Asphalt concrete mix
The invention relates to the field of road construction materials. Effect: reduction of consumption of bitumen and increase tyre grip wheels vehicle with the road surface. Asphalt mixture comprises a bitumen, a mineral filler in the form of fractions of gravel 5-10 and 10-20 mm cubic form schebenok sand with particles of cubic forms faction 0,315-5 mm, as a mineral powder is the fraction of the crushing of gravel 0-0,315 mm and additionally activated mineral powder in the following mass ratios, wt.%: bitumen 3,94-4,13; fractions of crushed rock with cubic shape schebenok 5-10 mm 21,3-32,0, fractions 10-20 mm 32,0-51,80; the fraction of sand with particles of cubic shape 0,315-5.0 mm 13,5-29,7; the fraction of the crushing of gravel 0-0,315 mm 0,86-1,96; activated mineral powder 3,84-7,73. 6 table. The invention relates to the field of road construction materials can be used for construction of road and airfield pavements.Famous mix asphalt, including asphalt binder, lime, mineral powder, gravel fractions of 3-15 mm and sand when the mass ratio of components, %: tar 5-5,5, slaked lime 1-2, minm binder consumption (tar) and mineral powder, which significantly increases the cost of the produced asphalt. In addition, the asphalt coating on the basis of these materials is characterized by a low coefficient of adhesion of the tires of cars with the surface and this increases the likelihood of accidents on the roads.Known asphalt mixture containing, wt.%: asphalt binder (tar oil - 8-9%), the spent etching solution files 0,8-1,9, mineral filler (granite screenings fraction up to 5 mm) rest /2/.The disadvantage of this method is associated with high consumption of oil bitumen (tar) - up to 9%. In addition, the solution from the etching of the files contains up to 29% hydrochloric acid and various chlorides, which increases the probability of formation of acid drainage from the road surface.The proposed asphalt mixture containing the bitumen BND 90/130 (6.3 to 8.5 wt.%), mineral filler (limestone grits, particles less than 5 mm 75,5 of 91.7 wt.%), activated mineral powder 2-16 wt.% /3/.The disadvantage of this method of producing asphalt concrete is the high consumption of bitumen (up to 8.5 wt.%).Known asphalt mixture /4/, which contains, wt%: bitumen 5-6, slag mineral powder 3-7,5, and mineral on the tuma (up 6%).The proposed asphalt mixture /5/ adopted us for the prototype. It includes bitumen, crushed stone fractions, mm: 5-10, 10-20 cubic form separate schebenok the sand fraction 0,315-5.0 mm and mineral powder fraction 0-0,315 mmThe disadvantages of the known asphalt mix are the high consumption of bitumen and low-grip tires wheels cars from the road surface. This is because in the prototype /5/ use fractions of crushed stone with cubic form separate schebenok and sand, no particles of cubic form. It is not possible to create a dense packing of gravel and mineral filler (sand) road construction, resulting in increased consumption of bitumen for void filling.The objective of the proposed technical solution is the reduction of consumption (bitumen) and the increase of the coefficient of adhesion of the tires of the wheels of the vehicles with the road surface.This problem is solved due to the fact that asphalt mixture containing bitumen, a mineral filler in the form of fractions of gravel 5-10 and 10-20 mm cubic form separate schebenok the sand fraction 0,315-5 mm, mineral powder fraction 0-0,315 mm, contains crushed rock with cubic shape schebenok sand with chemicalelement mineral powder in the following mass ratios of the components, wt.%:Bitumen 3,94-4,13Fractions of crushed rock with cubic shapeschebenok mm5-10 21,30-32,0010-20 32,0-51,80The fraction of sand with particles of cubic shape, mm0,315-5,0 13,50-29,70The fraction of the crushing gravel, mm0-0,315 0,86-1,96Activated mineral powder 3,84-7,73As a binder used bitumen grade BND 60/90 in the number of 3.94-4,13 wt.