191 results about "Pavement engineering" patented technology

The invention discloses permeable recycled aggregate and ceramsite concrete doped with industrial and agricultural solid waste and preparation. The permeable recycled aggregate and ceramsite concrete doped with industrial and agricultural solid waste is characterized in that recycled coarse aggregates and ceramsites are taken as coarse aggregates of concrete, an appropriate amount of pretreated industrial and agricultural solid waste such as industrial waste, agricultural waste, household garbage and the like is taken as an admixture, a cementing agent is prepared from cement, water, a superplasticizer and a reinforcement material, and the materials are mixed with a preset stirring process and preparation method, so that ecological concrete with good mechanical property, permeable property and durability is produced. According to the concrete, the waste utilization rate is up to about 80%, the concrete is environment-friendly, locally available materials can be used, the economic benefit is remarkable, ceramist pore is smaller, and sewage can be continuously and stably treated, so that the concrete is commonly used in water environment comprehensive improvement engineering; and besides, the concrete has light weight, high strength and good water permeability and can be also used in permeable pavement engineering such as a sidewalk, a parking lot and the like as well as plant engineering such as ecological riverway slope protection, roof landscape planting and the like.

The invention discloses a detection method of bituminous mixture, including the following steps: digital image collection of bituminous mixture is completed; image processing of the acquired digital image is completed to obtain the content of compositions of the bituminous mixture. Moreover, the invention also discloses a detection system for the bituminous mixture. Both the method and the system can complete effective separation and extraction of bitumen, airgap, aggregate and aggregate particle of different particle diameter and realize direct determination and calculation of volumetric composition characteristic parameter of the bituminous mixture through converting the obtained characteristic parameter into volume ratio; moreover, the invention improves the mechanical property of the bituminous mixture and provides reliable basis for the scientificity in bituminous pavement engineering research.

The present invention relates to asphalt road engineering, and is especially one stress absorbing asphalt macadam layer and its construction process. The stress absorbing asphalt macadam layer can absorb and reduce the stress of asphalt road surface or composite road surface and weaken the transmission of cracks to the surface asphalt layer. It consists of one macadam layer, one stress absorbing and binding layer and one connecting layer from top to bottom. Its construction process includes the steps of spreading connecting layer material onto the base layer, spreading the stress absorbing and binding layer and spreading the macadam layer. The stress absorbing and binding layer has material of polymer modified emulsified asphalt, high viscosity emulsified asphalt, hot SBS modified asphalt or rubber modified asphalt; and the connecting layer has material of kerosene diluted asphalt, high permeability emulsified asphalt, concrete interface adhesive, polymer modified emulsified asphalt or hot modified asphalt.

The present invention relates to road structure and construction technology, and is especially road structure with flexible fiber and emulsified asphalt stabilized aggregate layer as the base layer and its construction process. The road structure includes one bottom layer; one base layer and one paved surface layer, and the base layer of rolled flexible fiber and emulsified asphalt stabilized aggregate is formed through mixing flexible fiber, emulsified asphalt, cement and water to form cementing material, adhering aggregate, stuffing, admixture, etc with the cementing material, and rolling. The rolled flexible fiber and emulsified asphalt stabilized aggregate has improved early plastic shrinking, dry shrinking and hot shrinking performance, obviously raised anticracking performance, toughness, impact strength, frost resistance, erosion resistance and water stabilty, and doubled antifatigue performance. The road with the said base layer has raised performance and increased service life.

The present invention relates to road structure and construction technology, and is especially road structure with rolled flexible fiber cement concrete layer as the base layer and its construction process. The road structure includes one bottom layer; one base layer and one paved surface layer, and the base layer of rolled flexible fiber cement concrete is formed through mixing flexible fiber, cement and water to form cementing material, adhering aggregate, stuffing, admixture, etc with the cementing material, and rolling. The rolled flexible fiber cement concrete has obviously improved early plastic shrinking, dry shrinking and hot shrinking performance, obviously raised anticracking performance, toughness, impact strength, frost resistance and erosion resistance, and doubled antifatigue performance. The road with the base layer of rolled flexible fiber cement concrete has raised performance and increased service life.

