NZ791590A - Paving material compositions and production processes therefor - Google Patents
Paving material compositions and production processes thereforInfo
- Publication number
- NZ791590A NZ791590A NZ791590A NZ79159022A NZ791590A NZ 791590 A NZ791590 A NZ 791590A NZ 791590 A NZ791590 A NZ 791590A NZ 79159022 A NZ79159022 A NZ 79159022A NZ 791590 A NZ791590 A NZ 791590A
- Authority
- NZ
- New Zealand
- Prior art keywords
- plastic
- composition
- extruder
- waste
- slurry
- Prior art date
Links
Abstract
method of producing paving material compositions comprises collecting mixed plastic waste; granulating the plastic waste into plastic pieces; feeding the plastic pieces and other ingredients comprising at least agent into an extruder wherein the extruder heats and mixes the plastic pieces and other ingredients to form a slurry; and pouring the slurry from the extruder into moulds. The composition may comprise 40% to 75% binding agent comprising the mixed plastic waste and 30% to 80% strengthening agent. r ingredients to form a slurry; and pouring the slurry from the extruder into moulds. The composition may comprise 40% to 75% binding agent comprising the mixed plastic waste and 30% to 80% strengthening agent.
Claims (23)
1. A method of producing paving material compositions comprising: collecting mixed plastic waste; granulating the plastic waste into plastic pieces; feeding the plastic pieces and other ingredients comprising at least agent into an extruder wherein the extruder heats and mixes the plastic pieces and other ingredients to form a slurry; and pouring the slurry from the extruder into moulds.
2. The method as claimed in claim 1, wherein the process comprises using mixed plastic waste comprising at least two types of different plastic.
3. The method as claimed in claim 2, wherein the plastic waste comprises at least two of PET (Polyethylene terephthalate), HDPE (High density polyethylene), LDPE (Low density polyethylene), PP (polypropylene), polystyrene and MLP (Multi- layer plastic),
4. The method as claimed in claim 1, further comprising pressurising the slurry in the moulds.
5. The method as claimed in claim 1, further comprising allowing the slurry to cure in the moulds for between 30 seconds and 30 minutes.
6. The method as claimed in claim 1, wherein the plastic waste is granulated to plastic pieces less than 20 mm in diameter.
7. The method as claimed in claim 1, further comprising washing the plastic pieces with water to remove impurities and contaminants and subsequently drying the plastic pieces.
8. The method as claimed in claim 7, further comprising recycling the water to wash further plastic pieces.
9. The method as claimed in claim 1, further comprising mixing the plastic pieces with a copolymer in a mixer.
10. The method as claimed in claim 1, wherein the extruder initially heats the plastic pieces and other ingredients to between 120° – 400°C.
11. The method as claimed in claim 1, wherein the extruder at least one of mixes and rotates the heated plastic pieces and other ingredients to form a generally homogenous slurry.
12. The method as claimed in claim 11, wherein the extruder mixes or rotates up to 25 RPM.
13. A paving material composition comprising: 40% to 75% binding agent comprising mixed plastic waste; and 30% to 80% strengthening agent.
14. The composition as claimed in claim 13, wherein the plastic waste comprises at least two of PET (Polyethylene terephthalate), HDPE (High density polyethylene), LDPE (Low density polyethylene), PP (polypropylene), polystyrene and MLP (Multi- layer plastic),
15. The composition as claimed in claim 13, wherein the strengthening agent is granular.
16. The composition as claimed in claim 15, wherein the strengthening agent has particulate size of less than approximately 5 mm.
17. The composition as claimed in claim 16, wherein the strengthening agent comprises sand.
18. The composition as claimed in claim 16, wherein the strengthening agent comprises granulated concrete construction waste.
19. The composition as claimed in claim 13, further comprising 3% to 10% smoothing agent.
20. The composition as claimed in claim 19, wherein the smoothing agent comprises fly ash.
21. The composition as claimed in claim 19, wherein smoothing agent comprises granular ceramic waste.
22. The composition as claimed in claim 19, further comprising up to 10% colouring agent.
23. The composition as claimed in claim 22, wherein the colouring agent comprises a titanium dioxide base.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021902661 | 2021-08-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NZ791590A true NZ791590A (en) | 2022-08-26 |
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