Physical  principles  of  receipt  of  different  materials  range  of  properties.  PART  1
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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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 Physical  principles  of  receipt  of  different  materials  range  of  properties.  PART  1

The paper discusses the chemical and physical principles of obtaining materials of different range of properties, which we believe will be in demand in the third millennium (1, 2). The first principle - environmental security - includes two concepts: cleaning the biosphere and ecological purity of the material, such as decorative. Statements FM Dostoevsky that beauty will save the world, in this case literally - man-made obstructions lithosphere transformed into a beautiful roasting alumina mosaic smalt. In these materials, powder base comprise natural clay-containing products - loam, white and blue clay, Fe (II) and Fe (III) - containing waste metallurgical industries that replace Portland cement, fine sand-waste containing P2O5, as well as dyed-mineral products waste. As you can see, powders contain substances that Portland cement systems "do not like". Liquid mixing for such systems is the technical phosphoric acid a certain concentration. Basic chemical process ensuring system hardening into stone, is the formation of sparingly soluble phosphates and silica gel - thermodynamically stable materials in the environment, characterized by a lower energy level. The resulting materials distinguishes prirodosohrannost, wide color range, high resistance to acid environmental aggression (sulfuric acid and nitric acid) than, for example, silicate materials, since phosphoric acid stronger than silicon.
Furthermore, these materials have the ability to harden at the same speed as the positive (20 ... 25 C)
and negative (up to -18 C) temperatures, because these systems are protic and are capable of transferring protons accelerated by the system of hydrogen bonds at low entropy. Thus, the aim of the first solutions - achieving aesthetics and resistance prirodosohrannogo material in the environment.
In view of environmental safety purpose of the second principle of the creation of materials of the future can be formulated as "heat and silence the world needs." One solution - the creation of polytropic compositions. It should be noted that, first, the medium-matrix in all cases cementitious materials presented the same nature, and secondly, depending on the state of aggregation of the filler dispersed phase (solid, liquid or gaseous) achieved properties that differ significantly in their values ​​- strength, heat and sound dampening, etc. You have two ways to solve the problem of what to do. properties as a little closer to each other. The first way - change. and crucially, the properties of rock layers in the solid foam, the second - the creation of polytropic materials. In accordance with the concepts of chemical engineering implementation of the first path may be based on the principles described in (1, 2).