11 results about "Wearing course" patented technology

This invention discloses a method for coordinated control of asphalt pavement paving and compaction, relating to the field of asphalt pavement construction technology. Before operation, the invention inputs basic data to the central control unit and calibrates the lower limit of the allowable temperature for compaction. During paving, it collects the three-dimensional position coordinates of the paver, the temperature data of the loose layer, and the thickness data of the loose layer. During compaction, it collects the three-dimensional position coordinates and trajectory of the roller, the temperature data of the compacted layer, and the compaction degree value. The central control unit synchronizes and matches the data, calculates the temperature drop rate, and issues elevation adjustment and additional compaction commands after comparing deviations. This invention enables precise coordination between paving and compaction processes, real-time calculation of the temperature drop rate and remaining compaction time, automatic elevation adjustment, and issuance of additional compaction commands, improving the construction quality and stability of ultra-thin wearing course layers, reducing early-stage defects, and extending the service life of the pavement.

The present application relates to a method for asphalt thin layer overlay construction of cement bridge and pavement and a crack pouring device, the method comprising: 1) old cement bridge and pavement detection and treatment; 2) bonding layer construction: spraying modified emulsified asphalt on the old cement bridge and pavement to form a bonding layer, 3) ultra-thin wearing layer paving: using a synchronous paver, paving on the bonding layer to form an asphalt thin layer overlay, the paving thickness is 1.5-2.5 cm; 4) rolling and opening to traffic: using a steel wheel roller to roll the pavement for 2-4 times. The interlayer bonding strength between the added asphalt thin layer overlay and the old cement pavement is greater than or equal to 1.2 MPa, effectively preventing delamination; the asphalt thin layer overlay can effectively inhibit the generation and expansion of reflection cracks, has excellent high and low temperature performance and water stability, the pavement added thickness is significantly reduced, only 1.5-2.5 cm, reducing the material consumption, structural load and highway auxiliary facility adjustment.

The utility model provides a kind of highway subgrade ultra-thin wearing course spraying device, it is related to asphalt pavement repair field, comprising: spraying assembly, the spraying assembly is by holding mechanism and spraying mechanism composition, spraying assembly can be by monitoring the moving state of independent traction vehicle's moving wheel, realize the automation start-stop of material spraying function, to realize the function of automatic material spraying of vehicle, vehicle stops material and terminates spraying, without manual control, it is flexible and convenient to use, and under the action of spraying assembly, spraying rod can always keep fixed interval with roadbed and carry out the function of material spraying, construction quality is high, solve the start-stop of material spraying of existing spraying device, which is manually controlled in cab, which leads to material spraying cannot be started and stopped according to the moving state of vehicle, and it is easy to appear the problem that vehicle stops material and still sprays or vehicle material is not timely sprayed.

This invention provides a chemically modified high-viscosity and tough asphalt and its preparation method, comprising the following components in parts by weight: 100 parts base asphalt, 3-8 parts styrene-butadiene-styrene block copolymer, 2-10 parts composite petroleum resin, 0.1-4 parts maleic anhydride, 0.1-2 parts polyphosphoric acid, 0.05-0.15 parts crosslinking stabilizer, and 0.1-1 parts composite antioxidant. This modified high-viscosity and tough asphalt, obtained through chemical composite modification, not only possesses excellent high-temperature deformation resistance, elastic recovery performance, low-temperature flexibility, and fatigue resistance, but also exhibits improved compatibility between the asphalt and the modifier through chemical modification. The preparation method of this composite modified high-viscosity and tough asphalt is simple and yields excellent performance, making it suitable for ultra-thin wearing courses, heavy-duty asphalt pavements, bridge deck paving, and other fields.

Methods for partial or full-surface sealing of drivable concrete traffic surfaces comprising the following work steps: 1. Substrate treatment with a primer based on aliphatic polyisocyanates and polyaspartic acid ester mixtures 2. Application of a liquid sealing layer based on aliphatic polyisocyanates and polyaspartic acid ester mixtures 3. Application of an adhesive layer based on aliphatic polyisocyanates and polyaspartic acid ester mixtures 4. Sprinkle quartz sand into the bonding layer 5. Application of at least one mastic asphalt wearing course characterized in that polyaspartic acid ester mixtures are used, containing at least i) a polyaspartic acid ester of the structure ii) at least one further amino-functional polyaspartic acid ester of the general structural formula in which R1 and R2 independently represent a methyl group or an ethyl group and X represents a divalent organic residue formed by removing the amino groups from an amino polyether of the general structural formula, which also includes corresponding constitutional isomers and n represents a number from 2 to 8, preferably 2.5 to 6.5 and particularly preferably 2.5 to 4.5.

