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Waste rubber powder modified asphalt composition and preparation method thereof

A technology of asphalt composition and modified asphalt, which is applied in building structures, building components, building thermal insulation materials, etc., can solve the problems of small processing capacity, environmental pollution, complicated spraying process of waste rubber powder, etc., so as to reduce side reactions. The incidence of , the effect of broad application prospects

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The waste rubber powder spraying process of this method is complicated, and the processing capacity is small, and the subsequent solvent evaporation process produces a large amount of flammable and explosive gases and pollutes the environment, which limits its wide-scale application.

Method used

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  • Waste rubber powder modified asphalt composition and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The activation and grafting process of waste rubber powder in this embodiment.

[0035] The preparation process of activated waste rubber powder: dissolve 2 parts of potassium oleate and 1 part of sodium dodecylbenzenesulfonate in 100 parts of aqueous sodium hydroxide solution at 50±5°C and pH value of 10, stir well; then add Cut 40 parts of waste rubber powder at a speed of 2500-3000r / min for 60 minutes; dry the sheared emulsion in an oven at 60°C to obtain activated waste rubber powder, which is designated as rubber powder A.

[0036] The grafting process of activated waste rubber powder: Mix 90 parts of rubber powder A and 10 parts of polyethylene evenly and then add them to the twin-screw extruder. ℃, the intermediate temperature control point is between 90 and 110 ℃, the residence time is 2 minutes, and the extruded material is granulated. Then mix evenly with 2 parts of dithiotetramethylthiuram and 1 part of maleic anhydride and then add it to the twin-screw extr...

Embodiment 2

[0038] 564 grams (94%) of base asphalt with a penetration of 93 was heated and melted, and 36 grams (6%) of rubber powder A was added, and sheared at 170°C~175°C for 30 minutes to obtain waste rubber powder modified asphalt. The product properties are shown in Table 1.

Embodiment 3

[0040] 510 grams (59%) of base asphalt with a penetration of 197, after heating and melting, add 30 grams (15%) of aromatic oil, add 120 grams (20%) of rubber powder B, add 12 grams (5%) of polyethylene, add 6 grams (1%) of sulfur powder was sheared at 185°C to 190°C for 60 minutes to obtain waste rubber powder modified asphalt. The properties of the product are shown in Table 1.

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Abstract

The invention discloses a waste rubber powder modified asphalt composition and a preparation method thereof. The waste rubber powder modified asphalt composition comprises the following components in percentage by weight: 60-94 percent of basic asphalt and 6-20 percent of activated waste rubber powder. The preparation method comprises the following steps: adding the activated waste rubber powder into the melted basic asphalt for fully mixing to obtain the waste rubber powder modified asphalt composition. The asphalt composition disclosed by the invention is high in storage stability and low in cost, and the raw materials are easily available; the asphalt component has a wide application prospect in the fields of road engineering, waterproof coiled materials and the like.

Description

technical field [0001] The invention relates to a waste rubber powder modified asphalt composition and a preparation method thereof, in particular to use activated waste rubber powder as a main modifier to prepare a modified asphalt composition and improve the storage stability of the modified asphalt composition Methods. Background technique [0002] High-grade highways, especially highways, require asphalt materials used as binders to have excellent road performance: (1) temperature sensitivity requirements, the use environment of highway asphalt pavement requires asphalt to be harder in summer and not soft in winter. It is more flexible and not brittle; (2) High temperature performance requirements. In order to prevent permanent deformation such as rutting and pushing, there is a minimum requirement of 60°C viscosity and softening point for heavy traffic asphalt pavement. For heavy traffic sections, asphalt with lower penetration should be used; (3) Low-temperature p...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L21/00C08L23/06C08L23/08C08K3/06C08C19/00B29C47/92B29C48/92
Inventor 范思远张静陈保莲陈闯宁爱民李志军
Owner CHINA PETROLEUM & CHEM CORP
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