Concrete admixture device and method of using same

• US 4,961,790 A
• Filed: 05/19/1989
• Issued: 10/09/1990
• Est. Priority Date: 05/19/1989
• Status: Expired due to Term

• Current Assignee: Fritz Chemical Company
• Original Assignee: Fritz Chemical Company
• Inventors: Smith, Dwight, Edwards, Jack L.
• Primary Examiner(s): Dixon, Jr., William R.
• Assistant Examiner(s): Bonner, Melissa
• Application Number:
  US07/354,299
• Time in Patent Office: 508 Days
• Field of Search: 206/219, 206/828, 106/96, 106/85
• US Class Current: 106/823
• CPC Class Codes: B28C 5/003 Methods for mixing B28C5/386, B28C5/402 take precedence
• 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 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: C04B 40/0633 Chemical separation of ingredients, e.g. slowly soluble activator
• CPC Class Codes: Y10S 106/90 Soil stabilization

Abstract

A device comprising a solid or powdered concrete admixture contained in a water-soluble container such that when the container and its contents are introduced into a wet mixer and agitated for a period of time, the water-soluble container is dissolved and the contents are released into the wet mixer. A separate water-insoluble receptacle is used to house and store the water-soluble container and its contents. In addition, there is disclosed a method for modifying the properties of a concrete by introducing a pre-weighed amount of solid admixture contained in a water-soluble container into a wet mixer and thereafter agitating the resulting mix.

Claims

1. A method for modifying the properties of a concrete comprising:

introducing a solid admixture, contained in a water-soluble container, into a wet mixer to give a resulting mix, said solid admixture being selected from the group consisting of air-entraining admixtures, air detrainer admixture, accelerating admixture, alkali-reactivity reducer, superplasticizer, pumping aids, water-reducing admixture, corrosion inhibitor, permeability reducer, and fibers;

said water-soluble container being selected from the group consisting of polyvinyl alcohol container and polyethylene oxide container; and

thereafter agitating said resulting mix for a sufficient amount of time to dissolve said water-soluble container and to disperse the mixture in the concrete in a substantially uniform fashion.

2. A method for retarding the setting of a concrete comprising:

introducing a solid retarding admixture contained in a water-soluble container, into a wet mixer to give a resulting mix, said water-soluble container being selected from the group consisting of polyvinyl alcohol container and polyethylene oxide container; and

thereafter agitating said resulting mix for a sufficient amount of time to dissolve said water-soluble container and to disperse the mixture in the concrete in a substantially uniform fashion.

3. A method for retarding the setting of a concrete comprising:

introducing a solid lignosulfonate contained in a water-soluble container, into a wet mixer to give a resulting mix, said water-soluble container being selected from the group consisting of polyvinyl alcohol container and polyethylene oxide container; and

thereafter agitating said resulting mix for a sufficient amount of time to dissolve said water-soluble container and to disperse the mixture in the concrete in a substantially uniform fashion.