Compound dual-modified asphalt mixture additive and preparation method thereof

A technology of modified asphalt and mixture, which is applied in building insulation materials, building components, buildings, etc. It can solve the problems of asphalt pavement high temperature stability and low rutting ability, complex modification process, and pollute the environment, so as to improve high temperature stability Excellent properties and low-temperature crack resistance, increased viscoelastic range, and anti-agglomeration effects

Active Publication Date: 2021-12-03
广西路冠科技投资发展有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high penetration and low softening point of the existing asphalt mixture, the high temperature stability and rutting ability of the asphalt pavement are low. In order to improve the performance of the asphalt mixture, SBS modifier is usually added for modification in the prior art, but Modification with SBS modifier is energy-intensive and pollutes the environment, and the modification process is complex. In addition, due to the compatibility of polymers and base asphalt, not all asphalts are suitable for polymer modification.

Method used

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  • Compound dual-modified asphalt mixture additive and preparation method thereof
  • Compound dual-modified asphalt mixture additive and preparation method thereof
  • Compound dual-modified asphalt mixture additive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A compound double-modified asphalt mixture additive, made of the following raw materials in weight percentage: rock asphalt 60%, chitosan 30%, silicon mineral powder 5%, gelatin 4.7%, mannitol 0.3%, the silicon Mineral powder is nano-scale and contains 97% silicon dioxide.

[0025] The preparation method of the compound double-modified asphalt mixture additive described above comprises the following steps:

[0026] (1) Carrying out ultrafine pulverization of rock asphalt for 13 minutes to obtain rock asphalt micropowder;

[0027] (2) dissolving the gelatin in water at 80°C that is 100 times its weight, and after the gelatin is dissolved, add mannitol and stir evenly to obtain a mixed solution;

[0028] (3) The mixed liquid is processed by high-pressure micro-jet, the conditions of high-pressure micro-jet: the pressure is 55MPa, the temperature is 70°C, and the time is 22min, to obtain the second mixed liquid;

[0029] (4) Spray the second mixed solution on the surface...

Embodiment 2

[0034] A compound double-modified asphalt mixture additive, made of the following raw materials in percentage by weight: rock asphalt 80%, chitin 6%, silica mineral powder 10%, gelatin 3%, mannitol 1.0%, the silica mineral The powder is nanoscale and contains 97% silicon dioxide.

[0035] The preparation method of the compound double-modified asphalt mixture additive described above comprises the following steps:

[0036] (1) Carrying out ultrafine pulverization of rock asphalt for 14 minutes to obtain rock asphalt micropowder;

[0037] (2) dissolving the gelatin in water at 70°C that is 80 times its weight, and after the gelatin is dissolved, add mannitol and stir evenly to obtain a mixed solution;

[0038] (3) The mixed solution is processed by high-pressure micro-jet, the conditions of high-pressure micro-jet: the pressure is 60MPa, the temperature is 66°C, and the time is 24min, to obtain the second mixed solution;

[0039] (4) Spray the second mixed solution on the surf...

Embodiment 3

[0043] A compound double-modified asphalt mixture additive, made of the following raw materials in weight percentage: rock asphalt 70%, alginic acid 16.5%, silica ore powder 7%, gelatin 6%, mannitol 0.5%, the silica ore The powder is nanoscale and contains 97% silicon dioxide.

[0044] The preparation method of the compound double-modified asphalt mixture additive described above comprises the following steps:

[0045] (1) Carry out rock asphalt ultrafine pulverization 16min, obtain rock asphalt micropowder;

[0046] (2) dissolving the gelatin in water at 65°C that is 85 times its weight, and after the gelatin is dissolved, add mannitol and stir evenly to obtain a mixed solution;

[0047] (3) The mixed solution is processed by high-pressure micro-jet, the conditions of high-pressure micro-jet: the pressure is 70MPa, the temperature is 62°C, and the time is 26min, to obtain the second mixed solution;

[0048] (4) Spray the second mixed solution on the surface of rock asphalt ...

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Abstract

The invention belongs to the technical field of engineering materials, and particularly relates to a compound dual-modified asphalt mixture additive. The compound dual-modified asphalt mixture additive is prepared from the following raw materials in percentage by weight: 60-80% of rock asphalt, 5-30% of natural polysaccharide, 5-10% of silicon ore powder, 3-8% of gelatin and 0.3-1.0% of mannitol. The invention also discloses a preparation method of the compound dual-modified asphalt mixture additive. The compound dual-modified asphalt mixture additive obtained by the invention can replace an SBS modifier, is energy-saving and environment-friendly, and has more excellent high-temperature stability, water stability, plastic deformation resistance, low-temperature crack resistance and rutting resistance.

Description

technical field [0001] The invention belongs to the technical field of engineering materials, and in particular relates to a compound double-modified asphalt mixture additive. Background technique [0002] Asphalt mixture is a composite material, mainly composed of asphalt, coarse aggregate, fine aggregate, mineral powder, and some polymers and wood cellulose are added; different structures are formed by mixing these materials with different qualities and quantities. And have different mechanical properties. According to the material composition and structure, asphalt mixture can be divided into continuous gradation and discontinuous gradation; The size of the diameter can be divided into extra-coarse type (nominal maximum particle size greater than 37.5mm), coarse-grained type (nominal maximum particle size 26.5mm or 31.5mm), medium-grained type (nominal maximum particle size 16mm or 19mm), fine-grained type (nominal maximum particle size 9.5mm or 13.2mm), sand type (nomi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L89/00C08L5/08C08L5/04C08K5/053C08K3/36
CPCC08L95/00C08K2201/011C08L2201/08C08L89/00C08L5/08C08K5/053C08K3/36C08L5/04
Inventor 盘力宁
Owner 广西路冠科技投资发展有限责任公司
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