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Method for preparing aggregates special for pavement asphalt from construction wastes and waste plastics

A technology for waste plastics and construction waste, applied in buildings, roads, roads, etc., can solve the problems of not being able to maximize the utilization of construction waste, achieve good environmental and social benefits, good environmental protection, and reduce production costs.

Inactive Publication Date: 2017-12-08
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And this is far from reaching the maximum utilization of construction waste

Method used

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  • Method for preparing aggregates special for pavement asphalt from construction wastes and waste plastics

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Embodiment 1

[0031] A method for preparing pavement asphalt special aggregate by using construction waste and waste plastics, the specific process of preparing recycled aggregate is as follows:

[0032] Crush the construction waste so that its outer diameter is not greater than 300mm, and use a metal separator with a sensitivity of not less than 0.5mm for iron, not less than 0.8mm for stainless steel, and not less than 1mm for other metals to separate and remove the metal components. . Then wash it with water for at least 3 times, remove the soil, and obtain construction waste that retains components such as masonry, concrete, wood, and plastic products; then dry it until the moisture content does not exceed 80%, and place it in a special recoil for construction waste In the type pulverizer, double-rotor upper and lower stages are used to pulverize, and the initial recycled aggregate with a particle size of no more than 5mm is obtained; then it is placed in a vertical eccentric device, and...

Embodiment 2

[0035] A method for preparing pavement asphalt special aggregate by using construction waste and waste plastics, the specific process of preparing recycled aggregate is as follows:

[0036] Crush the construction waste so that its outer diameter is not greater than 300mm, and use a metal separator with a sensitivity of not less than 0.5mm for iron, not less than 0.8mm for stainless steel, and not less than 1mm for other metals to separate and remove the metal components. . Then wash it with water for at least 3 times, remove the soil, and obtain construction waste that retains components such as masonry, concrete, wood, and plastic products; then dry it until the moisture content does not exceed 80%, and place it in a special impact machine for construction waste In the pulverizer, the upper and lower stages of double rotors are used to crush to obtain the initial recycled aggregate with a particle size of no more than 5mm; then it is placed in a vertical eccentric device, and...

Embodiment 3

[0039] A method for preparing pavement asphalt special aggregate by using construction waste and waste plastics, the specific process of preparing recycled aggregate is as follows:

[0040] Crush the construction waste so that its outer diameter is not greater than 300mm, and use a metal separator with a sensitivity of not less than 0.5mm for iron, not less than 0.8mm for stainless steel, and not less than 1mm for other metals to separate and remove the metal components. . Then wash it with water for at least 3 times, remove the soil, and obtain construction waste that retains components such as masonry, concrete, wood, and plastic products; then dry it until the moisture content does not exceed 80%, and place it in a special recoil for construction waste In the type pulverizer, double-rotor upper and lower two-stage crushing is used to obtain the initial recycled aggregate with a particle size of no more than 5mm; then it is placed in a vertical eccentric device, which adopts...

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Abstract

The invention belongs to the technical field of preparation of novel construction materials, and provides a method for preparing aggregates special for pavement asphalt from construction wastes and waste plastics. The method comprises the following steps: firstly, crushing the construction wastes to obtain the construction wastes retaining masonries, concrete, woods, plastic products and other components; then, placing in a vertical eccentric device for improving density, mechanical properties and surface properties of the aggregates so as to obtain strengthened regenerated aggregates; next, immersing in a sodium silicate solution for activating to obtain activated regenerated aggregates; finally, mixing with molten waste plastics, performing condensation, solidification and other treatments to obtain the aggregates special for pavement asphalt having good bonding property to hot melting asphalt and relatively high strength. The preparation method provided by the invention adopts the construction wastes and the waste plastics as main raw materials, have excellent environmental and social benefits, greatly reduces production costs of the aggregates and improves the properties of the pavement asphalt.

Description

technical field [0001] The invention belongs to the technical field of building material preparation and provides a method for preparing special aggregate for pavement asphalt by using construction waste and waste plastics. Background technique [0002] With the development of science and technology and the progress of society, human beings are increasingly pursuing a comfortable and beautiful living environment. The construction scale of various social infrastructures is becoming larger and larger, and building materials are increasingly showing their important status. In the past half century, the construction industry has developed vigorously, which has led to various new building materials springing up like mushrooms after rain. There are mainly new wall materials, thermal insulation materials, waterproof sealing materials, and decoration materials. [0003] If the emergence of steel and concrete as structural materials in the 19th century led to a leap in the scale of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/18E01C7/18E01C19/05
CPCC04B28/182C04B2111/0075C04B2201/50E01C7/182E01C19/05C04B18/20C04B18/167
Inventor 陈庆曾军堂
Owner CHENDU NEW KELI CHEM SCI CO LTD
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