The invention discloses a high modulus asphalt mixture additive (Rohillard PAC-M), the formula is as follows: polyethylene PE: 20 to 70 percent, polyester PES: 0.9 to 10 percent, polypropylene PP: 15 to 60 percent, polyvinyl chloride PVC: 20 to 50 percent, chlorinated polypropylene PP-C: 5 to 10 percent, rubber: 3 to 5 percent, asphalt: 1 to 6 percent, cellulose: 1 to 4.5 percent and auxiliary agent: 0.1 to 0.5 percent. The product is characterized in that the polymerization temperature is T, T is not less than 130 DEG C and not more than 190 DEG C, and the particle size d of the product is is not less than 1mm and not more than 6mm, the particles are granular (90 percent of the product). The color/shape of the product is dark brown. The high modulus asphalt mixture additive is mainly applied in the new construction and the overhaul of high-grade highways, heavy traffic roads and transportation main trunk line roads, as well as the curing and other road projects. The high modulus asphalt mixture additive is mainly characterized in that: the high modulus asphalt mixture additive has great advantages of high-temperature rut resistance, low-temperature cracking resistance, prevention of water damage and durability.

The invention provides integrated repairing equipment for road surface engineering. The integrated repairing equipment comprises an equipment body, a flood drainage pipeline structure, a fixing clamping ring, an intelligent control alarm device, a road surface level detecting device, a road surface projection polishing device, a broken stone cleaning device, a broken stone collecting device, a water spraying device, front wheels, a car backing camera and a road rolling wheel. The flood drainage pipeline structure is mounted on the outer side of the upper portion of the equipment body through the fixing clamping ring. Rapid pumping, flow guiding and draining of the accumulated water on the road surface are facilitated through arrangement of a flood drainage guide pipe and a water suction pump, and thus the flood drainage effect is improved; impurities in the accumulated water are conveniently prevented from entering the flood drainage guide pipe through arrangement of an adjusting hoseand a filtering head; the projection part on the road surface can be conveniently polished and cleaned through arrangement of a polishing wheel, a stainless steel brush head and a polishing motor, sothat the road surface is more level and smooth; and broken stones are conveniently prevented from hitting against a broken stone collecting frame directly to cause large noise through arrangement of abroken stone containing bag.

The invention discloses an anti-lateral seepage asphalt pavement water seepage device with a constant-pressure variable head and a method, and belongs to the technical field of pavement engineering detection. Specifically, a testing box bottom plate is arranged in a testing box body; a sealing top cover and a sealing ring are arranged at the top of the testing box body; a sealing layer made of a waterproof material is additionally mounted at the periphery of the testing box body; a testing part is arranged in the middle of the testing box body; a water tank is adopted to supply water to the whole device through a water tube; a water body pressurizing cylinder is used as a water body pressurizing device; a pressurizing rubber piston is pushed to move downwards by a pressurizing vertical rod through a pressurizing load to pressurize a water body; a pressurized water body is in contact with the testing part through a water discharge tube; a seepage water body flows into measuring glass from water seepage holes, a water collection tank and a water guide tube. By adopting the device and the method, influence of lateral seepage and the variable head to testing data can be effectively eliminated, the detection data stability can be greatly improved, the water seepage property of an asphalt pavement can be relatively and accurately judged, artificial errors made by different testing operators can be effectively reduced, the detection data can be relatively good in stability, and good economic benefits and wide application prospects can be achieved.

The invention relates to a splicing method and structure for new and old roads in reconstruction and extension of a pavement. The splicing parts of new and old roads and loading positions of vehicle wheels are staggerly arranged. The base layers and subbase layers of new and old roads are connected in a step manner, so a contact area of the roadbeds of the new and old roads is increased and frictional force at bonding sites is improved. Construction of pavement layers of the new and old roads is carried out in an inverse step manner, and the splicing parts of the pavement layers can be flexibly adjusted to favorable stress states through adjusting the width of step so as to be kept away from wheelmark zones. The thickness of a water-stop belt depends on the height of a longitudinal joint surface where the belt is located, so the functions of sealing and water stopping of the water-stop belt are realized. Ribbed reinforcement nets are laid at the splicing parts on the top of the subbase layers of cement stabilized macadam of the new road to improve the anti-shearing and anti-bending performance of the parts. The splicing method and structure provided by the invention can improve the splicing quality of new and old roads of a pavement reconstruction and extension project and carrying capacity and endurance of an integral pavement project; and the method and structure are simple, practicable, fast in construction speed, labor-saving, time-saving and good in construction quality and allows the pavement to have good anti-shearing and anti-bending performance.

