Processing process and formula of finished natural asphalt cementing agent

A technology of natural asphalt and processing technology, which is applied to building insulation materials, building components, buildings, etc., and can solve the problems of storage stability, modified asphalt index analysis, and natural asphalt performance changes without analysis, etc.

Active Publication Date: 2017-08-18
西咸新区众力沥青有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent 201610896252.6 "A Fine Grinding Modified Mixing Process for Rock Bitumen Fluid", which shears and grinds natural asphalt to more than 150 meshes. This patent does not analyze the indicators of modified asphalt after being glued with base asphalt
Chinese Patent No. CN201310430663.2 "A Vegetable Oil Modified Asphalt Composition and Its Preparation Method" obtains road asphalt that meets the requirements by adding vegetable oil as a dispersion of natural asphalt, and does not mention the problem of storage stability; while the Chinese Patent No. For CN201620180136.X "Nanoscale Macromolecule Natural Asphalt Grinding Machine", natural asphalt with a particle size of 2 microns can be obtained through the grinding machine invented by it at a temperature of 175-300°C, but the patent only mentions a crushing method of natural asphalt, Does not address how to use natural asphalt to produce finished asphalt mixture binder, and does not analyze the performance changes of the produced natural asphalt
In patent 200410021928.4, the 15°C ductility of natural asphalt modified by asphalt also decays by more than half, and the attenuation intensifies as the particle size of natural asphalt products increases

Method used

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  • Processing process and formula of finished natural asphalt cementing agent
  • Processing process and formula of finished natural asphalt cementing agent
  • Processing process and formula of finished natural asphalt cementing agent

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Rock asphalt with a bitumen content of 23% is crushed to obtain natural bitumen powder with a particle size of about 300 mesh. After screening and inspection, the particle size meets the 0.3mm sieve hole pass rate of 100%, and the 0.15mm sieve hole pass rate of 80%-90 %, 55%-60% of particles below 0.075mm pass rate, mix natural asphalt powder and oil slurry containing 1% surfactant by weight of natural asphalt powder in the reactor according to the ratio of 3:1, and the oil slurry The temperature is heated to 160°C, and the surfactant is preferably a mixture of alkoxy silane and polyether surfactant in a ratio of 10:1. Grind the above mixture to obtain a uniformly dispersed 8000-mesh micro-nano structure mixture, mix the micro-nano structure mixture with 90# road petroleum asphalt in a ratio of 1:2, add 5% furfural to extract the oil, and stir for half an hour Finally, add 3‰ sulfur stabilizer and continue to stir for 3 hours before pouring into the finished product tan...

Embodiment 2

[0026] The lake asphalt with a bitumen content of 52% is crushed to obtain natural bitumen powder with a particle size of about 300 mesh. After screening and inspection, it meets the 0.3mm sieve hole pass rate of 100%, the 0.15mm sieve hole pass rate of 80%-90%, and the 0.075mm sieve hole pass rate. The particle size requirement of the following particle passing rate is 55%-60%. Natural asphalt powder and rubber oil are mixed evenly in the reactor according to the ratio of 5:1. The ratio of natural asphalt powder containing 0.8% by weight in rubber oil is preferably 10:1. A mixture of alkoxy aluminum zirconates and polyether surfactants. Stir the mixture and heat it to 160°C. After grinding, a uniformly dispersed 165°C 6000-mesh micro-nano structure mixture is obtained. Mix the micro-nano structure mixture with 70# asphalt in a ratio of 1:1, and add 3% Furfural extraction oil: a mixture of dioctyl phthalate = 8:1. After stirring for half an hour, add 2‰ of sulfur stabilizer, c...

Embodiment 3

[0029]The lake asphalt with a bitumen content of 52% is crushed to obtain natural bitumen powder with a particle size of about 300 mesh. After screening and inspection, it meets the 0.3mm sieve hole pass rate of 100%, the 0.15mm sieve hole pass rate of 80%-90%, and the 0.075mm sieve hole pass rate of 80%-90%. The particle size requirement of the following particle passing rate is 55%-60%. Mix 300-mesh natural asphalt powder and soft asphalt in a ratio of 2:1 in the reactor. 1% by weight of asphalt is preferably a 10:1 surfactant of a mixture of alkoxy silicones and polyether-type surfactants, and after colloid milling, a uniformly dispersed 6000-mesh micro-nanostructure mixture is obtained, and the The micro-nano structure mixture and 90# asphalt are mixed evenly according to the ratio of 1:1, and 2% furfural is added to extract the oil: bis(2-ethylhexyl) phthalate = 9:1 mixture, after stirring for half an hour, Then add 1% sulfur stabilizer, continue to stir for 4 hours, and ...

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Abstract

The invention provides a processing process and a formula of a finished natural asphalt cementing agent, which finishes the history that natural asphalt can only be used as asphalt or an asphalt admixture. The finished natural asphalt cementing agent for asphalt admixture is prepared and can be stored for a long time and transported, and the problem of ductility loss in the natural asphalt application process is solved. Natural asphalt is crushed to be in the granularity of 300 meshes and added to an organic dispersant containing a surfactant in proportion to be dispersed into a flowable mixture, the mixture is ground into a micro-nano mixture in the granularity of 6,000 meshes or above, the micro-nano mixture is mixed with pavement petroleum asphalt in the proportion of (1:100)-(10:1), 1%-10% of a plasticizer and 1 per mill to 10 per mill of a stabilizer are added to the mixture, the mixture is stirred and reacts for 2-6 h, and the asphalt cementing agent for roads or buildings is obtained.

Description

technical field [0001] This patent relates to a process and formula for processing natural asphalt mined in nature into a finished cementing material for asphalt mixture that can be stored for a long time. Background technique [0002] Natural asphalt is a kind of asphalt-like substance in the natural state formed by natural petroleum resources through hundreds of millions of years of crustal movement under the action of high temperature, high pressure, oxidation, and catalysts. Since natural asphalt is formed in the crust, its components include In addition to asphalt, it also contains mineral components ranging from 10% to 80%. According to XRF analysis, it is found that the minerals are mainly composed of Ca, Si, Al, Fe, S, K and other elements. It is precisely because of the presence of mineral components that natural asphalt exhibits excellent high-temperature stability, so it plays an important role in heavy-duty road construction materials such as high-modulus asphal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L71/00C08L91/00C08K5/12C08K3/06
CPCC08L95/00C08L2205/03C08L71/00C08L91/00C08K3/06C08K5/12
Inventor 曾赟张庆新张彬张俊搏张玲张晓宏韩筱东
Owner 西咸新区众力沥青有限公司
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