%At the present time upon receipt of asphalt mixes usually use crushed rock with cubic shape individual schebenok /5/ and the sand plate (flakiness), needle-shaped and sharp-angled forms, which, on the one hand, significantly increases the consumption of bitumen for the production of asphalt concrete (due to its loose packing), and on the other reduces the friction of the tires of the vehicle with the road surface, since the surface of contact of the tires with insufficient surface due to the absence of her micro - and macrosegregation layers, providing high traction tires and wheels with mikroteksturoy cover /6/.To increase the grip of the tires of car wheels with the road surface it is treated with special preparations, for example a mixture of sand with chlorides of alkali and alkaline earth metals and phosphogypsum /7 the AI pavement.To reduce consumption of bitumen in obtaining asphalt, increase of friction of the road with the tires of the wheels of the vehicle and lowering the operating costs of the road and the probability of emergency situations at us it is proposed to use as mineral filler in the composition of the asphalt concrete crushed stone fractions 5-10 and 10-20 mm cubic form schebenok and sand 0,315-5.0 mm with particles of cubic form.The use of fractions of crushed rock with cubic shape schebenok and sand with particles of cubic forms under certain mass ratios and their fractions allows to achieve a more dense packing (packing) mineral fillers of the road surface and to reduce the consumption of bitumen, to increase macro - and microroughness layers of wear of the road surface and the tyre grip of the wheels to the surface.The quality of asphalt is determined by the mass ratio of the fractions of gravel 5-10 and 10-20 mm cubic form schebenok and sand 0,315-5.0 mm with particles of cubic form.Reducing the amount of sand fractions 0,315-5.0 mm in a mixture of at least 13.5 wt.% it is undesirable, since it increases the consumption of bitumen for the preparation of asphalt concrete. The increase in the number of the population tyre wheel cars with the road surface.A decrease of the fraction of gravel 5-10 mm in the mixture below 21.3 wt.% reduces the density of the paving and increases the flow of bitumen, and increasing the amount of this fraction more of 32.0 wt.% also leads to an increase in consumption of bitumen due to a less dense packing of mineral filler in asphalt. With a fraction of crushed stone fractions 10-20 mm in the mixture below 32,0 wt.% increased consumption of bitumen and decreases the friction of the tires of car wheels with the road surface. When the number of crushed stone fractions 10-20 mm cubic form schebenok in the above mixture of 51.0 wt.% increased consumption of bitumen upon receipt of the asphalt.In the examples to obtain asphalt mixes used different numbers of fractions of gravel 5-10 and 10-20 mm cubic form schebenok and sand 0,315-5.0 mm with particles of cubic form.Fractions 5-10 and 10-20 mm cubic form schebenok and sand fractions 0,315-5.0 mm with cube-shaped particles made from materials Berezovsky career JSC "Taro" and Nizhny-Tagil pit administration "Valerin Bor on crushing the centrifugal type crushing and held their dust.Grain composition of fractions 5-10 and 10-20 mm cubic form schebenok and sand fractie crushing and screening, used in a mixture in the amount of 0,86 is 1.96 wt.% with the aim of obtaining a dense asphalt concrete and some reduction of consumption of bitumen. The grain composition of the fractions of screenings from crushing gravel 0-0,315 mm are given in table 4.As the activated mineral powder used powdered activated limestone Bogdanowitsch field. The Sverdlovsk region. Characterization of activated mineral powder are shown in table 5. Its consumption in the mixture is 3.84-7,73 wt.% The addition of active mineral powder improves the adhesion of bitumen to the mineral filler, the density and order packaging asphalt concrete pavement.On the above mineral fillers prepare five asphalt mixtures, the composition and properties of which are listed in table 6. Table 6 shows that the physico-chemical properties of the asphalt of the proposed structure meets the requirements of TU 218 of the RSFSR 601-88 on asphalt concrete pavement type EP, SP and MP, and the grip of the tyres of the car wheels and the road surface exceeds the value of coupling in analog /4/ and THAT 218 of the RSFSR 601-88 for grades SP and MP. The cost of production of asphalt concrete according to the proposed method significantly lower the index of the grip of the tyres of the wheels with the surface of the coating reduces the likelihood of accidents on the roads.Literature1. Auth. mon. The USSR №885391, E 01 7/18, published. 30.11.1981.2. Auth. mon. The USSR №1551693, published. 23.03.1990.3. Auth. mon. THE USSR №1248966, 04 26/26, 04 18/12, BI NO. 29, 1986.4. Auth. mon. The USSR №1204601. 04 IN 26/26, 18/14, 08 L 95/00, BI NO. 2, 1986.5. Rublev I. A. Asphalt concrete, M.: Higher school, 1969, 398 S., S. 13-17.6. Panina L., Theoretical aspects of surface coatings. Sat. the scientific. proceedings of the OPS of the Russian state road research Institute. M., 1992, vol.5, S. 50-56.7. Auth. mon. The USSR №1498780, M CL409 K 3/18, BI NO. 29, 1989.8. Auth. mon. The USSR №779490, E 01 7/32 STRANDED, BI No. 42, S. 157.
