Preparation method for compound modified emulsified asphalt material and application thereof in porous pavements

A technology of emulsified asphalt and compound modification, which is applied in building insulation materials, building components, buildings, etc., can solve the problems of human harm, high cost, and energy consumption, and achieve no smoke emission, enhanced bending resistance, and improved viscosity. The effect of knot properties

Inactive Publication Date: 2019-01-18
JIANGSU SINOROAD TRANSPORTATION SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the pavement of permeable pavement adopts hot mix mixture. Currently, the commonly used modified emulsified asphalt is SBS, SBR or the composite modified emulsified asphalt of the two. During the co

Method used

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  • Preparation method for compound modified emulsified asphalt material and application thereof in porous pavements

Examples

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Example Embodiment

[0028] The invention discloses a method for preparing a composite modified emulsified asphalt material, which is characterized in that it comprises the following steps:

[0029] Mix 50-59 parts of emulsified asphalt, 5-45 parts of emulsified asphalt modified additives, 1-4.5 parts of styrene butadiene latex, and 0.1-1 parts of dispersant, and stir at 300r / min for 30 minutes to obtain the composite modified Emulsified asphalt material; the emulsified asphalt modified additive contains the following components:

[0030] 5-10 parts of polyphosphoric acid, 15-30 parts of thermoplastic polyurethane elastomer, 10-20 parts of styrene-butadiene block copolymer, 10-15 parts of non-ionic asphalt emulsifier, 45-80 parts of deionized water.

[0031] As a preferred solution, the hard segment of the thermoplastic polyurethane elastomer is one of aromatic isocyanate and aliphatic isocyanate, and the soft segment of the thermoplastic polyurethane elastomer is polyester polyol, polyether polyol, or a...

Example Embodiment

[0048] Example 1

[0049] Step 1. Heat 10 parts of polyphosphoric acid to 100-110°C and keep it warm;

[0050] Step 2. Heat 30 parts of thermoplastic polyether-isophorone diisocyanate type elastomer to 55-65°C and keep it warm, while heating 15 parts of styrene-butadiene block copolymer to 55-65°C and Insulation

[0051] Step 3. Add the thermoplastic polyether-isophorone diisocyanate elastomer and styrene-butadiene block copolymer obtained in step 2 to the polyphosphoric acid insulated in step 1, and heat to 105-115°C and keep it warm 2.5h to obtain a mixture of thermoplastic polyether-isophorone diisocyanate elastomer, styrene-butadiene block copolymer and polyphosphoric acid;

[0052] Step 4. After the mixture of step 3 is cooled to room temperature, add 12 parts of non-ionic asphalt emulsifier, then stir at 800r / min for 20 minutes, under the condition of continuous stirring, add 70 parts of deionized water, and continue stirring until the emulsion is uniform Formed and prepared e...

Example Embodiment

[0056] Example 2

[0057] Step 1. Heat 10 polyphosphoric acid to 100-110°C and keep it warm;

[0058] Step 2. Heat 30 parts of thermoplastic polyester-diphenylmethane diisocyanate type elastomer to 55-65°C and keep it warm; heat 10 parts of styrene-butadiene block copolymer to 55-65°C and Insulation

[0059] Step 3. The thermoplastic polyester-diphenylmethane diisocyanate type elastomer and styrene-butadiene block copolymer of step 2 are simultaneously added to the polyphosphoric acid insulated in step 1, and the temperature is raised to 105-115°C and kept warm 2.5h to obtain a mixture of thermoplastic polyester-diphenylmethane diisocyanate elastomer, styrene-butadiene block copolymer and polyphosphoric acid;

[0060] Step 4. After the mixture in step 3 is cooled to room temperature, add 12 parts of non-ionic asphalt emulsifier, then stir at 800r / min for 20 minutes, add 65 parts of deionized water under continuous stirring, and continue stirring until a uniform emulsion is formed. P...

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Abstract

The invention discloses a preparation method for a compound modified emulsified asphalt material and an application thereof in porous pavements and belongs to the technical field of road materials. The compound modified emulsified asphalt material is acquired by mixing 50-59 parts of porous pavement, 5-45 parts of emulsified asphalt modified additive, 1-4.5 parts of styrene-butadiene latex and 0.1-1 part of dispersing agent and then stirring for 30min at 300r/min. The emulsified asphalt modified additive contains the following components: 5-10 parts of polyphosphoric acid, 15-30 parts of thermoplastic polyurethane elastomer, 10-20 parts of styrene-butadiene segmented copolymer, 10-15 parts of nonionic asphalt emulsifier and 45-80 parts of deionized water. According to the invention, viscosity, softening point and 15 DEG C ductility of evaporated residue of modified emulsified asphalt can be effectively promoted; strength, abrasive resistance and low-temperature toughness of asphalt canbe promoted; brittle rupture can be prevented; after the compound modified emulsified asphalt is paved on a porous pavement, the porous pavement has the characteristics of high bonding strength and strong weather fastness; the compound modified emulsified asphalt material has an industry value.

Description

technical field [0001] The invention relates to the technical field of road materials, in particular to a composite modified emulsified asphalt material used in permeable pavement pavement. Background technique [0002] Emulsified asphalt is the road asphalt used at high temperature, which is evenly dispersed in water by chemical methods to form a liquid state, which can be used at room temperature, has good fluidity, simple construction technology, non-toxic and non-flammable. However, as the ambient temperature rises, after the emulsified asphalt solidifies, problems such as low cohesion, insufficient strength, and poor low-temperature toughness appear at high temperatures, which restrict the promotion and application of emulsified asphalt in asphalt pavement maintenance and repair. Modified emulsified asphalt not only has the characteristics of emulsified asphalt, but also has the advantages of modified materials. Polymer is an ideal modifier because of its excellent per...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L9/06C08L75/08C08L75/06C08L75/04C08L53/02C08K3/32C08K3/36
CPCC08K2003/329C08L95/00C08L2205/035C08L9/06C08L75/08C08L53/02C08K3/32C08K3/36C08L75/06C08L75/04
Inventor 詹从明关永胜陈香陈李峰张志祥崔传炜徐德根臧冬冬黄麒庞一朋刘杰
Owner JIANGSU SINOROAD TRANSPORTATION SCI & TECH CO LTD
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