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

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1

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

[0042]

[0043] The present invention uses aggregates other than the above-mentioned grades to prepare mortar and conducts experimental research. It is found that the prepared mortar has lower strength in performance and affects application. See Table 2 below for details.

[0044]

[0045] It can be seen from the above table that the compressive strength...

Example Embodiment

[0050] Example 2

[0051] The early-strength plastic mortar is prepared, and its composition is: the sand and mineral powder of the above table 4 grades are used as aggregates, and PET chips are used as binders. The mass ratio of aggregate to binder is 2.8:1. The preparation method is as follows:

[0052] (1) Remove the labels and caps of the waste PET plastic bottles to obtain a relatively pure PET material. After the bottles are cut into small PET fragments, they are properly washed with clean water and dried for later use;

[0053] (2) Weigh the aggregate and PET fragments according to the ratio, mix them, and then heat the mixture at 270~290℃ for about 30-50 minutes to make the mixture into a fluid state to obtain a rapid repair mortar for the road surface. The basic properties of the resulting mortar are shown in Table 5. Shown.

[0054]

[0055] It can be seen from Table 5 that the water absorption rate of plastic mortar is low, and the penetration resistance is good, and it h...

Example Embodiment

[0056] Example 3

[0057] The aggregate is graded according to the above table 4, and the waste PET plastic is used as the raw material to prepare the quick repair mortar. The composition of the mortar is: the sand and mineral powder in the above table 4 are used as the aggregate, and the PET chips are used as the binder. The mass ratio of aggregate to binder is 3:1. The preparation method is as follows:

[0058] (1) Remove the labels and caps of the waste PET plastic bottles to obtain a relatively pure PET material. After the bottles are cut into small PET fragments, they are properly washed with clean water and dried for later use;

[0059] (2) Weigh the aggregate and PET chips according to the ratio, mix them, and then heat them at 270°C. When the mixture becomes a fluid state for about 50 minutes, the road surface quick repair mortar is obtained. The basic properties of the resulting mortar are shown in Table 6.

[0060]

[0061] figure 1 Indicates the relationship between the co...

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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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