39 results about "Rut" patented technology

The invention discloses an Anti-rut modifier and a preparation method thereof. The modifier comprises the following components by mass: 70%-94% of sulphur, 2%-10% of EVA, 3%-10% of waste rubber powder, and 1%-10% of uintaite. The preparation method comprises the following steps: well mixing sulphur, ethane-vinyl acetate copolymer, waste rubber powder and uintaite, delivering the mixture into an extruder, performing extrusion and granulation to obtain the modifier of the invention. The modifier of the invention has small pungent smell in the preparation process; when the modifier of the invention is added into an asphalt mixture, the anti-rut performance of asphalt pavement is effectively improved, and the modifier has good compatibility with asphalt.

The present invention is a lure optimized for a particular animal such as deer. The optimized lure is made using urine from only two animals urinating at approximately the same time. The animals can be either male or female, but preferably, females in estrus are used for optimal results. This mixture of urine is not diluted in any manner with that of additional animals or preservatives. The urine for the lure is obtained by using a single stall exclusively for only two animals for the purpose of gathering urine. This technique has been especially effective in attracting wandering bucks in rut.

The invention discloses a high-temperature-resistant anti-rut asphalt mixture which comprises the following raw materials in parts by weight: 15-18 parts of pretreated asphalt, 30-35 parts of zinc chloride, 5-10 parts of heat conduction material, 8-12 parts of glass fiber, 5-10 parts of admixture and 90-100 parts of aggregate. The pretreated asphalt is prepared from the following raw materials in parts by weight: 8-14 parts of modified asphalt, 6-8 parts of dihydroxyl-terminated polydimethylsiloxane, 14-16 parts of polycaprolactone glycol, 2-4 parts of 1, 6-hexamethylene diisocyanate, 0.5-1 part of dibutyltin dilaurate and 4-6 parts 4, 4'-dimethyl-2, 2'-dipyridyl, and 0.5-0.8 part of 1, 4-butanediol. The preparation method is reasonable in process design and proper in component proportion, the prepared asphalt mixture has excellent anti-rutting capacity, the high-temperature stability and the water stability of the asphalt mixture are improved, and the asphalt mixture can be applied to roads with large traffic volume and more heavy-load and overload vehicles and has higher practicability.

The invention discloses a soaking rut test accessory device. The soaking rut test accessory device comprises a base, handles and fixing clamping positions all made of metal materials. The handles comprise the first handle and the second handle which are symmetrically connected to the two sides of the base. The fixing clamping positions comprise the first fixing clamping position, the second fixingclamping position, the third fixing clamping position and the fourth fixing clamping position, are connected to the bottom of the base in a rectangular distribution mode and form a whole with the base and the handles, and the effect of fixing the rut plate mold is achieved. The invention also provides a corresponding test method. The device is simple in structure and convenient to operate, can measure the high-temperature rut resistance and the water damage resistance of the asphalt mixture under unconventional test conditions (water and even saline environments), and is used for testing thehigh-temperature stability and the water damage resistance of the asphalt mixture during mix proportion design; therefore, a traditional rut tester can finish quantitative evaluation of the performance of the asphalt mixture under the water immersion condition.

The invention discloses a macadam seal oil flooding degree testing method. The method comprises steps of: preparing a macadam seal sample formed by an asphalt patch, the width of the macadam seal sample being the same as the width of a tire of the rut experimental device, the thickness of the asphalt patch linearly changing along the length direction of the macadam seal sample, and different thicknesses corresponding to different asphalt contents; covering the surface of the macadam seal sample with a light-colored composite fabric, and then carrying out a track test; collecting a lower surface image of the composite fabric after the rut test is finished; calculating the black area proportions of a plurality of regions which are in contact with the broken stone seal sample and are equallydivided along the length direction of the broken stone seal sample; and characterizing the oil flooding degree of the macadam seal under the average asphalt content corresponding to the correspondingregion by using the black area ratio, thereby obtaining a plurality of quantitative indexes of the oil flooding degree of the macadam seal under different asphalt contents. The invention further discloses an asphalt consumption determining method. Compared with the prior art, the method is simple, feasible and more accurate.

