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Paving method of anti-freezing asphalt road

A technology of asphalt pavement and laying method, which is applied to roads, roads, road repair and other directions, can solve the problems of high energy consumption, heavy environmental pollution, high energy consumption, etc., achieve less production energy consumption and environmental pollution, reduce the difficulty of eradication, The effect of low compaction temperature

Inactive Publication Date: 2012-07-18
张延
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high construction temperature required by HMA, asphalt and aggregates need to be heated to a very high temperature during the production process, which not only consumes a lot of energy, but also emits a lot of waste gas and dust during the production and construction process , seriously affecting the surrounding environmental quality and the health of construction workers
How to retain the good performance characteristics of hot mix asphalt mixture and overcome its existing problems such as heavy environmental pollution, high energy consumption, and aging of asphalt has become the direction of everyone's efforts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Preparation of warm mix antifreeze asphalt binder

[0021] Take 2 parts by weight of Sasobit warm mix agent and 95 parts by weight of No. 90 ordinary asphalt, and mix them with a shear emulsifier at a speed of 400 RPM for 50 minutes at a temperature range of 100-120 ° C to obtain an asphalt binder Stir with hydrophobic expanded perlite for 50 minutes at a temperature range of 90-130°C using a 5000RPM shear emulsifier to prepare a warm-mix antifreeze asphalt binder;

[0022] 2) Preparation of warm mix antifreeze asphalt mixture

[0023] First of all, sieve the crushed stone and crushed gravel mixture, first use a 4.75mm sieve to remove the particles larger than 4.75mm, and then use a 2.36mm sieve to sieve the 2.36mm~4.75mm particles as coarse Aggregate, use particles smaller than 2.36mm as fine aggregate, take 300 parts by weight of coarse aggregate and 200 parts of fine aggregate, add 30 parts by weight of mineral powder at the same time, mix and heat to 140 °C, and...

Embodiment 2

[0029] 1) Preparation of warm mix antifreeze asphalt binder

[0030] Take 5 parts by weight of Sasobit warm mix agent and 85 parts by weight of No. 90 ordinary asphalt, and mix them with a shear emulsifier with a speed of 200 RPM in the temperature range of 100-120 ° C for 30 minutes, and the obtained asphalt binder Stir with hydrophobic expanded perlite at a temperature range of 90-130°C using a 2000RPM shear emulsifier for 40 minutes to prepare a warm-mix antifreeze asphalt binder;

[0031] 2) Preparation of warm mix antifreeze asphalt mixture

[0032] First of all, sieve the crushed stone and crushed gravel mixture, first use a 4.75mm sieve to remove the particles larger than 4.75mm, and then use a 2.36mm sieve to sieve the 2.36mm~4.75mm particles as coarse Aggregate, use particles smaller than 2.36mm as fine aggregate, take 300 parts by weight of coarse aggregate and 200 parts of fine aggregate, add 30 parts by weight of mineral powder at the same time, mix and heat to 10...

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PUM

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Abstract

The invention relates to a paving method of an anti-freezing asphalt road. the method is characterized by comprising the following steps of: 1) preparing a warmly-mixed anti-freezing asphalt binder material; 2) preparing a warmly-mixed anti-freezing asphalt mixture; and 3) paving and compacting the anti-freezing asphalt road, wherein the step 1) comprises the following substeps: agitating 2-5 parts by weight of Sasobit warm mixing agent and 85-95 parts by weight of common asphalt No.90 at 100-120 DEG C in the presence of a shearing emulsifying agent with a rotating speed of 200-400 RPM (Revolutions Per Minute) for 30-50 minutes; and agitating the obtained asphalt binder material and hydrophobic expanded perlite at 90-130 DEG C in the presence of a shearing emulsifying agent with a rotating speed of 2000-5000 RPM for 40-50 minutes, so as to finally obtain the warmly-mixed anti-freezing asphalt binder material. Accumulated snow on the surface layer of the paved road can be easily removed; and meanwhile, the road performance of the asphalt mixture is not reduced and the complicity of construction is not increased.

Description

technical field [0001] The invention relates to a laying method of an asphalt pavement, in particular to a laying method of a warm-mix antifreeze asphalt pavement. [0002] Background technique [0003] At present, energy conservation and emission reduction, environmental protection and sustainable development are hot issues of common concern to all countries in the world. Our country also regards resource conservation as a basic national policy. [0004] Hot mix has outstanding advantages and good road performance, which is the mainstream technology. However, there are also obvious shortcomings such as heavy environmental pollution, high energy consumption, and serious asphalt aging. Although the cold mix is ​​environmentally friendly, energy-saving, and the mix can be stored, its road performance cannot be compared with that of the hot mix. At present, most of the asphalt pavement basically adopts the traditional hot mix asphalt mixture HMA (HotMix Asphalt). Due ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/22E01C19/10C04B26/26
CPCY02A30/30
Inventor 张延
Owner 张延