182 results about "Wearing course" patented technology

Provided is a temperature-adjusted and modified recycled ASCON composition for reusing 100% of waste ASCON for road pavement, and a method for manufacturing same, wherein the composition is used in asphalt pavement as a material for the wearing course, surface course, binder course, and base course, and the method comprises: feeding 100 wt % of waste ASCON aggregate having up to a 53 mm particle size distribution into a mixer via a feeding inlet for new aggregate; adding 0.1 to 20 wt % of a recycling modifier and 0.1 to 20 wt % of a temperature-adjusting additive to the waste ASCON via the feeding via the inlet for new aggregate; and homogeneously mixing said materials at 5 to 180 DEG C for 0.5 to 3 minutes. The recycling modifier improves the physical properties of recycled ASCON, while the temperature-adjusting additive adjusts the temperatures for producing and constructing recycled ASCON. The present invention may provide economic, social and technological conveniences by improving the overall recycling technology of waste ASCON. The conveniences may be achieved by virtue of: cost-saving in production by using only waste ASCON without any new materials; saving waste disposal costs; preventing the destruction of nature to obtain aggregate; reducing the consumption of new asphalt; preventing environmental pollution through the reuse of waste products; preventing the early occurrence of plastic deformation and fatigue cracks due to improving the quality of the recycling modifier; economic benefits from the prolonged lifespan of road pavement; the possibility of being used as a material for the wearing course and surface course of major roadways; saving energy in the production and construction of recycled ASCON by adding the temperature-adjusting additive; and reducing greenhouse gas emissions.

The invention belongs to the technical field of a building material used in road engineering, and specifically relates to drainage asphalt mixture for an ultra-thin wearing layer. The mixture comprises aggregated material, stuffing, high-performance asphalt and warm mixing additive; the maximal nominal size of the mixture is 6.7mm; the thickness of a pavement layer is 10-20mm; the aggregated material is basalt or dolerite; the used stuffing is mixture of limestone powder and common silicate cement, and the used high-performance asphalt is prepared from general modified asphalt by adding waste tire rubber powder which is 20-28% of weight of the asphalt and modifying. An ultra-thin finishing coat and low-temperature construction are realized by the asphalt mixture by adding the warm mixing additive; the ultra-thin wearing layer has the advantages of low construction cost, convenience in construction and the like, and is suitable for building of an asphalt concrete pavement and function-improving works of the pavement.

The invention relates to SBS (styrene butadiene styrene)/SBR (styrene butadiene rubber) composite modified emulsified asphalt. The SBS/SBR composite modified emulsified asphalt consists of matrix asphalt, linear SBS which accounts for 3.5%-5.5% of the weight of the matrix asphalt, compatilizer which accounts for 1%-4% of the weight of the matrix asphalt, stabilizer which accounts for 0.1%-0.4% of the weight of the matrix asphalt, viscosity reducer which accounts for 2.0%-10.0% of the weight of the matrix asphalt, emulsifier which accounts for 0.5%-1.5% of the weight of the matrix asphalt and SBS rubber latex which accounts for 1%-5% of the weight of the matrix asphalt. The SBS/SBR composite modified emulsified asphalt obtained in the invention has characteristics of being high in softening point, high in ductility, high in solid content and low in viscosity, achieves and is further higher than JTGF40-2004 product specification requirements of Ministry of Communications, and can be suitable for special high-grade bituminous pavements such as an ultrathin wearing layer, and the like as well as an associated construction process thereof.

The invention relates to an ultra-viscous seal coat on the bituminous pavement and a construction method thereof. The ultra-viscous seal coat comprises a high performance modified emulsified bitumen bonding layer and an ultra-viscous cold-mixed material wearing layer which is obtained by cold-mixing aggregates, cement, water, composite modified emulsified bitumen, a fiber and a liquid additive. According to the construction method of the seal coat, the ultra-viscous cold-mixed material wearing layer mixing and lying and the high performance modified emulsified bitumen sprinkling are synchronously carried out. The seal coat has the characteristics of ultra bonding, high water resistance, high sliding resistance, low noise, crack resistance, low carbon, energy saving and environmental protection.

The invention discloses a long-life pavement structure for a steel bridge deck and a pavement method of the pavement structure. The long-life pavement structure comprises an anti-corrosion layer, a lower adhesive layer, a lower gravel layer, a structural layer, an upper adhesive layer, an upper gravel layer and a wearing layer which are sequentially arranged on the steel bridge deck from bottom to top. The pavement structure has excellent antiskid and waterproof performances, low-temperature cracking resistance, high-temperature rutting resistance, fatigue resistance and water stability, is fine in deformation compatibility with a steel plate and wear-resistant, surface aggregates do not easily fall off, the pavement method of the pavement structure is high in mechanization degree and strong in feasibility, the paved steel bridge deck can be put into operation in a short time, only the wearing layer of the pavement structure is damaged, only regular surface milling and top facing repair are needed, the pavement structure does not need to be structurally reconstructed in a long service life period, maintenance is facilitated, maintenance cost is saved, and the pavement method conforms to the design concept of a long-life pavement and also conforms to the energy conservation and environmental protection concept of modern society.

