Particulate rubber included concrete compositions
AssigneeThe Trustees of the University of Pennsylvania
InventorsIraj Zandi, John Lepore, Hossein Rostami
Life of this patent
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Abstract
Concrete compositions are provided which contain particulate rubber, preferably recycled rubber from such sources as automobile tires, in amounts between about 0.05 and about 20 percent by weight of the concrete composition. The concrete compositions further contain portland cement, water, and an aggregate material. Additional materials such as superplasticizers and fly ash can also be admixed with the concrete compositions.
Claims22
A concrete composition comprising portland cement and particulate rubber, said rubber being present in an amount between about 0.05 and about 20 weight percent of the concrete composition;
- said rubber having a particle size distribution such that from about 50-95 weight percent of the rubber particles pass through a 3/8 inch sieve and about 20-75 weight percent of the rubber particles pass through a No. 4 sieve.
A cured concrete composite comprising portland cement and particulate rubber, said rubber being present in an amount between 0.05 to about 20 weight percent of the composite;
- said rubber having a particle size distribution such that from about 50-95 weight percent of the rubber particles pass through a 3/8 inch sieve and about 20-75 weight percent of the rubber particles pass through a No. 4 sieve.
A concrete composition comprising:
- (a) binder for concrete consisting essentially of portland cement;
- (b) particulate rubber, said rubber being present in an amount between about 0.05 and about 20 weight percent of the concrete composition;
- said rubber having a particle size distribution such that from about 50-95 weight percent of the rubber particles pass through a 3/8 inch sieve and about 20-75 weight percent of the rubber particles pass through a No. 4 sieve;
- and
- (c) sand present in an amount between about 10 and about 40 weight percent of the concrete composition;
- said sand having a particle size distribution such that from about 70-90 weight percent of the sand particles pass through a No. 30 sieve and about 92-100 weight percent of the sand particles pass through a No. 16 sieve.
Dependencies are inferred from the claim text.