RESEARCH OF PHYSICAL-MECHANICAL PROPERTIES WITHOUT KILNS BUILDING MATERIALS
Abstract
Today, the priority direction of the development of the building materials industry in Ukraine is resource and energy conservation. By the combination of qualitative characteristics of construction products, as well as from its cost, the competitiveness of the construction industry depends directly.
The cost of building materials depends on what raw materials they are produced, how energy-consuming is the technology of their production and at what distance from the production of materials is the raw material base. Significantly lower the cost of building materials, in particular, and construction, in general, will allow the manufacture of building materials at the place of their consumption of local raw materials and using non-combustion technologies.
The development of non-combustible water-resistant building materials based on local clay raw materials is an urgent task that can be solved by introducing active mineral additives that promote the formation of water-resistant tumors.
Solving the problem of obtaining non-combustible building materials on the basis of local clay raw materials, as well as studying the physical and mechanical properties of such materials, has great scientific and practical significance.
In this work, the study of physical and mechanical properties of non-combustible building materials on the basis of local clay raw materials, which were obtained by the method of formation of pressure.
Loose deposits of brick raw materials "Kharkivske-2" were used for research. Modification of the studied building materials was carried out by introducing into their composition complex additives containing in their composition slag-materials – microsilica, basic slag and hydrated lime.
The evaluation of the physical and mechanical properties of water-resistant building materials was carried out on samples of an optimal composition with dimensions of 50 × 50 × 50 mm, closed in alkaline medium and limited contact conditions obtained by pressing under pressure of 20 MPa, followed by temperature-humidity treatment at 90-95°C for 8 hours (in mode 2+4+2). The indicators of water absorption, water resistance, compression strength and frost resistance were studied.
Non-combustible building materials on the basis of local clay raw materials with optimal content of limestone-silica modifier with acceptable operational parameters, which allows their use in low-rise building.
Keywords: clay, slag, lime, water resistance, frost resistance, water absorption, compressive strength.
References
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