The invention discloses colorful asphalt latex, a preparation method thereof and an application of the colorful asphalt latex in colorful slurry seal coat. A colorful asphalt cementing agent, an emulsifying agent, an additive and water are mixed and stirred according to certain ratio to prepare the colorful asphalt latex. The colorful asphalt latex, inert solid, a colorant and water are stirred to prepare colorful slurry mixture, and then paving construction is performed to prepare the colorful slurry seal coat. The colorful slurry seal coat has simple manufacturing technique, not only can be applied to the paving of a colorful slurry seal coat road surface but also is applied to the aspects such as the maintenance of an old asphalt road surface, the paving of a wearing coarse on the sand-gravel surface, and the maintenance of a cement concrete roadway and a bridge deck, reduces the cost of road maintenance, and increases the prior road friction coefficient; the striking color has good landscape and alarm function, high application value and high popularization value.

The invention discloses a method for designing a mix proportion of a bituminous mixture for an ultra-thin wearing course. The method comprises the following steps: step 1, selecting raw materials comprising bitumen and ore aggregate which comprises coarse aggregate, fine aggregate and filler; step 2, designing the mix proportion of the bituminous mixture for the ultra-thin wearing course; step 2a, determining grading; step 2b, determining the optimal bitumen-aggregate ratio; step 3, preparing the bituminous mixture for the ultra-thin wearing course according to the designed mix proportion of the bituminous mixture for the ultra-thin wearing course and inspecting whether the shearing resistance of the bituminous mixture meets the shearing resistance standard for roads. On the basis of shearing resistance for roads, a road surface destroy form is integrated into the design method, inspection of various properties and standards of the bituminous mixture for the ultra-thin wearing course in the process of designing of the mix proportion of the bituminous mixture for the ultra-thin wearing course is put forward, and the mix proportion of the bituminous mixture for the ultra-thin wearing course is designed reasonably on the basis.

The invention discloses a steel-ultra-high performance concrete combined bridge deck structure with a shearing resisting structure and a construction method thereof. The structure comprises a steel bridge deck layer and an ultra-high performance concrete layer, wherein a shearing-resisting reinforcing mesh structure is fixedly connected with the steel bridge deck layer; and the shearing-resisting reinforcing mesh structure is embedded in the ultra-high performance concrete layer. The construction method comprises the following steps of: firstly, erecting a steel beam so as to obtain the steel bridge deck layer; secondly, constructing and welding a reinforcing mesh, wherein the reinforcing mesh can adopt the mode that a lower longitudinal rib distributed layer is combined with an upper transverse rib distributed layer, or a mode that a lower transverse spacing rib distributed layer, a longitudinal rib distributed layer and the upper transverse rib distributed layer are combined, and longitudinal reinforcing ribs and transverse reinforcing ribs can be arranged among shearing-resisting longitudinal ribs and shearing-resisting transverse ribs; subsequently casting the ultra-high performance concrete layer so as to embed the shearing-resisting reinforcing mesh structure into the ultra-high performance concrete layer; and finally paving a wearing layer so as to accomplish the construction. The steel-ultra-high performance concrete combined bridge deck structure has the advantages of being small in building height, large in partial rigid, reliable in shearing-resisting connection between combined layers, good in fatigue resistance, convenient to construct and the like.

The invention relates to asphalt concrete for an ultra-thin wearing course with an easily-compactable skeleton and a thickness of 1 to 1.5 cm. The ultra-thin wearing course is characterized by comprising an upper asphalt concrete layer and a lower high-viscosity modified emulsified asphalt bonding layer, wherein the laying thickness of the upper asphalt concrete layer is 1.0 to 1.5 cm, and a proper spraying amount of the lower layer is 0.8 to 1.0 kg/m<2>. The mixture for the ultra-thin wearing course forms a skeleton-compact ultrathin pavement and enables the pavement to have good stability, durability and safety performance. The ultra-thin wearing course is applicable to prevention and maintenance of newly-built pavements and old pavements.

