On concrete and mortars

In the article "On the pre-stressed reinforcing bars highway bridges" ( "Construction and real estate" № 18, 16.04.2002, pp. 6) brought the hard way prefabrication reinforced concrete bridge beams with regard navivky perednapruzhenoyi strings (high-wire) in the ribs on the sets of beams pair of internal final and intermediate anchors suggested by the authors. This consistent reinforcement layers are formed symmetrical and asymmetrical stretches napruzhuvanoyi threads by patent number 3672 RB, shifted relative to each other in the even and odd layers of sutures. In the known technical solution "Belhyprodora" reinforcing 15 m bridge beams made of three separate beams located at different altitudes on the cross beams.

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Report of the Chief Engineer NIEPHP Institute BELNIYIS " R. I. Vihdorchyka Experience designing and construction of buildings for different purposes based on frame-svyazevyh skeletons mVb-01, September 22 made it to the international scientific-technical conference "The multi-building monolithic and precast-monolithic frameworks. Passed more than 6 years after the former GOSSTROY the initiative of the Government of the Republic of Belarus Republic of scientific and technical program "Light House". Then 6 years ago, the institute "BELNIYIS" originated the idea of prefabricated monolithic frame a completely new design, which, according to the "Light House" was drawn to weapons specialists Institute Belproyekt "when designing their experimental 4-storey residential building, which now already built in Minsk neighborhood Olshanka-6. So long construction period - a result nerehulyarnosti its funding. As used zhiz not stand still during this period, the idea found full frame real contours, confirming their competitiveness and viability of the design and construction of buildings for different purposes. Each re-projected and one that is built using the frame system mVb-01 object shows the advantages of this framework in comparison with the known frame systems. Developed by the Institute BELNIYIS "prefabricated monolithic frame universal, is with those produced by Belarusian plants construction industry products, has a limited range of structures (columns and bahatopustotna plate) that are, easy to install. What are these objects? It houses various storeys in Gomel, Minsk, Novgorod, Odessa, Svetlogorsk, seven and two-story garage in Moscow, five-story parking garage, in Minsk, shestypoverhova administrative building of Gazprom in Moscow, five-storey hospital in Brest, two-storey shop in Minsk. This customer-investors whenever tempted to get a free lightweight and comfortable, the appointment of different space-planning decisions, which cost below the cost of traditional wall and frame systems. Experience in designing and constructing new buildings on the basis of prefabricated monolithic frame of mVb-01 gave additional impetus to further improve the space-planning and technical solutions to the carcass, which reduces its materialomistkist labor and its installation, as well as expanding its architectural features. The design and construction of a 4-storey apartment building in Novgorod was used eye frame 7,2 x7, 2 m, which allowed to perform all future planning wishes of tenants. (Recall that a house in Vilshantsi eye is 6.0 x6, 0 m). But the construction of 7-storey garage in Moscow at the invitation of specialists BELNIYIS and Gomel ASMT number 27 was changed compared to when used in building construction technology Vilshantsi mounting frame. For those that support the floor slabs to concrete bridges metalliches hah that navishuyutsya the columns, was applied the system of metal struts and wooden runs.

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Among those making predictions - Mark Shykovich Finer, PhD, Honored Inventor of Ukraine, the author of 150 scientific papers on betonovedeniyu. His specialty - additives to cement and concrete, diagnostic structures. It is easy to guess that the projections known specialist in the country relating to construction, and in particular the consequences of violations of technology and nezridka and false solutions specialists in the manufacture of concrete structures. In the mid 90-ies in the northern cities of Russia wave collapse. Then the sight of a bridge collapse metro station "Lenin Hills in Moscow. Why did this happen? As Mark says Finer, in pursuit of quantity and cheapness neglected quality in concrete, which were limited to essential items domishuvaly hloridnyye supplements. They speeded up the pace the pace of hardening concrete, but that is extremely dangerous, roz'yidaly metal armatures. As a result of the construction project does not cope with stress. Spohopylysya and Ukrainian builders and finally listened to the experts betonovedeniyu: chlorides dangerous for reinforced structures.

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