The article briefly describes the history пояявления hydrophobic cements. Considered one of the прспективных directions for the use of water-repellent additives today - in the dry construction mixtures and confirmed the significance of this direction. The article describes the results of experiments on the impact on the indicators of a cement-sandy solution additives series GMI and the analysis of the received data  

Keywords: hydrophobic cement, hydrophobic additives, dry construction mixtures, porosity of a cement stone, strength cement-sandy solution, involving air, antifoam, antifoam agent

Study the properties of rubble, produced by crushing recycled concrete. Secondary crushing of concrete products in the mass contains 20% of the grains gravel fraction 20-40 mm and 40-50% of the fraction 5-20 mm. The resulting rubble is the brand for divisibility 300-600, and its abrasion is within the A2-A4. Both indices increase with increasing grain size. To assess the grain shape of rubble offered index φs, which is the ratio of grain surface rubble to the surface of the cube of equal volume.

Keywords: concrete, crushing, gravel, crushability, wearability

The paper is devoted to developing an approach to solving the problem of structure identification of layered minerals of the kaolinite group by the Rietveld method. The calculations of the intensity of the diffracted X-ray radiation are performed for the koalinit samples obtained from different fields. Qualitative agreement between calculated and experimental results has managed the solution of the identification problem for the kaolinite unit cell Glukhovtsy deposit. The obtained results indicate the possibility of identifying the features of the crystal structure of layered minerals by direct calculation of diffraction patterns.

Keywords: layered minerals, crystal structure, group of koalinit, diffractogram, X-rays, Voigt function, phase composition

  The analysis of the effectiveness of duration of electric vibration treatment of foam concrete mixture is carried out. The optimum fraction of filler for preparation of foam concrete mixture processed by variable electric field is defined. The influence of a type of cementitious matter by means of a comparison of domestic cement and Turkish (CEM I-42,5R) cement is analysed. It is established that at a short-term electric vibration treatment of foam concrete mixture there is a consolidation of the material of interporous partitions that leads to some increase in strength of foam concrete.

Keywords: Grain-size distribution, interpore partition, electric vibration treatment, ductility of slurry, clear portland cement, sinthetic frother, treatment efficiency

The possibility of carrying out the repair work intumescent fire retardant coating of cable type, end-of-life and Regulated lost their fire-resistance rating, with modern high-performance flame retardant formulations vspuchichvayuschihsya

Keywords: Retardant cable coating, fire-retardant efficiency, lifetime, maintenance and rehabilitation

In this article considered the questions related to the strength of normal sections in reinforced concrete beams, in which steel reinforcement is completely or partially replaced by a fiberglass rod. It was established that the strength of such beams is less, but the strain is significantly higher compared to the traditional reinforced. Calculating with current standards dramatically overstates theoretical bearing capacity of these beams with composite reinforcement

Keywords: concrete, reinforced concrete, strength, normal sections, steel, fiberglass reinforcement GFRP, composite materials, research

Winter concreting is considered. Problems and the reasons of a tverdeniye of concrete at negative temperatures and their possible decision. Introduction of additives for frost resistance increase. Thermos method. Concrete warming up. And as sharing of several methods for economy of resources and improvement of quality of winter concreting.

Keywords: concreting at low temperatures, a thermos method, concrete warming up, concrete concealment by a film and Temami, sharing of all methods

In this article considered the questions related to the possibility of rational use of composite materials in the construction and strengthening of reinforced concrete structures during the reconstruction of buildings and structures. In RSUCE proposed research program which aimed to solving the neglected issues in this direction, and to create a secure calculating apparatus.

Keywords: polymer concrete, epoxy resin, composite materials, fiberglass and carbon plastic reinforcement (GFRP, CFRP rebar), prototypes, research.

In this article considered the questions related to how the deformability is influenced in concrete beams, in which steel reinforcement replaced with fiberglass GFRP or a combination (hybrid). The latter is very important, as the current standards do not account the increased in strength of composite reinforcement, whereas its elasticity modulus is lower than the elasticity modulus of steel reinforcement.

Keywords: concrete, reinforced concrete, strength, deformability, steel, fiberglass reinforcement GFRP, composite, the modulus of elasticity, deflection

  The results of screenings’ modifying made by fractionating and improving of the grains’ form are given. The comparison of the main properties of sand, ordinary, fractionated and modified fractionated screenings are presented. The influence of different types of fine aggregate on mobility and keeping of concrete mixes, durability of a concrete at early and branded age is defined.

Keywords: screenings, modifying, fractionated, hollowness, water requirement, concrete mixes, mobility, keeping, concrete, strength, density

Formulating the basic calculating method for reinforced concrete structures based on common physical signs. There are prerequisites for the developed method.

Keywords: reinforced concrete pillar, the method of calculation, stress, Chart Options.

"The results of the computational experiment, Show, that the dependence of the relatively carrying capacity on the relatively eccentricity is almost independent on the reinforcement Ratio or on and concrete type. "

Keywords: High- Strong concrete, self-compacting concrete, modulus of elasticity, column.

