AN INCREASINGLY USED MATERIAL: LIGHTWEIGHT AGGREGATE CONCRETE

AFTER A BRIEF REVIEW OF THE USE OF NATURAL AND SYNTHETIC LIGHTWEIGHT AGGREGATES, (EXPANDED CLAY BEING AT THE PRESENT TIME THE MOST WIDELY USED LIGHTWEIGHT AGGREGATE), A CLASSIFICATION OF LIGHTWEIGHT AGGREGATES IS PRESENTED: NATURAL AGGREGATES OF VOLCANIC ORIGIN (PUMICE, POXXOLAN), AGGREGATES MANUFACTURED FROM BY-PRODUCTS, (SLAG), AND ARTIFICIAL AGGREGATES (VERMICULITE, PERLITE, POLYSTYRENE, EXPANDED SLAG SINTERED FLY-ASH, EXPANDED CLAY, EXPANDED SHALE AND SLATE). THE DENSITY OF LIGHTWEIGHT CONCRETE VARIES FROM 0.5 TO 1.8 T/CU M. A RELATION EXISTS BETWEEN THE DENSITY AND COMPRESSIVE STRENGTH AND BETWEEN THE THERMAL CONDUCTIVITY COEFFICIENT AND THERMAL EXPANSION. THE SHRINKING OF LIGHTWEIGHT CONCRETE IS COMPARABLE TO THAT OF HIGH-DENSITY CONCRETE, BUT THE CREEP IS MORE MARKED. THE ADVANTAGES OF THIS TYPE OF CONCRETE ARE DISCUSSED AND SOME EXAMPLES OF USE, IN PARTICULAR IN BRIDGE CONSTRUCTION, ARE GIVEN. TABLES SHOW LIGHTWEIGHT CONCRETE MANUFACTURE IN VARIOUS COUNTRIES, AND THE COMPARISON BETWEEN THE PRICE OF VARIOUS TYPES OF LIGHTWEIGHT AGGREGATES AND THAT OF TRADITIONAL MATERIALS. /IRRD-IRF/

  • Corporate Authors:

    Ciments Et Chaux /France

    ,    
  • Publication Date: 1971-7

Media Info

  • Features: Photos;
  • Pagination: p. 29-30
  • Serial:
    • Issue Number: 604

Subject/Index Terms

Filing Info

  • Accession Number: 00213180
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 23 1974 12:00AM