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Protect the surface of the concrete floor
To protect the concrete floor, which is operated in the normal mode, or is subject to wear in areas with high traffic, there are several ways to protect the surface.
   Comparable ways: their cost, appearance and ability to perform the task to protect.
   In this article, we consider three ways to finish and protect the floor. Each of them has its advantages and disadvantages.
   Thin fil...

Finishing compositions based on water glass. Part 3
When used as part of exhaustion moderator comes coagulation and solidification of liquid glass. However, due to the presence in the composition of Portland cement with a finishing time is an increase strength of the coating due to hydration of cement minerals. Thus from colloids formed during the coagulation liquid glass are actively assigned to the water for hydration of cement, a porous media formed tumors filled Portland cement, which leads to...

Finishing compositions based on water glass. Part 2
Studies in Berlin Institute Federal institute for Materials Research and Testing, show that the average density of 1730 kg/m3 brick large proportion of pores having a size in excess of 1 micron is more than 90% [3] and they are responsible for the increased migration of fluids through brickwork.
   Most fully meet these requirements structure obtained by coagulation and water-soluble potassium silicate forming silica with a high sp...

Modernization and repair of self-propelled machines. (3)
Hardening electrolysis BORATING hinge pins and bushings mates working equipment hydraulic excavators EO-4121 (EA-4321) gives an increase in wear resistance 4-6 times compared to the bulk quenching details.
   Taking into account the high wear resistance of brazed blades, hardened sintered alloys (see Table 1), are recommended for carbide knives dumps graders DZ-122 and RS-98, combined machine E-405 based on KAMAZ, for front dumps a t...

Specialized exhibition Architecture. Construction (END)
Mari-lime brick and gas silicate blocks
   JSC "MZSK" produces silicate brick and a half, color (white, yellow, black, red, blue, green, brown).
   For the production of silica brick used quartz sand from quarries near the plant. Limestone enters the factory with Dobryatinskogo deposit Vladimir region. Silicate brick (Table 1) is used for masonry exterior and interior walls of buildings and structures, as well as ...

Geophysical processes primers and security. Part 5
In the center of Moscow can distinguish vertical structure comprising a crashing into the Earth`s crust magma elongated cylinder (Fig. 2) [5]. In the center section marked lack of extensive vertical zone converted waves ("blind spot"), going from the depths of 70-80 km to 7.5 km. Such "blind spots" are characteristic of the earth`s crust with the introduction of monolithic dense mantle rocks such as gabbro, diabase, etc. In such a zone Tashkent e...

Finishing compositions based on water glass. Part 1
The quality of the decoration of buildings for new construction and reconstruction depend not only on their aesthetic, but also the operational parameters, as good-quality finish - a guarantee of durable service basic designs, long maintenance-free operation, the costs for maintenance and care. Traditional binders used for the production of finishing compositions, liquid glass is widely used, but it has some drawback: coatings based on it gaining...

On possible amendments to the equation Griffiths
Griffith presented a picture of destruction allowed to formulate the problem of determining conditions of the beginning of crack propagation and find its general solution.
   As seen from the above schemes, in the process of crack propagation material directly adjacent to it "coasts" unloaded relaxes. This means that the stress and strain it decreases, and the elastic energy stored earlier in this area of ​​the body is re...

Construction skyscrapers - the requirements of modernity. Part 4
The program is a high-rise building in Moscow
   The project is now a high-rise building in Moscow is implemented in two main areas: the construction of business center "Moscow City" and implementation of the program of the Government of Moscow "New Ring of Russia."
   1. Moscow international business center "Moscow - City"
   The project includes the construction of buildings on the territory of abou...

Degree project - beginning of the road. (3)
Given the great diversity of subject matter and content of diplomas in various specialties, the jury is faced with great difficulties in determining the winners - "Who better violinist or a dancer?". Nevertheless, often based on emotional perception and can estimate the relevance and novelty, and the author`s contribution to the thesis project or job. Absolute winners in recent years have been graduates of Rostov CSO GASU St. Petersburg, Nizhny N...


