TDA CIVIL ENGINEERING PROPERTIES
Tire Derived Aggregate is approximately 1/3 weight of
soils (600lbs. per loose volume cubic yard). 1 ton = 1.67 cubic yards (in place), In-place density = 45-50lb/ft3.
Drains 10x better than soil. TDA is free draining
and has higher permeability than typical drainage rock. (1 to 30 cm/sec)
Process of insulating material from transferring heat between the
materials that are in thermal contact. TDA is 8x better than stone with an R-Value of 7.
Shear strength is the strength of a material or component against the
type of yield or structural failure where the material or component fails in shear. The shear strength is the load that an object is able to withstand in a direction parallel to the face of the material, as opposed to perpendicular to the surface
TDA can be the material between the parallel layers stopping capillary
action. The high porosity of TDA and its non-absorptive qualities prevent water from wicking towards the surface, eliminating frost heaving.
The fibrous nature of TDA produces internal reinforcement, creating a “Snowshoe Effect” that prevents differential settlement and adds global support to an overlying structure.
REDUCE LATERAL LOAD
Lateral loads are live loads that are applied parallel to the ground; that is, they are horizontal forces acting on a structure. They are different from gravity loads which are vertical, downward forces.
TDA has a large storage capacity due to its 50% Void Space (10% greater than stone). The Void Ratio of a mixture is the ratio of the volume of voids to the volume of solids. It is a dimensionless quantity in materials science and is closely related to porosity as follows: and where is void ratio, is porosity, VV is the volume of void-space, VS is the volume of solids, and VT is the total or bulk volume.
TDA can reduce ground borne vibrations (a technical term that is used to describe mostly man-made vibrations of the ground, in contrast to natural vibrations of the Earth studied by seismology). For example, vibrations caused by explosions, construction works, railway and road transport, etc. - are all ground bourne vibrations.