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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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 Environmental  and  economic  problems  construction  industry

Environmental protection, including the protection from pollution of air and water pollution of the planet, soils, sustainable use of natural resources, recycling industrial waste and reclamation - one of the most pressing global issues of our time.
   Basis for the development of human society and meet the ever increasing needs of humanity, including housing, is a scientific and technical progress. This involves the development and implementation of new efficient technologies, materials and scientific achievements. All this should not be closed only on the economic side of the issue.
   Modern conditions being put to more complex tasks - namely, preventing possible environmental disasters and preserve life on Earth.
   Scientific and technological progress, as well as any phenomenon has both positive and negative effects on the environment and people. Positive phenomenon - the strengthening of material-technical, social, aesthetic, and other levels of humanity. Negative - the materialization of a huge amount of natural materials and the associated development of various industries and tremendous pollution of the human environment.
   Sufficiently large share of the total pollution of the environment, about 12%, accounted for the construction industry. Building materials industry pollutes the environment from raw material extraction, processing and finishing operation of buildings and structures.
   The industry annually billions of tons of raw materials processed, spent a huge amount of fuel and electricity. All this is done in enterprises with insufficient levels of imperfect technology and process equipment. And every imperfection of technology - a direct path to environmental pollution, increased environmental hazards.
   Reduced pressure on environmentally hazardous nature and man by the enterprises of the construction industry is possible through the introduction of advanced automated technology, based on the latest achievements of science and technology. Such technology should not only allow to reduce capital, labor, material consumption, energy consumption of products based on natural raw materials, but also to promote the wider use of industrial waste and significantly expand the resource base.
   Particularly noteworthy is the utilization of industrial wastes in terms of their environmental cleanliness and environmental safety of the finished product.
   Take all necessary measures to prevent the use of environmentally harmful waste. At the disposal of workers of the construction industry has a wide range of possible production of high quality, competitive, cost-effective and environmentally safe products.
   Fundamental basis this should be ecological and economic literacy and environmental cleanliness of each worker building materials industry, which fully complies with Art. 58 of the Constitution of the Russian Federation: "Everyone shall be obliged to preserve nature and the environment, and care for the natural resources."