Rubber modified asphalt mixture and preparation and construction methods thereof

An asphalt mixture and rubber modification technology, which is applied in the engineering field, can solve the problems of incomplete compatibility between rubber particles and gravel aggregates or asphalt, volume expansion, and difficulty in compacting the mixture, so as to prolong the service life and improve Compactness, the effect of reducing compaction rutting

Active Publication Date: 2011-02-09
JIANGSU EASTTRANS INTELLIGENT CONTROL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with foreign countries, my country's research started late. The main problem of the dry process is that the rubber particles are not completely compatible with the crushed stone aggregate or asphalt, which makes the compaction of the mixture more difficult and prone to volume expansion after compaction.

Method used

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  • Rubber modified asphalt mixture and preparation and construction methods thereof
  • Rubber modified asphalt mixture and preparation and construction methods thereof
  • Rubber modified asphalt mixture and preparation and construction methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Material preparation:

[0029] Polyoctene rubber (TOR), purchased from Nanjing Huntington Trading Co., Ltd., the product specification is 25kg per bag, and it is subpackaged according to needs during implementation.

[0030] Waste tire rubber powder is made of waste truck tires with high natural rubber content. Its main components are rubber, carbon black, zinc oxide sulfur and sulfur additives. It is obtained through grinding and crushing. The particle size of rubber powder ranges from 0.075 to 4.75mm. What this embodiment uses is 30 mesh.

[0031] Asphalt is 70# road petroleum asphalt, which is the asphalt produced by Taizhou Plant of CNOOC in this embodiment.

[0032] Crushed stone aggregate, also known as aggregate. One of the main components of asphalt concrete, it mainly acts as a skeleton and reduces the volume change caused by the shrinkage and swelling of the cementitious material during the setting and hardening process, and is also used as a cheap filler...

Embodiment 2

[0044] 1. Material preparation:

[0045] Polyoctene rubber was purchased from Nanjing Huntington Trading Co., Ltd., and the product specification was 25kg per bag, which was subpackaged as needed during implementation.

[0046] Waste tire rubber powder is waste truck tires with high natural rubber content. Its main components are rubber, carbon black, zinc oxide sulfur and sulfur additives, which are obtained through grinding and crushing. Waste tire rubber powder obtained by crushing by freezing method is not allowed. , The particle size range of the rubber powder is less than or equal to 4.75mm, and the one used in this embodiment is 20 mesh.

[0047] The asphalt is 70# road petroleum asphalt produced by SK Korea.

[0048] Crushed stone aggregate, the stone used in this example is sieved crushed stone, and the crushed stone aggregate is classified according to the commonly used classification requirements. The classification used in this example is: 0-2.36mm, 2.36-4.75mm, ...

Embodiment 3

[0062] 1. Material preparation:

[0063] Polyoctene rubber was purchased from Nanjing Huntington Trading Co., Ltd., and the product specification was 25kg per bag, which was subpackaged as needed during implementation.

[0064] Waste tire rubber powder is waste truck tires with high natural rubber content. Its main components are rubber, carbon black, zinc oxide sulfur and sulfur additives, which are obtained through grinding and crushing. Waste tire rubber powder obtained by crushing by freezing method is not allowed. , the particle size range of the rubber powder is less than or equal to 4.75mm, and the one used in this embodiment is 40 mesh.

[0065] Asphalt, Shell 70# road petroleum asphalt is used.

[0066] Crushed stone aggregate, the stone used in this example is sieved crushed stone, and the crushed stone aggregate is classified according to the commonly used classification requirements. The classification used in this example is: 0-2.36mm, 2.36-4.75mm, For 4.75-9.5m...

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Abstract

The invention relates to a modified asphalt mixture and preparation and construction methods thereof, particularly relates to rubber modified asphalt and preparation and construction methods thereof and belongs to the technical field of engineering. The rubber modified asphalt and the methods solve the construction problem that the mixture is thick and sticky by adding trans-polyoctenamer rubber (TOR) into the asphalt mixture, further reduce the stirring temperature of the rubber asphalt mixture, reduce processing equipment, improve production process, and are favorable for preventing water damage by a design method of continuous dense gradation. The preparation process of the mixture improves the using performance of the rubber asphalt mixture. The rubber modified asphalt and the methodshave the advantages of promoting the comprehensive utilization of waste tires by paving asphalt pavements with waste rubber powder modified asphalt, reducing great environment stress brought by blackpollution, saving resources, improving the pavement performance of the asphalt mixture, improving the service quality of the pavement, prolonging the service life of the pavement, reducing cost, and improving performance of products. Compared with the conventional modified asphalt production process, the preparation and construction methods have the advantages of energy saving and environmental protection and are convenient for construction.

Description

technical field [0001] The invention relates to a modified asphalt mixture and its preparation and construction method, in particular to rubber modified asphalt and its preparation and construction method, which belongs to the field of engineering technology. Background technique [0002] The preparation of rubber-modified asphalt mixture is mainly divided into dry method and wet method. From the research and application of various states in the United States, the recommended method is the wet method. The gradation of crushed stone aggregates adopts intermittent gradation and Open grading, the amount of rubber powder is 5%-25% of the asphalt mass. Generally, continuous dense grading mixtures are not used. Adding a large amount of rubber powder in continuous dense grading will bring great difficulties to compaction due to the elasticity of rubber powder itself. If the compaction is not dense, it will cause road damage. Early damage, so that qualified asphalt concrete pavemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C19/02C04B26/26C04B24/26
Inventor 王捷李华王鹏赵锡娟
Owner JIANGSU EASTTRANS INTELLIGENT CONTROL TECH GRP CO LTD
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