Early high-strength portland cement and method of manufacture
US4160674A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1978 |
| Grant date | Jul 10, 1979 |
| Priority date | — |
| Expiry date | Jan 30, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B7/527
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cement with rapid strength gain having normal setting and volume change characteristics and its method of manufacture are disclosed. The cement has substantially all particles over 20 microns removed which advantageously results in higher early strength than normal portland cements. This is important in the prestress and precast concrete industry, and early high-strength cement is desirable for other uses such as patching or resurfacing highways and airport runways or in operations where early form removal is desired. The use of chlorides or other accelerators is unnecessary to obtain early high strengths; although, these and plasticizers can be used if desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.