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Preparation method of asphalt modified by waste tire rubber powder

A technology for modifying asphalt and waste tires, which is applied in building components, building insulation materials, construction, etc. It can solve the problems of poor compatibility between rubber powder and asphalt, easy segregation and poor dispersion of rubber powder and asphalt, and achieve compatibility Good performance, good road performance, good high temperature stability

Inactive Publication Date: 2016-12-07
仇颖超
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: Aiming at the disadvantages of the current rubber powder modified asphalt, the rubber powder and asphalt are prone to segregation due to the poor compatibility and poor dispersibility of the rubber powder and asphalt. Under the catalysis of ultraviolet light, it undergoes a substitution reaction with chlorine gas, and then reacts with sodium hydroxide solution to generate active groups on the surface of the asphalt, and then mixes waste tire powder with bleaching powder and deionized water to undergo an oxidation reaction to generate a large amount of activity on the surface of the rubber powder. group, then mix the activated asphalt with rubber powder, add sulfur as a stabilizer, and finally extrude to obtain waste tire rubber powder modified asphalt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] First weigh 300g of asphalt, add it to a three-necked flask with a stirrer, heat it up to 185°C to make it completely melt, start the agitator, adjust the speed to 300r / min, irradiate the three-necked flask with a UV lamp at a power of 200W, and stir Under the condition of irradiation with ultraviolet light, feed chlorine gas into the three-necked flask at a rate of 2 mL / min, and react for 45 minutes; after the reaction is completed, remove the ultraviolet lamp, stop feeding chlorine gas, and feed compressed Air until all the chlorine gas is replaced, then drop 100mL of 8% sodium hydroxide solution into the three-necked flask through the dropping funnel, after the addition is complete, heat and stir for 45min, then pour the asphalt in the three-necked flask into the mortar 300g of waste tire rubber powder and 30g of bleaching powder were weighed successively, poured into a three-necked flask filled with 1000mL of deionized water, and then transferred to a three-necked fl...

example 2

[0019] First, weigh 400g of asphalt, put it into a three-necked flask with a stirrer, heat up to 188°C to make it completely melt, start the agitator, adjust the speed to 400r / min, irradiate the three-necked flask with a UV lamp at a power of 210W, and stir Under the condition of irradiation with ultraviolet light, feed chlorine gas into the three-necked flask at a rate of 3 mL / min, and react for 52 minutes; after the reaction is completed, remove the ultraviolet lamp, stop feeding chlorine gas, and feed compressed Air until all the chlorine gas is replaced, then drop 130mL of 9% sodium hydroxide solution into the three-necked flask through the dropping funnel. 400g of waste tire rubber powder and 40g of bleaching powder were weighed in turn, poured into a three-necked flask filled with 1100mL of deionized water, and then transferred to a three-necked flask with a digital display, speed measurement, and constant temperature magnetic stirring In the container, adjust the temper...

example 3

[0022] First weigh 500g of asphalt, put it into a three-necked flask with a stirrer, heat it up to 190°C to make it completely melt, start the agitator, adjust the speed to 500r / min, irradiate the three-necked flask with a UV lamp at a power of 220W, and stir Under the condition of irradiation with ultraviolet light, feed chlorine gas into the three-necked flask at a rate of 4 mL / min, and react for 60 minutes; after the reaction is completed, remove the ultraviolet lamp, stop feeding chlorine gas, and feed compressed Air until all the chlorine gas is replaced, then drop 150mL of 10% sodium hydroxide solution into the three-necked flask through the dropping funnel. 500g of waste tire rubber powder and 50g of bleaching powder were weighed in turn, poured into a three-necked flask filled with 1200mL of deionized water, and then transferred to a three-necked flask with a digital display, speed measurement, and constant temperature magnetic stirring In the container, adjust the tem...

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Abstract

The invention discloses a preparation method of asphalt modified by waste tire rubber powder, and belongs to the technical field of modified asphalt preparation. The preparation method comprises the steps that firstly, asphalt is molten and subjected to a substitution reaction with chlorine under ultraviolet light catalysis; secondly, a reaction product reacts with a sodium hydroxide solution, so that active groups are generated on the surface of the asphalt; thirdly, the waste tire rubber powder and bleaching powder are mixed with deionized water to generate an oxidation reaction, and a large number of active groups are generated on the surface of the rubber powder; fourthly, the activated asphalt and the rubber powder are mixed to react, and sulphur is added to serve as a stabilizing agent; lastly, extrusion molding is conducted, and then the asphalt modified by the waste tire rubber powder is obtained. According to the preparation method, the preparation steps are simple; the rubber powder and the asphalt are activated, so that the active groups are generated on the surface of the asphalt; the rubber powder and the asphalt are chemically bonded in the preparing process, the compatibility is good, uniform dispersion is achieved, and no segregation phenomenon is generated between the rubber powder and the asphalt.

Description

technical field [0001] The invention relates to a preparation method of waste tire rubber powder modified asphalt, belonging to the technical field of modified asphalt preparation. Background technique [0002] Rubber powder modified asphalt is a kind of modified asphalt. It uses tire rubber powder as a modifier and adds other chemical additives to the asphalt. It modifies the asphalt through physical and chemical reactions, and finally forms a stable performance. New paving materials. With the development of my country's national economy, the growth rate of my country's car ownership is getting faster and faster, and a large number of waste tires have become a social nuisance. Making waste tires into rubber powder and modifying asphalt for use in the road industry is the main way to recycle and harmlessly utilize waste tires. And with the continuous innovation of road asphalt pavement technology, waste tire rubber powder modified asphalt pavement technology, as one of the...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L19/00C08K3/06B29C47/92B29C48/92
CPCC08L95/00B29C48/92B29C2948/9258B29C2948/92704C08L2201/08C08L2207/24C08L19/003C08K3/06
Inventor 仇颖超邹宇帆许洪祥
Owner 仇颖超
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