Recycled plastic aggregate for use in concrete
AssigneeKing Saud University
InventorFAHAD KHSHIM ALQAHTANI
Life of this patent
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Abstract
The synthetic recycled plastic aggregate for use in concrete is a composite material containing between 30% and 50% by weight shredded recycled plastic, the balance being a filler embedded in a matrix of the recycled plastic. The recycled plastic includes polyethylene terephthalate (PET). The filler can include dune sand, fly ash and quarry fines. The synthetic recycled plastic aggregate is best used to make concrete with a water-to-cement ratio of at least 0.5.
Claims14
1-11. (canceled)
A method of making a synthetic recycled plastic aggregate for use in concrete, comprising the steps of:
- shredding and grinding a recycled plastic, the recycled plastic including polyethylene terephthalate (PET), wherein the recycled plastic has a maximum particle size of 2.36 mm;
- mixing the recycled plastic with filler to form a homogenized mixture;
- drying the homogenized mixture;
- pouring the homogenized mixture into a mold;
- heating the homogenized mixture in the mold to about 300° C. and compressing the homogenized mixture in the mold by applying 30 tons of pressure using a compression molding press machine, the heating and compressing occurring at the same time;
- cooling the mold at room temperature for about 30 min to form a composite of filler encapsulated in a matrix of the recycled plastic;
- and
- shredding the composite to form particles of synthetic recycled plastic aggregate for use in making concrete, the synthetic recycled plastic aggregate including from about 30% to about 50% by weight of the recycled plastic, with the balance being the filler.
(canceled)
A method of making a synthetic recycled plastic aggregate (RPA) for use in concrete, comprising the steps of
- shredding and grinding recycled plastic to form a particulate plastic, the particulate recycled plastic being from about 30% to about 50% by weight of the synthetic recycled plastic aggregate (RPA), wherein the shredded recycled plastic includes a maximum particle size of 2.36 mm;
- mixing the particulate recycled plastic with about 50% to about 70% by weight of a filler and a plurality of particles to form a homogenized mixture, each particle having a maximum particle size of 0.15 mm;
- melting the particulate recycled plastic to embed the filler in a matrix of the melted shredded recycled plastic;
- compressing the matrix to form a compressed matrix;
- solidifying the compressed matrix to form a solid matrix;
- and
- crushing the solid matrix to provide the balance of the synthetic recycled plastic aggregate (RPA).
Dependencies are inferred from the claim text.