Methods and compositions for reclaiming concrete
US4964917A · kind A · utility
48Cited by
8References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1990 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Mar 8, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of reclaiming leftover ready-mix concrete comprising the steps of: PA1 (1) retarding the hydration of the unused portion of concrete returned from a job site; and PA0 (2) after the desired retarded period adding a hydration acceleration agent to restore the concrete to a settable state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.