The invention discloses a paving structure of a heavy-duty traffic road based on a high stiffness modulus asphalt mixture and belongs to the technical field of road paving. The paving structure consists of an anti-wear layer, an anti-rutting deformation layer, an anti-fatigue layer and a semi-rigid base layer which are paved on a roadbed from top to bottom, wherein the anti-wear layer, the anti-rutting deformation layer and the anti-fatigue layer are high stiffness modulus asphalt mixture functional layers. Compared with the prior art, the paving structure disclosed by the invention solves the problem that a pavement structure of a conventional semi-rigid base layer asphalt pavement is damaged under the effect of heavy duty, has the characteristics of fatigue cracking resistance, permanent rutting deformation resistance, water damage resistance and the like, is low in life cycle cost, can be widely applied to heavy-duty traffic roads and has a high popularization and application value.

The invention relates to ultrathin wearing layer modified asphalt and a preparation method thereof. The ultrathin wearing layer modified asphalt is prepared from, by mass, 79.8%-91.6% of matrix asphalt, 3.0%-8.0% of a modifier SBS, 2.0%-4.0% of compatilizer, 0.1%-0.5% of a stabilizer, 2.0%-8.0% of a viscosity regulating agent and 0.3%-0.7% of an anti-aging agent. The preparation method of the ultrathin wear layer modified asphalt comprises the following steps that 1, the matrix asphalt is heated; 2, the modifier, the compatilizer and the anti-aging agent are added into the matrix asphalt simultaneously, and stirring is conducted at constant temperature; 3, a high-speed shearing machine is started, and shearing and dispersing are conducted; 4, the stabilizer is added, and stirring and developing are conducted; 5, the viscosity regulating agent is added, stirring continues, and then the ultrathin wearing layer modified asphalt can be prepared. The ultrathin wearing layer modified asphalt prepared through the method has the high 60-DEG-C viscosity (higher than 50,000 Pa.S) and the low 135-DEG-C viscosity (lower than 3.0 Pa.S).

The invention discloses an ice condensation resistant ultra-thin wearing course pavement and a preparation method thereof. The ice condensation resistant ultra-thin wearing course pavement is prepared from the following raw materials in parts by weight: 15-17 parts of 10-15 mm gravels, 14-16 parts of 5-10 mm gravels, 11-13 parts of stone chips of which the particle size is smaller than 3 mm, 3-5 parts of ice condensation resistant agents, 2.2-2.6 parts of modified asphalt, and 1.1-1.4 parts of polymer modified emulsified asphalt, wherein the content of sodium chloride in the ice condensation resistant agents is 50-60%, and the solid content of the polymer modified emulsified asphalt is greater than or equal to 65%. According to the invention, ice condensation resistant ultra-thin wearing courses are paved on the pavement, so that the ice point of water in the surface of the pavement is reduced, snow accumulation and icing on the pavement are delayed, a new solution is put forward for solving the problem of the congelation of the pavement in winter is restrained, and safe running on the pavement is ensured.

This invention relates to a construction technique of the highway used to run carrying full car. At present, the tonnage of these cars on the highway ranges from 30-50 tons, but some of the freight cars exceed 100 tons, and some highways cannot afford such heavy load; in this invention, the construction of the roadbed, the formation, the wearing course, antiskid layer, and surface construction firstly adopt agitating slaked lime and earth mass, laminar lamination, dabbling flocculant to strengthen welding ability of the earth mass; adopt bedload and laying bed course and pouring serosity of BR-C; prepare C80-C100 concrete bearing bed by common cement; add the mixture of rubber particles, little carpolites, and adhesion agent to the asphalt, lay the wearing course, antiskid layer and surface layer in order to improve the expansion, shrinking, and adhesion quality of the different layers of the asphalt mixture, resist the influences of temperature changes and improve its bearing ability.

The invention relates to a color anti-skid ultrathin wearing layer capable of degrading automobile exhaust and a preparation method thereof. The wearing layer consists of the raw materials as follows: epoxy resin, modified epoxy resin, a composite photocatalyst, amine-terminated polyether, a curing agent, a curing accelerator and aggregates. The wearing layer also can be prepared from the raw materials as follows: double-component polyurethane, a composite photocatalyst, a curing agent, a curing accelerator and aggregates. Before the wearing layer is laid, the original road surface needs to be treated, then paying-off and edge protection are performed, binders are mixed, color anti-wear aggregates capable of degrading exhaust gas are scattered uniformly, non-bonded aggregates are recovered, and finally maintenance of the wearing layer, traffic control and opening are performed. The wearing layer has performances of degrading the automobile exhaust and purifying air, can increase the road friction so as to enable the road surface to maintain excellent water mist-proof and anti-skid pavement performance, achieves effects of traffic warning and environment beautifying visually, and has excellent environmental benefit and social benefit.

