Reactivatable set-inhibited cementitious compositions
US4455171A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1982 |
| Grant date | Jun 19, 1984 |
| Priority date | — |
| Expiry date | Dec 6, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B13/143
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Aqueous grouting compositions based on high alumina cement have the onset of setting delayed for upwards of one month by the incorporation therein of a set-inhibiting agent such as boric acid or gluconic acid delta lactone and can then be rapidly reactivated for use by the incorporation therein of a reactivator, for example lithium carbonate, to produce a high strength hardened cementitious composition. The reactivated composition can advantageously be used to anchor a reinforcing element such as a rockbolt or dowel in a borehole and for this purpose the set-inhibited cementitious composition and the reactivator can be packaged in the separate compartments respectively of a dual-compartment frangible cartridge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.