61results about How to "Reduce rutting" patented technology

The invention discloses a modifier of pitch for road and water-proofing material, which comprises the following steps: allocating with mass percent as 20-30% polypropylene, 3-10% epoxide resin, 8-10% polyethylene, 8-10% geoceric acid and 40-60% ethylene distearamide; mixing; stirring for 10-15 min; getting the product. This product possesses good stability and predominant water resistance, which can be fit for all of asphalt.

The invention discloses a basalt fiber and carbon fiber compound geogrid with electric heating function, which is formed by compounding materials of basalt fiber, carbon fiber beams, modified asphalt, polyacrylic emulsion or high temperature resistant heat convertible resin and the like. The geogrid not only has the function of reinforcement, but also has the functional characteristic of electric heating effect, has simple construction, low manufacture cost, convenient construction, safety and reliability, and is mainly used for melting snow and ice on the concrete pavement and the airfield runway.

The invention provides a modified asphalt composition and a preparation method thereof. The modified asphalt composition comprises, by weight, 87.5% to 98.9% of base asphalt, 1% to 10% of a modifier and 0.1% to 2.5% of a gelatinizing agent (a structure improver). The preparation method comprises the following steps: uniformly dispersing the modifier into the base asphalt at a temperature of 150 to 260 DEG C by using equipment like an ordinary agitator, a high speed shearing machine or a colloid mill to prepare the modified asphalt composition; and adding the gelatinizing agent to allow a sol-gel type colloid structure of asphalt to be converted into a gel type colloid structure and to allow a stable colloid structure of asphalt to be formed. According to the invention, the preparation method for the modified asphalt composition is simple; and the prepared modified asphalt composition has a high softening point, high viscosity, a high penetration index, excellent high and low temperature performance, excellent ageing resistance, small temperature sensitivity and the like, can reduce occurrence of damages like tracks and upheaval on a pavement and prolong a maintenance period of the pavement and is applicable to construction of high-grade highways.

The invention discloses a determining method suitable for the mix proportion of asphalt mixture of heavy traffic road surfaces. The determining method comprises the following steps of preparing raw materials, using a coarse aggregate dry tamping VCA testing method to determine the mass relative proportion of coarse aggregate in the asphalt mixture, using a Marshall tamping testing method to determine the content of coarse aggregate and the content of fine aggregate in the asphalt mixture, and using the tightest framework embedding and extruding state to determine the optimal asphalt-aggregate ratio of the asphalt mixture. Compared with general asphalt mixture, the compactness of the asphalt mixture manufactured in the determining method is improved obviously, the water seepage situation of the road surfaces can be effectively reduced, and water breakage of the road surfaces is reduced. Furthermore, the asphalt mixture has better high temperature resistance, and harm of tracks, bleeding and the like are reduced. Meanwhile, the using amount of asphalt is reduced, engineering investment cost is obviously reduced, and positive effects are brought to wider application of asphalt road surfaces inland.

The invention provides a composite fabricated cement concrete pavement structure. The composite fabricated cement concrete pavement structure comprises a base layer, a leveling layer laid on the baselayer, a fabricated prefabricated concrete slab laid on the leveling layer, a rubber modified asphalt synchronous gravel sealing layer laid on the fabricated prefabricated concrete slab, and rubber modified asphalt concrete laid on the rubber modified asphalt synchronous gravel sealing layer. Compared with the prior art, the composite fabricated cement concrete pavement structure is formed by combining specific functional layers under specific connection relationship, the functional layers have good interaction, and the cooperation of layer structures is realized, so that the whole composite fabricated cement concrete pavement structure has high strength and good driving comfort, and reflective cracks and rutting can be reduced, and the service life of the pavement is prolonged. The experimental results show that the pavement damage index PCI of the composite fabricated cement concrete pavement structure is 92.3-95.5, and the pavement service condition is excellent.

