Workability, Mechanical Properties, and Chemical Stability of a Recycled Tyre Rubber-Filled Cementitious Composite.
Workability, Mechanical Properties, and Chemical
Stability of a Recycled Tyre Rubber-Filled Cementitious
Raghavan, D.; Huynh, H.; Ferraris, C. F.
Journal of Materials Science, Vol. 33, 1745-1752, 1998.
composite materials; building technology; rubber tires;
recycle; workability; mechanical properties; chemical
The workability and mechanical properties of mortar
containing shredded automobile and truck tyres were
evaluated. Two different shapes of rubber particles
were used as constituents of mortar: (1) granules about
2 mm in diameter, and (2) shreds having two sizes which
were, nominally, 5.5 mm x 1.2 mm and 10.8 mm x 1.8 mm
(length x diameter). As expected, the geometry of the
rubber particles influenced the fracture behavior of
rubber-containing mortar. The addition or rubber led to
a decrease in flexural strength and plastic shrinkage
cracking of mortar. The crack width and crack length
due to plastic shrinkage were reduced for mortar
containing the 10.8 x 1.8 mm rubber shreds compared with
a mortar without shreds. The rheological properties of
the mortar containing rubber shreds were comparable to
those of a mortar without rubber andyielded lower
plastic viscosity than a mortar containing 25.4 mm x 15
mum (length x diameter) polypropylene fibers. The
alkaline stability of rubber in mortar was also
evaluated by immersing rubber shreds in NaOH and Ca(OH)2
solutions for 4 mon and the results showed that there is
less than 20% change in stress and strain value. The
findings of the research suggest that automobile and
truck tyres can be recycled by shredding and
incorporating them into mortar and probably concentrate
for certain infrastructural applications.