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US 6,218,002 B1Granted
Concrete mix containing polystyrene beads
AssigneePolysource, Inc.
InventorErik W. Wehtje
Life of this patent
Estimating the term…
Abstract
Substantially cylindrical unexpanded polystyrene beads with a diameter on the order of 1 mm and a length on the order of 3 mm are expanded into substantially cylindrical expanded polystyrene beads with a diameter between about 2 and 5 mm, and a length between about 4 and 10 mm. These expanded beads are well suited for use as a substitute for concrete aggregate to make lightweight concrete and concrete construction boards.
Claims8
A concrete mix comprising:
- cement;
- and
- a plurality of expanded polystyrene beads as an aggregate, each of said beads having a substantially cylindrical shape, a diameter between about 2 mm and about 5 mm, and a length between about 4 mm and about 10 mm wherein a ratio of the length to the diameter of each said bead is about 2:1.
Dependencies are inferred from the claim text.