The invention provides modified asphalt, the modified asphalt comprises the following raw materials: a matrix asphalt, waste powdered carbon obtained from a printer or a copy, aluminic acid ester and stearic acid; a preparation method of the modified asphalt comprises the following steps: 1)respectively preheating the matrix asphalt and the waste powdered carbon; 2)mixing the preheated waste powdered carbon and the matrix asphalt to obtain a mixture; 3)simultaneously stirring or shearing the mixture while heating; 4)adding an aluminic acid ester coupling agent and continuously stirring or shearing; and 5)adding a stearic acid synergist and stirring or shearing to obtain the modified asphalt. The modified asphalt has the advantages of good technology performance and low price, the waste powdered carbon in a toner cartridge of the printer or a copy machine can be reused, the modified asphalt has good social, economic and environmental protection benefits; the softening point of the matrix asphalt can be increased by 3-8 DEG C, so that the high temperature stabilization performance of the asphalt mixture can be increased, pavement track is reduced, water stabilization performance is increased, and the low temperature performance grade of the modified asphalt can be kept or improved.

The invention belongs to the field of asphalt concrete pavements and relates to a composite asphalt cooling pavement top layer and a construction method thereof. The construction method comprises following steps: S1, a thermal-resistant asphalt mixture is spread on the top layer of a pavement and then rolled; S2, after the thermal-resistant asphalt mixture rolled in S1 is cured, the upper surface of the thermal-resistant asphalt mixture is coated with a coating; S3, after the thermal-resistant asphalt mixture and the coating are cured, the composite asphalt cooling pavement top layer is formed. Pavement ruts, the urban heat island effect and permafrost subgrade defects can be overcome.

The invention discloses an emulsified asphalt-cement stabilized porcelain granule base course material which eliminates waste and has good performance. Porcelain granules are utilized to substitute broken stones to prepare the base course material, the base course material mainly comprises cement, emulsified asphalt, the porcelain granules, stone chips and water, and further the porcelain granules are sintered porcelain granules produced by pelleting and roasting the waste. The base course material reduces rigidity, contributes to the reduction of ruts and reflective cracks on a road surface, improves the structural performance of the road surface, and has good impermeability, antifreezing performance and durability as well as convenient construction. The invention also provides a construction method for the emulsified asphalt-cement stabilized porcelain granule base course.

The invention discloses a water permeable asphalt road surface and a construction method thereof. The water permeable asphalt road surface comprises an asphalt road surface body, and the asphalt road surface body comprises an earth base, a cushion layer, a base layer and a face layer which are sequentially laid on the ground surface from bottom to top, a water insulation layer is arranged on the cushion layer, so that the water entering the interior of the asphalt road surface body is drained horizontally along the water insulation layer; a drainage ditch for collecting water is formed in one side of the earth base; a plurality of watering pipes which are connected with surrounding green belts are arranged in the drainage ditch; and water guiding pipes are arranged in the drainage ditch, and the water guiding pipes are connected to the gutter inlet. According to the water permeable asphalt road surface and the construction method thereof, water accumulating on the road surface is dispersed quickly, and the crack resistant ability of the road surface is improved by fully utilizing original discarded road surface materials, and the service life of road is prolonged.

The invention discloses an asphalt pavement cooling device, which comprises two main parts, i.e. an evaporation pipe section and a condensation pipe section. The condensation pipe section includes a condensation pipe outer pipe and a condensation pipe inner pipe, and the evaporation pipe section includes an evaporation pipe main pipe and evaporation pipe branch pipes. When the pavement temperature is higher than the air temperature, a working medium filling the device undergoes gas-liquid circulation spontaneously so as to dissipate the pavement heat into the air and reduce asphalt pavement rutting, flushing, translation and other diseases caused by temperature rise. Single condensation pipe is connected to a plurality of evaporation pipes, the cooling area of single condensation pipe is increased, and the cooling efficiency is greatly improved. Also, the condensation pipe can be combined with street lamps, advertising boards and other road affiliated facilities into a whole, thus having no influence to the appearance.