Knowledge of the kinetics heat irradiation give more sources for understanding physico-chemical process connected with solidification astringent. On curves of heat irradiation you can traced three stage and then read the kinetic equations describing each of them.

Keywords: kinetics, heat irradiation, speed, stages, astringent

Compressive strength of harden cement paste modified with white soot metakaolin and different superplasticizers ranged from 69 to 182% in comparison with non modified specimen. The elastic modulus ranged from 89 to 137% in comparison with non modified specimenand the measure of creep from 36 to 542%.

Keywords: portland cement, white soon, metakaolin, superplasticizers, compressive strength, E-modulus, creep coefficient

In article the review of methods of decrease in energy consumption and preservation of quality of bitumen at the process its dehydration at asphalt plant.

Keywords: Decrease in energy consumption, preservation of quality of bitumen, asphalt, asphalt plant, dehydration boiler.

  Due to the increasing requirements of modern building materials increased interest in energy-efficient building materials. The dependence of the viscoplastic properties of slurries for foam concrete production on the composition and properties of the components of mix. To determine the regulatory properties of cement-sand slurries should consider the state of the water in a dispersed system.

Keywords: Foam concrete water content, water forms of communication, water retention of cement and sand, formation of foam membrane

Proved that the use of microwave energy for dehydration bitumen does not affect its quality. The mathematical description of the flow of bitumen by the ADF estimators dehydration and product performance. Shows the advantages of the low-temperature dehydration technology from the existing asphalt.

Keywords: coating plant, bitumen, bitumen, quality, dehydration, microwave energy, flow, performance

The article deals with the results of studies of the effect of additives on the grinding intensifiers processes of structure binders. The studies were conducted by X-ray diffraction analysis of the samples of compositions with applicable supplements.

Keywords: slag-alkaline astringent, intensificators of grinding, grinding intensifiers, X-ray analysis, X-ray diffraction, interference maximum

  In article are offered results of research of sinter ability clayey silica clay. It is shown that the ceramic shard based on the silica clay have a low average density, increased firing shrinkage, porosity and water absorption. Increasing the firing temperature to a large extent determines the increase in shrinkage and reduced water absorption. At least increase the density. The data presented in the paper can be a useful technology of brick factories, employees testing laboratories and design companies, geologists studying nonmetallic raw materials, as well as undergraduate and graduate students specializing in this field.

Keywords: Silica clay, sinter ability, average density, water absorption, temperature, raw material

The article deals with the results of studies of the effect of additives on the grinding intensifiers processes of structure binders. The studies were conducted by differential thermal analysis of the samples of compositions with applicable supplements.

Keywords: slag-alkaline astringent, intensificators of grinding, differential thermal analysis , dehydration, endothermic effect, exothermic effect

  The paper presents the results of a study of powdered ceramic materials based on silica clay the production of bricks method of compression molding. It is shown that the press powders based on silica clay pressed in a wide range of moisture content, the maximum compatibility in terms of the solid phase is achieved at a certain humidity in the range of 15–30 MPa compaction pressure (depending on the type of molding boxes and humidity), the density of compacts in terms of solid phase begins to exceed the average density of the material (density in the piece), for pressing molding powders with a moisture content below the optimum, almost regardless of the specific pressure extrusion, different-density compaction can reach 4–6%.

Keywords: Silica clay, compressibility, moisture, pressure, density, press powders

  In article are offered the main problems arising at release of a figured brick are shown and versions of their decision. Prospects of production of a figured ceramic brick on the basis of siliceous breeds – silica clay the description of technological decisions is given by production of products by way of compression formation. Offered classification of a figured brick by a form and appointment, and also design of the most demanded forms of an obverse brick is given.                                                                          

Keywords: Figured brick, silica clay, form, pressed brick, production process, design.

Domestic construction materials industry produces expansive binders providing the concrete self-stress up to2MPa. A hypothesis on the catalytic role of lime in the formation of the active ettringiteis introduced. On the base of the hypothesis a proposal of the self-stress kinetics optimization with sulfate-containing mineral supplements, neutralizing lime in the early stages of the cement stone structure formation is given.

Keywords: cement, straining cement, mineral supplements, self-stress kinetics

  Petro graphic analysis of the structure of foam concrete, reinforced with glass dispersion and synthetic fibers showed that the real nature of the fiber controls the parameters of their structure and strength.

Keywords: fiberfoamconcrete, structure, form pores, fiber, strength

  In article negative influence of polymeric construction materials on a human body and surrounding his environment is shown, and also results of earlier carried out tests are given. The construction material – fiberfoamconcrete, which proved as a material possessing low heat conductivity, at the expense of strong porous structure of mezhporovy partitions is revealed modern constructional and heatinsulating.

Keywords: fiberfoamconcrete, polymers, heat insulating materials, fire safety, construction materials