The invention discloses an asphalt mixture rutting test device, comprising: a box body; a support platform arranged in the box body, a fixed shaft is arranged on the support platform, and a rotating plate is rotatably connected to the fixed shaft. The rotating plate includes a test template, a connecting plate and a transmission plate connected in sequence from left to right; the motor is arranged in the box and is located below the transmission plate, and the motor drives the transmission plate to swing back and forth The pressure rod is hinged on a short side wall of the box body, a connecting rod is arranged downward in the middle of the pressure rod, the end of the connecting rod is connected with a roller, and the end of the pressure rod is provided with a counterweight so that the rollers are pressed against the surface of the asphalt mixture test form on the test form. The invention can simulate the actual driving condition on the asphalt mixture test mold of the turning or U-turn road section through the reciprocating swing of the asphalt mixture test mold, and can more accurately provide the rutting test data of the asphalt mixture of the turning or U-turn road section.

The low temperature cracking and high temperature rutting of polymer-modified asphalt concrete pavement can be reduced. The composite includes asphalt and at least one polymer that expands at low temperature, triggered by cooling-induced tensile stress, to reduce thermal cracking. The composite includes at least one polymer that expands at high temperature, so that the composite recovers after compression induced by traffic loading at higher temperatures, thereby reducing rutting. The system reduces thermal stress, and reduces or even eliminates thermal cracking and rutting. Shape memory polymers (SMPs) are used to improve asphalt compositions so that they better resist both thermal cracking and rutting. The SMP(s) can be incorporated into the asphalt, or a portion of fine aggregates can be replaced with SMP particles or SMP fibers, or aggregate replacement and asphalt modification can be combined.

The invention discloses an asphalt mixture three-dimensional void connectivity characterization and evaluation method. The method comprises the following steps: preparing an asphalt mixture rut plate test piece, cutting a drill core, and carrying out CT (Computed Tomography) on a core sample; carrying out superposition reconstruction and morphological processing on a projection image obtained by scanning, and carrying out threshold segmentation to identify voids of the core sample, asphalt mortar and aggregate; calculating the void ratio of the reconstruction model, comparing the void ratio with the real void ratio of the sample, and extracting a void ball-stick system of the sample by using a maximum sphere algorithm to carry out visual representation on the three-dimensional distribution of voids; calculating the coordination number of the void ball-stick model and the equivalent length of a throat formed by void communication so as to evaluate the void communication degree; and performing CT scanning on the core sample subjected to wheel rolling again, and reflecting the stability of the void structure of the mixture by virtue of a communication parameter change rate before and after scanning. The method provides a novel way for representing the void connectivity of the mixture on a three-dimensional scale level, and is beneficial to comprehensively understanding the spatial distribution characteristics of the voids of the asphalt mixture.

The invention discloses an asphalt mixture wheel tracking test device. The asphalt mixture wheel tracking test device comprises a main body with a sealed structure and a temperature control structure for providing temperature control in the main body, wherein the main body is internally provided with a main shaft and a motor for enabling the main shaft to rotate; the main shaft is uniformly connected with a plurality of hydraulic connecting rods; the end parts of the hydraulic connecting rods are connected with rubber rolling wheels; a fixing device for fixing a test piece is arranged just below the main shaft; the main body is further internally provided with a frequency conversion and speed regulating box for controlling the movement frequency of the motor. According to the device disclosed by the invention, the design of a counterweight block is omitted so that a series of problems caused by the counterweight block are solved; the temperature adjustment can be carried out so that tests under different temperature are realized.

The invention discloses a modified asphalt mixture resistant to high temperature wet-dry method and its preparation method and application, aiming to provide a modified asphalt mixture preparation with good performance, economy, mechanized construction, high temperature and water damage resistance, and rutting resistance Construction method. The modified asphalt mixture resistant to high temperature wet-dry method includes the following materials in weight percentage: 95.921%~94.671% of stone materials of various specifications; 3.8%~4.5% of base asphalt; 0.12%~0.185% of SBS; 0.015%~0.090% of rubber oil; Agent 0.02% ~ 0.014%; rock asphalt + diatomaceous earth 0.133% ~ 0.540%. The paved asphalt concrete pavement paved by the invention is resistant to high temperature rutting and water damage, can prevent early damage, reduce repair and maintenance costs, and prolong the service life of the road.