The invention belongs to the field of road material preparation, and particularly relates to a high polymer asphalt modifier and a preparation method and application thereof. The invention solves the technical problem of providing a novel asphalt modifier. The high polymer asphalt modifier is formed by polymerizing a component A and a component B and is a rubber and plastic composite high polymer material with high elasticity and high adhesive property. After the matrix asphalt is modified by the asphalt modifier disclosed by the invention, asphalt mineral materials do not need to be heated when being blended, and the materials can be blended, paved and ground at the temperature of -10 DEG C-60 DEG C. The blended mixture can be stored for a long time and is not limited by weather conditions, materials are not wasted, a large amount of oil, fuel, freight and labor cost can be saved, and the cost of pavement engineering is greatly reduced.

The invention provides a paver and relates to the field of pavement engineering machinery. The paver comprises a main frame, a buffer cylinder mounted on the front end of the main frame, a swing beam mounted behind the buffer cylinder at the front end of the main frame, an electric appliance control system, a screed plate on the rear end of a draft arm, main frame connecting columns, a road shoulder distributor and a road shoulder forming machine, wherein the main frame connecting columns are correspondingly arranged on the left and right sides of the main frame and behind the swing beam; the road shoulder distributor is arranged between the swing beam of the main frame and the buffer cylinder mounted on the front end of the main frame; the road shoulder forming machine is mounted on the side surface of the screed plate. The paver is capable of completing paving, leveling and punning in one step during road shoulder filling, is simple and convenient to operate and is capable of carrying out continuous construction, the construction quality is improved and the cost is saved.

The invention belongs to road surface engineering machinery and a control method thereof, in particular to dynamic measurement system and dynamic measurement method of stabilized soil stirring equipment. The measurement system comprises a belt conveyer and a hopper, wherein the belt conveyer is driven by a drive motor, the hopper can discharge materials to a material delivery belt of the belt conveyer, a support roller of the material delivery belt is provided with a weighing sensor which can detect the pressure of the support roller, a rotating shaft of a driven wheel of the belt conveyer isconnected with a counting wheel, a speed measurement sensor which is matched with the counting wheel is arranged beside the counting wheel, the detection signals of the weighing sensor and the speed measurement sensor are input into an industrial control computer, and a control signal of the industrial control computer controls the drive motor of the belt conveyer by a frequency converter. The system has double advantages of volume measurement and weighing measurement, enhances the measurement accuracy and the reliability, lowers the equipment cost, can realize real-time automatic control andhas high degree of automation and convenient operation.

The invention belongs to road engineering machinery and relates to a regulating mechanism for the centre of gravity of a spreading machine. The mechanism includes a pair of sliding tracks longitudinally arranged on a chassis of the spreading machine; and a clump weight which can move backward or forward along the sliding track is arranged between the two sliding tracks, and is driven by a hydraulic cylinder. The hydraulic cylinder is driven by a hydraulic driving device which is controlled by a controller, and a detection signal input part of the controller is connected with a plurality of pressure sensors, which are distributed at the different positions of the caterpillar of the spreading machine. The invention changes the center of gravity of the whole spreading machine by driving the clump weight to move by the hydraulic cylinder, the center of gravity of the spreading machine can be adjusted at any moment according to the spreading width and the change of an ironing board, the adjustment process can be controlled by the controller according to the real-time signal of the pressure sensor, therefore, the adjustment is convenient and reliable.

