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Method for preparing asphalt pavement material by adopting waste concrete

A technology for waste concrete and asphalt pavements, which can be applied to cohesive pavements, roads, roads and other directions paved on site, which can solve the problems of waste of resources and achieve the effects of improving utilization, promoting ecological balance, and promoting the protection of natural environment

Inactive Publication Date: 2010-01-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The utilization rate of construction waste in some developed countries is generally 80% to 100%, while the utilization rate of construction waste in my country is less than 5%. A large amount of construction waste is disposed of as construction waste landfill, resulting in a great waste of resources.

Method used

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  • Method for preparing asphalt pavement material by adopting waste concrete
  • Method for preparing asphalt pavement material by adopting waste concrete
  • Method for preparing asphalt pavement material by adopting waste concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: Take the configuration of densely graded asphalt concrete mixture AC-25 as an example.

[0023] Asphalt: use road petroleum asphalt 70# provided by Hubei Ezhou Keshi Asphalt Material Co., Ltd., and its quality requirements meet the "Technical Specifications for Road Asphalt Pavement Construction" (JTG F40-2004);

[0024] Aggregate: The natural aggregate is taken from crushed stone obtained by crushing limestone, and the recycled aggregate is taken from the waste concrete produced by cement concrete road renovation. The original cement 42.5 grade ordinary cement was used, and the cement concrete label was C30. After crushing, the recycled aggregates 1#, 2# and 3# that meet the requirements are obtained, and the graded particle size of the natural aggregate and the recycled aggregate is the same;

[0025] Filler: Use finely ground cement mortar powder, dry at 105°C for 3 to 4 hours before use;

[0026] The preparation process of waste concrete recycled aggr...

Embodiment 2

[0028] Embodiment 2: Take the configuration of densely graded asphalt concrete mixture AC-20 as an example.

[0029] Asphalt: SBS modified asphalt provided by Hubei Ezhou Keshi Asphalt Material Co., Ltd. is used, and its quality requirements meet the "Technical Specifications for Highway Asphalt Pavement Construction" (JTG F40-2004);

[0030] Aggregate: The natural aggregate is taken from crushed stone obtained by crushing limestone, and the recycled aggregate is taken from the waste concrete produced by cement concrete road renovation. The original cement 42.5 grade ordinary cement was used, and the cement concrete label was C30. After crushing, the recycled aggregates 2# and 3# that meet the requirements are obtained, and the graded particle size of the natural aggregate and the recycled aggregate is the same;

[0031] Filler: Use finely ground cement mortar powder, dry at 105°C for 3 to 4 hours before use;

[0032] The preparation process of waste concrete recycled aggrega...

Embodiment 3

[0034] Embodiment 3: Take the configuration of ATB-25 asphalt stabilized gravel base course as an example.

[0035] Asphalt: use road petroleum asphalt 70# provided by Hubei Ezhou Keshi Asphalt Material Co., Ltd., and its quality requirements meet the "Technical Specifications for Road Asphalt Pavement Construction" (JTG F40-2004);

[0036] Aggregate: The natural aggregate is taken from crushed stone obtained by crushing limestone, and the recycled aggregate is taken from the waste concrete produced by cement concrete road renovation. The original cement 42.5 grade ordinary cement was used, and the cement concrete label was C30. After crushing, the recycled aggregates 1#, 2# and 3# that meet the requirements are obtained, and the graded particle size of the natural aggregate and the recycled aggregate is the same;

[0037] Filler: Use finely ground cement mortar powder, dry at 105°C for 3 to 4 hours before use;

[0038] The preparation process of waste concrete recycled aggre...

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Abstract

The invention relates to a method for preparing asphalt pavement material by adopting waste concrete. The method produces regenerative aggregate as asphalt pavement material by adopting waste concrete, and comprises the steps of waste concrete pretreatment, high temperature calcinating and grinding, cement mortar grinding and material mixing and stirring; regenerative coarse aggregate replaces natural aggregate with the proportion of 20 to 60 percent by weight, therefore combined aggregate with the temperature of 170 to 190 DEG C is obtained, asphalt at 145 to 165 DEG C is added and then stirred with cement mortar powder, and then the asphalt pavement material is obtained, and the contents of the combined aggregate, the asphalt and the cement mortar powder are 96 to 91 percent, 3 to 5 percent and 1 to 4 percent respectively. The method has the advantages that the waste concrete can be effectively utilized, the coarse aggregate can be recycled, the cement mortar powder can also be recycled, the mixture with the strength and the durability meeting pavement requirements is obtained, and great promotion effect can be produced for the resource recycling, the natural environment protection and the ecological equilibrium.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a method for preparing asphalt pavement materials from waste concrete. Background technique [0002] At present, the construction waste generated by construction in China is about 100 million tons per year, and the demolition of old buildings exceeds 500 million tons per year. Old city renovation, new city construction, and frequent renovations will generate a large amount of construction waste, including waste concrete blocks, mortar and concrete scattered during construction, broken bricks, metal, bamboo wood, and decoration waste, various packaging materials and other waste, among which concrete and mortar account for the largest proportion, accounting for about 30% to 50% of the total. Reasonable recycling and recycling of waste concrete and mortar is conducive to the sustainable development of resources and environmental protection. The utilization rate of construction wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26E01C7/08C04B18/16
Inventor 吴少鹏张涛陈美祝庞凌林振华刘杰胜王虹刘至飞张园王金刚米轶轩张吉哲钟进军
Owner WUHAN UNIV OF TECH
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