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REPORT OF COMMITTEE ON EFFECT OF ICE CONTROL

THIS REPORT IS A SUMMARY OF REPLIES TO A QUESTIONNAIRE PREPARED BY THE COMMITTEE ON EFFECT OF ICE CONTROL AND SENT TO HIGHWAY DEPARTMENTS OF THE 37 STATES WHICH WERE CONSIDERED TO BE IN THE SNOW-BELT AREA. THE QUESTIONNAIRE WAS DESIGNED TO ASCERTAIN HOW AND TO WHAT EXTENT THE INDIVIDUAL STATES WERE CONTROLLING SNOW AND ICE CONDITIONS ON CONCRETE PAVEMENTS THROUGH THE USE OF CHEMICALS AND THE EFFECTS THESE CHEMICALS HAVE ON CONCRETE PAVEMENT, CURBS, RAILINGS, ETC. THE CHEMICALS OF PARTICULAR IMPORTANCE IN THIS STUDY ARE SODIUM CHLORIDE AND CALCIUM CHLORIDE. FINDINGS FROM THIS SURVEY INCLUDE: (1) ALL OF THE STATES CONSIDERED IN THIS SURVEY USED EITHER SODIUM OR CALCIUM CHLORIDE. FIFTY-EIGHT PERCENT USED BOTH OF THESE CHLORIDES FOR WINTER ROAD MAINTENANCE. ONLY TWO STATES USED RUST INHIBITORS AND THESE TO A VERY LIMITED EXTENT. (2) NEARLY 88 PERCENT OF THE STATES INDICATED SOME FORM OF DAMAGE ON CONCRETE RESULTING FROM THE USE OF CHLORIDES. EXTENT OF DAMAGE WAS VARIED SINCE VARIABLE AMOUNTS OF CHLORIDES WERE USED. (3) ABOUT 76 PERCENT USED THE CLEAR METHOD OF CHLORIDE BROADCAST. ALL OF THE STATES USED THE ABRASIVE METHOD. (4) IT WAS CONSIDERED BEST BY MOST STATES THAT NEW CONCRETE SHOULD HAVE TIME TO AGE 3 YEARS BEFORE CHLORIDES WERE APPLIED ON IT. (5) RELATIVELY FEW STATES HAVE UNDERTAKEN RESEARCH TO ANY GREAT EXTENT CONCERNING CHLORIDE EFFECTS ON CONCRETE. (6) THE STATES USED CHLORIDES IN VARYING AMOUNTS OVER THE ROADS. SODIUM CHLORIDE IN THE CLEAR AVERAGED ABOUT 400 LB. PER MILE, AND WITH ABRASIVE, ABOUT 300 LB. PER CU. YD. CALCIUM CHLORIDE IN THE CLEAR AVERAGED ABOUT 200 LB. PER MILE AND WITH ABRASIVE, ABOUT 300 LB. PER CU. YD. CALCIUM CHLORIDE WAS MORE GENERALLY FAVORED WITH ABRASIVES WHILE SODIUM CHLORIDE WAS MORE GENERALLY FAVORED IN THE CLEAR. (7) THERE WAS NO GENERAL AGREEMENT OF TIME AS TO WHEN CHLORIDES WERE APPLIED TO THE ROAD. (8) CHLORIDES WERE GENERALLY BROADCAST OVER THE ROADS BY MECHANICAL SPREADERS OR BY HAND, OR BOTH. (9) EVEN THOUGH MANY STATES INDICATED VARYING DAMAGE TO ROADS FROM CHLORIDE APPLICATION, 67 PERCENT OF THEM SAID THAT DIRECT APPLICATION OF THE CHEMICALS WAS JUSTIFIED WHEN CONSIDERING TIME SAVED TO TRAVELING PUBLIC, REDUCTION IN DRIVING HAZARDS, ETC. SOME STATES INDICATED THAT CARE SHOULD BE TAKEN IN CONTROLLING THE AMOUNTS OF CHLORIDE TO REDUCE DAMAGE. (10) OF THE SEVERAL STATES HAVING HAD EXPERINECE WITH AIR-ENTRAINED CONCRETE FOR ANY LENGTH OF TIME, THEY SEEM TO GENERALLY AGREE THAT AIR-ENTRAINED CONCRETE IS MORE RESISTANT TO CHLORIDES THAN IS PLAIN CONCRETE.

  • Supplemental Notes:
    • Vol 25, No 9, PP 31-39, 3 TAB
  • Authors:
    • Healy, R T
  • Publication Date: 1955-10

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Filing Info

  • Accession Number: 00218925
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: May 29 1972 12:00AM