Apparatuses and systems for and methods of generating and placing zero-slump-pumpable concrete
US11766807B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jan 16, 2018 |
| Grant date | Sep 26, 2023 |
| Priority date | — |
| Expiry date | Apr 2, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G21/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Methods, systems, and devices, are developed for in-situ placement of a concrete mix that can have the thixotropy to hold vertical dimension without containment, while maintaining pliability to be pumped into place and manipulated to a desired shape, and can be combined with concrete set accelerators, allowing subsequent layers of this concrete mix to be continuously stacked in place to build tall walls and such without the use of forms. Concrete without these special properties is pumped toward the point of placement where it is modified by injecting and mixing, into that line of pumped concrete, an admixture containing thixotropes, thickeners and/or set accelerators or other modifiers to provide these properties and other improvements. This method allows conventional plant batching with commonly available constituent materials for batching an economical concrete that is delivered to a jobsite and then is pumped most of the way to a point of placement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.