The invention relates to the field of pipe pavement engineering, in particular to a pipe support frame. The pipe support frame comprises a frame module, a groove rod module, a transverse frame module,a positioning piece and a pipe frame; the height and the left-right position of a support pipe in the device can be adjusted; the device can adapt to pavement of an inclined pipe forming a certain angle with the ground; and the pipe can be rotated on the device to achieve pavement of the pipe needing to be connected through threads. The frame module comprises side plates, trapezoidal convex bars,cylindrical convexes, rectangular convex bars, a front bottom batten and a back bottom batten; the two side plates are provided; the back bottom batten is fixedly connected between the back ends of the lower ends of the two side plates; the front bottom batten is fixedly connected between the front ends of the lower ends of the two side plates; the rectangular convex bars are arranged on the front and back end surfaces of the two side plates; the side plates are arranged on the upper end surfaces of the two side plates; and the cylindrical convex is fixedly connected to the middle positions of opposite surfaces of the two side plates.

The invention belongs to the field of pavement engineering machinery, and relates to a self-feedback floating scraping system of a pavement milling machine. The self-feedback floating scraping system comprises a scraping plate and a control system, wherein the scraping plate is arranged on the lower part of a turning body of the pavement milling machine and can lift by being driven by a scraping plate oil cylinder; the control system is used for controlling the lifting of the scraping plate, and comprises a pressure sensor which is arranged on the scraping plate and can detect ground pressure of the scraping plate; the detection signal output end of the pressure sensor is connected to a CPU (Central Processing Unit) capable of processing detection data; and the control instruction output end of the CPU is connected to a scraping plate valve group capable of controlling the action of the scraping plate oil cylinder. The self-feedback floating scraping system disclosed by the invention can keep the appropriate ground pressure all the time for milling in a pulling and scraping operation process by detecting and regulating the ground pressure of the scraping plate in real time, thereby being suitable for the change of pavements with different terrains and improving the construction effect and efficiency.

The invention relates to a pavement engineering material, and concretely relates to a semi-rigid asphalt pavement material and a preparation method thereof. The semi-rigid asphalt pavement material comprises, by volume, 75-85% of a macro-porous asphalt mixture and 15-25% of a grouting material; the macro-porous asphalt mixture is obtained through mixing mineral, a filler and rubber high-viscosity modified asphalt; and the grouting material is obtained through mixing fine particle modified emulsified asphalt, PC42.5 composite Portland cement, an active admixture, sands, water, a water reducer, an aluminum powder, an expanding agent, an air entraining agent, an antifoaming agent and limestone mineral powder. The semi-rigid asphalt pavement material has the advantages of good construction workability, strong high-temperature rut resistance and low-temperature cracking resistance, good durability, long fatigue life, good combination property of the macro-porous asphalt mixture with the grouting material, small temperature shrinkage and dry shrinkage cracks, energy saving, environmental protection, and realization of the high cost performance of recycling of solid wastes.

The invention belongs to the technical field of pavement material engineering, and particularly discloses a high-strength pavement functional material for laying a stress absorption band. The material is prepared from the following raw materials in parts by weight: 100 parts of asphalt, 6-12 parts of thermoplastic styrene-butadiene rubber (SBS), 0.5-1.5 parts of polyphenylether, 20-30 parts of epoxidized natural rubber and 3-5 parts of fiber. The high-strength pavement functional material has the advantages of high tensile strength, favorable bonding power with the pavement structural layer, temperature change resistance, simple construction process and the like, has favorable effects for treating old cement concrete pavement cracks and asphalt pavement cracks and preventing crack reflection when being used in cement concrete pavement modification combined pavement engineering and asphalt pavement laying engineering, and has important meanings for enhancing the service life and roadability of the combined pavement.

The invention relates to concrete, in particular to cast-in-situ colored permeable ecological concrete and a road surface construction process thereof. Each cubic meter of concrete is prepared from the following raw materials by weight: 200 to 350 kilograms of cement, 80 to 150 kilograms of water, 1,200 to 1,550 kilograms of coarse aggregates, 180 to 280 kilograms of fine aggregates, 4.5 to 5.5 liters of ZS series concrete admixture and 10 to 18 kilograms of pigment. The ecological concrete can be mixed by utilizing a mixing plant; and after being conveyed to a construction site by a commercial concrete mixer and added with the admixture, the ecological concrete can be subjected to the pouring constructing of road surfaces directly without vibrating and are only needed to be plastered by a metal trowel, so the construction efficiency is improved greatly. The ecological concrete is used for road surface engineering, uses a small amount of the cement, has high strength and water permeability, and can be widely applied to light traffic road surfaces such as side pavements, parks, neighborhoods and the like.

