Possibility of receiving lungs self compacting concrete is considered. The technique of a choice of components of a raw mix is offered and are brought physics - mechanical characteristics of a ready construction materia
Keywords: Self-compacting concrete, the supersoftener, knitting, filler.
The article considers the regulatory and estimated characteristics, as well as proposals for the estimate of the strength and deformability characteristics for possible practical inculcation of fiber concrete with aggregate distribution of fibers produced by the shuttle and conveyor technology, and reinforced concrete structures of them.
Keywords: regulatory, estimated characteristics, stress-strain diagram, compression, tension.
One of the most important technological aims is to obtain a fiber concrete with uniform (aggregate) distribution of the fibers by volume of concrete, from which depend essentially on the constructive and performance attributes of fiber concrete. Authors proposed pipeline technology of preparation of fiber concrete with aggregate distribution of the fibers, also they studied changes in its structural characteristics, and developed estimated recommendations for the evaluation of its strength and deformability characteristics and strain diagrams in compression and tension
Keywords: fiber concrete with aggregate distribution of fibers, strength and deformability characteristics, deformation diagrams
Advantages of being self-сщьзсештп concrete of the lowered density (LSUB) before heavy and light concrete are shined, characteristics of components ЛСУБа and influence of their quantitative contents are provided in a mix on properties of the fresh and hardened concrete. The optimum mode of warmly moist processing is offered.
Keywords: Self-compacting concrete, the supersoftener, knitting, filler, a volcanic tufa.
The main maintenance of a results of calculation of a thermointense condition of beams depending on various ways of an attachment to the basis - jammed in the basis, with absolutely hard sealing-off on end faces and absence of any communications at end faces is considered. The analysis shows, that the more age of "blocks-communications", the more they possess rigidity. It means, that they are less pliable, and sizes of pressure in the settlement block are close to pressure in the block with the jammed end faces.
Keywords: Termointense, concrete, block, communication, support, suppleness, pinched, temperature, movement
The technological process of aerocrete production consists of many operations during which the considerable amount of dust enters the atmosphere. The results of the dispersion analysis show that the great bulk of the formed dust is made by fine particles to 20 microns. The cyclones used in building industry don't remove the dust effectively. To improve the aerocrete production environmental safety an installation of dust collectors on the oncoming swirl flows is requested.
Keywords: Environmental safety, dust emission, purification efficiency, density composition, dust collectors installation
Calcating-experimental method shows that on the basis of cement and fine-grounded mineral powder, complex binding materials can be obtained, providing high strength of obtained stones.
Keywords: cement, mineral powder, components, optimization, strength
In the article are considered the results of the researches of noncorrodibility of the concrete received with the use of industrial wastes and mineral-chemical additives of various structures in various combinations. Research has shown increase of noncorrodibility, durability and water resistance of the concrete obtained with the use of additives, and the most effective, at that, is the sharing of mineral-chemical additives.
Keywords: concrete, mineral-chemical additives, industrial wastes, noncorrodibility, decstrin, lignosulfonat, kinetic, durability
Re-equipment of existing enterprises is comprehensive intensification of production, increase production capacity, production and improvement of its quality while ensuring productivity growth and job cuts to reduce material capacity and cost of production, saving of material and energy resources, improvement of other technical and economic performance of the company in General
Keywords: Modernization, технологическоя line, production, ceramic brick, operating enterprise
Belt conveyors are widely used in factories of building materials. They are used to transport bulk and General cargo on the short, medium and long расстояния.Установка the working body of the screw conveyor brushes allows to increase capacity of the conveyor by eliminating the accumulation of the material to be transported inside the gutter.
Keywords: Operating enterprise, belt and screw conveyors, building materials.
The composition, basic properties and application scope of the two main types of expanding binders historically most widespread in Russia such as gypsum-alumina expansive cement and expansive cement Type M are given. The expansion kinetics of the binders ranging from gypsum-alumina expansive cement to expansive cement Type M is observed. The role of lime as a supplement and as a hydration product of the Portland cement in the expansion process is shown: as a supplement in small values (2-4%) to gypsum-alumina expansive cement with higher gypsum concentration stabilizes the hardening and expansion process, in higher values boosts the expansion process to self-destruction. Optimization criteria of the expansion kinetics aimed at obtaining project expansion in 10 days of hardening without any additional chemical additives are proposed.
Keywords: gypsum-alumina expansive cement, expansive cement type M, expansion kinetics, lime
Analysis of the effectiveness of the electrophysical activation of foam concrete mixtures was completed. The raw materials and experimental technique are described. Results of estimation of the effectiveness and impact of alternating electric field on the foam concrete mixes was presented. As object of research was made the impact of factors such as the grading of the aggregate and the tension created by the electric field on the physico-mechanical properties of foam concrete made of electroactivated mixtures. Conclusions are made on the basis of the obtained experimental dependencies.
Keywords: Variable electric field, foam-concrete mix, activation, grain size of sand, coefficient of structural quality, gelation, interpore partition
The optimization of the factors affecting the efficiency of Electro-activation of foam concrete mixes is carried out. For this purpose was applied mathematical planning experiment. As varied factors adopted grain size of sand grains, the value of the applied voltage and the duration of treatment. The mathematical models for strength, high density and structural quality are obtained.
