Lightweight ceramic material for building purposes

US5015606A · kind A · utility

Assignee

• Effem GmbH · DE

Inventors

• Rudiger Lang · Minden, DE
• Bernd Meyer · Munich, DE

Key dates

• Filing date: Feb 1, 1990
• Grant date: May 14, 1991
• Expiry date: Feb 1, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2111/00112
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Lightweight ceramic material for building purposes, particularly for bricks, plates and panels, as well as for using as an aggregate/filler material for lightweight building materials, characterized by a porosity of 50 to 300%, preferably 100 to 250%; a pH-value between 5 and 9, particularly 7 to 8; a bulk density of 300 to 700 g/l; which can be produced by firing a foamed mixture of clay or clays, optionally aggregate or aggregates, anionic or cationic surfactant or surfactants, deflocculant or deflocculants, and optionally a hydraulic binder, such as cement, at temperatures above 600.degree. C., process for the production thereof and the use thereof.