D-CRACKING IN PCC PAVEMENTS: CAUSE AND PREVENTION
Field studies to arrest D-cracking in existing pavement by means of surface treatment with linseed oil in mineral spirits, with a commercial silicone, and with a commercial resin sealer were unsuccessful over 6 years of service. Vertical drains (wicks) for the purpose of removing base course moisture proved totally ineffective. Laboratory studies demonstrated conclusively that (Kansas) limestones contain no free lime; that the grinding of reactive river sands and gravels to high fineness to inhibit the alkali-aggregate reaction (actually to accelerate it to completion prior to forming the concrete) proved unfeasible; that bubbling pressure techniques can be used to determine maximum pore size in limestone samples, but not to discriminate 'good' limestones from 'bad' limestones with respect to D-cracking potential; and that D-cracking can be induced in the laboratory.
Kansas State University, ManhattanDepartment of Applied Mechanics
Manhattan, KS USA 66502
Washington, DC USA 20590
Kansas State Highway CommissionState Office Building
Topeka, KS USA 66612
- Best, C H
- Publication Date: 1974-6
- Pagination: 121 p.
- TRT Terms: Aggregates; Coatings; Concrete pavements; Field tests; Fracture mechanics; Highways; Laboratory tests; Linseed oil; Pavement cracking; Pore water pressures; Portland cement; Resins; Silicones; Surface treating; Vertical drains
- Geographic Terms: Kansas
- Old TRIS Terms: Silicone resins
- Subject Areas: Geotechnology; Highways; Pavements;
- Accession Number: 00090437
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: KSU-EES-2472 Final Rpt.
- Files: NTIS, TRIS, USDOT
- Created Date: May 29 1975 12:00AM