Results of researches on an assessment of suitability of atyukhtinsky clay raw material for production of a ceramic brick by way of semidry pressing is shown. It is defined that for receiving the ceramic crock, to GOST meeting requirements, it is necessary to enter into the mass of the mineral calcium additive. Produced a pilot batch of the facial frost-resistant ceramic bricks on Shakhtinskiy factory.
Keywords: ceramic brick, semidry pressing, mineral additive, frost resistance, pilot-industrial testing
This article provides an analysis of the effect of different chemical nature foam on setting time caustic magnesite, as well as qualitative and quantitative composition in samples of tumors after 28 days of hydration. Shown that an integrated foam Penostrom has significant slowing effect on the hydration of magnesia binders, which may adversely affect the quality of the resulting foam concrete.
Keywords: Caustic magnesite, foamer, setting time, the quantitative and qualitative composition of the tumors, slow the hydration of caustic magnesite
The quality of construction and installation works and applied materials, products and structures when erecting tall buildings are crucial in ensuring the reliability and durability of constructions and building comprehensive security as a whole. Buying a home and other structures in our country sometimes resembles a lottery: quality, regardless of the value of the object is not guaranteed. Moreover, the fact of putting the new State does not guarantee the quality of this object. Quality can be guaranteed only through incoming control processes at each stage of construction. Total quality control techniques can help in measuring, describing, analyzing, interpreting and modeling volatility of indicators of the quality of products, even with relatively limited amounts of data.
Keywords: quality control, strength, concrete, non-destructive method, analysis, durability
The main influence factors on the long-term cracking resistance of asphaltic concrete pavement reviewed in the article. There is offered the indicator of long-term cracking resistance and calculating experimental method of minimum quantity defining of cycles of asphaltic concrete stressing till crack formation in compliance with climatic conditions and traffic load. The results of the comparative analysis of long-term cracking resistance of different asphalt concrete are advised.
Keywords: weather-climatic factors, dynamic influence, indicator of long-term cracking resistance, estimation long-term cracking resistance of different asphalt concrete
The paper is devoted to the generalized analysis of the research on the influence of the electric field and organic gelling additives on the properties of foam concrete. It is shown that the transmission of the electric field close to the resonance frequency oscillations of the particles in the binder or the introduction of slip mass gelling components lead to a significant increase in the physical and mechanical characteristics of the foam.
Keywords: foam, impact properties, field modifiers.
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Processes associated with obtaining various purposes silicate materials is always accompanied by energy exchange between the interacting phases. Their thermodynamic analysis is not always possible due to the lack of appropriate reference material.
This paper proposes a priori estimate of the thermodynamic functions of silicate formation, as well as other oxide minerals, and their crystalline hydrates.
Keywords: silicates, thermodynamics, functions, education, specific heat.
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Carried out a comprehensive analysis of the factors governing the strength and resilience foams, for the manufacture of foam concrete mixes. Found that lowering the temperature of mixing water helps to improve the structural properties of the foams.
Keywords: surfactants, foam, lyotropic liquid crystals.
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Statement of the problem. Preparation of high-strength foam concrete in construction allows for energy and resource conservation. Water covers more than 50% of their dense component and on its properties depend strongly on structural properties of foam concrete, is not fully explored.
Results. The effect of mixing water of low temperature on the structure and properties of constructive penofibrobetonov. Recommendations on the account in the calculation of reinforced concrete elements elevated structural properties and deformation diagrams penofibrobetonov by mixing water setback.
Conclusions. Using low temperature mixing water improves the structure, increases the strength, deformability and elastic modulus, as well as changes of the deformation diagram fibropenobetonov.
Keywords: fibropenobetona, foam, water temperature mixing, macroporosity, economic efficiency, technical and economic assessment.
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The results of studies of the effect of complex polyfunctional additives consisting of superplasticizer stabilizer and redispersible powder on strength and shrinkage of cement paste.
Multiplicative model is developed, with which is possible to regulate the formation and development of deformation strength compositions for various compositions of dry building mixes. Dependencies describing the influence of the complex polymer additives on the formation and development of the deformation strength of cement stone. The functions of the coefficient values depending on the dosage used additives.
Keywords: dry mortar, cement stone, additives, modifiers, superplasticizer additive stabilizing effect, redispersible polymer powders, strength, shrinkage deformation.
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Formulation of the problem. One of the major technological challenges is to get fiber-reinforced concrete with a uniform (aggregated) distribution of the fibers in terms of concrete, on which depend significantly on design and performance of the fiber-reinforced concrete. Results. Proposed shuttle technology making fiber-reinforced concrete with aggregate distribution of the fibers, studied the change of its structural properties, developed design recommendations for the evaluation of its strength and deformation characteristics and strain diagram in compression and tension. Conclusions. Experimental studies suggest a positive effect of the proposed technology on the properties and characteristics of fiber-reinforced concrete with aggregate distribution of the fibers. Keywords: fiber concrete with aggregate distribution of the fibers, the strength and deformation characteristics, the strain diagram.
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The basic structure-forming processes during compaction. Experimentally demonstrated the possibility of enduring face bricks of cement-based composition of chalk soft chalk. Keywords: ctrukturoobrazovanie, brick, soft chalk, construction materials production.
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