The invention relates to a rut sample forming machine which comprises a workbench. One side of the workbench is provided with a mounting frame and a first driving part used for driving the mounting frame to slide, the mounting frame is provided with a mounting block and a second driving part used for driving the mounting block to slide, and the mounting block is rotatably provided with a rolling wheel. A rectangular placement groove is formed in the middle position of the workbench, and a test mold is detachably arranged in the placement groove. The two sides of the placement groove are each provided with a discharging groove, and the sides, close to the placement groove, of the discharging grooves are connected with the placement groove. During an experiment, the test mold is placed in the mounting groove, the mounting frame is moved to the position above the test mold, then the mounting block is driven to drive the rolling wheel to move downwards, pressure is applied to an asphalt material in the test mold, the asphalt material is rolled, and when the asphalt material in the test mold overflows outwards, the asphalt material enters the discharging grooves in the two sides, a situation that overflowing asphalt materials make contact with the rolling wheel to affect movement of the rolling wheel is effectively avoided, and the experiment accuracy is improved.

The invention discloses an anti-rutting modifier and a preparation method thereof. The modifier comprises: 70% to 94% of sulfur, 2% to 10% of EVA, 3% to 10% of waste rubber powder and hard asphalt in terms of mass percentage 1% to 10%. The preparation method includes the following steps: uniformly mixing sulfur, ethylene-vinyl acetate copolymer, waste rubber powder and hard asphalt, conveying the mixture to an extruder for extrusion and granulation to obtain the modifier of the present invention. The modifying agent of the present invention has little pungent odor during the preparation process, and the modifying agent of the present invention is added into the asphalt mixture, which can effectively improve the anti-rutting performance of the asphalt pavement, and has good compatibility with asphalt.

The present invention relates to the technical field of asphalt antiaging agents, in particular to red mud-silicate composite antiaging agents, asphalt mixtures and their preparation methods and applications. In parts by weight, the raw material composition of the antiaging agent includes: red mud 40 ‑70 parts, 10‑30 parts of silicate material, 1‑10 parts of slaked lime, 1‑10 parts of lime mud, 10‑20 parts of aromatic oil. The present invention combines the performance characteristics of red mud and silicate materials to prepare an anti-aging agent compounded with red mud and silicate materials. The anti-aging agent can effectively improve the temperature resistance to rutting and low temperature crack resistance of asphalt mixtures And water stability, and the dynamic modulus has been significantly improved, which can reduce the damage caused by aging of the asphalt pavement during service, prolong the service time of the road, and reduce the cost of road maintenance.

The invention provides a solid warm-mix modified double-effect asphalt modifier and a preparation method thereof, which is mainly prepared from the following raw materials: MAH-g-POE, lysine hydrochloride and polyether glycol monomethyl ether . The solid warm-mix modified double-effect asphalt modifier has dual functions of warm mix and modification. Specifically, the polyether segment contained in it has non-ionic surface activity and lubricating effect, which can reduce the surface interfacial tension between asphalt and aggregate stones, improve the fluidity of the asphalt mixture, and make the asphalt mixture far below the hot mixing temperature. Mix evenly with mineral materials to achieve warm mixing effect. The POE chain contained in it has strong toughness, which can effectively improve the high temperature shear resistance and impact resistance of asphalt mixture, thereby improving the high temperature rutting resistance and low temperature flex resistance of asphalt modified materials; the grafted horse The acid amide group has strong polarity, which makes the asphalt mixture and aggregate stones tightly wrapped, and the mixture is more uniform; realizes the modification effect and improves the pavement performance of the asphalt mixture.

The invention relates to a high-strength modified asphalt and a preparation method thereof proposed by the invention, comprising the following components in parts by weight: 40-90 parts of 70# base asphalt, 5-9 parts of a polymer modifier, a composite anti-rutting aid 15-35 parts of antioxidants, 0.5-1.5 parts of antioxidants, 3-7 parts of organic viscosity reducers, and 0.2-0.4 parts of stabilizers. Different from the existing single rock asphalt modification with a large content, the composite modification uses other materials such as petroleum resin to compound or replace the rock asphalt to improve the high temperature performance of the asphalt under the premise of reducing the content of the rock asphalt. Under the premise of performance, the modified asphalt can be stored stably, and it is not easy to deposit on the bottom of the tank and pollute the production pipeline, so as to ensure the quality of asphalt production.