Method and a composition for preparing concrete elements having remarkable compressive strength and fracture energy, and elements obtained thereby
US5522926A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1994 |
| Grant date | Jun 4, 1996 |
| Priority date | — |
| Expiry date | Jun 30, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2201/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method and composition for preparing concrete elements comprising the steps of mixing a composition comprising the following components expressed in parts by weight (p): a) 100 p of Portland cement; b) 30 p to 100 p or better 40 p to 70 p of fine sand having a grain size of at least 150 micrometers; c) 10 p to 40 p or better 20 p to 30 p of amorphous silicon having a grain size of less than 0.5 micrometers; d) 20 p to 60 p or better 30 p to 50 p of ground quartz having a grain size of less than 10 micrometers; e) 25 p to 100 p, or better 45 p to 80 p of steel wool; f) a dispersing agent; g) 13 p to 26 p or better 15 p to 22 p of water; and after setting, curing the concrete at a temperature of 250.degree. C. or higher, for a length of time sufficient to transform cement hydration products into crystalline hydrates of the xonotlite type; thus eliminating substantially all of the free water and at least the main part of the adsorbed and chemically bonded water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.