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1. (WO2001002317) WATER-ENTRAINED CEMENT-BASED MATERIALS

Pub. No.:    WO/2001/002317    International Application No.:    PCT/DK2000/000358
Publication Date: Fri Jan 12 00:59:59 CET 2001 International Filing Date: Sat Jul 01 01:59:59 CEST 2000
IPC: C04B 22/00
C04B 28/02
C04B 40/06
Applicants: DENSIT A/S
HANSEN, Per, Freiesleben
JENSEN, Ole, Mejlhede
Inventors: HANSEN, Per, Freiesleben
JENSEN, Ole, Mejlhede
Title: WATER-ENTRAINED CEMENT-BASED MATERIALS
Abstract:
The invention relates to a method for reducing autogenous shrinkage in a material based on a hydraulic mineral binder, e.g. cement, by preparing a mixture comprising the binder, water and a water-entraining agent selected from the group consisting of hydrogels and microencapsulated water, casting the mixture in a desired configuration, and allowing the mixture to cure. The method is in particular directed to high performance cement-based materials with a low water/cement ratio and optionally comprising ultrafine particles such as silica fume. The water-entraining agent is in particular a hydrogel. Also disclosed are dry compositions comprising fine particles such as cement, ultrafine particles such as silica fume, optionally a dispersing agent such as a concrete superplasticizer, and a water-entraining agent such as a hydrogel.