Experimental  studies  of  fragments  exterior  walls  with  ventilation.  Part  2
  ► Materials
  ► Equipments
  ► Tehnologies
  ► Information
  ► Contact us
  ► Home

 
 Site Search

 

 

 

 
 Information for builders
 

 
 The new articles

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
 

 

 

 Experimental  studies  of  fragments  exterior  walls  with  ventilation.  Part  2

Fragment of the outer wall from the ventilation systems with non-insulated screen were light panel on a wooden frame, including mineral wool insulation, the air layer thickness of 50 mm and non-insulated screen on the outside. Joints are insulated with mineral wool inserts a thickness of 0.05 m, a bulk density of 75 kg/m3. Fragments of the internal walls of a thickness of 0.16 m and 0.22 m thick slab adjoined butt.
   In the outer layer of the screen light hinged panels was done in the top and bottom five holes with a diameter of 17 mm. In the upper part of the inner cladding have also been done five holes of the same diameter.
   Analyzed fragment of the outer wall from the ventilation systems with heat-insulated screen comprising paneled wooden frame with a size 20001000164 m inner and outer cladding are made of gypsum boards 12 mm thick. Insulation plates were based on basalt fiber thickness of 50 mm, with an average density of 100 kg/m3. Screen test consisted of a fragment of facade insulating panels "Polialpan" with insulation (polyurethane foam), 40 mm thick with an average density of 30 kg/m3. Between the panel and the screen on the relative air layer had a thickness of 50 mm. To create an air flow in the structure at the lower and upper outer layer screen was done by eight holes with a diameter of 9 mm. In the upper part of the inner layer was also done eight holes of the same diameter.
   Combustion study included determination of thermal resistance barriers, temperature thicker on the inner and outer surfaces, heat flow in the absence and presence of air filtration.
   Tests were conducted in a special climate chamber, which was divided into warm and cold compartment. Between these offices were established test panels with ventilation devices. Temperature in warm and cold chamber offices maintained at a predetermined level automatically.
   As the temperature sensors used copper-constantan thermocouple tape.
  
   To be continued.
  

  .