Revitalization  of  public  science  and  technology  policy  in  the  construction  and  housing  sector.  Technology  retrofitting  first  mass
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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



 Revitalization  of  public  science  and  technology  policy  in  the  construction  and  housing  sector.  Technology  retrofitting  first  mass

1. Composition
   Technology retrofitting first mass series include the following main areas:
   Reconstruction and modernization of housing, buildings for production purposes, as well as systems engineering;
   brownfield existing neighborhoods and districts;
   insulation walling;
   effective systems for seismic protection of buildings and structures to reflect changes in seismic zoning maps;
   elimination of obsolete technology of buildings and structures, including the machine;
   technologies and equipment for recycling and reuse of products eliminating obsolete buildings.
   2. Purpose, basic functional parameters
   Reconstruction of housing consisting of houses mass series, represents an unprecedented in its scale and complexity of the construction program. Depending on the territory of the region and the location of settlements, urban neighborhoods, apartment complexes, structural and technological characteristics of the various series of homes, their technical state solution to this problem includes engineering tasks such as reconstruction of buildings, their modernization, liquidation, walling insulation, replacement of engineering systems , seismic protection, etc. In many cases (for example, for the city of Moscow is more than 30%) are not subject to the reconstruction of homes and require the demolition and subsequent processing of waste-disposal and recycling.
   Demolition of buildings and structures, end-design life - the most important issue for Moscow and all major cities of the Russian Federation. Technology and equipment for its solution must:
   meet the requirements of engineering and environmental safety in dense urban areas;
   To ensure full and partial demolition of buildings and structures up to 30 m, disassembly, transportation and processing of demolition for their reuse in construction.
   3. Sphere of application
   Under the current program in Moscow to be demolished and reconstructed about 10 million m2 of housing (780 buildings). Total capital 11,500 five-storey prefabricated houses. On the territory of the Russian Federation, about 400 million m2 of housing - Housing first mass.
   Technology retrofitting mass series can also be used for the reconstruction of industrial buildings and structures, to eliminate the effects of natural, man-made and man-made emergencies and disasters.
   4. Basis for Selection
   Rebuilding homes mass series is of great social importance, is one of the real means of improving the quality of life, sustainable development of the country. It is also a way for a large economy logistics and natural resources through the full use of established engineering infrastructure in towns and cities.
   5. Status and trends of development
   The problem of reconstruction of areas characterized by mass building today for a number of major cities, especially in Eastern and Central Europe (Germany, Poland, Bulgaria, etc.), which were also used like urban solutions. There are a number of tested and proven from an engineering standpoint reconstruction technologies, including demolition of buildings and structures. Currently, important systematic approach to solving this problem, testing of new technologies, the development of domestic machinery and equipment. Available scientific and industrial groundwork allows you to perform this task for 5-7 years.
   To be continued