The invention discloses a system for identifying and automatically drafting asphalt road surface diseases and a method of the system. The method comprises the following steps of collecting initial data of the technical condition of an asphalt road surface by a road comprehensive monitoring vehicle; converting the initial data of the technical condition of the road surface into a normalized engineering object by a road surface engineering converting module; performing manual identification on the road surface diseases by a road surface disease identifying module; automatically generating a road surface disease detail list by a report generation module; and extracting information from the road surface disease detail list by an automatic generation module of road surface disease horizontal distribution CAD drawing sheets, and automatically drafting and generating a road surface disease horizontal distribution CAD drawing sheet. The method disclosed by the invention is free from a conventional method of performing manual investigation and manual recording on the road surface diseases, and then manually drafting the CAD drawing sheet according to the recorded information, so that the efficiency and the accuracy of identifying the asphalt road surface diseases and displaying the distribution of the asphalt road surface diseases are greatly improved, and the generated road surface disease horizontal distribution CAD drawing sheet can be directly used for guiding the maintaining design and the construction of asphalt road surfaces, and the engineering application prospect is wide.

The invention discloses a pavement petroleum asphalt high temperature and low temperature using performance rapid detection method, and belongs to the field of pavement engineering. According to the pavement petroleum asphalt high temperature and low temperature using performance rapid detection method, a dynamic shear rheometer is adopted, organic combination of time scanning and frequency scanning is realized, and asphalt high temperature performance and low temperature performance are obtained via one time of scanning experiment. The pavement petroleum asphalt high temperature and low temperature using performance rapid detection method comprises following steps: 1, dynamic shear time scanning and frequency scanning of pavement petroleum asphalt are carried out using the dynamic shear rheometer so as to obtain different asphalt frequency scanning curves in a certain temperature range; 2, a temperature-rut factor change curve is drawn for regression analysis, and asphalt high temperature evaluation is carried out; and 4, parallel displacement of different temperature scanning curves is carried out based on time-temperature equivalence principle so as to obtain displacement factors, fitting is carried out based on WLF equation derived formula, pavement petroleum asphalt glass-transition temperature is obtained via back calculation, and low temperature pavement using performance rapid determination is carried out. Compared with the prior art, the pavement petroleum asphalt high temperature and low temperature using performance rapid detection method possesses following advantages: the pavement petroleum asphalt high temperature and low temperature using performance rapid detection method is rapid, and is high in efficiency, credibility, and applicability.

The invention discloses a recycling utilization technology of an old asphalt mixture of a high type asphalt pavement. According to the invention, for the chemical composition change condition of the old asphalt mixture in the asphalt pavement, saturates, aromatics, colloids and asphaltenes in the asphalt are analyzed by a component method; the missing part in the old asphalt is adjusted by adding an activator according to the change of each component of the aged asphalt; the component transfer problem (commonly known as aging) of the old asphalt material in the asphalt pavement is solved from the aspect of recovering the chemical components of the old asphalt; as a result, the chemical components of the old asphalt material are re-activated, the old asphalt mixture is caused to obtain new technological performance, the original mechanical properties and pavement performance indicators of the old asphalt mixture are recovered, and the old asphalt mixture can be better utilized by pavement engineering again.

The invention is ecological concrete mixture used for bearing structure of civil engineering and prodn. method. It is produced by stirring main raw material regenerated crude aggregate created by grinding discarded concrete, cement, flyash and water.

The invention relates to manufacturing of a foaming agent applied to foamed asphalt production for pavement engineering, as well as asphalt mixed material warm-mixing construction, asphalt pavement cold-regeneration and modified asphalt technologies, in particular to an asphalt foaming agent for foamed asphalt and modified asphalt, and a preparation method of the asphalt foaming agent. The components of the asphalt foaming agent are natural latex and industrial latex, wherein the mass ratio of the natural latex to the industrial latex is 100:0 to 0:100; and the solid content mass percent is 1 to 80 percent, preferably 30 to 80 percent. The foaming agent provided by the invention not only can increase the expansion rate and the half-life period of asphalt foaming and improve the stability of the foamed asphalt, but also can obviously improve the high and low temperature properties of the asphalt and improve the character of the asphalt.