FAST FIX PAVEMENT REPAIR

FOR A NUMBER OF YEARS, THE AIR FORCE HAS SOUGHT IMPROVED METHODS AND MATERIALS FOR RAPID REPAIR OF AIRFIELD PAVEMENTS DAMAGED BY ENEMY FIRE. THE BASIC TECHNIQUES USED HAVE NOT BEEN ALTOGETHER SATISFACTORY. LABORATORY AND FIELD TESTS HAVE BEEN MADE OF SEVERAL ORGANIC AND INORGANIC MATERIALS INCLUDING POLYESTER RESINS, VINYLESTER RESINS, AND GYPSUM CEMENTS COMBINED WITH A SMALL QUANTITY OF PORTLAND CEMENT. A RATING SYSTEM, BASED UPON SUCH FACTORS AS COST, STRENGTH, SET TIME, CURING TIME, AND SIMPLICITY OF APPLICATION EQUIPMENT, WAS USED IN THE SELECTION OF THE BEST MATERIAL FOR WHICH THE SYSTEM COULD BE DEVELOPED. THE MATERIAL SELECTED IS CALLED FAST FIX. THREE BLENDS WERE DEVELOPED. FAST FIX 1 HAS BEEN USED MOST OFTEN IN FIELD TESTS. IT CONSISTS, BY WEIGHT, OF 95 PERCENT GYPSUM HYDROSTONE CEMENT AND 5 PERCENT TYPE I PORTLAND CEMENT, TO WHICH IS ADDED A SMALL QUANTITY OF TF-4, A WETTING AGENT, TO PRODUCE A HIGH-SLUMP MIXTURE AT A LOW WATER-CEMENT RATIO. FAST FIX 1 GELS 7 MINUTES AFTER WATER IS ADDED; IT SETS IN 12 MINUTES, AND MAY BE LOADED AT AGE 30 MINUTES. FAST FIX 2 AND FAST FIX 3 ARE MIXTURES OF OTHER GYPSUM CEMENTS AND DIFFERENT QUANTITIES OF PORTLAND CEMENT. SET TIME CAN BE EXTENDED WITH SEVERAL RETARDING AGENTS AMONG WHICH ARE WR-1 (A PROPRIETARY PRODUCT), SODIUM CITRATE, AND SUGAR. SUGAR IS RECOMMENDED ONLY TO RETARD THE SET PERMANENTLY OR "KILL" THE MIX. /AUTHOR/

• Supplemental Notes:
  • Vol 61, No 403, PP 352-353
• Authors:
  • Carstensen, J R
  • Nabors, W M
• Publication Date: 1969-9

Media Info

• Serial:
  • Military Engineer
  • Publisher: Society of Military Engineers

Subject/Index Terms

• TRT Terms: Airport runways; Defects; Gypsum cement; Pavement distress; Pavement maintenance; Pavements; Polyester resins; Portland cement; Resins; Vinyl resins
• Subject Areas: Highways; Maintenance and Preservation; Pavements;

Filing Info

• Accession Number: 00218530
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 29 1994 12:00AM