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To develop heat resistant aerated concrete and its production technologies

Qualitatively new production techniques for heat resistant aerated concretewill be developed. For this purpose, human-caused waste from industrial enterprises will be used. This is currently removed to dumping grounds and pollutes the environment.

In the industry, a lot of technological waste from production accumulates, is not used anywhere and pollutes the environment. Thus, due to the production of mineral wool at the private company UAB PAROC, soft wool waste is accumulating in LITHUANIA, as in UKRAINE where human-caused waste is being created by the metallurgical industry. The Project will help solve two problems which are currently urgent among industrial enterprises, namely: - to utilize the production waste of industry; - not to pollute the environment with production waste. The scientific research performed in both countries shows that dispersive and fibrous additives may be produced out of human-caused waste from industrial enterprises after its respective processing, and these additives may be used for producing building composites and heat resistant aerated concretes. Following the Project, we will develop brand new production techniques for heat resistant aerated concrete and these techniques will enable us to produce heat resistant products out of aerated concrete. The autoclaved aerated concrete (AAC) products - slabs - can serve at an operation temperature of 650 degrees Celsius, and the products of non autoclaved aerated concrete - shells - will be used for insulation of pipes up to 650 degrees Celsius. Heat resistant materials are currently used for insulation of heat equipment and their demand in this period of total urbanisation is ever increasing. Presently for insulation of heat equipment, the heat resistant products of mineral wool or concretes are used. The production of these materials requires big power inputs, therefore, the heat resistant products are a high cost. One of the applications of heat resistant aerated concretes is the construction of stovepipes-chimneys used in heating systems for individual residential houses. While considering the available stovepipe constructions, we can see that the base of the stovepipe is made out of heat resistant steel pipes or out of ceramic chimney elements produced by casting. It is required that chimney inserts be operable at a service temperature of up to 600 degrees Celsius (C). Therefore, the inserts are insulated by a layer of mineral wool resistant to a temperature of 700 degrees C. On the outside, the chimney is insulated by a shell made out of haydite or other material without any greater standards as to resistance to high temperatures. One of the goals of the Project is application of heat resistant concrete, which does not disintegrate at a temperature of 650 degrees C in the chimney constructions of exterior layers, with simultaneous rejection of the mineral wool layer. The new heat resistant concrete would allow for building chimneys inside the buildings and receiving the additional effect of heating. Heat resistant concrete accumulates heat and then radiates it into the room by heating it and thus reduces service costs. In Central and Eastern Europe no chimneys of analogical construction are used. This may be explained by the fact that heat resistant materials should not only withstand high temperature, but also should be sufficiently strong. Meanwhile, most thermal insulating materials are of low density and low strength. The known heat resistant materials are produced out of natural rock of volcanic origin. In ICELAND such materials are sufficiently strong and withstand the temperature of 650 degrees C, however, due to their high price, they do not favour large application in chimney constructions. By their physical properties, the newly products developed from aerated concrete will be equivalent to products made out of natural stone, but much cheaper. The autoclaved aerated concrete is produced out of sand and limestone, and the resources of these raw materials are sufficient in LITHUANIA. Pursuant to the Project WASTEHEATCONCRETE, the following scientific-technical problems will be solved: - The investigation into the effect of dispersive and fibrous additives on properties of aerated concrete; - The development of production techniques for processing human-caused waste from industry, along with optimisation of waste crushing parameters; - The definition of the character of interconnections between complex components of concrete composites and their change at exposure to heat; - The achievement of homogeneity in the formation paste of aerated concrete, i.e. even distribution of fibrous and dispersive additives in the products; - The development of production techniques for heat resistant masonry mixtures and finishing plasters; - The investigation of service properties of the newly developed products.
Acronym: 
Wasteheatconcrete
Project ID: 
4 487
Start date: 
01-07-2008
Project Duration: 
42months
Project costs: 
700 000.00€
Technological Area: 
Recycling, Recovery
Market Area: 
Chemical and solid material recycling

Raising the productivity and competitiveness of European businesses through technology. Boosting national economies on the international market, and strengthening the basis for sustainable prosperity and employment.