EXTRUSILE HYDRAULIC CEMENT COMPOSITIONS CONTAINING ALKALI AND CARBOHYDRATE

• US 3,857,715 A
• Filed: 03/01/1972
• Issued: 12/31/1974
• Est. Priority Date: 03/01/1972
• Status: Expired due to Term

• Current Assignee: Elma B., Surviving Spouse Of Clyde W. Humphrey, Dec'D. Humphrey
• Original Assignee: Clyde W. Humphrey
• Inventors: Humphrey, Clyde W.
• Primary Examiner(s): Gantz, Delbert E.
• Assistant Examiner(s): Berger, S.
• Application Number:
  US05/231,020
• Time in Patent Office: 1,035 Days
• Field of Search: 106/92
• US Class Current: 106/729
• CPC Class Codes: C04B 22/062 of the alkali or alkaline-earth metals
• CPC Class Codes: C04B 24/10 Carbohydrates or derivatives thereof
• CPC Class Codes: C04B 24/38 Polysaccharides or derivatives thereof C04B24/243 takes precedence
• CPC Class Codes: C04B 24/383 Cellulose or derivatives thereof
• CPC Class Codes: C04B 28/02 containing hydraulic cements other than calcium sulfates

Abstract

A hydraulic cement-containing product is made from a hydraulic cement admixture containing a low concentration of water by employing a hydraulic cement admixture prepared by homogeneously admixing into a dry mix of a hydraulic cement and aggregate, first, an aqueous solution of a water-soluble alkali compound, such as ammonium hydroxide, and then a water-soluble carbohydrate, such as molasses, and water sufficient to provide an admixture that is cohesive and plastic. Because of the low water content of the hydraulic cement admixture, products made therefrom have good ultimate properties and can be made by an extrusion process in addition to the conventional molding process.

Claims

1. FIRST, AN AQUEOUS SOLUTION OF A WATER-SOLUBLE ALKALI COMPOUND SELECTED FROM THE CLASS CONSISTING OF A SODIUM COMPOUND, POTASSIUM COMPOUND, AND NITROGEN COMPOUND THAT HAS A 0.1NPH IN WATER OF 11.0 OR GREATER, AND

2. The method of claim 1 wherein the alkali compound is potassium hydroxide, sodium hydroxide, ammonium hydroxide or mixtures thereof.

3. The method of claim 1 wherein the carbohydrate is a sugar, a starch, or mixtures thereof.

4. The method of claim 3 wherein the carbohydrate is added as an aqueous solution and the solution contains a surfactant that reduces the surface tension of the carbohydrate solution.

5. The method of claim 1 wherein the carbohydrate is a sugar and the alkali compound is ammonium hydroxide.

6. The method of claim 1 wherein the carbohydrate is molasses and the alkali compound is ammonium hydroxide.

7. The method of claim 6 wherein the molasses contains a surfactant that reduces the surface tension of the molasses.

8. The method of claim 7 wherein the molasses is used in a quantity that supplies at least about 1.0 parts of sugar solids per 100 parts of the hydraulic cement.

9. The method of claim 1 wherein the carbohydrate is a starch.

10. The method of claim 1 wherein the carbohydrate is a sugar.