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Preparation method of bagasse fiber for asphalt pavement reinforcement

A technology of bagasse fiber and asphalt pavement, which is applied in the field of highway engineering asphalt pavement material preparation, can solve the problems that bagasse fiber is easy to agglomerate, and the tensile breaking strength of bagasse fiber cannot meet the performance requirements of asphalt mixture, so as to achieve low raw material cost and high Good high temperature stability, thermal stability and oil absorption

Active Publication Date: 2018-11-06
CHANGAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the bagasse fiber produced by the existing bagasse fiber preparation method is easy to form agglomerates, and the length, aspect ratio, tensile breaking strength and other properties of the bagasse fiber cannot meet the performance requirements of the existing road asphalt mixture, and no There are reports on the application of bagasse fiber to asphalt mixture. The application of bagasse fiber to asphalt mixture is beneficial to improve the high temperature stability, low temperature crack resistance and fatigue resistance of asphalt pavement, and reduce the fatigue of existing fiber asphalt concrete pavement. construction cost

Method used

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  • Preparation method of bagasse fiber for asphalt pavement reinforcement
  • Preparation method of bagasse fiber for asphalt pavement reinforcement
  • Preparation method of bagasse fiber for asphalt pavement reinforcement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) a kind of preparation method of asphalt pavement reinforcement bagasse fiber may further comprise the steps:

[0043] Step 1, at room temperature, purify and remove the bagasse raw material, soak it in 5% sodium hydroxide solution for 22 hours, take out the bagasse, adjust the pH to 7 with 5% dilute hydrochloric acid, until the bagasse surface is saturated with water, add saturated water The polygalacturonan hydrolase with 2% of the total mass of bagasse is subjected to surface activation treatment for 4 hours, and then fished out until the bagasse is saturated and surface-dry to obtain dry bagasse.

[0044] Step 2, add sodium methylene bis-naphthalene sulfonate dispersant and 3% expanded perlite micropowder respectively accounting for 2% of the dry bagasse mass of the saturated surface to the dry bagasse of the saturated surface, and mix under the condition of 60 rpm After 4 minutes, the mixture was obtained.

[0045] Step 3: Add water 2.5 times the mass of dry ba...

Embodiment 2

[0049] (1) a kind of preparation method of asphalt pavement reinforcement bagasse fiber may further comprise the steps:

[0050] Step 1, at room temperature, purify and remove the bagasse raw material, soak it in 5% sodium hydroxide solution for 22 hours, take out the bagasse, adjust the pH to 7 with 5% dilute hydrochloric acid, until the surface of the bagasse is saturated with water, mix with The polygalacturonan hydrolase with 2% of the total mass of the bagasse in the water state is subjected to surface activation treatment for 4 hours, and then fished out to a saturated surface-dry state to obtain dry bagasse.

[0051] Step 2, add sodium methylene bis-naphthalene sulfonate dispersant and 3% expanded perlite micropowder respectively accounting for 2% of the dry bagasse mass of the saturated surface to the dry bagasse of the saturated surface, and mix under the condition of 60 rpm After 4 minutes, the mixture was obtained.

[0052] Step 3: Add water 2.5 times the mass of d...

Embodiment 3

[0056] Step 1, at room temperature, purify and remove the bagasse raw material, soak it in 5% sodium hydroxide solution for 22 hours, take out the bagasse, adjust the pH to 7 with 5% dilute hydrochloric acid, until the surface of the bagasse is saturated with water, mix with The polygalacturonan hydrolase with 2% of the total mass of the bagasse in the water state is subjected to surface activation treatment for 4 hours, and then fished out to a saturated surface-dry state to obtain dry bagasse.

[0057] Step 2, add sodium methylene bis-naphthalene sulfonate dispersant and 3% expanded perlite micropowder respectively accounting for 2% of the dry bagasse mass of the saturated surface to the dry bagasse of the saturated surface, and mix under the condition of 60 rpm After 4 minutes, the mixture was obtained.

[0058] Step 3: Add water 2.5 times the mass of dry bagasse on the saturated surface to the mixture, use a blade-type crushing high-speed disperser with a blade rotation sp...

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Abstract

The invention discloses a preparation method of bagasse fiber for asphalt pavement reinforcement. The method comprises the steps as follows: purifying a bagasse material, removing impurities, adding alkali liquor for soaking, taking out bagasse, and adjusting pH to obtain saturated bagasse; adding enzyme to the saturated bagasse for hydrolysis, taking the bagasse to obtain saturated surface dry bagasse; adding a chemical dispersant and an expanded perlite micropowder to the saturated surface dry bagasse, and performing mixing to obtain a mixture; adding water to the mixture and performing mechanical dispersion to obtain a mechanical dispersed substance; drying and screening the mechanical dispersed substance to obtain the bagasse fiber. The bagasse prepared with the preparation method hasthe length of 1-6 mm, the length-diameter ratio of 30-50 and the tensile and breaking strength of 300-600 MPa, and the thermal stability and oil absorbency of the bagasse fiber are good; the bagasse fiber is mixed in an asphalt mixture, the high-temperature stability, low-temperature crack resistance and fatigue crack resistance of the asphalt mixture can be remarkably improved, and the asphalt mixture is low in raw material cost, low-carbon and environmentally friendly.

Description

technical field [0001] The invention relates to the field of preparation of asphalt pavement materials for highway engineering, in particular to a preparation method of bagasse fibers for asphalt pavement reinforcement. Background technique [0002] Since the beginning of this century, my country's highway construction has developed rapidly and has achieved world-renowned achievements. The total mileage of expressways opened to traffic exceeded 130,000 kilometers, ranking first in the world. After that, my country's highways will enter a period of stable development in which both construction and maintenance are emphasized. Among the high-grade pavement structures built, asphalt pavement is the majority. Affected by climate environment and traffic load, asphalt pavement often suffers early damage, especially ruts and cracks. Fiber is widely used in civil engineering materials due to its characteristics of reinforcement, bridging, high strength, and durability. The incorporat...

Claims

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Application Information

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IPC IPC(8): C04B24/20C04B26/26
CPCC04B26/26C04B40/0039C04B2111/00017C04B2111/0075C04B18/248C04B22/062C04B22/122C04B24/20C04B14/185C04B18/141C04B14/02
Inventor 李祖仲熊剑平李斌张学磊姚新宇盛燕萍庞萧萧法春光宋瑞萌张杰
Owner CHANGAN UNIV
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