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Rubber modified asphalt material for road and its preparing method

A technology of rubber modification and asphalt materials, which is applied to building insulation materials, building components, buildings, etc., can solve the problems of insufficient modification effect and unstable asphalt dispersion state, and achieve the effect of increasing the softening point and reducing the dosage

Inactive Publication Date: 2002-08-21
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because its chemical structure and physical properties are quite different from those of asphalt, its dispersion state in asphalt is not stable, and its modification effect is not obvious enough.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 200g of SBR rubber is miscible with 800g of toluene, add 12g of organic grafts (a compound of methyl methacrylate and acrylic acid in a weight ratio of 100:100) and reflux at 110°C-115°C for 100 minutes, then add 3000g Normal 100 # Asphalt, after stirring evenly, exhaust the toluene solvent in the system under reduced pressure at 100°C-145°C to prepare a modified asphalt material with a rubber weight of 6.25%. Its main technical properties are: penetration (25°C 0.1mm): 93.2, ductility (5°C, 5cm / min, cm): 189, softening point (°C): 55.2, stone adhesion (level): 5.

Embodiment 2

[0048] 100g SBS rubber 40g SBR rubber is miscible with 860g toluene, add 9.0g organic grafts (a compound of methyl acrylate, maleic anhydride, acrylic acid in a weight ratio of 100:125:100) and heat at 110°C-115 Reflux reaction at ℃ for 100 minutes, then add 3000g of ordinary 70 # Asphalt, after mixing evenly, exhaust the toluene solvent in the system under reduced pressure at 100°C-145°C to prepare a modified asphalt material with a rubber weight of 4.46%. Its main technical properties are: penetration (25°C 0.1mm): 58.2, ductility (5°C, 5cm / min, cm): 30.8, softening point (°C): 75.2, stone adhesion (level): 5.

Embodiment 3

[0050] Drop into 1000g 70 in the reactor equipped with high-speed stirring # Asphalt, after heating the temperature to about 150°C, put in 45g of SBS rubber, stir at high speed for 30 minutes, and then put in 3g of organic graft (a compound of butyl methacrylate and maleic anhydride in a weight ratio of 100:125) , continue to stir and react for 35 minutes, and prepare a modified asphalt material with a rubber weight content of 4.3% by colloid mill grinding. Its main technical properties are: penetration (25°C 0.1mm): 63.2, ductility (5°C, 5cm / min, cm): 28.6, softening point (°C): 59.2, stone adhesion (grade): 5.

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PUM

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Abstract

The rubber modified asphalt material is produced through chemical mdofication with organic grafting material and / or crosslinking composition, the organic grafting material is organic unsaturated olefinic acid or its ester, acid anhydride or their mixture, and crosslinking composition is mixture of sulfurizing agent and sulfurizing assistant. One of the preparation process includes the first reaction of rubber solution and the added organic grafting material, mixing with asphalt and final additional of crosslinking composition; and the other one includes dispersing rubber into asphalt, and the subsequent addition of organic grafting material and crosslinking composition for reaction. The rubber modified asphalt has high performance or rubber consumption and stable dispersion of rubber in asphalt and may be used used in expressway and other important highway.

Description

technical field [0001] The invention relates to a rubber-modified asphalt material for roads and a preparation method thereof. technical background [0002] Traffic is an important factor restricting the development of national economy. With the rapid development of our country's national economy, the highway traffic also develops rapidly. In the past, the main material for laying roads in my country was ordinary road asphalt, which has the disadvantages of low-temperature embrittlement, high-temperature flow, poor adaptability to strain values, and poor fatigue resistance. Due to the long-term effect of water and moisture in the air on the road, the asphalt will decompose and lose its adhesion to sand and aggregates, making the service life of the road very short. At present, most foreign highways use modified asphalt as paving material. These modified asphalts have good durability, wear resistance, high temperature non-softening, and low te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08L95/00
Inventor 刘伟区廖兵梁肇军赵树录罗广建刘艳平杨志聪
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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