TOOLS AND RULES OF CONCRETE PLACEMENT

Current methods of concrete placement are examined in terms of both the equipment and the best ways of use of the equipment. The best tools for reaching lower elevations are chutes of flexible steel, or drop chutes (elephant trunks) of rubber or flexible plastic. Concrete buggies adapt to horizontal movement or traverse slopes to 5:1. Different types of manual and powered walk behind units are listed. In general, buggies should have pneumatic, cushion, or foam-filled tires to enhance speed and smoothness and minimize concrete segregation. Different types of buckets are described which are most efficient over vertical distances. Lighter magnesium buckets can be up to 1/4 yd. larger for a given crane capacity. Belt conveyors are especially adapted to long distances and high concrete volumes. Swinging and cantilevering units, swivel on a turntable, retract and extend up to 70 ft. They also cover larger areas. Different kinds of concrete pumps are mentioned. Pumped concrete has gone up to 576 ft., and 200 ft. along horizontal distances. The advantages of pumped concrete are reviewed. Twenty eight rules which establish economies are set forth.

  • Corporate Authors:

    McGraw-Hill, Incorporated

    330 West 42nd Street
    New York, NY  USA  10036
  • Publication Date: 1975-6

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Filing Info

  • Accession Number: 00098474
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 30 1975 12:00AM