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Convect-Air®

Convect-Air®

Reduced curing duration via warm air circulation

Accelerates the curing process through controlled heating of the circulated curing chamber air. The system was specially developed for use at high temperatures. It is particularly suited to precast concrete products with a high water-cement ration that require little moisture.

Functions

Convect-Air®

  • Function 1

    Convect-Air®

    A 93% efficient air heating unit featuring a galvanized or stainless steel heat exchanger and modulating or single output burner for accurate temperature control.

  • Function 2

    Convect-Air®

    The insulated and galvanized heating unit is designed for simple connection to electrical power for the air ventilator(s), fuel source and exhaust flue for combustion.

  • Function 3

    Convect-Air®

    The insulated external air supply and return ducts are at the opposite sides of the curing area assuring even air flow and heat distribution. The number of distribution ducts across the length of the chamber and the number of nozzles per duct varies according to the pressure, temperature, and pallet locations in the enclosure.

  • Function 4

    Convect-Air®

    Vertical air supply ducts inside the curing chamber provide for consistent temperature and low air speed. The location and direction of the air supply outlets prevent accelerated evaporation of moisture from the concrete surface. This reduces the formation of shrinkage cracks.

  • Function 5

    Convect-Air®

    A thermostat is located in the distribution manifold. Once the desired curing temperature is reached, the heater switches off. It turns on again to maintain temperature when fresh concrete products are introduced. The circulation ventilator operates continuously throughout operation to maintain even temperature.

  • Function 6

    Convect-Air®

    A simple two-point control system provides for automatic unsupervised temperature measurement and system control.

  • Function 7

    Convect-Air®

    Custom-designed exhaust ventilator with manual gravity or electrically actuated damper for the reduction of humidity in the curing chamber (not depicted).

Videos

Convect-Air®

video

Kraft Convect-Air® Video

Check out the plants where Convect-Air® is used and what products are cured with it.

Benefit

Convect-Air®

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heating of air circulated through the curing chamber is efficient, minimalizes heat losses and heating costs

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efficiency equal to 93%

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ideal for precast concrete with a high wc-ratio

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temperature of 40 °C to 60 °C with a consistency of +/- 3 °C

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consistently high early strength, reducing broken edges and corners

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extremely short hardening time equal to between 8-10 hours

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effective, efficient and simple to operate and maintain

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an effective drying system after vapor or steam curing

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available with diesel, natural or propane gas burner and also utilizing a hot water or steam heat exchanger

Supplementary Products for Convect-Air®

Kraft Curing

Insulated Curing Chambers

Suitable for all curing systems, insulated chambers reduce energy costs by 50% and prevent condensation.

Concrete Curing Tents

A quick, simple and reliable solution for covering precast concrete products during curing; either inside or outdoors.

Hot Rocks®

Fully automatic system thaws and heats frozen aggregates for winter operation.

AutoCure®

Measures and controls the curing temperature and relative humidity for a fully-automated and repeatable curing process.

Projects

Convect-Air®

Documents

Convect-Air®

Convect-Air® Brochure

Convect-Air® Brochure | Accelerated Precast Concrete Curing System

Convect-Air® Flyer

Convect-Air® Flyer | Accelerated Precast Concrete Curing System

Contact

Convect-Air®

Sascha Kansyt

Mark Kraft

North America, South America, Australia, New Zealand, South-East Asia

+1-214-4007671

+1-215-3102130

markkraft@kraftcuring.com

Sönke Tunn

Sönke Tunn

Germany, Austria and Switzerland

+49-176-4321-5881

hello@tunn.eu

Daniel Rafter

Daniel Rafter

India, Middle East, Sub-Saharan Africa

+49 151 550499781

danielrafter@kraftcuring.com