SCHeben for road building
From all natural materials used in road building rubble, perhaps, it is possible to consider as the core.
Volumes of production of rubble exceed 3 billion cubic metre a year. The share of Russia makes about 5 % from this sum, and about 70 million cubic m is annually used in road building.
In a total cost of building of highways costs for materials exceed 60 %. Traffic safety, economic efficiency of motor transport, and also consumer properties in many respects depends On their quality (couplin factor, flatness etc.) and durability of structures. Requests to the rubble applied to the system of the top layers of road clothes are especially high. It should be stable against negative effect of natural factors, and also to mechanical istiraniyu from moving transport.
The rubble applied in road building can be divided on two groups:
- Sedimentary rocky and friable rocks. Limestone, dolomite and other breeds concern this group, krupnostyu fractions
5-20, 20-40, 40-70, 0-40 and0-70 mm. Mainly such rubble is used for the system of the bases of clothes of road. - metamorficheskie and magmatic rocks — a granite, gabbro, diabase of fractions
of 5-20 and20-40 mm. It is used for the bottom layers of covers.
Granite rubble:
- The contents of grains of rubble lamellar (leschadnoy) and iglovatoy forms, in percentage on weight 18-25. Volume bulk weight of rubble 1,37 t.kub.m
- Frost resistance of rubble F-400
- Mark of granite rubble on durability 1400
- Mark of rubble granite on deterioration I-1
- The contents in rubble of grains of weak breeds of 0,2-3,5 %
- Granite rubble corresponds to GOST 8267-93
Granite road rubble — effective and abrasive resistant road cover. Rubble of fraction of 5-10 mm — the best large filler for vyisokomarochnogo the concrete applied in pouring of bridge designs, Fraction 20-40, 40-70 also uses stable demand and is applied in building and repair of railway embankments, tram lines and pillows of highways.
— the unique construction material having high stability to temperature differences — it maintains limestone to 100 cycles of freezing and thawing, not having lost the prochnostnyih characteristics.
The dense ground or concrete is applied as a pillow under the road basis, such, as asphalt.
Calcareous rubble — less strong, than granite, however very well consults with the problems in road building.
Limy rubble:
- The contents of grains of rubble lamellar (leschadnoy) and iglovatoy forms, in % on weight of 10-12 % the Form of grains I
- The contents pyilevidnyih and clay particles in % on weight of 1,5-2 % (0-0,20 %)
- Mark of rubble on durability (divisibility) of other 11-16 % M600 (800)
- The contents in rubble of grains of weak breeds in % on weight of 5-9 %
- Mark on frost resistance of calcareous rubble F 150
- Bulk density of rubble limy 1300 kg / cubic m
- Humidity of rubble of 3-4 %
- Porosity of rubble of 5,4-7,3 %; Hollowness of 48,1-50,8 %
- Water absorption of rubble of 2,5 %
In separate group it is usually born so-called «kubovidnyiy» rubble (fr.5-20, with the contents of grains leschadnoy and iglovatoy forms less than 15 %). Often recently it name «future rubble».
What its qualities in comparison with application of habitual kinds of rubble?
- It is stronger also than it «treschinnovatost» more low;
- In 2-3 times the durability of concrete designs and asfaltobetonnyih covers raises;
- The cost of rubble and binding (bitumen, cement) decreases;
- The compactibility factor asfaltobetonnoy mixes comes nearer to unit that supplies durability and increases frost resistance of road covers;
- Decrease time and expenditures of labour on stacking asfaltobetonnogo covers to 70 % (for cover stacking it is required only two passes of a skating rink instead of ten at use of usual rubble).
But it is impossible to forget about such important characteristic of rubble, as a radio-activity. For building of roads granite rubble of II class of a radio-activity (from 370 to 740 Bk/kg) is used.
It is introduced: on September, 06th, 2007
From all natural materials used in road building rubble, perhaps, it is possible to consider as the core. ...
Vidyi rubble for road building
From all natural materials used in road building rubble, perhaps, it is possible to consider as the core.Volumes of production of rubble exceed 3 billion cubic metre a year. The share of Russia makes about 5 % from this sum, and about 70 million m3 is annually used in road building.In a total cost of building of highways costs for...
