Method and apparatus for continuous production of colloidally-mixed cement slurries and foamed cement grouts
US5795060A · kind A · utility
Inventor
Key dates
| Filing date | May 17, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | May 17, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28C7/126
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus for high capacity production of high-fluidity, colloidally mixed cement slurry. Water and cement dust are combined at metered rates by a premixing assembly which discharges into a mixing tub. The high-speed, high-shear pump recirculates the material through the tub to produce the colloidally-mixed slurry. The high-fluidity slurry may be provided to a second pump, preferably of the positive-displacement, progressive-cavity, rotor-stator type, for supplying the slurry at a metered rate. Finished foam material may also be provided to the slurry metering pump at the metered rate, so the materials are mixed to form a foamed cement grout in which the weight and quality of the material is precisely adjustable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.