6results about How to "Lower mixing temperature" patented technology

The invention discloses a warm-mix asphalt mixture and a preparation method thereof. The asphalt mixture comprises, by weight, 5-7 parts of pretreated SBS asphalt, 25-30 parts of modified fine aggregate, 45-60 parts of modified coarse aggregate, 8-12 parts of filler, 1-2 parts of warm-mix agent, 2-4 parts of additive, and 0.02-0.05 parts of accelerator. The preparation method of the invention comprises the following steps: heating the pretreated SBS asphalt to 110-130°C, sequentially adding the warm-mix agent and the additive under stirring, stirring, shearing, adding the accelerator, and then adding the modified fine aggregate, the modified coarse aggregate, and the filler. The asphalt mixture of the invention has a low mixing temperature, and the aging resistance, structural strength, low-temperature performance, salt erosion resistance, and the like of the obtained asphalt mixture are significantly improved.

The invention relates to the technical field of road engineering asphalt pavement materials, in particular to a preparation method, a product and application of a polyethylene wax asphalt modifier. The preparation method of the polyethylene wax asphalt modifier comprises the following steps: uniformly mixing polyethylene particles and a cracking catalyst to obtain mixture particles; the mixture particles are fed into a double-screw extruder to be extruded, and micro-cracking liquid glue is obtained; and carrying out high-temperature and high-pressure reaction on the micro-cracked liquid glue to obtain the polyethylene waxy asphalt modifier. The cracking catalyst is prepared by loading nickel on expanded vermiculite powder. The polyethylene waxy asphalt modifier has the advantages that the asphalt viscosity is reduced, the asphalt is modified, the compatibility and storage stability between the asphalt and polyethylene are improved to a great extent, and compared with the common polyethylene cracking technology, the polyethylene waxy asphalt modifier has the advantages that a large amount of energy consumption can be reduced; and the recycling degree of the waste polyethylene plastic can be increased, energy conservation and environmental protection are achieved, and efficient utilization is achieved.

The application discloses a warm-mixing in-place hot recycling asphalt mixture modifier and a preparation method thereof. The modifier comprises: 90# base asphalt, coumarone-indene resin, waste rubber powder, linear 30 / 70 type SBS, 4,4'-dithiodimorpholine, butyl propionate, poly-alpha-olefin, N-(2-hydroxyethyl)dodecylamide, cocamide propyl betaine and composite release agent. The modifier can reduce the use amount of new asphalt and recycling agent to a certain extent, significantly improve the performance of the recycled pavement and solve the problems of poor low-temperature performance and poor water damage resistance of the recycled pavement. In addition, some additives contained in the modifier have certain surface-active warm-mixing agent characteristics, thereby reducing the mixing temperature and improving the compaction degree of the in-place hot recycling mixture.

The invention relates to the field of asphalt auxiliaries, and particularly discloses an efficient viscosity-reducing warm mixing agent, a preparation method thereof and a warm-mixed asphalt mixture. The high-efficiency viscosity-reducing warm mixing agent is prepared from the following raw material components in percentage by mass: 10 to 15 percent of Ni-based expanded perlite, 35 to 45 percent of aliphatic amine modified vermiculite powder, 10 to 15 percent of acrylamide modified nano silicon dioxide, 3 to 5 percent of anti-aging agent and the balance of waste plastic. The efficient viscosity-reducing warm mixing agent provided by the invention not only can effectively reduce the mixing temperature of an asphalt mixture, but also can ensure that asphalt and aggregate have good adhesion performance under the mixing condition, energy consumption is reduced, meanwhile, release of harmful gas can be effectively reduced, and the adopted raw materials are low in cost and are suitable for industrial production. The problems that the low-temperature ductility of asphalt is poor due to addition of a warm mixing agent in the prior art, the crack resistance of an asphalt mixture is insufficient, and the preparation cost of the warm mixing agent is high are effectively solved.

The utility model relates to the field of sulfuric acid production, especially relates to a battery sulfuric acid production line, including diluter, carry out secondary mixing with desalted water after mixing concentrated sulfuric acid and battery sulfuric acid once, and output, cooler, its pipe course entrance connects the outlet of diluter, its pipe course export connects battery sulfuric acid storage tank with battery sulfuric acid inlet of diluter, its shell course is connected with cooling water. The utility model solves the problem that the graphite diluter is used in the existing battery sulfuric acid production process, and the graphite and sealing material are corroded by sulfuric acid and enter the sulfuric acid due to the nature and structure of the diluter, which affects the quality of the acid. At the same time, the traditional battery sulfuric acid production process adopts manual operation, which is complicated and not conducive to saving manpower and reducing labor cost.

The invention discloses a desulfurized rubber modified asphalt and a preparation method thereof. The asphalt of the invention comprises, by weight, 100 parts of petroleum asphalt, 25 to 35 parts of desulfurized rubber powder, 0.2 to 2 parts of an oxime sulfonate modifier, and 0.5 to 3 parts of a modified artificial zeolite; wherein the raw materials of the desulfurized rubber powder comprise waste rubber powder, calcium nitrate, aniline, 2,5-benzothiazole dithiol, p-methylphenyl magnesium bromide, diphenyl sulfoxide, and trimethylchlorosilane in a weight ratio of 80 to 100:10 to 20:20 to 30:5 to 10:5 to 6:1:3 to 4; the invention also discloses a specific preparation method of the desulfurized rubber powder; the asphalt of the invention has simple components, not only various properties are improved, but also the mixing temperature is low and the use is more convenient.