Rubber-crumb-reinforced cement concrete
AssigneeTiremix Corporation
InventorRichard Frankowski
Life of this patent
Estimating the term…
Abstract
Rubber-crumb-reinforced cement-concrete structures (such as mortar (0), cement board (30), concrete masonry units (40), and concrete pipe (50)) provide resistance to cracking, increase resistance to acid rain, lower weight, improve shock wave absorption, lower heat conductivity and improve the acoustical environment. The structures preferably are made of concrete having a predetermined proportion (from about 1 to about 30 parts by weight per 100 parts by weight of cement) of recycled scrap rubber crumbs which are preferably undirectionally aligned in the cross-section of the structures.
Claims18
A concrete product made from a mixture consisting essentially of:
- a) 100 parts by weight of cement;
- b) 1-30 parts by weight of rubber;
- c) 10-70 parts by weight of water;
- and
- d) 100-700 parts by weight of material from the group consisting of sand, aggregate, and light aggregate,
- the concrete product having a compressive strength of at least 75 p.s.i.
A concrete product made according to ASTM standards for concrete products, but modified to include 1-30 parts by weight of rubber per 100 parts by weight of cement, the rubber being substituted for a substantially equal volume of aggregate, or, in the case of mortar, sand,
- the concrete product having a compressive strength of at least 75 p.s.i.
A method of making concrete products, including:
- making a mixture by mixing dry ingredients with water;
- stirring the mixture until the dry ingredients are properly mixed with the water;
- and
- allowing the mixture to cure into a concrete product,
- wherein the ingredients consist essentially of the ingredients called for by ASTM standards for concrete products, but substituting 1-30 parts by weight of rubber per 100 parts by weight of cement, the rubber being substituted for a substantially equal volume of aggregate, or, in the case of mortar, sand,
- the concrete products having a compressive strength of at least 75 p.s.i.
Dependencies are inferred from the claim text.