Abstract
The article is devoted to the problems of improving efficiency and cost reduction of fine-grain concrete at production of small wall products by complex use of fabricated raw materials in the form of TPP bottom-ash mixtures. The results of bottom-ash mixtures research and composite gypsum binders (CGB) for fine-grain concrete based on such mixtures are provided in the paper. Microstructure and morphology of fine mineral additives of slag and fly ash and prospects of using these components as filler in CGB composition are researched. The properties of fine-grain concrete and concrete mixtures on this CGB are researched: workability, porosity, density, strength, and deformation properties. Experimentally proven is the effectiveness of integrated use of local raw materials, including fabricated materials, in the production of CGB and fine-grain concrete based on it.
Highlights
The fastest growing rates of construction in some regions of the country, including Chechnya, claim for a significant increase in production of high quality construction composite materials, which manufacturing and processing requires less possible amount of energy and investment
Studies of bottom-ash mixtures (BAM) properties (Table 1) added to gypsum cement compositions for controlling hardening process and helping changing the final properties of the materials showed that their hydraulic activity is the most important property determining the possibility of their use in binders and concretes based on them
composite gypsum binders (CGB) based on TPP bottom ash waste is promising for producing small piece wall materials in terms of environmental friendliness, ease of delivery, convenience in use due to small setting time, etc
Summary
The fastest growing rates of construction in some regions of the country, including Chechnya, claim for a significant increase in production of high quality construction composite materials, which manufacturing and processing requires less possible amount of energy and investment. The necessity to develop and implement effective production, including the so-called "green composites", is claimed by the modern requirements and resource and energy saving in construction and energy efficiency of building production. One of such materials that meet the requirements of resource and energy saving at their production, of heat protection and environmental safety are gypsum binders and products based on them, as the most efficient in terms of energy intensity of production and the negative impact on the environment. In Chechen Republic, having large reserves of natural raw materials for production of cement, gypsum binders, fine and coarse aggregate concrete and fabricated raw materials in the form of multi-tonnage bottom-ash mixtures (BAM), concrete scrap and other wastes of building demolition, production of high quality building materials with complex use of local raw materials, can make a significant contribution to the further formation of the construction industry and ensure environment protection (Alaskhanov, 2013)
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