FORECASTING THE SUSCEPTIBILITY OF CIVIL ENGINEERING MATERIALS TO WEATHERING /IN FRENCH/

THROUGH CHANGES IN THEIR ENVIRONMENT, NATURAL ROCK MATERIALS USED IN CIVIL ENGINEERING CONSTRUCTION CAN ALTER, ENDANGERING THE STABILITY OF STRUCTURES. THIS PROCESS, DIFFERENT FROM WEATHERING IN GEOLOGY, GEOMORPHOLOGY, OR PEDOLOGY, IS CONNECTED WITH THE SPECIFIC CONDITIONS OF EACH STRUCTURE AND IS VERY RAPID. TO FORECAST WEATHERING AT THE PROJECT STAGE AND ON THE SITE, THE PROPERTIES OF THE MATERIALS AND THEIR CONDITIONS OF USE MUST BE TAKEN INTO ACCOUNT, AND SIMPLE AND RAPID QUANTITATIVE TESTS MUST BE CONDUCTED. A STUDY IS MADE OF THE MECHANISM OF WEATHERING, AND THE CRITERIA USED FOR PREDICTING THE MAIN CAUSES OF DISORDER IN NATURAL ROCKS USED IN CIVIL ENGINEERING ARE LISTED: (1) DECREASE IN STRENGTH AND DISINTEGRATION OF ROCKS CONTAINING ACID FELDSPAR BY DISSOLUTION OF LEACHING BY- PRODUCTS IN COMPOSITE, BASIC, ACID, OR LATERIC MEDIA; (2) DECREASE IN STRENGTH AND DISINTEGRATION BY SWELLING OF CLAYEY MINERALS OR HYDROXIDES; (3) SLAKING; (4) FROST; (5) CRYSTALLIZATION OF EVAPORATES; (6) FORMATION OF WATER VAPOR IN HOT-COATED AGGREGATES; (7) SUPERFICIAL PROGRESSIVE ACIDIFICATION OF AGGREGATES SUBJECTED TO LEACHING, AND (8) PRECIPITATION OF IRON HYDROXIDE ON THE SURFACE OF STORED AGGREGATES. SIMPLE AND RAPID TESTS ARE PROPOSED FOR EACH OF THESE PHENOMENA. /LCPC(A)/RRL/

  • Supplemental Notes:
    • No 42, pp 35-46, 6 FIG, 4 TAB, 5 REF
  • Authors:
    • Struillou, R
  • Publication Date: 0

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00229344
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Jul 2 1971 12:00AM