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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...


 Information for builders



 GRC  -  material  that  need  to  all!

GRC (GRC) - is a composite material consisting of cement-sand matrix reinforced segments (fiber) alkali-resistant fiberglass. The final properties SOF depend on a number of parameters, such as the method of manufacturing the composition of the mixture, the type of fibers used, the length and orientation of the fibers in the mixture used additives, etc. Thus, the manufacturer has the discretion to set the desired characteristics of the material in order to obtain products depending on their destination adequate.
   As a composite material, GRC combines typical cement grout high compressive strength with increasing significantly due to glass fiber reinforcement, impact strength (10-15 times), flexural strength and tensile (4-5 times). In this GRC does not corrode and stretching, flammable and has a very high flame. SOF from the product can be manufactured with a relatively small cross-section (5-20 mm), and hence low weight, which allows to obtain savings in construction, both due to reduction of material supporting structure, and reduce costs for transport and assembly of products.
   GRC does not contain metal reinforcement and coarse aggregate, on the face of products no pores and cavities, which causes increased architectural expressiveness and plasticity of the material.
   High durability and resistance to chemical attack allowed GRC widely used in engineering structures on the Ring Road and the 3rd Ring Road in Moscow. For example, as a permanent formwork-facing in car tunnels and underpasses, as a curtain to block the passing buildings, as well as part of drainage systems on motorways. With GRC structures built on road tunnels Korovinskoye highway overpass over railroad Savelovskaya, Leningrad, Yaroslavl, Gorky overpass Congress aimed at Moscow, etc.
   Currently, GRC design Ustyinsky installed on the bridge overpass at Fili, Berezhkovskaya Luzhnetskaya and embankments. GRC decorative applied on the central group of buildings in the new Olympic Village.
   In monolithic housing construction and renovation projects GRC cladding are the optimal solution for device ventilated facades. It is thus possible radical change in the architectural appearance of reconstructed buildings, as GRC panel may have a variety of three-dimensional shape and color solutions.
   If necessary GRC elements are made with metal parts and mortgage releases.
   At present, a reliable and effective system of mountings hinged panels of domestically made to compensate for the non-normative bias of the original surface of the facade.
   Fiberglass can be successfully used as one or two layers enclosing sandwich panels in panel construction. At the same time, maintaining the current park forms on plants JBI, can significantly increase the layer of insulation to reduce weight and cost of the panels, organize ventilated (optimal for thermal comfort) in precast facades housebuilding.
   Today it is produced prototypes of such panels.
   GRC has been used successfully in small architectural forms, the decorative elements of the facades, fencing for loggias and various designs for special purposes, such as transformer boxes, garage gates, manholes, underground laying of communications products, etc.
   Given the extraordinary flexibility of manufacturing technology products (hardware British firm "Power-Spreys") can manufacture virtually any product range.
   High strength and performance indicators GRC, as well as increased flexibility and architectural expression products of this material provided to it widely used in foreign construction. We can confidently say that in a short time scale of its use in our country will not smaller.