Wind ash is a material that is produced from burning coal and is collected by dust in special dust filters. About 85 percent of the particles come from silicon, aluminum, iron, calcium and magnesium oxides. The desirable effects of this material on the improvement of the properties of fresh and hardened concrete have been increasing in the world.
The use of this material increases the efficiency of fresh concrete. Also, the initial temperature increase of concrete decreases significantly. Therefore, its use in bulk concrete is common. The performance of this material has also been proven to enhance the durability of concrete against aggressive environments. Lower permeability, proper performance against carbonation phenomena, sulfate and chloride resistance, and alkaline reaction control of aggregates are the advantages of using this material rather than cement. Although all the advantages mentioned are affected by the proper choice of water to cement ratio, the proper treatment, the desired quality of the ash and appropriate amount of substitute for cement instead of cement. If the specification of this material conforms to the requirements of the standard, the replacement value of 20 to 50% is a good choice, although in some cases replacement is applied with further amounts.
In our country, due to the presence of coal mines, there is a good potential for the production of this material and will be used in the near future.
Today, the use of a variety of mixed cements and cement substitutes is somewhat clear in improving the properties of concrete durability, with a number of studies and studies that have been carried out globally and in accredited academic, research and academic centers.
Types of concrete additives, super lubricants and concrete lubricants available by the technical and specialized concrete clinic of Iran
Concrete lubricants of technical and specialized concrete clinics of Iran can be produced and supplied in different classes:
The concrete lubricant is suitable for use in concrete pumps that has concrete properties and is supplied as a liquid and provides excellent lubricating properties to concrete. Concrete lubricants The specialized and specialized concrete clinic of Iran facilitates the operation of concrete pumps. This concrete lubricant, in addition to being used in the Concrete Pump, has other applications, such as the preparation of concrete, especially for long distances. Concrete mixing is recommended in hot weather.
Pumped Concrete and Facilitate Concrete Pump: The use of this super-lubricant for concrete increases the maneuverability of concrete pump. Also, for the easy pumping of concrete, an ultrasonic lubricant can be used by the company specialized in the technical and specialized clinic of Iran, which causes the deposition of the concrete pump down. The use of concrete lubricants is appropriate at the time of bulk concreting, which should be integrated seamlessly.