Experimental  studies  of  fragments  exterior  walls  with  ventilation.  Part  2
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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.
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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
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Mari-lime brick and gas silicate blocks
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Finishing compositions based on water glass. Part 1
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Construction skyscrapers - the requirements of modernity. Part 4
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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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 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.