Composite-waste-rubber-powder-particle modified asphalt mixture capable of being stored stably and preparation method thereof

A technology of modified asphalt and waste rubber powder, which is applied in building thermal insulation materials, building components, buildings, etc., can solve problems such as poor combination of rubber powder and asphalt interface, asphalt overflow, and increase the cost of modified asphalt.

Active Publication Date: 2015-06-10
TIANJIN HI TECH ENVIRONMENT DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The interface between rubber powder and asphalt is not well bonded, resulting in layering and segregation of rubber powder and asphalt
[0006] (2) During the heat storage process of rubber powder modified asphalt, the softening point of modified asphalt and other indicators are attenuated due to the continuous degradation of rubber powder
This method uses an aqueous ...

Method used

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  • Composite-waste-rubber-powder-particle modified asphalt mixture capable of being stored stably and preparation method thereof
  • Composite-waste-rubber-powder-particle modified asphalt mixture capable of being stored stably and preparation method thereof
  • Composite-waste-rubber-powder-particle modified asphalt mixture capable of being stored stably and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Pretreat 5-mesh rubber powder, softening oil, and activator in a high-speed mixer at 70°C for 15 minutes according to the weight ratio of 100:5:2, and add them to the first-stage twin-screw extruder. The die extrudes highly desulfurized reclaimed rubber. Subsequently, the highly desulfurized reclaimed rubber is metered into the second-stage single-screw extruder through the connector, and the feeding speed of the hopper is adjusted according to the weight ratio of highly desulfurized reclaimed rubber, 40-mesh rubber powder, and crosslinking agent to 80:20:0.1 40-mesh rubber powder, uniformly mixed, extruded, and water-cooled granulated to prepare composite rubber powder particles. Weigh 30% composite rubber powder particles according to the weight ratio of the base asphalt, add it to the base asphalt and stir rapidly for 15 minutes, then add 0.4% stabilizer after stirring, use a colloid mill to grind once (10 minutes), and incubate at 170-175°C After 4 hours, the modif...

Embodiment 2

[0045] Pretreat rubber powder, softening oil, and activator in a high-speed mixer at 70°C for 15 minutes according to the weight ratio of 100:10:1, and add them to the first-stage twin-screw extruder. Extrude highly desulfurized reclaimed rubber. Subsequently, the highly desulfurized reclaimed rubber is metered into the second-stage single-screw extruder through the connector, and the feeding speed of the hopper is adjusted at the same time according to the weight ratio of highly desulfurized reclaimed rubber, 40 mesh rubber powder, and crosslinking agent is 70:30:0.3 40-mesh rubber powder and cross-linking agent are uniformly mixed, extruded, and water-cooled granulated to prepare composite rubber powder particles. Weigh 30.1% composite rubber powder particles according to the weight ratio of the base asphalt, add it to the base asphalt and stir rapidly for 15 minutes, then add 0.4% stabilizer after stirring, use a colloid mill to grind once (10 minutes), and incubate at 170-...

Embodiment 3

[0047] Pretreat rubber powder, softening oil, and activator in a high-speed mixer at 70°C for 15 minutes according to the weight ratio of 100:15:3, and then add them to the first-stage twin-screw extruder. Extrude highly desulfurized reclaimed rubber. Subsequently, the highly desulfurized reclaimed rubber is metered into the second-stage single-screw extruder through the connector, and the feeding speed of the hopper is adjusted at the same time according to the weight ratio of highly desulfurized reclaimed rubber, 40 mesh rubber powder, and crosslinking agent is 60:40:0.5 40-mesh rubber powder and cross-linking agent are uniformly mixed, extruded, and water-cooled granulated to prepare composite rubber powder particles. Weigh 30.2% composite rubber powder particles according to the weight ratio of the base asphalt, add it to the base asphalt and stir rapidly for 15 minutes, then add 0.4% stabilizer after stirring, use a colloid mill to grind once (10 minutes), and incubate at...

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Abstract

The invention relates to a composite-waste-rubber-powder-particle modified asphalt mixture capable of being stored stably and a preparation method thereof. The preparation method comprises the steps of firstly carrying out deep-desulfurization degradation on low-mesh rubber powder so as to prepare high-desulfurization-degree reclaimed rubber, then, mixing high-mesh rubber powder, the high-desulfurization-degree reclaimed rubber and a small amount of cross-linking agent according to a certain ratio so as to prepare composite waste-rubber-powder particles, then, mixing the composite waste-rubber-powder particles and matrix asphalt, so as to prepare modified asphalt, and mixing the modified asphalt and aggregate, thereby preparing the modified asphalt mixture. According to the composite waste-rubber-powder particles, linear macromolecules in the high-desulfurization-degree reclaimed rubber are uniformly attached to the surface of the rubber powder, and meanwhile, a linear macromolecule-cross-linked structured core-shell structure is formed by using the micro-crosslinking action of the cross-linking agent. Due to the structure, a large number of linear molecules can intermesh in asphalt, and then, a stable rubber powder-asphalt mesh structure is formed, so that the aim of preparing the stably-stored rubber powder modified asphalt mixture is achieved.

Description

technical field [0001] The invention relates to a composite waste rubber powder particle modified asphalt mixture and a preparation method thereof, belonging to the field of waste rubber recycling and utilization. Background technique [0002] Polymer modified asphalt and polymer modified asphalt mixture are recognized as excellent pavement materials because of their excellent high and low temperature performance, and waste rubber powder modified asphalt is a research hotspot in recent years. There have been many years of paving roads with rubber powder modified asphalt mixture at home and abroad. Especially the successful practice in the United States shows that the waste rubber powder modified asphalt pavement is half thinner than the pure asphalt pavement, but its service life is doubled, which can improve the heat resistance and cold resistance of the pavement, and can reduce noise and prevent wet skid , Crushed ice and snow, improve safety factor, especially low price....

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L21/00C08L53/02C08L91/00C08L51/06C08L23/08C08L23/06C08L23/16C08L23/30C08K3/06C08K3/22C08J3/24B29C47/92B29C48/92
Inventor 江宽董大伟陈俊峰马庆杰刘双旺
Owner TIANJIN HI TECH ENVIRONMENT DEV CO LTD
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