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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



 Measures  to  improve  environmental  safety  factory  of  concrete

Environmental issues , especially in a city like Moscow, acquired particular importance . Factories for the production of building materials , products and structures included in a single building complex located in the city, not yet fully meet the requirements of environmental safety . The reasons are many . This outdated technology , imperfect process equipment , large amounts of waste and lack of environmental awareness of professionals and workers .

   JBK Rostokinskiy plant - one of the largest factories DSK -1 , Moscow. Taking into account the importance of environmental protection measures , the company`s management in the past few years focusing efforts on reducing air pollution , water and soil pools . Developed a set of measures to protect the environment. A map showing all the departments of the plant and all possible contaminants , where they may occur . Ways of improvement of technology , equipment upgrades , recycling. All of this is ultimately directed at improving the human habitat , flora and fauna .

   To do this, set a more modern and less energy-intensive filters , built silos for storage of sand and gravel with steam registers. In concrete mixing unit mounted pneumatic control system CYCLE - BS.

   Efficient in terms of economy and environmental safety was the use in the preparation of magnetic water concrete mix . This technique has allowed to abandon the use of superplasticizer -3 and other chemical additives , which greatly enhanced the ecological situation in the manufacturing plants . The air was cleaner not become odors and vapors that provoke respiratory diseases . From the standpoint of the technological parameters magnetized water fluidity of the concrete mix increases by 5-7 cm and saves up to 10 % cement .

   One section of the program is devoted to waste reduction . The control over the process of their formation, accumulation and disposal. At the plant built special areas with concrete or asphalt for the collection and temporary storage of waste that prevents contamination of soil and groundwater . The waste is collected in separate containers , which prevents human contact with them and do not pollute the environment .

   Waste 1 , 2 and 3 classes of danger transferred to other special purpose companies with their treatment . Such a waste , such as wood and rubber waste, used in the factory again. Spent abrasive wheels are used repeatedly in mechanical-repair shop for the manufacture of new abrasives.

   Works closely with many scientific organizations, with SSES SVAO Moscow , the Moscow State Authority for the protection of land and waste , with Moskomprirodoy . The factory service works effectively on environmental security .