Method for recycling PET (polyethylene terephthalate) plastics, early-strength plastic mortar and method for preparing mortar

A plastic sand and plastic technology, which is applied in the field of plastic recycling and building materials, can solve the problems of large usage and difficult disposal, and achieve the effects of rapid strength growth, improvement of environmental pollution, and low cost

Inactive Publication Date: 2012-01-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a recycling method for PET plastics according to the problems of existing plastic materials recycling and large amount of use, which saves resources, protects the environment, and has good social and economic significance

Method used

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  • Method for recycling PET (polyethylene terephthalate) plastics, early-strength plastic mortar and method for preparing mortar
  • Method for recycling PET (polyethylene terephthalate) plastics, early-strength plastic mortar and method for preparing mortar
  • Method for recycling PET (polyethylene terephthalate) plastics, early-strength plastic mortar and method for preparing mortar

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The aggregate used in the present invention is sand and mineral powder, and the used sand is common river sand with a particle size below 9.5 mm. When sand is used, its gradation is designed according to the sand grain type AC-5 in the "Technical Specifications for Construction of Highway Asphalt Pavement". It is concluded that the following gradation ratio of aggregate can enhance the mechanical properties of mortar. The gradation requirement range of the aggregate of the present invention is shown in Table 1. For the aggregate materials smaller than 0.075mm, mineral powder is used instead.

[0042]

[0043] The present invention uses aggregates that are not the above-mentioned gradation to prepare mortar for experimental research. It is found that the prepared mortar has low strength in performance, which affects the application. See Table 2 for details.

[0044]

[0045] It can be seen from the above table that the compressive strength of the mortar prepared by...

Embodiment 2

[0051] Prepare early-strength plastic mortar, which is composed of: the sand and mineral powder graded in Table 4 above are used as aggregates, and PET chips are used as binders, wherein the mass ratio of aggregates to binders is 2.8:1. Its preparation method is as follows:

[0052] (1) Remove the labels and caps from waste PET plastic bottles to obtain relatively pure PET materials. After cutting the bottles into small PET fragments, wash them properly with clean water and dry them for later use;

[0053] (2) Weigh the aggregate and PET fragments according to the proportion, mix them, and then heat at 270-290°C for about 30-50 minutes to make the mixture flowable to obtain the road surface rapid repair mortar. The basic properties of the obtained mortar are shown in Table 5 shown.

[0054]

[0055] It can be seen from Table 5 that plastic mortar has a low water absorption rate and good anti-permeability performance, which has a certain effect on preventing road water dama...

Embodiment 3

[0057] The aggregates are graded according to the above table 4, and waste PET plastics are used as raw materials to prepare quick repair mortar. The mortar is composed of: the sand and mineral powder graded in the above table 4 are aggregates, and PET fragments are used as binders, wherein The mass ratio of aggregate to binder is 3:1. Its preparation method is as follows:

[0058] (1) Remove the labels and caps from waste PET plastic bottles to obtain relatively pure PET materials. After cutting the bottles into small PET fragments, wash them properly with clean water and dry them for later use;

[0059] (2) Weigh the aggregate and PET fragments according to the ratio, mix them, and then heat at 270°C. After about 50 minutes, the mixture becomes fluid to obtain the road surface rapid repair mortar. The basic properties of the obtained mortar are shown in Table 6.

[0060]

[0061] figure 1 Indicates the relationship between the compressive strength of plastic mortar and ...

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Abstract

The invention discloses a method for recycling PET (polyethylene terephthalate) plastics. In the recycling method, waste PET plastics are cut into pieces to be used as a binder of mortar. The invention also discloses an early-strength plastic mortar prepared from PET and a preparation method thereof. Sand and mineral powder are used as aggregates of the mortar, and waste PET plastics are taken as a binder, and the mass ratio of the aggregates to the binder is (2.8-3.2):1. According to the invention, a new approach is provided for recycling the waste PET plastics, and the environmental pollution caused by PET plastic bottles can be improved effectively. The mortar made of waste PET plastics is low in cost and simple in manufacturing process, the properties such as compression resistance and flexural resistance and the like of the mortar meet requirements, and the strength of the mortar is increased quickly, therefore, the mortar can be used as a quick repairing material for roads.

Description

technical field [0001] The invention relates to a recycling method of PET waste plastics, which is made into plastic mortar, which can be used for quickly repairing damaged concrete pavement, and also relates to a preparation method of the mortar, which belongs to the technical fields of plastic recycling and building materials. Background technique [0002] With the continuous increase in the number and variety of beverages, the use of PET bottles continues to grow, and is now used in the packaging of purified water, mineral water, tea beverages, beer, and milk. At present, the number of PET containers used in the world has reached 150 billion. In China, only in Beijing, the total amount of waste PET bottles produced in 2009 has reached 150,000 tons, which is about 6 billion waste PET bottles. 20% speed increment. Since there is no effective biodegradation method, the environmental problems caused by the rapid growth of the use of PET plastic bottles have become increasing...

Claims

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Application Information

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IPC IPC(8): C04B26/10
Inventor 葛智李鹏程张堃
Owner SHANDONG UNIV
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