ClaimsMix asphalt, including asphalt, mineral filler in the form of fractions of gravel 5-10 and 10-20 mm cubic form separate schebenok the sand fraction 0,315-5 mm, mineral powder fraction 0-0,315 mm, characterized in that it contains crushed rock with cubic shape schebenok sand with particles of cubic form, as a powder mineral - fraction of the crushing of rubble and additionally activated mineral powder in the following mass ratios, wt.%:Bitumen 3,94-4,13Fractions of crushed rock with cubic shape schebenok mm:5-10 21,3-32,010-20 32,0-51,8The fraction of sand with particles of cubic shape mm:0,315-5,0 13,5-29,7
FIELD: building industry, road building.
SUBSTANCE: invention proposes a binding agent for asphalt-concrete mixtures comprising a modifying agent as an organic binding agent and a filling agent. Agent comprises polyethylene and/or polystyrene waste ground to size 2-5 mm as a modifying agent, and highly dispersed carbonate or oxide powder as a filling agent and sulfur additionally wherein components are taken in the following ratio, wt.-%: bitumen, 30-75; indicated powder, 3-19; polyethylene and/or polystyrene waste, 1-2; sulfur, 20-50. Invention can be used for making road and sidewalk covers, building platforms, industrial object floors and waterproofing materials. Invention provides enhancing strength, waterproofing and reducing water saturation of asphalt-concrete.
EFFECT: improved properties of binding agent.
SUBSTANCE: activated mineral powder comprises mineral agent made of carbonate rocks and mixture of oil bitumen and surface-active substances that are composed of a mixture of raw tall oil, distillated tall oil, tall pitch at mass ratio 1:(0.4-0.66):(0.6-1.66) and slate oil or residue pyrolysis wood resin that constitutes 0-50 mass percents of the mixture. The powder is composed of, mass %, 97-99.5 of mineral agent and 0.5-3 of mixture of oil bitumen and surface active substances, the mass ratio of bitumen to surface-active substances ranging from 1:0.5 to 1:3.1.
EFFECT: improved physico-mechanical characteristics of asphalt-concrete.
1 cl, 5 ex, 1 tbl
FIELD: road-transport industry.
SUBSTANCE: method includes applying substance on asphalt-concrete mixture. As substance silicon-organic modifier is used, loss of which at 1 m2 of area of pre-placed on road asphalt-concrete mixture at temperature 80-100°C is no less than 0,3-0,5 kg. After applying modifier, asphalt-concrete mixture is rolled.
EFFECT: higher efficiency, no corrosive effect on metals, effective at temperature above -20°C.
2 cl, 3 tbl, 3 ex, 1 dwg
FIELD: manufacture of road-building materials.
SUBSTANCE: method is characterized by addition of wood fibers to mix, said fibers being obtained from wood crumb by drying it in ascending air flow at 120°C followed by breaking-down on mill with cribble-like blades. Prior to be charged into mixer, wood fibers are forced through dies with the aid of ventilator and, for their mixing, a mineral powder, bitumen, and a surfactant are first added into mixer, then stirred, and, in the course of stirring, wood fibers in common with broken stone and sand are charged into mixer.
EFFECT: reduced expenses on powder of mixes and improved their performance characteristics: compression strength and water resistance.
1 dwg, 1 tbl, 3 ex
FIELD: highway engineering, in particular paving upper layers building in all climatic regions.
SUBSTANCE: claimed bituminous concrete composition contains (mass %): lime chip of 5-20 mm fraction 35-45; petroleum viscous bitumen 5.0-5.5; mineral powder from dolomite or lime rocks 3-8; polymer additive 0.1-0.25 based on bitumen mass and balance: sand of 5 mm or less fraction. As said polymer additive polyethylene terephthalate in form of secondary plastic bottles is used.
EFFECT: bituminous concrete with improved structure-forming characteristics and increased water and heat resistance.
1 cl, 4 tbl, 1 ex
FIELD: motor road building and refreshment, in particular production of pavement coarse layers.
SUBSTANCE: claimed mixture contains (mass %): chipping of at most 15 mm grade 65-75; chipping breakage screening of 0-5 mm grade 17.0-23.5; mineral powder 3.0-5.0; bitumen 4.4-5.5; polymeric reinforcing additive 0.4-0.6; and black oil as plasticizer 0.2-0.5. Abovementioned polymeric reinforcing additive represents waste from pipeline waterproofing, namely waste from two layered waterproofing band of shrinkage material containing layer of adhesively active composition of melt adhesive based on polyethylene/vinyl acetate copolymer and layer of irradiation radiation cross-linked polyethylene irradiated with electron beam and coated with hot melt adhesive.
EFFECT: mixture of increased resistance, water resistance, and decreased swelling limit.
1 cl, 5 tbl, 1 ex
FIELD: road building materials.
