Lightweight concrete composition

• US 6,402,830 B1
• Filed: 11/20/2000
• Issued: 06/11/2002
• Est. Priority Date: 11/20/2000
• Status: Expired due to Fees

• Current Assignee: Randy C. Schaffer
• Original Assignee: Randy C. Schaffer
• Inventors: Schaffer, Randy C.
• Primary Examiner(s): Wood, Elizabeth D.
• Application Number:
  US09/717,709
• Time in Patent Office: 568 Days
• Field of Search: 106/675, 106/721
• US Class Current: 106/675
• CPC Class Codes: C04B 14/16 porous, e.g. pumice
• CPC Class Codes: C04B 14/185 expanded
• CPC Class Codes: C04B 20/008 Micro- or nanosized fillers, e.g. micronised fillers with particle size smaller than that of the hydraulic binder colloidal silica C04B14/062 ; silica fume C04B18/146
• CPC Class Codes: C04B 28/04 Portland cements

Abstract

The invention is a lightweight, economical and durable concrete which is easily manufactured from commonly available materials, and its method of manufacture. The concrete composition comprises cement, perlite, pumice and water. The cement is common Portland cement. The perlite is an expanded perlite available. Preferably, the perlite is {fraction (3/16)}″ minus to dust in size. The pumice is common pumice aggregate. Preferably, the pumice is ¾″ minus to dust in size. Additional, optional, conventional components for adhesiveness, color, texture, hardening and drying time may also be added.

Claims

1. A lightweight, durable concrete composition comprising:

55-65 weight percent cement,

1-4 weight percent expanded perlite,

35-45 weight percent pumice,

and enough water to make a smooth slurry of the cement, perlite, pumice and water composition.

2. The concrete of claim 1 wherein the perlite is about {fraction (3/16)}″

minus to dust in size.

3. The concrete of claim 1 wherein the pumice is about ¾

″

minus to dust in size.

4. A method for making a lightweight, durable concrete composition comprising:

mixing 55-65 weight percent cement,

1—

4 weight percent expanded perlite,

35-45 weight percent pumice,

and enough water to make a smooth slurry of the cement, perlite, pumice and water composition.