A kind of modified bamboo fiber asphalt mixture and preparation method thereof

A technology for asphalt mixture and asphalt binder, which is applied in the field of road engineering materials, can solve the problems affecting the durability of asphalt mixture, the difference in interface compatibility and dispersion uniformity, and the limited use range, and achieves low cost, hydrophobicity and other problems. Enhanced performance, simple and easy-to-operate preparation method

Active Publication Date: 2021-08-10
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkali solution treatment of plant fiber can improve its tensile strength and bond strength, but compared with esterification treatment of plant fiber, the interfacial compatibility and dispersion uniformity between it and asphalt mixture are much different, thus affecting the asphalt mixture. Durability, its range of use (especially in areas with harsh climates) is limited

Method used

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  • A kind of modified bamboo fiber asphalt mixture and preparation method thereof
  • A kind of modified bamboo fiber asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method for modified bamboo fiber asphalt mixture, comprising the following steps:

[0027] Step 1, soaking the bamboo fibers in a 0.2% benzoic acid solution for 100 minutes, placing the treated bamboo fibers in an oven at 110°C for 3 hours to fully carry out the modification reaction, and placing the modified bamboo fibers The fiber is rubbed and milled for the second time to obtain the modified bamboo fiber, which is set aside;

[0028] Step 2: Preheat the coarse and fine aggregates in the AC-type asphalt mixture in an oven at 170°C for 4 hours, then move them to a mixing pot at 170°C for 40 seconds, and then mix the modified bamboo fiber prepared in step 1 After mixing with the pre-mixed aggregate, dry mix for 80s to obtain asphalt binder;

[0029] Step 3: Preheat the asphalt binder prepared in step 2 to 150°C and add it to the mixing pot for wet mixing for 80s, then add mineral powder preheated to 150°C and mix for 80s to prepare AC-type modified bambo...

Embodiment 2

[0032] Step 1, soaking the bamboo fiber in a 0.3% benzoic acid solution for 120 minutes, placing the treated bamboo fiber in an oven at 115°C for 2.5 hours to fully carry out the modification reaction. Bamboo fibers are rubbed and milled for the second time to obtain modified bamboo fibers for subsequent use;

[0033] Step 2: Preheat the coarse and fine aggregates in the AC-type asphalt mixture in an oven at 175°C for 4.5 hours, then move them to a mixing pot at 175°C for pre-mixing for 50 seconds, and then mix the modified bamboo aggregates prepared in step 1 After the fiber is mixed with the pre-mixed aggregate, it is dry-mixed for 80 seconds to obtain the asphalt binder;

[0034] Step 3: Preheat the asphalt binder prepared in step 2 to 155°C and add it to the mixing pot for wet mixing for 80s, then add mineral powder preheated to 155°C and mix for 80s to prepare AC-type modified bamboo fiber asphalt Mixture.

[0035] In embodiment 2, the modified bamboo fiber length that ...

Embodiment 3

[0037] Step 1, placing the bamboo fiber in a benzoic acid solution with a concentration of 0.4% and soaking it for 140 minutes, placing the treated bamboo fiber in an oven at 120°C for 3.5 hours to fully carry out the modification reaction, and placing the modified bamboo fiber Bamboo fibers are rubbed and milled for the second time to obtain modified bamboo fibers for subsequent use;

[0038] Step 2: Preheat the coarse and fine aggregates in the AC-type asphalt mixture in an oven at 170°C for 5 hours, then move them to a mixing pot at 170°C for pre-mixing for 60 seconds, and then mix the modified bamboo fiber prepared in step 1 Mix with the pre-mixed aggregate and dry mix for 100s to obtain asphalt binder;

[0039]Step 3: preheat the asphalt binder prepared in step 2 to 160°C and add it to the mixing pot for wet mixing for 100s, then add mineral powder preheated to 160°C and mix for 100s to prepare AC-type modified bamboo fiber asphalt Mixture.

[0040] In embodiment 3, the...

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Abstract

The invention discloses a modified bamboo fiber asphalt mixture, which comprises the following raw materials: modified bamboo fiber and asphalt mixture. The invention also discloses a preparation method of the modified bamboo fiber asphalt mixture. In the method, the esterified bamboo fiber is added into the asphalt mixture and mixed evenly to make the high temperature stability, low temperature crack resistance, The water stability and durability are significantly improved, and the raw materials are cheap and easy to obtain, low in cost, environmentally friendly and non-toxic, and the preparation method is simple, and has significant social and economic benefits and popularization and application value.

Description

technical field [0001] The invention belongs to the technical field of road engineering materials, in particular to a modified bamboo fiber asphalt mixture and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy, the phenomenon of large-scale and overloaded transport vehicles is increasing day by day. In order to meet the increasing demands of heavy-duty traffic on the pavement performance of asphalt pavement, adding fiber to asphalt mixture to improve its pavement performance has been widely recognized. The asphalt mixture is mainly composed of coarse and fine aggregates and mineral powder. After the fiber is mixed into the asphalt mixture, it can effectively improve the asphalt mixture because it can play the role of reinforcement, adsorption, dispersion, stabilization, and viscosity increase. It is widely used in various aspects of performance. At present, there are three types of fibers widely used in asphalt m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B20/02
Inventor 刘克非蒋康张雪飞吴庆定叶泳
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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