SUBSTANCE: bitumen of specified brands is subjected to post-oxidation using air blowing at 200-230°C to achieve desired binder softening temperature, after which 12-15% solution of butadiene/styrene or butadiene synthetic rubber in mixture of kerosene and mazut at ratio (0.3-0.4):(0.7-0.6) is added to post-oxidized bitumen at 180-190°C and oxidation is then continued at the same temperature until desired brand of binding agent is obtained.
EFFECT: simplified technology, improved environmental condition, and improved physicochemical characteristics of product.
2 cl, 1 tbl
FIELD: construction of motor car roads.
SUBSTANCE: the invention is pertaining to construction of motor car roads and may be used for the construction of the upper layers of the highway coatings. The technical result of the invention is production of a stabilizing additive in the granular form capable to reduce not only disintegration a macadam-mastic asphalt-concrete mixtures, but also to increase their strength at 50°C (i.e. to improve their heat resistance),the factor of their durable water saturation and a adhesion power of the binder to the mineral materials. The polymeric-reinforcing granular stabilizer for macadam-mastic asphalt-concrete includes the bitumen and the polyamide fibers. At that in the capacity of the polymeric-reinforcing additive it contains the wastes of the pipeline hydro-insulation of ArmPEVA type representing the waste of the bilayered belt of a shrinking material used for insulation of pipes and consisting of a layer of the adhesive active composition of a glue-melt on the basis of an copolymer of ethylene with a vinyl acetate and a layer of the radiation-cross-linked polyethylene treated with electrons and with applied on it of the hot-melt adhesive, and in the capacity of an adhesive use surface-active substance of a cationic type - KADEM_BT, representing the cationic reactant made out of acids of vegetable or animal origin of the fraction of C16-C20 and a polyethylene polyamine at the following components ratio(in mass %): bitumen BND 60/90 - 28.0-38.0, a polyamide fiber - 31.0-35.0, the indicated polymeric-reinforcing additive - 30.0-35.0, the indicated surface-active substance - 1.0-2.0.
EFFECT: the invention ensures production of a stabilizing additive in the granular form capable to reduce not only disintegration a macadam-mastic asphalt-concrete mixtures, but also to increase their strength at 50°C.
1 cl, 1 ex, 6 tbl
FIELD: building industry; petrochemical industry; the process of production of the stabilizing agents for the macadam-mastic asphalt concrete.
SUBSTANCE: the invention is pertaining to the development of the process of production of the stabilizing agents for the macadam-mastic asphalt concretes used, in particular, at making the highways coatings made on the basis of the macadam-mastic asphalt. The technical result is development of the stabilizing additive for the asphalt concrete produced on the basis of the cheaper components and capable to sorb the binding in the asphalt concrete mixtures, in particular, in the macadam-mastic asphalt concretes at the technological temperatures during storage and transportation of the asphalt concrete mixture produced in the granulated form suitable for transportation and direct injection in the macadam-mastic asphalt concretes on the sites of its application. The stabilizing additive in the form of the granules for the macadam-mastic asphalt concretes contains the organic binding and the structure-forming agent. At that the organic binding is selected from the group including tar, bitumen or bitumen emulsion and in the capacity of the structure-forming agent use the basement lint and-or the lint representing the waste of the cotton production at the following ratio of components in the composition (in mass %): the indicated waste - 60-90, the organic binding - the rest up to 100 %.
EFFECT: the invention ensures production of the stabilizing additive based on the cheaper components and capable to sorb the binding in the macadam-mastic asphalt concretes at the technological temperatures during storage and transportation.
2 cl, 2 tbl
FIELD: building industry; methods of production of the stabilizing additives for the macadam-mastic asphalt-concrete mixtures.
SUBSTANCE: the invention is pertaining to the field of building industry, in particular, to the method of production of the stabilizing additive for the macadam-mastic asphalt-concrete mixture. The technical result: the invention ensures the optimum temperatures and the time of laying, increased efficiency of the macadam-mastic asphalt-concrete mixture laying and compaction due to improvement of the quality of the stabilizing additive. The method of production of the stabilizing additive used for the macadam-mastic asphalt-concrete mixture production provides for usage of the substance with the fibrous structure and its granulation. At that in the capacity of the substance with the fibrous structure use the fibrous hydrosilicate of magnesium; before the granulation it is mixed with water, and after the granulation the granules are structurized on the vibrating inclined tray at the vibration amplitude of 24-26 mm high and at the vibration frequency of 230-250 per a minute with the subsequent drying.
EFFECT: the invention ensures the macadam-mastic asphalt-concrete mixture optimum temperatures and the time of laying, increased efficiency of the mixture laying and compaction due to improvement of the quality of the stabilizing additive.
3 cl, 1 tbl, 1 dwg