Package of cement mixing material

• US 5,224,595 A
• Filed: 11/06/1991
• Issued: 07/06/1993
• Est. Priority Date: 11/07/1990
• Status: Expired due to Term

• Current Assignee: Lion Corporation, Taisei Corporation
• Original Assignee: Lion Corporation, Taisei Corporation
• Inventors: Okada, Toshihiro, Nagase, Koichi, Sekiguchi, Yoshimitsu, Kurusu, Takehiko, Sugimoto, Kenji
• Primary Examiner(s): Bell, Mark L.
• Assistant Examiner(s): WRIGHT, ALAN
• Application Number:
  US07/788,680
• Time in Patent Office: 608 Days
• Field of Search: 206/321, 206/322, 206/219, 206/524.7, 106/823, 162/164.3
• US Class Current: 206/321
• CPC Class Codes: C04B 18/241 Paper, e.g. waste paper; Paper pulp
• CPC Class Codes: C04B 2103/0077 Packaging material remaining in the mixture after the mixing step, e.g. soluble bags containing active ingredients
• CPC Class Codes: C04B 24/26 obtained by reactions only involving carbon-to-carbon unsaturated bonds 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
• CPC Class Codes: C04B 40/0028 Aspects relating to the mixing step of the mortar preparation
• CPC Class Codes: C04B 40/06 Inhibiting the setting, e.g. mortars of the deferred action type containing water in breakable containers ; Inhibiting the action of active ingredients
• CPC Class Codes: Y02W 30/91 Use of waste materials as fillers for mortars or concrete

Abstract

Using a packaging material containing a fibrous substance such as pulp and a carboxyl-containing polymer a substance such as an acid type carboxymethyl cellulose, a cement mixing material such as a superplasticizer is packaged and the package is thrown into a cement formulation such as concrete, mortar or a cement paste in a truck agitator.

Claims

1. A substantially water-insoluble and alkali-hydrolyzable package comprising a fiber and a carboxyl-containing polymer, to be disintegrated in a cement admixture.

2. A package as claimed in claim 1, wherein said carboxyl-containing polymer is a polysaccharide derivative selected from the group consisting of carboxymethyl cellulose, carboxyethyl cellulose and carboxymethylated starch or salts thereof.

3. A package as claimed in claim 1, wherein said carboxyl-containing polymer is a homopolymer or a copolymer of a carboxyl-containing monomer.

4. A package as claimed in claim 1, wherein the weight ratio of the carboxyl-containing polymer to the fibrous material is 80/20 to 0.1/99.9.

5. A package as claimed in claim 1, wherein said fiber is pulp.

6. A package as claimed in claim 2, wherein said polysaccharide derivative is carboxymethyl cellulose.

7. A package as claimed in claim 1, wherein said package encompasses at least one member selected from the group consisting of a superplasticizer, an air-entraining agent, a water-reducing agent, a super water-reducing agent, a foaming agent, a gas foaming agent, a setting accelerator, a setting retarder, a rust or corrosion inhibitor, a permeability reducer, a shrinkage reducing agent, a coloring agent, and a reinforcing material.

9. A package as claimed in claim 1, wherein said carboxyl-containing polymer is selected from the group consisting of fibrous carboxymethyl cellulose, carboxyethyl cellulose and salts thereof.

8. A package for a constituent of a cement admixture consisting essentially of a carboxyl-containing polymer and a fiber, the package being alkali hydrolyzable, whereby the package is able to disintegrate in the cement admixture.