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Direct-feeding type asphalt warm-mix modifier as well as preparation method and application thereof

A modifier and drop-in technology, applied in building insulation materials, building components, climate change adaptation, etc., can solve the problems of single type of warm-mix modified asphalt, complicated preparation process, secondary pollution, etc., and achieve low price, Simple preparation process and stable performance

Active Publication Date: 2012-04-11
SHANGHAI PUDONG ROAD & BRIDGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) There are many components, the preparation process is complicated, and the energy consumption is large
[0007] (2) During the preparation and application of warm mix agent, due to the volatilization of some components, secondary pollution is serious
[0008] (3) There is a single type of warm-mix modified asphalt, mostly for warm-mix modification of base asphalt mixture, or only one of warm-mix modified base asphalt, ordinary modified asphalt, epoxy asphalt, rubber asphalt and other mixtures or more

Method used

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  • Direct-feeding type asphalt warm-mix modifier as well as preparation method and application thereof
  • Direct-feeding type asphalt warm-mix modifier as well as preparation method and application thereof
  • Direct-feeding type asphalt warm-mix modifier as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 7000g of waste recycled polyethylene with an average molecular weight of 1000, 2800g of ethylene bis stearamide and 500g of waste clay (the particle size of the waste clay is 300 mesh) into a screw extruder at 152°C for extrusion, and then The strip cutting equipment is cold-drawn and sheared, and then the prepared warm-mix asphalt modifier particles (trade name "asphalt") are put into a mixing tank with a mineral material temperature of 155°C and mixed for 10 seconds , and then add base asphalt and mix for 25 seconds to prepare a warm mix base asphalt mixture.

Embodiment 2

[0034] Add 8000g of waste recycled polyethylene with an average molecular weight of 900, 2500g of ethylene bisstearamide and 600g of diatomite with a particle size of 500 mesh into a screw extruder at a temperature of 150°C, and then pass through a strand cutting equipment Cold drawing, shearing and granulation, and then put the prepared warm-mix asphalt modifier granules (the brand name is "asphalt") into the mixing tank with the mineral material temperature at 150°C, mix for 15 seconds, and then add The base asphalt was mixed for 30 seconds to prepare a warm mix base asphalt mixture.

Embodiment 3

[0036] 7500g of waste recycled polypropylene with an average molecular weight of 1100, 4000g of ethylene bis stearamide and a specific surface area of ​​800m 2 / g, 1000g of powdered activated carbon with a particle size range of 200nm was added to a screw extruder, extruded at a temperature of 150°C, and then cold-stretched and sheared by a strand pelletizing device, and then the prepared warm Mix asphalt modifier particles (the brand name is "Bitumen") into the mixing tank with a mineral material temperature of 140 ° C, stir for 10 seconds, add SBS modified asphalt (SBS modified asphalt is based on base asphalt, A certain proportion of SBS modifier is added, and the SBS is uniformly dispersed in the asphalt by shearing, stirring, etc. to form a SBS blended material), and mixed for 20 seconds to obtain a warm-mixed SBS modified asphalt mixture.

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Abstract

The invention belongs to the technical field of road engineering, and in particular relates to a direct-feeding type asphalt warm-mix modifier (trade mark name: Liyan). The modifier comprises the following components in parts by weight: 60-80 parts of waste regenerated plastic, 25-40 parts of organic lubricating agent and 5-15 parts of inorganic reinforcing agent. The preparation and use processes of the asphalt warm-mix modifier provided by the invention are simple and environmentally-friendly, and the prepared asphalt warm-mix modifier has stable property, long storage time, low energy consumption and obvious viscosity reduction effect and is suitable for warmly mixing and modifying various asphalt mixtures. The warm-mixing modifier is capable of effectively reducing the viscosity of asphalt while ensuring or modifying the construction and pavement performances of the asphalt mixtures, thereby realizing the purposes of reducing viscosity and temperature, saving energy and reducing consumption and reducing pollution in a true sense.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and in particular relates to an asphalt warm-mix modifier (trade name: Liyan) which can be directly injected in road engineering construction and its preparation method and application. Background technique [0002] Due to its low mixing and paving temperature, good construction and road performance, warm mix asphalt mixture has been more and more favored by asphalt road research, use and construction personnel in recent years. At present, four main types of warm mix technologies have been formed, including emulsified asphalt, foamed asphalt, asphalt mineral method and organic additives, which generally include two warm mix asphalt mixture technologies: ready-mixed and direct-injected. [0003] Ready-mixed warm-mix asphalt mixture technology mainly refers to adding compound warm-mix agent prepared from various original reagents or various original reagents directly into asphalt binder, a...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L25/06C08L23/12C08K5/20C08K5/103C08K3/04C08K3/34C08K7/06C08L95/00C04B26/26
CPCY02A30/30
Inventor 赫振华闫国杰李交刘钢夏庆宇邓国民徐韵淳王仕峰连萍胡睿马利志
Owner SHANGHAI PUDONG ROAD & BRIDGE GRP CO LTD
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