Paving compositions and method for producing the same

A method for producing a paving composition, which comprises the steps of

• 1. feeding into the narrow gap between a pair of opposed, closely spaced triturating discs, one of which is rotating relative to the other at a high speed, a starting mixture free of particles of mineral aggregate and consisting essentially of
• a. from 3 to 50% by weight of undigested coal particles, and
• b. the balance is a liquid bituminous material consisting principally of asphalt, said asphalt being at least about 50% by weight of the total weight of said starting mixture,
• 2. triturating said starting mixture by subjecting same to simultaneous compression, shear, friction and centrifugal forces between said discs at a temperature below about 200.degree. C. to subdivide the coal particles to a size in the range of 1 to 30.mu. and simultaneously uniformly mixing and dispersing the coal particles in the liquid bituminous material.

A method for producing a paving composition, which comprises the steps of:

• 1. feeding into the narrow gap between a pair of opposed closely spaced triturating discs which are rotating relative to each other at a high speed, a mixture consisting essentially of:
• a. an asphalt-free oil,
• b. undigested coal particles, the coal particles being the sole particulate material in the mixture,
• 2. triturating the mixture by subjecting same to simultaneous compression, shear, friction and centrifugal forces between said discs, at a temperature below about 200.degree. C., to subdivide the coal particles to a size in the range of 1 to 30.mu. and simultaneously uniformly mixing and dispersing the coal particles in the oil, and
• 3. adding asphalt to the mixture to obtain a composition containing from 3 to 50% by weight of coal particles.