Fast setting,crack resistant cementitious composition having inhibited shrinkage
Abstract
Abstract A CEMENTITIOUS COMPOSITION SUITABLE FOR REPAIRING HIGHWAY AND BEING CAPABLE OF DEVELOPING SUFFICIENT STRENGTH TO WITHSTAND NORMAL TRAFFIC IN LESS THAN TWO HOURS IS PREPARED FROM A HYDRAULIC CEMENT MIXTURE WITH A CHEMICAL ANALYSIS OF SO3 LESS THAN ABOUT 2.0% BY WEIGHT OF THE CEMENT IN WHICH A SUFFICIENT AMOUNT OF FLUID COKE TO OFFSET THE SHRINKAGE DURING SETTING AND EARLY HARDENING ARE MIXED THEREWITH. THE EARLY STRENGTH OF THE RESULTANT PATCH CAN BE FURTHER IMPROVED BY THE ADDITION THEREIN AND MIXED THEREWITH UP TO 100% BY WEIGHT OF THE CEMENT, A PRESSURE-CALCINED GYPSUM. THE ADDITION OF PRESSURE-CALCINED GYPSUM TO THE COMPOSITION ALSO SUBSTANTIALLY REDUCED THE LING-TERM SHRINKAGE OF THE RESULTANT PATCH.
Inventors
- 👤 H Babcock
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |