental factors, especially hot weather conditions, affect the properties of concrete and the construction operations of mixing, transporting and handling concrete materials. بBy understanding how these factors of heat, humidity, and even wind affect concrete curing, manufacturers can adjust mix designs and compensate in various other ways to maintain high quality standards and prevent end product problems. In this article, we will discuss how to manage concreting in hot weather. To buy and know the price of super lubricant, tile adhesive, anti-acid mortar, rebar planting adhesive, concrete restorer, epoxy and antifreeze grout, etc., you can contact Shimi Abadgaran Company. Call.

What is concreting in hot weather?

The ACI defines hot air concreting as: “one or a combination of the following conditions which, by increasing the rate of moisture loss and the rate of hydration of the cement, deteriorate the quality of freshly mixed or hardened concrete, or otherwise “The face leads to harmful results: high ambient temperature; high concrete temperature; low relative humidity; and high wind speed.”

The calendar doesn’t always determine when it’s “hot weather”—weather conditions with high winds, low relative humidity, and solar radiation can occur at any time, especially in warmer climates. Not only that, failure to manage these conditions can make your expenses challenging and expensive. Read on for five ways hot weather can affect your bottom line and what you can do to stay profitable.

Problem: increasing water demand

Impact on your bottom line: Additional water costs, both in supply and transportation

Solution: Fly ash, slag cement, and calcined clay all react more slowly than Portland cement and generate less heat. This means they are less prone to rapid seizure, and are also less affected by high temperature exposure. CarbonCure injects carbon dioxide (_{CO 2} ) while the concrete is being freshly mixed. After injection, the _{CO 2} is chemically converted into a mineral that permanently removes the CO 2 and actually increases the strength of _the concrete. This allows concrete producers to safely reduce the cement content in concrete mix designs, in turn reducing the risk of using more water for a higher cement mix.

Problem: Increasing drop

Impact on your bottom line: Additional water costs, both in supply and transportation

Solution: Engineers sometimes set the water-to-cement ratio (w/cm) lower or higher than necessary to achieve strength because they are trying to influence other properties such as durability or cracking. Mixing stone, sand, and cement creates voids that must be filled with water. Additional water is necessary to separate the particles or the concrete will be unworkable. When temperatures rise, water can evaporate more quickly – leading to changes in movement and addition of water. To reduce the amount of cement, you must first reduce the amount of water. Throw in more SCMs and CarbonCure – a stacked technology that allows cement reduction while maintaining strength and performance and you can send that water truck out.

Problem: Setup time is accelerated

Impact on your profit: Difficulty in placing and finishing so you spend more time on your job with a poor quality end product.

The solution: This is where compositional design comes in – before you go to work. Some fly ashes have a high proportion of aluminates. There is enough gypsum in the cement to control the aluminates in the cement, but excess aluminates from the fly ash can upset the balance between them. If you have a choice about it, blended cements already have the right amount of gypsum for the Portland cement and fly ash combination. Fly ash can also reduce the heat of hydration, which can be beneficial at warmer temperatures but can be sensitive to the firing temperature. It is important to ensure that the fly ash content is correctly calculated before pouring.

Problem: Evaporation on the surface of your placed concrete

Impact on your bottom line: Shrinking and breaking makes customers unhappy and that’s not what your business needs.

Solution: Planning ahead is your best bet. Your designer can play a key role here. By reducing the heat of hydration by incorporating more SCMs, the risk of cracking is reduced. Although it may seem counterintuitive, don’t reduce your water content to too low a weight per centimeter – rapid evaporation and high temperatures make this move dangerous. Instead, try to pour during the cooler hours of the day and avoid thermal shock when removing the forms.

Problem: Air content is affected by hot air

Impact on Your Profit: Improperly managed air content can negatively impact efficiency and set-up time

Solution: As the temperature rises, so do your dosages of aerating, reducing and retarding additives. The key is to make sure you know how the dosage performs in the heat, so test your mix beforehand at high temperatures. Don’t wait until you get to work to set performance times and deadlines. All should increase in warm weather. Another advantage of advanced testing is that it gives you an idea of ​​performance. Remember that concrete cured at high temperature in the early stages loses its strength in later stages.

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