Hydraulic cement panel with low density core and fiber reinforced high density surface layers

• US 3,284,980 A
• Filed: 07/15/1964
• Issued: 11/15/1966
• Est. Priority Date: 07/15/1964
• Status: Expired due to Term

• Current Assignee: Paul E. Dinkel
• Original Assignee: Paul E. Dinkel
• Inventors: Dinkel, Paul E.
• Application Number:
  US04/384,043
• Time in Patent Office: 853 Days
• US Class Current: 52/600
• CPC Class Codes: C04B 14/08 Diatomaceous earth
• CPC Class Codes: C04B 14/16 porous, e.g. pumice
• CPC Class Codes: C04B 14/18 Perlite
• CPC Class Codes: C04B 14/202 Vermiculite
• CPC Class Codes: C04B 18/141 Slags
• CPC Class Codes: C04B 2111/00612 as one or more layers of a layered structure
• CPC Class Codes: C04B 2111/27 Water resistance, i.e. waterproof or water-repellent materials
• CPC Class Codes: C04B 2111/40 Porous or lightweight materials
• CPC Class Codes: C04B 28/04 Portland cements
• CPC Class Codes: E04C 2/044 of concrete E04C2/049 takes precedence
• CPC Class Codes: E04C 2/26 composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups of cement and mineral fibres E04C2/04
• CPC Class Codes: Y02W 30/91 Use of waste materials as fillers for mortars or concrete

Claims

1. A NAILABLE, STRUCTURAL PANEL PARTICULARLY ADAPTED FOR USE IN AREAS OF EXPOSURE TO MOISTURE, SAID PANEL COMPRISING CENTRAL CORE OF SUBSTANTIAL LENGTH AND WIDTH COMPRISED THROUGHOUT ITS THICKNESS OF INORGANIC LIGHTWEIGHT AGGREGATE AND HYDRAULIC CEMENT, SAID CORE BEING CHARACTERIZED BY THE PRESENCE OF A MULTIPLICITY OF VOIDS AND CELLS WHICH CONFER ON THE CORE AN AVERAGE UNIT WEIGHT NOT SUBSTANTIALLY EXCEEDING 130 POUNDS PER CUBIC FOOT. A LAYER OF HIGH TENSILE STRENGTH FIBROUS MATERIAL DISPOSED CLOSELY ADJACENT THE CORE AT THE TWO OPPOSED FACES THEREOF AND A LAYER OF BONDING MATERIAL CONSISTING OF AT LEAST 50% HYDRAULIC CEMENT, SAID LAYER BEING SUBSTANTIALLY THINNER THAN SAID CORE, RELATIVELY LOW IN VOIDS AND OF HIGH UNIT WEIGHT RELATIVE TO SAID CORE AND AT LEAST PARTIALLY PENETRATING THE VOIDS AND FILLING THE SURFACE IRREGULARITIES AT THE FACE OF SAID CORE THEREBY BONDING THE RESPECTIVE FIBROUS LAYERS TO THE OPPOSED SURFACES OF THE CORE TO FORM AN INTEGRAL STRUCTURE.