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 Building  materials  based  magnesial  raw  (END)

Research results in the systems MgO-SiO2, MgO-FeO-SiO2, MgO-CaO-SiO3 in the presence of aluminum silicates with an admixture of iron oxides and other compounds allowed us to develop two-component blends for the production of low-temperature synthesis of pyrogenic when building ceramics complex enstatite-mullite, mullite-cordierite composition. To Fazoobrazovanie detected by X-ray, petrographic analyzes and other baked crock include: monticellite cordierite, enstatite, indialite, wustite, etc. The compositions of two-component blends for ceramic products, consisting of co-products
   GOK, containing in its composition and magnesium silicates fusible clay ensuring plasticity mass and high technical properties of products (heat resistance, tsekoustoychivost, low humid expansion and CTE).
   Developed porcelaneous mass using magnesia raw materials for sanitary and decorative architectural products and ceramic materials for acid products.
   The possibility of using the test magnesia raw materials in glass-ceramic products (glazes, tiles, mineral wool, stone molding). Investigated crystallized glass with oxides rO2, Fe2O3, TiO2, and others, developed and introduced white compositions fritted glazes (with proproduktom Kovdora LEAD), as well as different formulations of enamel color gamut (without pigment) on the basis of co-products Kovdorskiy, Kachkanarskogo and Donskoy GOK . All glazes and enamels are distinguished by high technical properties: fluidity, density, water resistance, CTE, microhardness, etc.
   The expediency of the use of by-products in their natural state as aggregates and fillers in the production of concrete, mortar and other civil works, as well as plastics, paints, pigments, etc.
   Rubble and sand from free products satisfy the requirements of the standard. Obtained for concrete aggregates of magnesia raw materials (of associated products: career or enrichment) classes: B10, B15, B25, B30, which differs from standard concrete aggregates to traditional forms of higher density (up to 3.5 t / m³) and radiatsionnozaschitnymi properties.
   In particular, concrete with radiation-protective properties on their aggregates of produced Kovdor raw materials used in the construction of the 1st and 2nd blocks Kola NPP. Developed refractory concretes hydrated to serpentinite aggregates and aluminophosphate ligaments. These types of protective concrete used in the liquidation of the accident naChernobylskoy NPP and are recommended for new generation nuclear power plant construction.
   As a result of extensive pilot testing of technogenic raw materials with a high content of magnesium silicates saving technologies developed manufacture binders, autoclave and ceramics, concrete and mortar; standard and conducted field tests on the durability of the products obtained (20 years). Built home in Berezniki Kachkanar, Narva, Kovdore etc. A set of normative and technical documents.
   Developed the technology of porous lightweight aggregate for concrete and pigments based on calcium-magnesium silicates - in produced diopside rocks mica deposits Aldan (Yakutia). The resulting pigments are distinguished by high decorative, corrosion and other properties and can be used in the manufacture of building materials using solid-phase synthesis or hydrochemical. Tests developed materials were carried out in enterprises trust "Aldanslyuda" Pavlovsk and lime plant.
   Implemented widespread introduction feed containing magnesium silicates in the production of building ceramics (plates, tiles, tiles, majolica ware, etc.) in the factories of ceramic products in Kovdore, Khromtau, JSC "LZKI", JSC "Nefritkeramika", JSC "Quartz" as well as in concrete and dense cellular structure (concrete and concrete products, aggregates, aerated concrete blocks for housing construction - binder plus fillers) on reinforced concrete factories Kachkanar Ekaterinburg area.
   Distinctive features developed and implemented resource-saving technologies of building materials are: the use of unconventional materials and full or partial replacement of cement, lime, zirconium, nepheline, pigments and other materials imported from countries near and far abroad. Spotted an economic feasibility and efficacy of a promising new resource base - technogenic raw materials with a high content of magnesium silicates for the production of a wide range of building products and materials, which is 58 512 rubles.
   For the general implementation of resource-industry, energy production technologies walling, cladding, thermal insulation and other building materials based on magnesia raw materials required investment.