Process for the manufacture of artificial stone articles

• US 3,149,986 A
• Filed: 03/13/1961
• Issued: 09/22/1964
• Est. Priority Date: 03/13/1961
• Status: Expired due to Term

• Current Assignee: Nissan Zelmanoff
• Original Assignee: Nissan Zelmanoff
• Inventors: NISSAN ZELMANOFF
• Application Number:
  US04/095,008
• Time in Patent Office: 1,289 Days
• US Class Current: 106/792
• CPC Class Codes: C04B 14/06 Quartz; Sand
• CPC Class Codes: C04B 14/26 Carbonates
• CPC Class Codes: C04B 18/241 Paper, e.g. waste paper; Paper pulp
• CPC Class Codes: C04B 18/26 Wood, e.g. sawdust, wood shavings
• CPC Class Codes: C04B 28/10 Lime cements or magnesium oxide cements
• CPC Class Codes: C04B 40/0231 Carbon dioxide hardening
• CPC Class Codes: Y02W 30/91 Use of waste materials as fillers for mortars or concrete

Claims

1. A PROCESS FOR THE MANUFACTURE OF ARTIFICIAL STONE ARTICLES OF HIGH MECHANICAL STRENGTH WHICH COMPRISES, PROVIDING AN ALKALINE EARTH HYDROXIDE SELECTED FROM THE GROUP CONSISTING OF CALCIUM HYDROXIDE AND A MIXTURE OF CALCIUM AND MAGNESIUM HYDROXIDE CONTAINING SUFFICIENT WATER TO FORM A PLASTIC MASS, FORMING SAID MASS INTO AN ARTICLE OF THE DESIRED CONFIGURATION, SUBJECTING SAID ARTICLE TO CARBONATION BY REACTING IT WITH A GASEOUS ATMOSPHERE CONTAINING AT LEAST ABOUT 10% CARBON DIOXIDE AND MOISTURE IN NON-SATURATING AMOUNTS CORRESPONDING TO A RELATIVE HUMIDITY FALLING WITHIN THE RANGE OF ABOUT 10% TO 99.9% AT A TEMPERATURE RANGING FROM ABOUT 35*F. TO 200*F. TO MAINTAIN THE WATER CONTENT OF THE HYDROXIDE IN THE RANGE OF ABOUT 0.9 TO 10% BASED ON THE HYDROXIDE CONTENT AND SUBSTANTIALLY IN EQUILIBRIUM WITH THE MOISTURE IN THE GASEOUS ATMOSPHERE.