The invention provides an emulsifier as well as a preparation method and application thereof. The invention discloses the emulsifier applicable to emulsifying SBS modified asphalt and used for substituting for an amphiprotic cationic emulsifier, and provides a preparation process for the emulsifier. The prepared emulsifier is used for emulsifying the SBS modified asphalt to obtain high-viscosity modified and emulsified asphalt, and the high-viscosity modified and emulsified asphalt is applied to a pavement ultra-thin wearing course. The preparation method for the emulsifier is simple in operating procedure and moderate in reaction condition, and can be adopted to prepare the high-viscosity modified and emulsified asphalt with high asphalt content, high viscosity and high bonding property.

The invention provides porous ceramsite and asphalt concrete. The porous ceramsite and asphalt concrete is prepared from components in percentage by mass as follows: 45%-55% of nano-TiO2 sintering-free porous ceramsite, 4.5%-5.5% of SBS modified asphalt and 39.5%-50.5% of supplementing mineral aggregate. The porous ceramsite and asphalt concrete can be applied to laying of automobile exhaust degradation type ultra-thin wearing courses of pavements and has economic benefit, environmental protection benefit and social benefit.

The invention discloses an ultra-thin high-sliding-resistance surface layer of an asphalt pavement and a construction method thereof. The ultra-thin high-sliding-resistance surface layer comprises a wearing layer and an adhesive layer, wherein the wearing layer adopts an asphalt mastic gravel mixture with the nominal maximum size of aggregate being 6.35 mm, a new form of the grading range SMA-7 isprovided, the asphalt mastic gravel mixture is composed of calcined bauxite and limestone, differential burnishing is formed between the calcined bauxite and the limestone, the limestone with the particle size being 4.75 mm to 6.35 mm and the particle size being 6.35 mm to 9.5 mm is replaced with the calcined bauxite in an equivoluminal manner, and the content of aluminum oxide in the calcined bauxite ore is not lower than 88%; the burnishing value of the calcined bauxite is larger than that of the limestone, and the blending amount of the calcined bauxite is 10%-15% according to the mass fraction; and the wearing layer and the asphalt pavement are bonded into a whole through the adhesive layer. According to the ultra-thin high-sliding-resistance surface layer, the skid resistance, the wear resistance and the driving comfort and safety of the road surface can be improved, and the driving noise of the road surface is reduced.

The invention discloses a geocell reinforced cement concrete pavement structure and a surface layer plate thickness calculation method. The pavement structure mainly comprises a base layer, a surfacelayer and a wearing layer which are sequentially laid from bottom to top. The base layer is composed of an upper geotextile layer, a lower geotextile layer and a middle geocell reinforced graded broken stone layer; the surface layer is a cement concrete layer reinforced by a geocell; the wearing layer comprises a cement mixture wearing layer and a geogrid; pull rings are reserved on the two sidesof each geocell in a road direction, the geocells are stretched to be in a tensioned state, and wooden wedges penetrate through the pull rings to fix the geocell at the outermost end. The surface layer plate thickness calculation method mainly comprises the steps of traffic analysis, initial simulation of a pavement structure, determination of pavement material parameters, and checking of load stress, temperature stress and a structure limit state. The problems that an existing pavement structure is low in strength, and a cement concrete pavement is subjected to fatigue fracture, mud pumping,slab staggering and the like under heavy-load traffic are solved, so that the pavement structure has high bearing capacity and deformation resistance, and damage to the pavement structure is reduced.

The invention relates to the technical field of steel bridge deck pavement, in particular to a precast ultra-high-performance concrete steel bridge deck pavement structure and a preparation method. The precast ultra-high-performance concrete steel bridge deck pavement structure sequentially comprises, from bottom to top, a steel slab base layer, a high-toughness resin waterproof bonding layer withthe thickness of 5-10 mm, a high-density fiber concrete precast pavement layer with the thickness of 4-6 cm and an epoxy gravel antiskid wearing layer with the thickness of 3-5 mm. The high-density fiber concrete precast pavement layer consists of high-density fiber concrete precast slabs; the high-density fiber concrete precast slabs internally comprise sparsely-distributed reinforcing mesh; each of the high-density fiber concrete precast slabs is provided with grouting holes and hole bottom dispersion openings in advance; opposite sides of each of the high-density fiber concrete precast slabs are equipped with a locking groove and a locking fastener; and the bottoms of the precast slabs are provided with high-elastic cushion rubber during pavement of a steel bridge deck. The precast ultra-high-performance concrete steel bridge deck pavement structure and the preparation method utilize a high-toughness resin contact surface full bonding manner, and can reinforce the steel bridge deck, thereby avoiding the stress damage to steel slabs caused by conventional welding rivet connection, improving mechanical properties of the pavement structure layer, and facilitating later maintenanceand repair of the pavement layer.