This utility model discloses a synchronous spraying device for emulsified asphalt in ultra-thin wearing course asphalt mixture paving, solving the problem in the prior art where the number of nozzles remains constant when the spraying width of the outer spraying device is adjusted by rotation, resulting in uneven nozzle coverage density. It includes an outer spraying device positioned on the outer side of the paver's travel path, used to spray emulsified asphalt onto the outer area of ​​the travel path. The outer spraying device is mounted on the paver via a crank. Driven by a rotary drive mechanism, the crank and the outer spraying device rotate as a whole around an axis between the crank and the paver. The axis is vertically oriented, located inside the travel mechanism and close to its center line. When the crank drives the outer spraying device to rotate around the axis, the number of nozzles covering the corresponding outer area on the outer spraying device can increase or decrease accordingly with the direction of rotation.

This invention discloses a non-full-thickness cement pavement overlay material and its construction process. The non-full-thickness cement pavement overlay material is composed of basalt, shape memory particles, limestone powder, and high-elasticity modified asphalt. It can improve the crack resistance of the stress-absorbing layer, delay longitudinal reflective cracking, and extend the service life of the pavement. The construction process involves fine milling the cement pavement to create grooves on the surface; uniformly applying a high-strength interlayer adhesive across the entire pavement; then, spreading the non-full-thickness cement pavement overlay material on top of the high-strength interlayer adhesive as a stress-absorbing layer. This pavement structure can reduce the consumption of building materials such as stone and asphalt by approximately 30%, resulting in significant environmental and economic benefits. Finally, after the non-full-thickness cement pavement overlay material is constructed, a 4-5cm thick wearing layer is applied on top, effectively enhancing the surface wear resistance, extending the service life of the pavement, and improving driving comfort and safety.

The utility model discloses a kind of bridge deck maintenance's pavement structure, belong to road and bridge engineering technical field, including shear nail, UHPC grouting layer, prefabricated UHPC plate assembly and TRC wearing layer;The UHPC grouting layer, prefabricated UHPC bridge deck plate and TRC wearing layer are sequentially laid on bridge deck steel plate from below to above;Several holes are formed in the prefabricated UHPC plate assembly;Shear nail is equipped in the hole;The shear nail one end passes through UHPC grouting layer and is fixed on bridge deck steel plate.The utility model's bridge deck maintenance's pavement structure, give full play to UHPC superhigh durability and superhigh mechanical property, and the characteristics that TRC high-temperature stability is strong, water damage resistance ability is strong and low-temperature flexibility is strong, realize the disease of asphalt concrete bridge deck to carry out rapid maintenance, and the durability of bridge deck pavement after maintenance is improved, ensure driving safety and comfort, improve comprehensive benefit.

The utility model discloses a novel combined steel bridge deck pavement structure relates to highway engineering technical field, including steel bridge deck, epoxy macadam asphalt connecting layer, dense asphalt mixture structural layer, dense polyurethane mixture structural layer, keep wearing layer and waterproof adhesive layer. Dense asphalt mixture structural layer is laid in the position of the upper side of epoxy macadam asphalt connecting layer, dense polyurethane mixture structural layer is laid in the position of the upper side of dense asphalt mixture structural layer, keep wearing layer is set in the position of the upper side of dense polyurethane mixture structural layer, waterproof adhesive layer is set between dense asphalt mixture structural layer and dense polyurethane mixture structural layer and between dense polyurethane mixture structural layer and keep wearing layer, and the overall strength and waterproof capacity of steel bridge deck pavement can be promoted through the structure of each layer.

This application relates to a thin-layer wear-resistant asphalt concrete and its preparation method, belonging to the field of asphalt concrete technology. It includes modified asphalt, coarse aggregate, fine aggregate, mineral powder, an interfacial active primer, and a dynamic toughening crosslinking agent. The interfacial active primer constructs a covalent anchoring layer and catalytic microdomains on the aggregate surface, guiding the dynamic toughening crosslinking agent to undergo a gradient crosslinking reaction in the asphalt mixture. This results in a high-modulus "hard shell" at the aggregate interface while maintaining a flexible "soft core" in the asphalt matrix. This structure eliminates the weak interfacial regions of traditional materials, optimizing stress transfer and improving load-bearing efficiency, thus significantly reducing the surface layer thickness. Simultaneously, the reversible exchange capacity of the dynamic covalent bonds in the crosslinking network under the action of the catalyst endows the material with microscopic self-adaptive functions, effectively inhibiting the initiation and propagation of microcracks, thereby simultaneously enhancing wear resistance while reducing the thickness.