Porous structures

• US 3,027,266 A
• Filed: 01/09/1958
• Issued: 03/27/1962
• Est. Priority Date: 02/19/1953
• Status: Expired due to Term

• Current Assignee: Sverre Wikne
• Original Assignee: Sverre Wikne
• Inventors: SVERRE WIKNE
• Application Number:
  US03/708,047
• Time in Patent Office: 1,538 Days
• US Class Current: 264/42
• CPC Class Codes: C04B 14/10 Clay sepiolite C04B14/042; grog C04B18/025
• CPC Class Codes: C04B 22/00 Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators , shrinkage compensating agents
• CPC Class Codes: C04B 24/14 Peptides; Proteins; Derivatives thereof
• CPC Class Codes: C04B 24/2623 Polyvinylalcohols; Polyvinylacetates
• CPC Class Codes: C04B 24/38 Polysaccharides or derivatives thereof C04B24/243 takes precedence
• CPC Class Codes: C04B 28/02 containing hydraulic cements other than calcium sulfates
• CPC Class Codes: C04B 38/0045 by a process involving the formation of a sol or a gel, e.g. sol-gel or precipitation processes

Claims

1. THE METHOD OF MAKING POROUS STRUCTURES COMPRISING MIXING A PLASTIC WATER-CONTAINING HYDRAULIC CEMENT WITH SOLID MECHANICALLY DURABLE PELLETS CONSISTING ESSENTIALLY OF AN AQUEOUS MECHANICALLY RIGID GEL CAPABLE OF BEING DRIED TO PARTICLES OF REDUCED DIMENSIONS, THEREBY DISTRIBUTING SAID PELLETS WITHIN SAID CEMENT AS DISCRETE SOLID PIECES DEFINING PORES WITHIN A STRUCTURAL BOND OF CEMENT, FORMING SAID MIXTURRE, AND PERMITTING THE CEMENT TO HARDEN AND THE GEL WATER TO EVAPORATE FROM SAID PELLETS, WHEREBY A POROUS STRUCTURE IS FORMED.