The invention discloses an anti-track bituminous pavement cooling structure and a material composition of each layer thereof. The anti-track bituminous pavement cooling structure comprises a low-heatconduction upper face layer, a heat storage intermediate face layer and a high-heat-conduction lower face layer from top to bottom. During construction, layered paving and rolling are combined, and tack coat is scattered between the layers. According to the anti-track bituminous pavement cooling structure, a pavement structure actively carries out temperature control on a bituminous pavement, andpavement tracks are reduced by reducing the temperature of the intermediate face layer and the lower face layer of the bituminous pavement. According to the anti-track bituminous pavement cooling structure, the bituminous pavement structure with the low-heat conduction upper face layer, the heat storage intermediate face layer and the high-heat-conduction lower face layer is adopted, the pavementtemperature is reduced to the maximum degree through heat induction and phase change heat storage, and the cooling effect is remarkable. According to the anti-track bituminous pavement cooling structure, heat insulation fibers are added to the material of the low-heat conduction upper face layer, the high-temperature performance of a mixture can be improved while the heat conduction performance ofthe pavement, and the anti-track capacity of the upper face layer is improved.

The invention discloses a reflection crack repairing structure and a reflection crack repairing process. The reflection crack repairing structure comprises a waterproof adhesive layer, a fiberglass-polyester paving mat anti-crack layer, a first backfill layer and a second backfill layer, wherein the waterproof adhesive layer is arranged on a grooved bottom surface of a reflection crack; the fiberglass-polyester paving mat anti-crack layer is arranged on the upper surface of the waterproof adhesive layer; the first backfill layer is arranged on the upper surface of the fiberglass-polyester paving mat anti-crack layer; and the second backfill layer is arranged on the upper surface of the first backfill layer. By milling materials around the crack and backfilling the fiberglass-polyester paving mat anti-crack layer and backfill, the reflection crack repairing structure disclosed by the invention has favorable integrity, continuity and durability. When the reflection crack repairing structure is applied to a pavement structure, the reflection crack repairing structure has the functions of isolation, seepage prevention, filtration, drainage and the like, can improve the resistance to fatigue cracking of an asphalt surface course, can prevent the reflection crack and deformation resistance, and can improve the use quality of a semi-rigid base asphalt pavement with obviously insufficient old road intensity, large traffic flow, frequent heavy overload vehicles and severe cracking, thereby prolonging the service life of the pavement structure.

A soilbag roadbed and a method. The soilbag roadbed comprises soilbags, a roadbed substrate, a soilbag roadbed, a pavement and a surface protection. Soilbags are staggered vertically and horizontally and stacked up layer by layer from the roadbed substrate to be tightly combined with asphalt, concrete or broken stone paved on the pavement. The invention is simple, practical, thrift and economical and has substantial social and economic benefits.

A waterproof asphalt pavement structure comprises an asphalt wearing surface layer, an asphalt middle-lower surface layer, a roadbed surface layer and a roadbed; a waterproof adhesive layer is arranged between the asphalt wearing surface layer and the asphalt middle-lower surface layer; a waterproof permeable sealing layer is arranged between the asphalt middle-lower surface layer and the roadbed surface layer; a drainage pipe is arranged in the roadbed surface layer, and drainage holes are formed in the circumference of the drainage pipe; and one side of the road width direction is provided with a drainage ditch, the lower side of the drainage ditch extends to the roadbed, and the side, close to the drainage ditch, of the drainage pipe is communicated with the drainage ditch. The construction method comprises the following steps: firstly, building a roadbed, then paving the roadbed surface layer on the roadbed, burying the drainage pipe in the paving process of the roadbed surface layer, cleaning waste materials in the drainage pipe, and then paving the asphalt middle-lower surface layer and the permeable sealing layer; then uniformly spraying the waterproof adhesive layer on the asphalt middle-lower surface layer, and after demulsification and evaporation of emulsified asphalt are completed, paving the asphalt wearing surface layer and properly rolling; and building the drainage ditch at a reserved position on one side of the road surface in the width direction, and enabling the drainage pipe to be communicated with the drainage ditch.

The invention discloses a lightweight heat-insulating semi-flexible anti-cracking pavement which comprises large-gap asphalt concrete and foaming cement glue filled in gaps of the large-gap asphalt concrete, wherein the macropore asphalt concrete is prepared from aggregate, filler and high-viscosity modified asphalt as main raw materials, and the high-viscosity modified asphalt is prepared by adding high-viscosity modified anti-crack particles into SBS modified asphalt or matrix asphalt for modification; the foamed cement mucilage is prepared from cement, quick lime, fly ash, gypsum, carboxylated styrene-butadiene emulsion, sodium sulfate, sodium polyacrylate, aluminum powder paste and water as raw materials. The lightweight flexible pavement has the advantages of light self-weight, good thermal insulation performance, high interface bonding performance and the like, can effectively reduce the low-temperature cracking property of the pavement, is suitable for middle and upper surface layers of the pavement, solves the problems of easy surface cracking and fatigue aging of the existing semi-flexible pavement, prolongs the service life of the pavement, and is suitable for popularization and application.

