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Modified asphalt composition and preparation method thereof

A technology of modified asphalt and composition, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the problems of limited, single modification, and no research on the synergistic effect of modifiers, so as to avoid agglomeration, improve Road performance and the effect of preventing structural chain breakage

Inactive Publication Date: 2019-02-22
HUNAN COMM POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the modification of asphalt in the prior art is limited to a single use of polymers, or a single use of non-polymers for modification, but this single modification is limited
The synergistic effect of modifiers with multiple modification mechanisms has not been studied so far

Method used

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  • Modified asphalt composition and preparation method thereof
  • Modified asphalt composition and preparation method thereof
  • Modified asphalt composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of raw material of modified asphalt composition is equipped as follows:

[0032] Styrene-butadiene-styrene block copolymer 4wt%;

[0033] Ethylene-vinyl acetate copolymer 0.12wt%;

[0034] Polystyrene 1wt%;

[0035] Melamine resin 1wt%;

[0036] Terpene resin 10wt%;

[0037] Transition metal oxide 4wt%;

[0038] Calcium carbonate 1wt%;

[0039] Base asphalt balance.

[0040] The preparation method of the modified asphalt composition mainly includes the following process steps: step 1, adding styrene-butadiene-styrene block copolymer into the reaction kettle for preheating and stirring, then adding transition metal oxide under stirring condition, keeping the temperature At 150°C±5°C, perform high-speed stirring for 60-250 minutes to obtain additive A; step 2, add a certain amount of base asphalt into the stirred reactor, and Under certain conditions, add additive A, and shear through a high-speed shear emulsifier for 60-120 minutes. When the viscosity of t...

Embodiment 2

[0042] A kind of raw material of modified asphalt composition is equipped as follows:

[0043] Styrene-butadiene-styrene block copolymer 2wt%;

[0044] Ethylene-vinyl acetate copolymer 0.4wt%;

[0045] Polystyrene 1wt%;

[0046] Melamine resin 2wt%;

[0047] Terpene resin 12wt%;

[0048] Transition metal oxide 5wt%;

[0049] Calcium carbonate 2wt%;

[0050] Base asphalt balance.

[0051]The preparation method of the modified asphalt composition mainly includes the following process steps: step 1, adding styrene-butadiene-styrene block copolymer into the reaction kettle for preheating and stirring, then adding transition metal oxide under stirring condition, keeping the temperature At 150°C±5°C, perform high-speed stirring for 60-250 minutes to obtain additive A; step 2, add a certain amount of base asphalt into the stirred reactor, add additive A under the condition of 175-185°C, and pass through high-speed The shearing emulsifier shears for 60-120 minutes. When the vis...

Embodiment 3

[0053] A kind of raw material of modified asphalt composition is equipped as follows:

[0054] Styrene-butadiene-styrene block copolymer 6wt%;

[0055] Ethylene-vinyl acetate copolymer 0.3wt%;

[0056] Polystyrene 3wt%;

[0057] Melamine resin 2wt%;

[0058] Terpene resin 14wt%;

[0059] Transition metal oxide 5wt%;

[0060] Calcium carbonate 1wt%;

[0061] Base asphalt balance.

[0062] The preparation method of the modified asphalt composition mainly includes the following process steps: step 1, adding styrene-butadiene-styrene block copolymer into the reaction kettle for preheating and stirring, then adding transition metal oxide under stirring condition, keeping the temperature At 150°C±5°C, perform high-speed stirring for 60-250 minutes to obtain additive A; step 2, add a certain amount of base asphalt into the stirred reactor, add additive A under the condition of 175-185°C, and pass through high-speed The shearing emulsifier shears for 60-120 minutes. When the vi...

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Abstract

The invention relates to a modified asphalt composition which comprises the following components in percentage by weight: 1-6% of a styrene-butadiene-styrene block copolymer, 0.1-0.4% of an ethylene-vinyl acetate copolymer, 1-3% of polystyrene, 1-2% of a melamine resin, 10-15% of a terpene resin, 1-5% of a transition metal oxide, 1-2% of calcium carbonate and the balance of matrix asphalt. According to the used addition modifier, structural chain fracture of a copolymer modifier under a rut load is avoided, and the dispersion morphology of a non-polymerized modifier in the asphalt body is promoted. The modified asphalt composition can maintain high strength and fatigue resistance while maintaining high elasticity of the asphalt.

Description

technical field [0001] The invention relates to an asphalt composition and a preparation method thereof, in particular to a modified asphalt composition for road surfaces and a preparation method thereof. Background technique [0002] Asphalt has good mineral adhesion and viscoelasticity and is widely used in paving roads. Seasonal changes have a great influence on the road performance of asphalt. When the temperature is high, the asphalt is easy to melt and flow. On the contrary, when the temperature is low, the asphalt is more likely to become brittle, which causes the asphalt to lose its fluidity. This property often makes the asphalt pavement rutting in summer, and the asphalt pavement shrinks and cracks in winter. With the rapid development of China's economy and the increase of road traffic volume, the traditional asphalt pavement can no longer meet the needs of development. Therefore, the asphalt is modified to improve and enhance its road performance to meet the ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L23/08C08L25/06C08L61/28C08K3/26C08K7/08C08K7/18
CPCC08K2003/265C08L95/00C08L2205/035C08L53/02C08L23/0853C08L25/06C08L61/28C08K3/26C08K7/08C08K7/18
Inventor 杨侣珍李振唐杰军吴敏之陈小薇
Owner HUNAN COMM POLYTECHNIC
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