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Recycled cement concrete prepared by recycling waste asphalt, and preparation method and application thereof

A technology for waste asphalt and recycled cement, which is applied in solid waste management, climate change adaptation, sustainable waste treatment, etc. Corrosion and frost resistance, weight reduction, improved workability

Active Publication Date: 2021-12-21
山西交通养护集团有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Asphalt pavement accounts for more than 80% of the roads that have been built in my country, and most of them have entered the stage of major and medium repairs. The main treatment methods are: waste landfill, thermal regeneration or cold regeneration. Deficiencies in energy efficiency and low utilization
[0003] If the asphalt pavement regeneration technology can be used for road maintenance and repair, not only can the original pavement materials be recycled, protect the environment, reduce the construction cost, but also can correct the defects of the original pavement materials and transform the original road surface However, the existing asphalt pavement regeneration technology has defects such as complex process, high cost, large amount of dust and poor environmental protection performance, which is also the main reason why it is not widely used

Method used

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  • Recycled cement concrete prepared by recycling waste asphalt, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A regenerated cement concrete for reuse of waste asphalt, comprising A component, B component, C component, D component and E component, and the mass ratio of each component is: A component is 13-20 60-80 parts for component B, 25-35 parts for component C, 1.28-1.98 parts for component D, and 5-8 parts for component E.

[0037] in:

[0038] Component A is composed of cement, a cementitious material, and a reinforcing and toughening material, and its mass ratio is: 12.888-19.886 parts of cement, and 0.112-0.144 parts of reinforcing and toughening material.

[0039] The cement is Portland cement or ordinary Portland cement of grade 42.5 or above; the reinforcing and toughening material is carbon fiber waste silk.

[0040] Component B is coarse aggregate and fine aggregate for cement concrete, and its mass ratio is: 32.5-52.5 parts of coarse aggregate and 27.5 parts of fine aggregate; the nominal maximum particle size of coarse aggregate is not more than 30mm, The nomina...

Embodiment 2

[0049] This example is an engineering component such as recycled cement concrete curbstones for recycling waste asphalt mixture, and its preparation method includes the following steps:

[0050] S1. Preparation of component A: cut 0.13 parts of carbon fiber waste silk to the required length, and mix it with 15 parts of cement in a certain proportion.

[0051] S2, Preparation of component C: After drying dimethyl sulfoxide, spray 0.046 parts of dimethyl sulfoxide evenly on the surface of 23 parts of waste asphalt mixture, and wait for the waste asphalt on the surface to dissolve; use 2 parts of water Dilute 2 parts of emulsified asphalt evenly in advance; pour the former into the latter and stir together for 1-2min;

[0052] S3. Preparation of component E: Dissolve 0.316 parts of surfactant in 6 parts of water in advance and stir evenly to prepare an aqueous solution of surfactant for later use.

[0053] S4. Mixing: Pour 40 parts of coarse aggregate and 27.5 parts of fine aggr...

Embodiment 3

[0056] The preparation method of engineering components such as recycled cement concrete curbs and other engineering components of waste asphalt mixture resource utilization in this embodiment includes the following steps:

[0057] S1. Preparation of component A: cut 0.119 parts of carbon fiber waste silk to the required length, and mix it with 14.9 parts of cement in a certain proportion.

[0058] S2, Preparation of component C: After drying dimethyl sulfoxide, spray 0.048 parts of dimethyl sulfoxide evenly on the surface of 24 parts of waste asphalt mixture, and wait for the waste asphalt on the surface to dissolve; use 2.5 parts of water Dilute 3 parts of emulsified asphalt evenly in advance; pour the former into the latter and stir together for 1-2min;

[0059] S3. Preparation of component E: Dissolve 0.3 parts of surfactant in 5.7 parts of water in advance and stir evenly to prepare an aqueous solution of surfactant for later use.

[0060] S4. Mixing: Pour 45 parts of co...

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Abstract

The invention relates to a recycled cement concrete prepared by recycling waste asphalt, and a preparation method and application thereof. The recycled cement concrete comprises a component A, a component B, a component C, a component D and a component E. The component A is composed of a cementing material cement and a reinforcing and toughening material; the component B comprises coarse aggregate and fine aggregate for cement concrete; the component C is formed by mixing a waste asphalt mixture, a rapid regenerant, emulsified asphalt and water; the component D is a super plasticizer; the component E is a surfactant aqueous solution; and the recycled cement concrete comprises, by mass, 13 to 20 parts of the component A, 60 to 80 parts of the component B, 25 to 35 parts of the component C, 1.28 to 1.98 parts of the component D and 5 to 8 parts of the component E. The aged asphalt in the waste asphalt mixture can be rapidly regenerated, the non-tight bonding performance existing at the interface of the waste asphalt mixture and the cement is improved, the workability and the compression resistance and bending resistance of the regenerated cement concrete are improved, and the regenerated cement concrete can be nearby used for curbs, side slope protection building blocks and other engineering members, and has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of construction waste materials, and in particular relates to a recycled cement concrete for recycling waste asphalt, a preparation method and application thereof. Background technique [0002] Asphalt pavement accounts for more than 80% of the roads that have been built in my country, and most of them have entered the stage of major and medium repairs. The main treatment methods are: waste landfill, thermal regeneration or cold regeneration. Deficiencies in energy efficiency and low utilization rate. [0003] If asphalt pavement recycling technology can be used for road maintenance and repair, not only can the original pavement materials be recycled, protect the environment, reduce the construction cost, but also correct the defects of the original pavement materials and transform the original pavement However, the existing asphalt pavement regeneration technology has defects such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04E01C11/22E01C19/10C04B24/36C04B24/16C04B18/16C04B18/04
CPCC04B28/04E01C19/1004E01C11/22C04B24/36C04B18/16C04B18/04C04B24/16C04B2201/50C04B14/28C04B14/068C04B2103/32C04B2103/40Y02A30/60Y02W30/91
Inventor 任靖峰杜素军曹军生李瑞郭重阳张俊红王建东张美珍程劲钊史云飞韩毛虎
Owner 山西交通养护集团有限公司
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