Reflective concrete body, process for the manufacture and utiliz

Details Reflective concrete body, process for the manufacture and utiliz Reflective concrete body, process for the manufacture and utiliz

1979-01-05

1980-08-19

Poer, James

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

404 17, C04B 708, C04B 710

Patent

active

042182603

ABSTRACT:
In a road surface and a process for making same, a top layer of reflex reflective concrete in slab or cylindrical form is made of a mixture of white Portland cement, particulate white quartz filler material, colorless crystal balls and titanium dioxide pigment. The quartz filler is a trigonal trapezohedrical .beta.-quartz powder having a refractive index of 1.55 and a particle size less than the glass ball diameters, the latter being from 0.2 to 0.6 mm. The glass balls constitute from 50 to 70% of the mixture and are arranged within the top layer of concrete in successive layers with those balls closest to the impact surface of the top layer being half exposed to intercept light from car headlamps.

REFERENCES:
patent: 3417676 (1968-12-01), Lenoble
patent: 3823021 (1974-07-01), Jansen
patent: 3964821 (1976-06-01), Eigenmann
patent: 4049337 (1977-09-01), Eigenmann

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