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A kind of asphalt mixture resistant to acid rain corrosion and preparation method thereof

A kind of asphalt mixture, acid rain resistance technology, applied in the field of new road engineering materials, can solve the problems affecting the durability of asphalt pavement, aggravate the deterioration speed of pavement material structure, etc., achieve good water stability, resist erosion and spalling, excellent high temperature The effect of stability

Active Publication Date: 2022-04-19
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The erosion and damage of acid rain on asphalt pavement involves complex chemical effects. Since asphalt pavement contains a large amount of acid-sensitive materials, the erosion of acid will aggravate the deterioration rate of pavement material structure, which will inevitably affect the durability of asphalt pavement.

Method used

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  • A kind of asphalt mixture resistant to acid rain corrosion and preparation method thereof
  • A kind of asphalt mixture resistant to acid rain corrosion and preparation method thereof
  • A kind of asphalt mixture resistant to acid rain corrosion and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A kind of preparation method of acid rain corrosion resistant asphalt mixture, comprises the following steps:

[0041] Step 1: Soak the bamboo fiber in the fiber modifier for 2 hours, then put it in an oven for 3 hours to fully react, the heating temperature is 110°C, rub the modified bamboo fiber twice to obtain the modified bamboo fiber, and set aside , the modified bamboo fiber is a modified short fiber floc made of bamboo stems, its length is 4-10mm, relative density is 0.87, moisture content<3%, oil absorption rate is 9 times of fiber quality; The fiber modifier is benzoic acid solution with a concentration of 0.3%. Its esterification effect on bamboo fiber can significantly improve its compatibility and dispersion uniformity in asphalt mixture;

[0042] Step 2: Preheat 100 parts of limestone aggregates in an oven and add them to the mixing pot. The preheating temperature is 180°C, the preheating time is 4 hours, and pre-mixed for 40 seconds, then add 2 parts of mo...

Embodiment 2

[0046] A kind of preparation method of acid rain corrosion resistant asphalt mixture, comprises the following steps:

[0047] Step 1: Soak the bamboo fiber in the fiber modifier for 2 hours, then put it in an oven for 3 hours to fully react, the heating temperature is 120°C, and rub the modified bamboo fiber twice to obtain the modified bamboo fiber, which is ready for use , the modified bamboo fiber is a modified short fiber floc made of bamboo stalk, its length is 4-10mm, relative density is 0.94, moisture content<3%, oil absorption rate is 8 times of fiber quality; The fiber modifier is benzoic acid solution with a concentration of 0.2%. Its esterification effect on bamboo fiber can significantly improve its compatibility and dispersion uniformity in asphalt mixture;

[0048] Step 2. Preheat 110 parts of limestone aggregates in an oven and add them to the mixing pot. The preheating temperature is 185°C, the preheating time is 4 hours, and pre-mixed for 50 seconds, then add ...

Embodiment 3

[0052] A kind of preparation method of acid rain corrosion resistant asphalt mixture, comprises the following steps:

[0053] Step 1, soak the bamboo fiber in the fiber modifier for 3 hours, then put it in an oven for 4 hours to fully react, the heating temperature is 120°C, rub the modified bamboo fiber twice to obtain the modified bamboo fiber, and set aside , the modified bamboo fiber is a modified short fiber floc made of bamboo stems, its length is 4-10mm, relative density 0.90, moisture content<3%, oil absorption rate is 9.5 times of fiber quality; The fiber modifier is benzoic acid solution with a concentration of 0.4%. Its esterification effect on bamboo fiber can significantly improve its compatibility and dispersion uniformity in asphalt mixture;

[0054] Step 2. Preheat 120 parts of limestone aggregates in an oven and add them to the mixing pot. The preheating temperature is 170°C, the preheating time is 4.5 hours, pre-mixed for 30 seconds, and then add 3.5 parts of...

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Abstract

The invention discloses an asphalt mixture resistant to acid rain corrosion, which belongs to the technical field of new road engineering materials, and comprises the following components: epoxy asphalt, modified bamboo fiber, waste rubber powder, limestone aggregate and limestone mineral powder. A method for preparing an acid rain-resistant asphalt mixture. The method uses an epoxy curing system, modified bamboo fiber and waste rubber powder to compositely fill the pores and cavities inside the asphalt mixture, and then play a role of wrapping and sealing, and the asphalt The mixture forms effective protection, retards the erosion of acid rain, and further protects the underlying layer, so that the adhesion, water stability and durability of asphalt-mineral materials are significantly improved, and the materials are widely available, environmentally friendly and non-toxic.

Description

technical field [0001] The invention belongs to the technical field of new materials for road engineering, and in particular relates to an asphalt mixture resistant to acid rain corrosion and a preparation method thereof. Background technique [0002] With the continuous development of my country's industrialization process, the burning of fossil fuels such as petroleum, coal and natural gas leads to SO 2 and NO X emissions increased rapidly. SO 2 and NO X After a series of complex physical and chemical reactions, the H 2 SO 4 and HNO 3 Such acidic droplets and acidic particles fall into the ground with atmospheric wet deposition and dry deposition. When the pH value in rain and snow is less than 5.6, it is called acid rain. [0003] my country is the third largest acid rain area in the world after Europe and North America, and among the three major acid rain areas, my country has the largest area of ​​strong acid rain (PH<4.5), and the southern and southwestern re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B111/23
CPCC04B26/26C04B2111/0075C04B2111/23C04B18/265C04B18/22C04B14/28
Inventor 刘克非蒋康夏超明周佳彭四龙
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY