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Novel bone glue modified asphalt and preparation method thereof

A technology of modified asphalt and bone glue, applied in building components, building insulation materials, buildings, etc., can solve the problems of poor fatigue performance of modified asphalt, heavy burden of road construction, complicated preparation process, etc., to reduce the phase angle, improve the Low temperature crack resistance, simple equipment requirements

Active Publication Date: 2021-08-27
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Propose a kind of rubber and SBS modified asphalt composition in CN106633964B, this composition improves asphalt storage problem, reduces asphalt viscosity, improves construction performance, but this technical preparation process is complicated, the fatigue performance of modified asphalt is relatively poor, restricts its application
CN108395711B proposes a mesoporous molecular sieve modified by chlorosilane and disodium tetrasulfide to modify asphalt, improve the anti-aging performance of matrix asphalt, and no toxic gas is emitted during the preparation process. This technology is only for short-term film oven thermal oxygen Aging, no long-term aging and UV aging data, affecting its promotion and use
In addition, all polymer modifiers are derived from petrochemical products, and their high prices impose a heavy burden on road construction

Method used

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  • Novel bone glue modified asphalt and preparation method thereof
  • Novel bone glue modified asphalt and preparation method thereof
  • Novel bone glue modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Cellulose reinforced BG-DOPA / Zn 2+ Preparation of materials:

[0034] After fully mixing 80g of BG and 160g of deionized water, add 7g of mixed alkali (4gNaOH+3gNa 2 CO 3 ) and continue to stir for 30 minutes; then add 15gDOPA, 1.5gNHS, 2.0gEDC for ultrasonic dispersion for 30min, and put the mixture into a water bath at 100°C after uniform dispersion, and continue to stir for 24h; add 4.2g ZnCl to the mixture 2 and 6g chitosan, continue to stir in a water bath at 100°C for 60min to obtain BG-DOPA / Zn 2+ Compound; 10 g of cellulose was added to BG-DOPA / Zn 2+ Among the compounds, cellulose-enhanced BG-DOPA / Zn was prepared by ultrasonic dispersion 2+ Material.

[0035] 2) Preparation of Bone Glue Modified Asphalt

[0036] Weigh 150g International 70 # Put road petroleum asphalt in a water bath at 140°C, and add 10g of cellulose-reinforced BG-DOPA / Zn in batches when it is heated to a molten state 2+ The materials were manually stirred until no obvious air bubbles...

Embodiment 2

[0038] 1) Cellulose reinforced BG-DOPA / Zn 2+ Preparation of materials:

[0039]After fully mixing 100g BG and 220g deionized water, add 9g mixed alkali (4gKOH+5g K 2 CO 3 ) and continue to stir for 30 minutes; then add 18gDOPA, 1.5gNHS, 2.0gEDC for ultrasonic dispersion for 30min, put the mixture into a water bath at 100°C after uniform dispersion, and continue to stir for 24h; add 5.5gZnSO to the mixture 4 and 7.5g chitosan, continue to stir in a water bath at 100°C for 60min to obtain BG-DOPA / Zn 2+ Compound; 18 g of cellulose was added to BG-DOPA / Zn 2+ Among the compounds, cellulose-enhanced BG-DOPA / Zn was prepared by ultrasonic dispersion 2+ Material.

[0040] 2) Preparation of Bone Glue Modified Asphalt

[0041] Weigh 150g International 70 # Put road petroleum asphalt in a 140°C water bath, and add 8.5g of cellulose-reinforced BG-DOPA / Zn in batches when it is heated to a molten state 2+ The materials were manually stirred until no obvious air bubbles were generated...

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Abstract

The invention belongs to the technical field of modified asphalt, and particularly relates to novel bone glue modified asphalt and a preparation method thereof. The raw materials of the modified asphalt comprise the following components: matrix asphalt, bone glue (BG), dopamine (DOPA), mixed alkali, chitosan, zinc salt, cellulose and diethyl phthalate (DEP). According to the adhesion mechanism of mussel molecules, active group carboxyl (-COOH) in BG and amino (-NH2) in DOPA are subjected to a condensation modification reaction and then subjected to a coordination reaction with Zn<2+> in zinc salt to form a stable five-membered ring network BG-DOPA / Zn<2+> compound, and cellulose is added to prepare the cellulose enhanced BG-DOPA / Zn<2+> material. The cellulose enhanced BG-DOPA / Zn<2+> material is added into the matrix asphalt, so that the complex modulus of the matrix asphalt is increased, the phase angle of the asphalt is reduced, and the low-temperature crack resistance, rheological property, permanent deformation resistance and rutting resistance of the matrix asphalt are improved.

Description

technical field [0001] The invention belongs to the technical field of modified asphalt, and in particular relates to a novel bone glue modified asphalt and a preparation method thereof. Background technique [0002] Asphalt pavement has the advantages of good flatness, low noise, and convenient maintenance, and has become the main structural form of high-quality pavement in my country. However, under long-term repeated loads of vehicles and harsh external environmental conditions, damage modes such as subsidence, cracking, water damage, rutting, and low-temperature shrinkage cracking will appear on asphalt pavement, which are likely to have adverse effects on driving safety and pavement service life. Therefore, how to solve the above problems, prolong the service life of roads, improve road safety and realize high-performance asphalt pavement has always been a research hotspot. [0003] Previous studies have found that the use of polymers such as rubber, SBS, and styrene-b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L89/00C08L5/08C08L1/02C08K3/16C08K3/30C08K5/17
CPCC08L95/00C08K2003/168C08K2003/3045C08L2205/035C08L89/00C08L5/08C08L1/02C08K3/16C08K3/30C08K5/17
Inventor 王天舒史晓萍
Owner SHANDONG JIAOTONG UNIV
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