ECONOMICAL AND EFFECTIVE DEICING AGENTS FOR USE ON HIGHWAY STRUCTURES

RESEARCH RESULTS ARE PRESENTED OF AN 18-MONTH EXPERIMENTAL PROGRAM DIRECTED TO THE DEVELOPMENT OF ECONOMICAL AND EFFECTIVE DEICING AGENTS TO MINIMIZE THE CORROSION OF STRUCTURAL STEEL ELEMENTS AND VEHICLES, AND THE FREEZE-THAW DETERIORATION OF CONCRETE. CORROSION EXPERIMENTS EMPLOYING SODIUM CHLORIDE AND CALCIUM CHLORIDE WERE CONDUCTED UNDER ENVIRONMENTS APPROXIMATING CRITICAL FIELD CONDITIONS FOR BOTH VEHICLES AND STRUCTURES, AND CORROSION RATES FOR TEST EXPERIMENTS WERE OBSERVED. SUBSEQUENT STUDIES WERE MADE TO DETERMINE THE POTENTIAL OF VARIOUS MATERIALS AS CORROSION INHIBITORS. THE STUDIES OF CONCRETE DETERIORATION BY DEICING CHEMICALS WAS APPROACHED IN A MANNER SIMILAR TO THAT USED FOR CORROSION STUDIES. A COMPOSITE DEICING AGENT OF UREA AND CALCIUM FORMATE HAVING AN EUTECTIC POINT OF MINUS 3F IS SUGGESTED TO INCREASE THE CORROSION RATE. FORMAMIDE CAN BE ADDED IF LOWER TEMPERATURE PERFORMANCE IS NEEDED. THE INCREASE IN CORROSION RATE ENCOUNTERED WITH CHLORIDE SOLUTIONS MAY BE ELIMINATED BY THE ADDITION OF A POLYPHOSPHATE-BASED MATERIAL OR A LONG-CHAIN AMINE TO THE SODIUM CHLORIDE SOLUTION. VARIOUS MATERIALS ADDED TO CHLORIDE DEICER SOLUTIONS REDUCED THE RATE OF FREEZE-THAW DETERIORATION. TYPICAL ADDITIVES WERE SEQUESTERING AGENTS SUCH AS THE SODIUM SALT OF ETHYLENEDIAMINE TETRACETIC ACID, AND POLYHYDROXY SUGAR- TYPE COMPOUNDS SUCH AS DEXTROSE. LONGER CURING PERIODS REDUCED THE RATE OF CEMENT MORTAR DETERIORATION DURING FREEZE-THAW TESTING AND REDUCED THE AMOUNT OF ADDITIVE NEEDED IN THE CHLORIDE SOLUTION TO AFFORD PROTECTION. THE COST OF DEICING IS MATERIALLY INCREASED WHEN THE DEICING METHODS FOUND TO BE LESS REACTIVE TO STEEL AND CONCRETE ARE USED.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/nchrp/nchrp_rpt_19.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00775614
• Supplemental Notes:
  • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Boies, D B
  • Bortz, S
• Publication Date: 1965

Media Info

• Media Type: Digital/other
• Serial:
  • NCHRP Report
  • Issue Number: 19
  • Publisher: Transportation Research Board
  • ISSN: 0077-5614

Subject/Index Terms

• TRT Terms: Additives; Calcium chloride; Cement mortars; Concrete; Corrosion protection; Corrosion tests; Costs; Deicers (Equipment); Freeze thaw durability; Freeze thaw tests; Phosphates; Sodium chloride; Structural steel; Urea; Vehicles
• Uncontrolled Terms: Calcium formate; Deicers
• Old TRIS Terms: Dextrose; Formamide; Sequestering agents
• Subject Areas: Finance; Highways; Maintenance and Preservation; Vehicles and Equipment;

Filing Info

• Accession Number: 00217985
• Record Type: Publication
• Files: TRIS, TRB, ATRI
• Created Date: Nov 7 1994 12:00AM