CEMENTITIOUS ROOFING AND SIDING

• US 3,841,885 A
• Filed: 11/06/1972
• Issued: 10/15/1974
• Est. Priority Date: 11/06/1972
• Status: Expired due to Term

• Current Assignee: Cal-Shake Incorporated
• Original Assignee: Gus R. Jakel
• Inventors: Jakel, Gus R.
• Primary Examiner(s): Poer, James E.
• Application Number:
  US05/303,677
• Time in Patent Office: 708 Days
• Field of Search: 106/95,99,93
• US Class Current: 106/663
• CPC Class Codes: B28B 1/10 and applying pressure otherwise than by the use of presses
• CPC Class Codes: B28B 11/10 by using presses
• CPC Class Codes: B28B 5/022 the moulds or the moulding surfaces being individual independant units and being discontinuously fed feeding B28B13/0215 and sub-groups
• CPC Class Codes: B28B 5/04 in moulds moved in succession past one or more shaping stations on turn-tables B28B5/06
• CPC Class Codes: C04B 28/04 Portland cements

Abstract

The process of making a nailable, lightweight, fireproof and waterproof construction slab includes: A. COMBINING Portland cement, perlite, glass fiber, cellulose pulp, slaked lime and water to form an aqueous admixture, and B. FORMING AND CURING THE SLAB FROM SAID ADMIXTURE, SAID CURING INCLUDING SUBJECTING THE FORMED SLAB TO PRESSURIZATION TO SQUEEZE WATER THEREFROM.

Claims

1. IN THE PROCESS OF MAKING A LIGHTWEIGHT, FREPROOF AND WATERPROOF CONSTRUCTION SLAB, HTE STEPS THAT INCLUDE:

A. COMBINING PORTLAND CEMENT, PERILTE, GLASS FIBER, CELLULOSE PULP, A SUB-MIX AND WATER TO FORM AN AQUEOUS ADMIXTURE, AND B. FORMING THE CURING THE SLAB FROM SAID ADMIXTURE, SAID FORMING INCLUDING SUBJECTING THE FORMED SLAB TO PRESSURIZATION TO SQUEEZE WATER THEREFROM, C. SAID SUB-MIX HAVING BEEN PARELIMINARILY PREPARED BY COMBINING QUICK LIME AND WATER TO FORM A MIX REACTING EXOTHERMICALLY, AND ADDING FATTY MATERIAL TO THE REACTING MIX, AND IN THE RELATIVE AMOUNTS BETWEEN 45 AND 55 POUNDS OF QUICK LIME BETWEEN 25 AND 30 GALLONS OF WATER BETWEEN 1.5 AND 2.5 GALLONS OF FATTY MATERIAL D. THE CONSTITUENTS OF THE ADMIXTURE BEING PRESENT IN THE RELATIVE AMOUNT;

BETWEEN ABOUT 180 AND 195 POUNDS OF CEMENT BETWEEN ABOUT 72 AND 90 POUNDS OF PERLITE BETWEEN ABOUT 38 AND 46 GALLONS OF AQUEOUS CELLULOSE PULP CONTAINING SAID GLASS FIBER, AND BETWEEN ABOUT 7 AND 9 GALLONS OF SAID SUB-MIX E. THE PULP AND GLASS FIBER BEING PRESENT IN THE RELATIVE AMOUNTS;

BETWEEN 40 AND 48 POUNDS OF CELLULOSE BETWEEN AND 4 POUNDS OF GLASS FIBER.

2. The method of claim 1 wherein the slab is formed as a tapered shingle.

3. The product slab formed by the process of claim 1.

4. The process of claim 1 wherein said fatty material consists of tallow.

5. The process of claim 1 wherein chloride salts of potassium and calcium and calcium nitrate are also combined in the admixture.

6. The product slab in the form of a shingle formed by the process of claim 1.

7. The process of claim 1 wherein an air entraining agent is combined in the admixture.

8. The process of claim 1 wherein the admixture also contains between 4 and 8 ounces of air entraining agent, in relative amount.

9. The process of claim 1 wherein the admixture also contains salts of copper and calcium, said salts consisting of chloride salts of copper and calcium and calcium nitrate.