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Concrete Water Cooling Systems (Part 2)
Concrete Water Cooling Systems (Part 2)
Cooling Units;
It is a water cooling system that can reduce water temperature to 8 ºC. This system can be preferred in regions where the temperature is up to 30 ºC in medium climate regions. It is the most frequently used water cooling system among water cooling systems in terms of low cost and ease of use.
Ice Machines;
There are ice machines that can produce in different ways. In manual type ice machines, the ice produced is added to the water tank in the concrete plant and the water is cooled. These types of machines can be preferred due to their high labor force and low cost. In automatic type ice machines, the ice produced is transferred directly to the concrete mixer and mixed with other materials to cool the concrete. Although it is an effective and professional cooling system, it is the highest system in terms of cost.
Ice Water System;
It is a new generation state-of-the-art cooling system. It can reduce the water to be used in concrete to 0.5 ºC. It is suitable for use in climates where the air temperature reaches up to 50 ºC. It works fully automatically and full-time. It is connected to the water tank in the concrete plant and cools the water there. With its average cost, ease of use and high performance, it is used in many concrete plants of great importance today.
Precautions to be taken in concrete casting;
Concrete temperature should be constantly controlled. Excessive vibration should not be done. Casting should be done in the shortest time and at the lowest temperature level possible during the day. The casting process should be completed immediately when there is no sweating water on the surface.
What is the setting time?
The time from the moment cement combines with water to the moment the cement paste hardens and loses its plasticity is called "setting time". This is a construction term. Concrete and mortar begin to harden, accordingly; the setting time of fresh concrete is longer in cold weather conditions and the speed of gaining strength is slower than the setting time of concrete in normal temperature conditions.
In normal portland cement, the setting time should not start before 1 hour and should be completed before 10 hours.