Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for preparing curb stones from pavement recycled materials and the prepared curb stones

A technology of recycled materials and curbstones, applied in the direction of manufacturing tools, surface layering devices, sustainable waste treatment, etc., can solve the problems of increasing the cost of road surface, low content of old materials, affecting the surrounding environment, etc., to improve the resistance to salt freezing ability, make full use of waste materials, and avoid the effect of asphalt sticking to the pan

Active Publication Date: 2022-03-18
SHANDONG HI SPEED GRP CO LTD +2
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

RAP materials piled up like mountains, on the one hand, occupy a large area and are difficult to handle, affecting the surrounding environment, which is not conducive to the coordinated development of resources and the environment; on the other hand, old asphalt and old aggregates have utilization value. Still increasing the use of new aggregates and new asphalt will not only increase the cost of the road surface, but also increase the construction cost
[0003] The existing method of making curbstones from pavement recycled materials is generally heating waste materials-mixing-adding new asphalt-pouring into molds to form. This method is cumbersome to operate. Adhesion during the process, so the use of fine aggregates with relatively high asphalt content is limited, and in order to compensate for the loss of asphalt during the heating process, new asphalt needs to be added during mixing, and in order to ensure product adhesion, prepare raw materials Binders will also be added to increase the cost
[0004] In view of the outstanding problems existing in the current recycling of pavement materials, industry insiders concluded that: first, the utilization rate is low, and the total recycling rate of old materials is less than 30%; The amount is less than 30%, and all of them are coarse aggregates (due to the high content of asphalt in fine aggregates, secondary aging is caused during the heating process and it is easy to be bonded in the heating cylinder); the third is that the use value is low, and the asphalt surface material It is used as backfilling material for grass roots or even roadbeds, and expressway pavement materials are used for low-grade highways; fourth, the research and development of recycling technology, materials and equipment are backward, lacking comprehensive and systematic research, and the research and development of new materials and new equipment in various special links is far behind not meet actual needs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for preparing curb stones from pavement recycled materials and the prepared curb stones

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]A kind of curb stone prepared by using pavement recycled materials, which is made of the following components:

[0045] The mass ratio of RAP material is: 0-5mm: 40 parts, 5-12mm: 30 parts, 12-18mm: 30 parts; the amount of magnetizer accounts for 2wt.% of the RAP material; the magnetizer is made of steel fiber, and the length is 2-6mm , with a diameter of 400-800 μm; the amount of rock asphalt powder accounts for 5wt.% of the RAP material, and the particle size is 100-200 mesh.

[0046] The preparation steps include: mixing the above-mentioned mixed materials into a mold for electromagnetic heating, sealing and fixing the bottom and surroundings of the mold for electromagnetic heating, pressurizing the upper part, controlling the pressure to 4MPa, and controlling the temperature of electromagnetic heating to 150° C., the holding time is 7-9 seconds, and the curb stone body is obtained.

[0047] Using super-hydrophobic cement slurry to plaster the obtained curb body to o...

Embodiment 2

[0050] A kind of curb stone prepared by using pavement recycled materials, which is made of the following components:

[0051] The mass ratio of RAP material is: 0-5mm: 65 parts, 5-12mm: 15 parts, 12-18mm: 10 parts, 18-30mm: 10 parts; the amount of magnetizer accounts for 5wt.% of the RAP material, and the magnetizer is made of steel slag powder, 80-100 mesh; rock asphalt powder content accounts for 2wt.% of the RAP material, and the particle size is 100-200 mesh.

[0052] The preparation steps include: putting the above materials into a mold for electromagnetic heating, pressurizing by sealing and fixing the surroundings and pressurizing the upper part, the pressure is controlled at 5MPa, the electromagnetic heating temperature is controlled at 140°C, and the holding time is 8-10 seconds. Obtain the curb stone body.

[0053] Using super-hydrophobic cement slurry to plaster the obtained curb body to obtain curb stones, the properties of curb stones are shown in Table 1.

[0...

Embodiment 3

[0056] A kind of curb stone prepared by using pavement recycled materials, which is made of the following components:

[0057] The mass ratio of RAP material is: 0-5mm: 55 parts, 5-12mm: 25 parts, 12-18mm: 15 parts, 18-30mm: 5 parts; Iron powder, 80-100 mesh; the amount of rock asphalt powder accounts for 3.5wt.% of the RAP material, and the particle size is 100-200 mesh.

[0058] The preparation steps include: putting the above materials into a mold for electromagnetic heating, pressurizing by sealing and fixing the surroundings and pressurizing the upper part, the pressure is controlled at 3MPa, the electromagnetic heating temperature is controlled at 160°C, and the holding time is 7 seconds to obtain curbstones body.

[0059] Using super-hydrophobic cement slurry to plaster the obtained curb body to obtain curb stones, the properties of curb stones are shown in Table 1.

[0060] The weight composition of the above-mentioned super-hydrophobic cement paste is: 100 parts of ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
lengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of recycling of building materials, in particular to a method for preparing curb stones from recycled pavement materials and the prepared curb stones. The method comprises the steps of mixing pavement reclaimed materials with different particle sizes and a magnetizer in a certain proportion, and then performing electromagnetic heating to prepare a road curb green body. Compared with the current situation where the old material is low in content and basically coarse aggregate, this method realizes 100% utilization of RAP material, fully utilizes the recycled fine material with relatively high asphalt content, and saves the new asphalt in the preparation process. The addition of the material greatly reduces the cost; the electromagnetic heating method is simpler than the existing heating and mixing method, and avoids the defect of easy sticking to the pot due to the high asphalt content in the recycled material.

Description

technical field [0001] The invention relates to the technical field of recycling of building materials, in particular to a method for preparing curb stones from recycled pavement materials and the prepared curb stones. Background technique [0002] With the development of the economy and the increase of traffic volume and axle load, more and more pavement diseases appear on the asphalt pavement, such as cracks, potholes, ruts, looseness, etc. The road surface gradually enters the period of medium repair and overhaul. The renovation of the original road surface is basically by milling or excavating the original road surface, and then adding new asphalt pavement. This process can obtain a large amount of recycled asphalt pavement from the original road surface. (RAP). According to estimates, the asphalt pavement old materials produced annually in major and medium repair projects of trunk roads alone amount to 160 million tons. RAP materials piled up like mountains, on the on...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B18/16C04B14/48C04B41/65B28B3/02B28B1/52B28B7/34B28B19/00
CPCC04B26/26C04B18/16C04B14/48C04B41/65C04B41/5076B28B3/025B28B1/523B28B7/34B28B19/0053C04B2111/00612C04B2201/50C04B2201/20C04B41/4539C04B18/142C04B14/34Y02W30/91
Inventor 白玉铎李传海丁晓岩卜德江樊超胡学亮阚涛张永豪高国华史福泉张广威
Owner SHANDONG HI SPEED GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com