The invention provides a surface layer structure of a bus lane and a paving method, and relates to the technical field of road surface pavement. Diseases such as wheel rut, pushing upheaval, cracks and pit slots of general asphalt concrete pavement can be solved. The surface layer structure of the bus lane comprises a general road segment and a platform road segment, and a layer surface structureof the general road segment and the platform road segment sequentially comprises a cement concrete layer, a bonding layer and an asphalt concrete thin layer from bottom to top; the bonding layer of the general road segment is an asphalt bonding layer, and the bonding layer of the platform road segment is a polyurethane bonding layer or an epoxy resin bonding layer; the thickness of the cement concrete layer is not less than 20cm; the thicknesses of the polyurethane bonding layer and the epoxy resin bonding layer are not less than 3mm; and the thickness of the asphalt concrete thin layer is 1.5cm-2.5cm. The technical scheme of the surface layer structure of the bus lane and the paving method is suitable for the process of bus lane road pavement.

The invention discloses an asphalt pavement structure comprising an asphalt surface layer which comprises a lower layer, an intermediate layer, a drainage insulation layer and an upper layer arranged in order from bottom to top, wherein the drainage insulation layer is an asphalt mixture layer with a porosity of 8% to 20%. The asphalt pavement structure disclosed by the invention has the functions of drainage and temperature control, and has the advantages of reducing water damage and ruts of asphalt pavements.

The invention provides a rut preventing device and method for the long uphill section of an asphalt pavement. The rut preventing device comprises a central control unit, a pavement temperature acquiring system, an automatic spraying system and a running safety warning system, wherein the central control unit analyzes and judges the received real-time temperature data and the received real-time traffic information, and controls the automatic spraying system and the running safety warning system to work; besides, the central control unit transmits the working state of the systems to a server in a remote manner through a 3G wireless transmission module; besides, the central control unit receives commands from the server. The rut preventing method disclosed by the invention is simple, rapid and highly efficient, and is low in cost; both of running safety and pavement maintenance are taken into consideration; the temperature of the asphalt pavement can be effectively lowered, so that the generation of ruts on the asphalt pavement can be effectively relieved, and the running safety and running comfort on the asphalt pavement under high-temperature conditions in summer are improved.

The invention belongs to the technical field of engineering materials, and particularly relates to a nano-composite natural rock modified asphalt mixture additive. The additive is prepared from natural rock asphalt as a main raw material and waste tire rubber powder, a polymer, nano-diatomite, lignin fibers, nano-zinc oxide and other raw materials as auxiliary materials, so the elasticity, adhesiveness and rigidity of an asphalt mixture are effectively improved, and the high-temperature deformation resistance, the low-temperature crack resistance and the water damage resistance of the compound rock modified asphalt mixture are remarkably improved.

The invention provides a shape memory epoxy resin modified asphalt mixture and a preparation method thereof. The preparation method comprises the following steps: taking 4-6 parts of asphalt, 100 parts of aggregate, 1-20 parts of shape memory epoxy resin and 1-6 parts of mineral powder according to parts by mass; mixing the aggregate and the shape memory epoxy resin, and then blending uniformly atthe temperature of 140 DEG C to 180 DEG C to obtain a blending mixture a; mixing the asphalt and the blending mixture a, and then blending uniformly at the temperature of 140 DEG C to 180 DEG C to obtain a mixing mixture b; and mixing the mineral powder and the blending mixture b, then blending uniformly at the temperature of 140 DEG C-180 DEG C, cooling to a room temperature, and thus obtainingthe shape memory epoxy resin modified asphalt mixture. The shape memory epoxy resin modified asphalt mixture has an excellent pavement performance and a remarkable improvement effect on the deformation recovery performance of the asphalt mixture; and the preparation method is simple in operation and low in cost and has low requirements on equipment and the characteristics of environmental protection.