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Modified asphalt, and preparation method and use thereof

A modified asphalt and modifier technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of large index changes and poor storage stability of rubber asphalt, and achieve high softening point, excellent elastic recovery, and long storage time long effect

Inactive Publication Date: 2012-06-13
SHANDONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But at present, there is the disadvantage of poor storage stability of rubber asphalt. When stored for a long time, the index changes greatly. It must be used up within two days, otherwise the segregation cannot be used.

Method used

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  • Modified asphalt, and preparation method and use thereof

Examples

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preparation example Construction

[0041] The preparation method of described modifying agent is further specifically as follows:

[0042] In the first step, the thermal polymerization initiator is mixed with a solvent accounting for 1 / 5-2 / 5 of the total volume of the solvent to prepare a thermal polymerization initiator solution;

[0043] In the second step, the styrene-butadiene-methyl methacrylate polymer and the polyol ester are stirred and mixed in a solvent accounting for 3 / 5-4 / 5 of the total volume of the solvent, and kept at 40°C-60°C, stirring for 1 hour-2 hours;

[0044] In the third step, the thermal polymerization initiator solution prepared in the first step is added dropwise to the mixed solution in the second step, and after the dropwise addition is completed, the stirring is continued for 4 hours to 8 hours, and finally the modifying agent is obtained.

[0045] With respect to 100 parts by weight of styrene-butadiene-methyl methacrylate polymer, the polyol ester is preferably 3 parts by weight ...

Embodiment 1

[0099] The preparation of embodiment 1 modifying agent

[0100] At room temperature, 10g of azobisisobutyronitrile and 10L of propylene glycol monomethyl ether are stirred and mixed to prepare a thermal polymerization initiator solution; subsequently, 1kg of styrene-butadiene-methylmethacrylate (Zibo Hai Chemical Industry Co., Ltd.) and 150g of pentaerythritol tetraacrylate (Nanjing Wangxu Chemical Co., Ltd.) were added to 40L of propylene glycol monomethyl ether, and stirred, and the temperature of the reactor was kept at about 50°C and stirred for 1 hour; The prepared thermal polymerization initiator was added dropwise to the reactor, during the process of dropping and during the stirring process after the dropwise addition, the temperature of the reactor was always kept at about 50°C, and after the dropwise addition was completed, it was stirred for 6 hours to obtain 1 kg of the present invention. required modifiers.

Embodiment 2

[0101] The preparation of embodiment 2 lignin

[0102] 1kg peanut shells are put into a stainless steel autoclave, then add 2L ethylene glycol solution (produced by Jinan Longjiang Chemical Co., Ltd.), 2L water and 50g p-toluenesulfonic acid catalyst (Zibo Like Chemical Co., Ltd.) successively, and heat up to Keep stirring at about 190°C for 2 hours, then cool down to 80°C, filter the reacted mixture, add 15L of cold water to the filtered solution, and stir for 2 hours, a precipitate occurs and precipitates, and the precipitate is filtered and frozen Dry to obtain 400g of lignin required by the present invention.

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Abstract

The invention provides modified asphalt. The modified asphalt comprises base asphalt, a modifying agent, a lignin stabilizing agent, maleic acid mono-lauryl La, rubber powder and a mineral filler, wherein the modifying agent is obtained by taking a styrene-butadiene-methyl methacrylate polymer as a base material and the lignin stabilizing agent is extracted by adopting an alcoholic solvent with high boiling point; and the modifying agent is prepared through the following method: under the action of a thermal polymerization initiator, the styrene-butadiene-methyl methacrylate polymer and reactive monomers are polymerized in a solvent, and then, the modifying agent is obtained. The modified asphalt has the advantages of high softening point, high extension degree, excellent elastic recovery, long storage time and high stability, when the modified asphalt is used in the process of road construction, the maintenance engineering for expressways of our country can be improved, the service lives of the expressways are prolonged, and the road level of service is improved.

Description

technical field [0001] The invention relates to the field of road construction, in particular to a modified asphalt used for road construction. Background technique [0002] With the rapid development of the automobile industry, the number of waste tires is also increasing year by year. The recycling and treatment of waste tires known as "black pollution" is a worldwide problem, and my country is facing increasing pressure. It is imminent to solve the black pollution and land occupation caused by the large accumulation of waste tires, protect the environment, and relieve the pressure of the country's resource shortage. [0003] Asphalt has been widely used as a bonding material in pavement engineering, and has many advantages such as convenient construction, reduced energy consumption, reduced pollution, and extended construction period. Therefore, the optimization and improvement of its performance in road paving has been continuously received in the industry. After decade...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L51/00C08L21/00C08L97/00C08K3/34C08K5/11C04B26/26
Inventor 刘欣赵玉凯
Owner SHANDONG UNIV OF SCI & TECH
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