AFFINITY OF HYDROPHILIC AGGREGATE FOR ASPHALTIC BITUMEN: USE OF FURFURAL AND ITS RESINOUS DERIVATIVES FOR IMPROVING AFFINITY

AN ATTEMPT IS MADE TO POINT OUT THE FACTORS WHICH ARE OF GREATEST IMPORTANCE IN THE ADHESION PROBLEM OF MINERAL AGGREGATES AND TO PROPOSE A CURE FOR AT LEAST SOME OF THE ILLS CAUSED BY THE IMPROPER AFFINITY OF THE AGGREGATE FOR THE BITUMEN. THE INFLUENCE OF DIFFERENT PRETREATMENTS ON THE STRIPPING RESISTANCE OF BITUMEN-COATED AGGREGATE WAS DETERMINED WITH THE USE OF A WASH TEST. THE DIFFERENT PRETREATMENTS INCLUDED WASHING OF THE AGGREGATE (BEFORE COATING ) WITH DISTILLED WATER, AQUEOUS HYDROCHLORIC ACID SOLUTION, AND AQUA REGIA, RESPECTIVELY, AND PRIMING WITH ANILINE, PHENOL, FURFURAL, ANILINE,-FURFURAL, PHENOL- FURFURAL, AND LEAD ACETATE, RESPECTIVELY. IN CERTAIN CASES THE WASH TEST WAS PRECEEDED BY CURING PERIODS IN AIR OR IN WATER. DATA OBTAINED INDICATE THAT: (1) THE STRIPPING RESISTANCE OF BITUMEN-COATED AGGREGATE DEPENDS UPON THE PROPERTIES OF THE BITUMEN, THE SURFACE PROPERTIES OF THE MINERAL, AND THE TIME AND CONDITION OF CONTACT BETWEEN BITUMEN AND MINERAL SURFACE, (2) SOAKING FOLLOWED BY THE WASH TEST IS A MORE TIME-CONSUMING BUT ALSO A MORE DISCRIMINATING PROCEDURE, (3) THE EFFECT OF WASHING THE AGGREGATE WITH HYDROCHLORIC ACID AND AQUA REGIA BEFORE COATING DEPENDS ON THE CHARACTER OF THE MINERAL SURFACE AND THAT OF THE BITUMEN, (4) WASHING WITH AQUA REGIA TENDS TO IMPROVE THE ADHESIVENESS MORE THAN WASHING WITH HYDROCHLORIC ACID, (5) WITH THREE GRAVELS FROM ALABAMA THE AVERAGE INFLUENCE OF PRIMING WITH FURFURAL AND ITS DERIVITIVES ON STRIPPING RESISTANCE IS PRESENTED IN AN AVERAGE RATING (6) WITH JOPLIN CHAT THE AVERAGE EFFECT OF WASHING OR PRIMING ON THE STRIPPING RESISTANCE IS PRESENTED IN A RATING. SPECIMENS CONTAINING ANILINE-FURFURAL, HIGH- TEMPERATURE TAR-FURFURAL, AND LOW-TEMPERATURE TAR-FURFURAL ADMIXTURES SHOWED BETTER RESISTANCE TO WATER THAN SAMPLES WHICH DID NOT CONTAIN THESE MATERIALS.

  • Supplemental Notes:
    • Vol 30, pp 1362-1368, 8 TAB, 4 PHOT, 3 REF
  • Authors:
    • Winterkorn, H F
  • Publication Date: 1938

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  • Accession Number: 00211011
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 24 1994 12:00AM