skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Expansible apparatus for removing the surface layer from a concrete object

Abstract

A method and apparatus for removing the surface layer from a concrete object. The method consists of providing a hole having a circular wall in the surface layer of the object, the hole being at least as deep as the thickness of the surface layer to be removed, and applying an outward wedging pressure on the wall of the hole sufficient to spall the surface layer around the hole. By the proper spacing of an appropriate number of holes, it is possible to remove the entire surface layer from an object. The apparatus consists of an elongated tubular-shaped body having a relatively short handle with a solid wall at one end, the wall of the remainder of the body containing a plurality of evenly spaced longitudinal cuts to form a relatively long expandable section, the outer end of the expandable section having an expandable, wedge-shaped spalling edge extending from the outer surface of the wall, perpendicular to the longitudinal axis of the body, and expanding means in the body for outwardly expanding the expandable section and forcing the spalling edge into the wall of a hole with sufficient outward pressure to spall away the surface layer of concrete. The methodmore » and apparatus are particularly suitable for removing surface layers of concrete which are radioactively contaminated.« less

Inventors:
 [1]
  1. (Pasco, WA)
Issue Date:
Research Org.:
BATTELLE MEMORIAL INSTITUTE
OSTI Identifier:
863338
Patent Number(s):
4152028
Assignee:
United States of America as represented by United States (Washington, DC) PNNL
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
expansible; apparatus; removing; surface; layer; concrete; method; consists; providing; circular; wall; deep; thickness; removed; applying; outward; wedging; pressure; sufficient; spall; proper; spacing; appropriate; holes; remove; entire; elongated; tubular-shaped; relatively; handle; solid; remainder; containing; plurality; spaced; longitudinal; cuts; form; expandable; section; outer; wedge-shaped; spalling; edge; extending; perpendicular; axis; expanding; means; outwardly; forcing; particularly; suitable; layers; radioactively; contaminated; method consists; elongated tubular; apparatus consists; particularly suitable; outer surface; longitudinal axis; surface layer; entire surface; surface layers; radioactively contaminated; removing surface; circular wall; moving surface; /299/

Citation Formats

Allen, Charles H. Expansible apparatus for removing the surface layer from a concrete object. United States: N. p., 1979. Web.
Allen, Charles H. Expansible apparatus for removing the surface layer from a concrete object. United States.
Allen, Charles H. Mon . "Expansible apparatus for removing the surface layer from a concrete object". United States. https://www.osti.gov/servlets/purl/863338.
@article{osti_863338,
title = {Expansible apparatus for removing the surface layer from a concrete object},
author = {Allen, Charles H.},
abstractNote = {A method and apparatus for removing the surface layer from a concrete object. The method consists of providing a hole having a circular wall in the surface layer of the object, the hole being at least as deep as the thickness of the surface layer to be removed, and applying an outward wedging pressure on the wall of the hole sufficient to spall the surface layer around the hole. By the proper spacing of an appropriate number of holes, it is possible to remove the entire surface layer from an object. The apparatus consists of an elongated tubular-shaped body having a relatively short handle with a solid wall at one end, the wall of the remainder of the body containing a plurality of evenly spaced longitudinal cuts to form a relatively long expandable section, the outer end of the expandable section having an expandable, wedge-shaped spalling edge extending from the outer surface of the wall, perpendicular to the longitudinal axis of the body, and expanding means in the body for outwardly expanding the expandable section and forcing the spalling edge into the wall of a hole with sufficient outward pressure to spall away the surface layer of concrete. The method and apparatus are particularly suitable for removing surface layers of concrete which are radioactively contaminated.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {1}
}

Patent:

Save / Share: