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Method for grafting and activating powder rubber for modifying to pavement asphalt

A technology for powder rubber and municipal roads, applied in the field of comprehensive utilization of waste rubber products, can solve the problems that powder rubber and asphalt cannot be in a molten state, the temperature sensitivity is not improved, and asphalt cannot be completely modified, etc. Flying stones, good bonding, the effect of shortening the braking distance

Inactive Publication Date: 2009-08-05
TIANJIN YATENGDA RUBBER & PLASTIC PRODS DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the production of powdered rubber generally adopts the freezing method, that is, after the waste rubber products are deep-frozen with liquid nitrogen, the molecular structure of the body is destroyed and crushed. This method is very expensive and not easy to be widely used.
Others use the normal temperature method to mechanically crush and grind the waste rubber products at normal temperature. The diameter of the powdered rubber particles obtained by this method is between 30-40 mesh, the particles are relatively large, and the spray holes are easy to block during use. The mixing temperature used is low, and the mixing time is short. After mixing, the powdered rubber and asphalt cannot be in a molten state, and the asphalt cannot be completely modified. The sensitivity to temperature has not been greatly improved. The disadvantage of softening, therefore, powder rubber has not been well applied on municipal roads

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] One, the preparation of powder rubber;

[0050] After cutting and separating the waste rubber tires, crushing and grinding, the obtained powder rubber has a particle size of 30-40 mesh, which is powder rubber.

[0051] Two, the preparation of activated powder rubber;

[0052] 1. Ingredients according to the weight ratio of the following components

[0053] Softener - ethylene tar 4.2kg;

[0054] Anti-scorch agent - stearic acid 0.3kg;

[0055] Heat stabilizer - oleic acid, calcium oxide 0.6kg;

[0056] Activator - polyalkylphenol disulfide; 0.9kg

[0057] Powdered rubber 94.0kg

[0058] 2. Mix 100kg of the above components at a temperature of 140-160°C, mix and pulverize them through high-shear equipment until their properties reach tensile strength≧15Mpa and elongation at break≧500%. Promptly obtain 100kg activated powder rubber.

[0059] 3. Modification of asphalt for laying municipal roads with graft activated powder rubber;

[0060] Ingredients according to ...

Embodiment 2

[0078] One, the preparation of powder rubber;

[0079] After cutting and separating waste rubber products, they are crushed and ground, and the obtained powdered rubber particles have a diameter of 40-60 meshes, which is powdered rubber.

[0080] Two, the preparation of activated powder rubber;

[0081] 1. Ingredients according to the weight ratio of the following components

[0082] Softener—ethylene tar 7kg

[0083] Anti-scorch agent - stearic acid 0.4kg

[0084] Heat stabilizer - oleic acid, calcium oxide 0.5kg

[0085] Activator - polyalkylphenol disulfide 0.7kg

[0086] Powdered rubber 91.4kg

[0087] 2. Preparation method: 100kg of the above components are mixed and pulverized by high-shear equipment at a temperature of 140-160°C until the properties reach a tensile strength of 16Mpa and an elongation at break of 550%. 100kg activated powdered rubber.

[0088] 3. Modification of asphalt for laying municipal roads with graft activated powder rubber;

[0089] 1. In...

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Abstract

The invention discloses a synthetic utilizing method of waste rubber product to obtain grafted active modified tar, which comprises the following steps: grinding waste rubber product into 30-order powder rubber; blending 4-8% softening agent, 0.2-0.5% coking-proof agent, 0.3-0.6% heat stabilizer, 0.5-0.9% activator and 90-95% powder rubber to break chain through high-cutting equipment; obtaining activated powder rubber; stirring the compound of 10-25% activated powder rubber, 60-90% tar, 5-8% dissolving-increasing agent and 8-10% grafting agent through high-speed stirrer; obtaining the product.

Description

Technical field: [0001] The invention relates to a method for comprehensive utilization of waste rubber products. In particular, the method of modifying bitumen for laying municipal roads with graft activated powder rubber. Background technique: [0002] Petroleum asphalt has been used for laying roads for many years. Due to the temperature sensitivity of petroleum asphalt itself, its heat resistance and cold resistance are poor. When it is directly used for road construction, when the temperature is high in summer, The road surface is often softened due to the melting of petroleum asphalt; when the climate is cold in winter, the road surface is often brittle due to the poor cold resistance of petroleum asphalt. Therefore, when using petroleum asphalt to build roads, it is necessary to modify the petroleum asphalt to adapt to all-weather changes. [0003] Using powder rubber to modify asphalt to improve the performance of asphalt pavement has become a research hotspot in t...

Claims

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Application Information

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IPC IPC(8): C08J11/10C08L21/00E01C7/18
CPCY02W30/62
Inventor 郑宏祥张子宏杨涵刘新酉
Owner TIANJIN YATENGDA RUBBER & PLASTIC PRODS DEV
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