This feature contains articles on the cost and availability of ready-mixed concrete and the practical value of the ram machine. Also included are articles on the effects of the method of placement and a survey of new types of materials. The price of ready-mixed concrete has risen rapidly over the past few years and consequently demand has fallen. The decline of road building is bound to affect the industry and arc think that trade will never recover to the 1973 level. The ram machine has proved useful for detecting major errors in the cement content but the article questions its accuracy for use in compliance testing. It is uncertain that compliance limits could be obtained with the machine; C and ca are currently analysing results from the tests on the M69 which should solve the problem. The economics of flowing concrete and other methods of placing are discussed. Criteria for determining the most suitable placing method are given. High volumes can be poured continuously in one high rate operation. It is estimated that polyester and epoxy concrete are 100 times more expensive than conventional concrete; lightweight concrete costs twice as much. The article describes situations where the use of such materials could be advantageous. /TRRL/

  • Corporate Authors:

    Dresser Transportation Equipment Division

    2 Main Street
    Depew, NY  United States  14043
  • Authors:
    • HEAYES, N
    • Gosney, J
    • Atkinson, I
  • Publication Date: 1977-2-24


  • English

Media Info

  • Features: Figures; Photos;
  • Pagination: 9 p.
  • Serial:
    • Car Design Inputs
    • Volume: 275
    • Issue Number: 5086
    • Publisher: Dresser Transportation Equipment Division

Subject/Index Terms

Filing Info

  • Accession Number: 00156457
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Analytic
  • Files: ITRD, TRIS
  • Created Date: Oct 13 1977 12:00AM