Multiple scale cement composite with positive and ductile setting in uniaxial tension
US6860935B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 2001 |
| Grant date | Mar 1, 2005 |
| Priority date | — |
| Expiry date | Aug 22, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04C5/012
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a fiber/cement composite, the cementitious matrix of which has a water/binder ratio of less than 0.25 and consisting of cement, aggregate elements, fine pozzolanic elements and a plasticizer.The reinforcement consists of three types of fiber: a) metal fibers having a length of between 15 and 25 mm and a diameter of between 0.25 and 0.3 mm, in a percentage by volume of between 0.5 and 3%; b) metal fibers having a length of between 5 and 10 mm and a diameter of between 0.15 and 0.2 mm, in a percentage of between 4 and 7%; and c) 1.5 to 5% of short metal fibers having a length of less than 3 mm.The strength of this composite in uniaxial tension is greater than or equal to 30 MPa. It exhibits positive work-hardening and ductile behavior in uniaxial tension.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.