Keywords: Variable electric field, foam-concrete mix, coefficient of structural quality,
The article deals with contemporary technology of decorating the front surface of the ceramic brick - the coloring of the polymer powder coatings, as well as the ability to create on the surface of the stretcher and degrade the visual effect of variations of the original brickwork of the brick.
Keywords: Brick, powder paints, degrade, design, polymer coating
The results of physico-chemical studies of micro-and macrostructure of fine-grained concrete hard pressing, used for making bread products for pavements . To improve the quality indicators ( bending moments ) in the fine-grained concrete mixtures were introduced damping additives such as ash microspheres - component slag mixtures . The essence is the replacement of the dense grain mixture with an equal volume of mineral supplements. Ash microspheres have a reduced strength and modulus . Of interest are preserved particles of hollow spheres of additive used , they are responsible for the effect of branching cracks. For experimental studies the author has developed a special method for determining the persistence of particles of ash microspheres after exposure compacting pressure. The quantitative ratio between the phases and composition of the mineral phase were determined by X-ray diffraction and optical microscopy.
Keywords: fine-grained concrete, hard pressing, components slag mixtures, ash microspheres, petrographic analysis, damping additives Derivatogram, diffraction, sample cylinders
We consider the relevance, peculiarities and the main stages of composite developments in the technology of production of finishing materials based on glass and ceramics. The description of technology of production of universal fragments, making the block-transformer. As basic materials for the development of applied chamotte ceramics and glass sheet.
Keywords: composite development, design, manufacturing technology, unit transformer, fireclay, glass
An article about the history of the building material (aerated concrete), its composition, properties, applications. It describes the achievements of scientists in the field of gas-concrete products, which contributed greatly to the development of the construction industry around the world.
Keywords: concrete, blowing agent, structure, cement, plaster, foam, perhydrol.
The article is devoted to the production of thermal efficiency of reinforced concrete construction. A complex technology and keeping warm concrete oformovannyh items in hot water, which reduces the cost of processing products.
Keywords: Concrete, hot concreting, water curing, temperature, energy
The article provides a classification of defects in ceramic bricks, and use a checklist for quality data collection and analysis for quality control
Keywords: Ceramic brick, defects, statistics, checklist, quality, technology, management
Results of researches on joint influence of specific pressure of pressing and firing temperature on physico-mechanical properties of laboratory samples on the basis of atyukhtinsky clay raw materials is shown. For the purpose of increase of frost resistance of the burned samples into structure of masses entered a carbonat containing modifying additive in an amount of 5%. For a quantitative assessment of influence of the specified factors on the main indicators of the burned samples researches with application of mathematical planning of experiment and computer processing of results were conducted. Specific pressure of pressing varied within 20±5 MPa, firing temperature – 1000±50 0C. By results of experiment the regression equations are received. It is defined that at increase of value of both varied factors, frost resistance and durability of samples increase, and water absorption – decreases. It is shown that, operating even with two technology factors – the specific pressure of pressing and firing temperature – it is possible to change significantly properties of finished products, and, using the received equations, it is possible to predict future properties of products at a stage of their production.
Keywords: frost resistance, burned sample, modifying additive, specific pressing pressure, firing temperature, mathematical experiment planning
The role of technical inspection as source of definition of an actual state of protecting designs is considered. Not destroying methods of definition of durability and thermal properties of materials of external walls are resulted. The thermographic method of not destroying control is considered, the list of thermal characteristics which can be defined with its use is presented. Modern requirements to thermal characteristics of external walls are presented and the materials most often meeting in protecting designs are considered. It is considered as a possible variant of increase of thermal properties of protecting designs - the device of hinged ventilated facades. The scheme of carrying out of a damage control, a substantiation of economic efficiency of the device of hinged ventilated facades and other technical advantages concerning other ways of warming of facades is presented.
Keywords: Technical inspection, thermographic quality monitoring, thermal characteristics of protecting designs, hinged ventilated facade
The article discusses the use of surface mats for thermoelectric heat treatment of concrete in the winter and complex additives. At the same destructive processes in the material does not occur and reduced thermal treatment.
Keywords: сoncrete thermoelectric mats complex chemical additives, heat treatment
The article describes one of the possible ways to improve the durability of roofing bitumen-emulsion mastics used in the repair and new construction due to the introduction of surfactant inhibitors.
Keywords: SAW inhibitors, roofing, mastics, durability, modifiers
Provides a method of representation of the scheme of control and evaluation of concrete strength at the factory. The method does not require detailed text-th maintenance, differs with visibility and convenient for workers of the construction laboratories.
Keywords: Сontrol of the selling of concrete strength, the party of commodity concrete mixture, the party of the precast concrete and reinforced concrete, the required concrete strength
The influence of fine-dispersed mineral adds on the properties of cement stone and concrete has been investigated. The possibility of production of necessary strength concrete with small sand without increasing of standard expenditure of cement has been designed.
Keywords: concrete, strength, small sand, add, mineral powder, cement, reduction, expenditure