# How do you calculate the evaporation rate of concrete?

## How do you calculate the evaporation rate of concrete?

The arrows demon- strate an example for a day where the ambient air temperature is 80 °F (27 °C), the relative humidity is 50%, the concrete temperature is 87 °F (31 °C), and the wind velocity is 12 mph (19 km/h). The resulting rate of evaporation is about 0.25 lb/ft2/h (1.2 kg/m2/h).

What is surface evaporation?

Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase. The surrounding gas must not be saturated with the evaporating substance. When the molecules of the liquid collide, they transfer energy to each other based on how they collide with each other.

What is concrete evaporation retarder?

An evaporation retarder is a spray of film that is applied to the wet concrete surface shortly after placement. The idea here is for the film to help hold moisture into the surface so elements like wind and sun will not dry out your future work of art.

### How much water evaporates out of concrete?

The evaporation rate is greater than 0.50 kg/m²/hr. We recommend the following mitigation measures to help achieve a good quality concrete pour.

What is evaporation rate?

The evaporation rate is the ratio of the time required to evaporate a test solvent to the time required to evaporate the reference solvent under identical conditions. The results can be expressed either as the percentage evaporated within certain time frame, the time to evaporate a specified amount, or a relative rate.

How is evaporation calculated?

This reflects the volume of liquid that has evaporated. For example, 500 mL – 495 mL = 5 mL. Divide the volume of liquid that evaporated by the amount of time it took to evaporate. In this case, 5 mL evaporated in an hour: 5 mL/hour.

## What is evaporation in short form?

evaporation, process by which an element or compound transitions from its liquid state to its gaseous state below the temperature at which it boils; in particular, the process by which liquid water enters the atmosphere as water vapour in the water cycle.

What is evaporation explain with example?

Evaporation definition Evaporation is defined as the process of a liquid changing into a gas. An example of evaporation is water turning into steam.

What is a concrete finishing aid?

Tam Tech Finishing Aid is a spray applied product designed to provide more time to finish concrete flatwork in hot, dry or windy conditions. It helps contractors produce high quality concrete flatwork and avoid concrete setting before they can complete the finishing operations.

### How do you use an evaporation retarder?

Evaporation retarders are best applied directly to the bleed water, or when bleed water would normally be present. In severe conditions, Spray Film may be reapplied.

Does all water evaporate from concrete?

Even after the concrete is cured, excess water still must evaporate from the concrete. While it only takes around 28 days to cure concrete, drying can take months. The general rule of thumb is that concrete takes about 30 days to dry for every one inch of slab thickness.

Does the water evaporate out of concrete?

As the concrete begins to set, some of that water (about half) combines with the portland cement (through hydration) and some rises to the surface as bleed water where it evaporates. The rest is in the pores of the concrete. Concrete doesn’t begin to dry until after finishing and curing.

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