Minprom recommends heat exchanger KOSSET introduction in a power industry
Power consumption of industrial productions in Russia it is significant above indicators of industrially developed countries. So, expenses of energy for production in the chemical and petrochemical industry of Russia on 30-60 % above, than in similar foreign productions. Thus annual growth of number of failures on objects of power system testifies to wear of a fixed capital which has...
Wooden frame walls
In comparison with rublenyimi wooden frame houses require much the smaller cost of wood, is easier in building and is more economic in operation (at corresponding system of heating). Furthermore such labour-consuming work, as lifting of bars and logs on the required height disappears.The skeleton of walls consists from top and bottom obvyazok, racks and supplying its geometrical stability podkosov...
Derevyannyie frame walls
In comparison with rublenyimi wooden frame houses require much the smaller cost of wood, is easier in building and is more economic in operation (at corresponding system of heating). Furthermore such labour-consuming work, as lifting of bars and logs on the required height disappears.The skeleton of walls consists from top and bottom obvyazok, racks and supplying its geometrical stability podkosov...
Apparatyi DYTRON for welding of plastic pipelines
At building of pressure head and drainage pipelines the question of a choice of pipes is even more often decided in favour of plastic — polyethylene and polipropilenovyih – because of advantages of these pipes before steel. It is their corrosion stability, durability, chemical inertness, an aesthetics, lower cost both pipes, and installation.The greatest distribution pipelines from polypropylene SH have...
Dizayn a children’s room
At creation of an interior and a choice of colour the teenager knows precisely, what colours like it also what colours of "its colour». The Fashion and colour of a room of the child are chosen by parents, but already rather early children start to give us signs on preference of this or that colour. Often the choice occurs depending on temperament of the child —...
the Timbering for monolithic building (the Part XIV)
FIXED TIMBERING WITH APPLICATION OF DREVESNO-CEMENT PLATESThe original technology of erection of monolithic walls with application of drevesno-cement plates was developed by the company «Alkomp Europe». The plate of 35 mm is produced in the thickness by a method of moist pressing wood schepyi, previously obvolochennoy cement. Has an excellent sound absorption, has high fire-prevention properties, it is well processed...
Zagadochnyiy granite elimination
The few know, that such granite elimination, but practically all saw it in Moscow — new children's playgrounds sleep off this material, and the park Tsarina's all is penetrated by granite paths...Than it is good — granite elimination — where is still applied and how looks? In a picture — a usual Moscow court yard, otsyipannyiy granite elimination. Let's begin...
the Timbering for monolithic building (the Part VI)
The universal modular timbering is applied at fulfilment of the most difficult opalubochnyih works. In the same boards it is possible to concrete: The bases; Walls with direct, sharp, stupid corners and rounded off in the plan; Columns of rectangular and square section of any size; liftovyie mines and wells; Overlappings.At the expense of installation of locks with step of...
High-quality kamneschebyonochnaya production from Joint-Stock Company "Kirovogradgranit"
Four perspective granite open-cast mines in Ukraine - Pomoshnjansky, Novgorodkovsky, Novopavlovsky and Kapustinsky which develop more than 400 thousand tons of ores a month, belong to Joint-Stock Company "Kirovogradgranit", extending by means of rail transportation rubble of high quality. This rubble is recognised by standards DSTU Century 2. Corresponding costs the CAR, considering as a sending place sets EX the nearest...
Otdelochnyiy a heater «Fombord 5000»
The new finishing heater from ekstrudirovannogo (made foam) expanded polystyrene FOMBORD 5000 — its physical properties, technical characteristics and scopes is considered.In the market teploizolyatsionnyih roofing materials there was a new finishing heater. Experts have evaluated for a long time advantages ekstrudirovannogo expanded polystyrene, in particular, PENOPLEKSA. FOMBORD 5000 also it is intended for obschestroitelnyih and for internal works.Let's resut...
Steklovata
Question:«Hello. To us advise to apply glass wool to a thermal protection of walls of our house. However us interests — how much it is a safe and effective material? From what in general it make?»Agorkov E. S, MoscowGLASS WOOLGlass cotton wool — this material represents a mineral fibre which on technology of reception and properties has much in common...