Is it OK to pour concrete in hot weather?

If possible, avoid pouring concrete at noon or during peak times for hot air temperature. When pouring concrete in hot weather keep an evaporative retarder ready on site in case the temperature gets hotter and water is rapidly evaporating. Use ice as part of the concrete water mix to cool the concrete.

What temperature is too hot for concrete?

While most everyone enjoys the warm summer months, the temperature can make it difficult when pouring concrete in hot weather. Concrete cures best in a range between 70° to 80° F., but as your temperature approaches 90° F, you’ll start to run into problems.

Which cement should be used in hot weather concreting?

But it is highly recommended to use BLENDED CEMENTS like Portland Pozzolana Cement (PPC) / Portland Slag Cement (PSC) in such cases not only from hot weather concrete point of view but also from overall DURABILITY OF CONCRETE STRUCTURES.

How do you protect concrete in hot weather?

The concrete should be cured at the correct time with a suitable curing agent, which can be applied via a spayer. It is also advisable to cover the concrete over with plastic sheeting in order to shade the concrete from the harshest temperatures and lock in moisture.

What do you mean by hot weather concreting?

Hot Weather Concreting. Definition. While hot weather conditions are commonly encountered in summer, combinations of high temperatures, winds and low humidity could result in conditions leading to problems with concrete placement and finishing at any time.

What to do when concrete is poured in hot weather?

The precautions may include some or all of the following: Moisten subgrade, steel reinforcement, and form work prior to concrete placement. Erect temporary wind breaks to limit wind velocities and sunshades to reduce concrete surface temperatures. Cool aggregates and mixing water added to the concrete mixture to reduce its initial temperature.

What does ACI 305 hot weather concreting mean?

ACI 305 “Hot Weather Concreting” defines hot weathers as any combination of the following conditions that tends to impair the quality of the freshly mixed or hardened concrete:

Is it good practice to leave concrete forms in place?

It is good practice to leave forms in place as long as possible, because they help distribute heat more evenly and help prevent drying of the concrete. Live steam exhausted into an enclosure around the concrete is an excellent method of curing because it provides both heat and moisture.