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Durable asphalt based on low-grade asphalt and preparation method of durable asphalt

A low-grade, durable technology, applied to building components, building insulation materials, buildings, etc., can solve the problems of inability, poor thermal storage stability, and form stable structures to achieve good durability, excellent storage stability and Anti-aging performance, effect of reducing deformation

Inactive Publication Date: 2021-04-02
JIANGSU TIANNUO ROAD MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the asphalt durable agent is coupled by plasticizer copolymer, hydroxyl-terminated silicone, natural rubber powder, organic intercalation modified montmorillonite, calcined wollastonite powder, sodium lignosulfonate, carbon black powder and titanate The components include silicone cross-linking agent and cross-linking catalyst. The components in the added durability agent cannot form a stable structure in asphalt, and the thermal storage stability of the product is not good.

Method used

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  • Durable asphalt based on low-grade asphalt and preparation method of durable asphalt
  • Durable asphalt based on low-grade asphalt and preparation method of durable asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In parts by mass, heat and melt 89.7 parts of AH-30 asphalt, add 3 parts of anti-aging agent, stir and add 5 parts of 40-mesh waste rubber powder material, stir and mix at a high speed of 195°C for 2 hours, and the stirring speed is 3000rpm, Then cool down to 185°C, slowly add 2 parts of SBS at a shear rate of 3500rpm, cut for 40 minutes, keep the temperature at 185°C, cut for 40 minutes, add 0.3 parts of stabilizer, and then stir and develop at 185°C for 3 hours , that is, the main performance indicators of the obtained asphalt are shown in Table 1.

Embodiment 2

[0023] In parts by mass, heat 88.35 parts of AH-30 asphalt to 200°C, add 2 parts of anti-aging agent, then add 8 parts of 80-mesh waste rubber powder material, stir for 3 hours at a stirring speed of 3500rpm, and then cool down to 185°C , at a shear rate of 3000rpm, slowly add 1.5 parts of SBS to shear for 30 minutes, keep the temperature at 185°C, add 0.15 parts of stabilizer, shear for 30 minutes, and then stir and develop at 185°C for 3 hours. The main performance indicators of asphalt are shown in Table 1.

Embodiment 3

[0025] In parts by mass, heat 88.2 parts of AH-30 asphalt to 200°C, add 10 parts of 60-mesh waste rubber powder material, stir for 3 hours at a stirring speed of 3500rpm, then cool down to 185°C, and under the condition of a shear rate of 3000rpm , slowly add 1.5 parts of SBS to cut for 30 minutes, keep the temperature at 185°C, add 0.3 parts of NH4L stabilizer, cut for 30 minutes, and then stir and develop at 185°C for 3 hours. The main performance indicators of the obtained asphalt are shown in Table 1.

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Abstract

The invention relates to manufacturing of asphalt for road construction, and in particular, relates to durable asphalt based on low-grade asphalt and a preparation method of the durable asphalt. The durable asphalt based on low-grade asphalt. The durable asphalt comprises the following components in parts by mass: 68-91 parts of the low-grade asphalt, 5-20 parts of deoiled asphalt, 2-5 parts of anSBS modifier, 5-15 parts of rubber powder, 0.1-0.3 part of a stabilizing agent, and 0.5-4 parts of an anti-aging agent. The durable asphalt has good compatibility and compatibility with matrix asphalt, and the prepared durable asphalt has excellent storage stability and aging resistance and has better durability than common SBS modified asphalt; the low-grade asphalt is used as a raw material, sothat the modulus of the asphalt and a mixture thereof can be remarkably improved, the deformation of the asphalt mixture under the action of vehicle load is reduced, and the overall strength and durability of a pavement are improved.

Description

technical field [0001] The invention relates to the manufacture of asphalt for road construction, in particular to a durable asphalt based on low-grade asphalt and a preparation method thereof. [0002] technical background [0003] As the road load continues to increase, the traffic volume of heavy-duty trucks increases greatly. At the same time, in order to improve the service life of the tire, a higher tire pressure is adopted, and the ground contact pressure of the tire increases, so that many problems appear on the asphalt road surface, such as rutting and permanent deformation. , fatigue cracking, etc. The pavement is often damaged before reaching the design life, requiring major repairs. In order to improve the performance of asphalt pavement, long-life asphalt pavement has become an important research content. [0004] Permanent asphalt pavement requires that the upper layer of the pavement should have good anti-rutting ability and anti-wear ability, the middle laye...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L19/00C08L53/02C08K3/06C08K3/22C08K3/34
CPCC08L95/00C08K2003/2296C08L2201/08C08L2205/035C08L2205/025C08L19/003C08L53/02C08K3/06C08K3/22C08K3/346
Inventor 郭兆民李玉环
Owner JIANGSU TIANNUO ROAD MATERIAL TECH