Dear Jose

A typical scrapped automobile tire weighs 9.1 kg (20 lb). Roughly 5.4 kg (12 lb) to 5.9 kg (13 lb) consists of recoverable rubber, composed of 35 percent natural rubber and 65 percent synthetic rubber. Steel-belted radial tires are the predominant type of tire currently produced in the United States. A typical truck tire weighs 18.2 kg (40 lb) and also contains from 60 to 70 percent recoverable rubber. Truck tires typically contain 65 percent natural rubber and 35 percent synthetic rubber. Although a majority of truck tires are steel-belted radials, there are still a number of bias ply truck tires, which contain either nylon or polyester belt material.

Physical Properties

Shredded Tires

Tire shreds are basically flat, irregularly shaped tire chunks with jagged edges that may or may not contain protruding, sharp pieces of metal, which are parts of steel belts or beads. As previously noted, the size of tire shreds may range from as large as 460 mm (18 in) to as small as 25 mm (1 in), with most particles within the 100 mm (4 in) to 200 mm (8 in) range. The average loose density of tire shreds varies according to the size of the shreds, but can be expected to be between 390 kg/m3 (24 lb/ft3) to 535 kg/m3 (33 lb/ft3). The average compacted density ranges from 650 kg/m3 (40 lb/ft3) to 840 kg/m3 (52 lb/ft3)...

Regards,

Ata

Thanks Prof. Ata. Would you recommend me some literature at respect?

Dear Jose

Please find the following links:

http://www.sciencedirect.com/science/article/pii/S0956053X11001747

http://www.sciencedirect.com/science/article/pii/S0261306900000522

http://www.sciencedirect.com/science/article/pii/S0008884604001681

https://www.scientific.net/KEM.717.86

http://www.sciencedirect.com/science/article/pii/S0360544217307995

https://www.acs.org/content/acs/en/pressroom/newsreleases/2016/august/reducing-tire-waste-by-using-completely-degradable-synthetic-rubber.html

Regards,

Ata

Thank so much Prof. Ata

The source for Ata's information is

https://www.fhwa.dot.gov/publications/research/infrastructure/structures/97148/st1.cfm

Note that the densities given are for shredded, chipped or crumbed tyres, compacted and uncompacted. Whole tyre stack density will likely be lower - and the density could vary by a factor of 3 depending on how they are stacked.

Thanks professor Wakelin.

Dear Jose, You may consult the following document regarding your question. You will find all necessary information on mechanical properties of an automobile scrap tire. Article Laboratory Creep Parameter Determination of Sand–TDA Mixture...

Jose Pizarro Ross Wakelin