IOWA RESEARCH WITH CHEM-CRETE BITUMEN. FINAL REPORT

The primary objective of this research was to determine if Chem-Crete Bitumen would provide significantly improved performance of the mix designs used. The secondary objective was to determine if a satisfactory asphalt concrete base could be made using a poorly graded sand. Two roadways were selected in Story County to evaluate the performance of Chem-Crete Bitumen. The following conclusions were made: 1. Based on the comparative test sections with and without the asphalt modifier, Chem-Crete had a very detrimental effect on the Type B mix used. Severe cracking on the Chem-Crete section developed in the first year of service. 2. The asphalt concrete base mix using the Chem-Crete modifier and poorly graded sand was unsatisfactory. Severe cracking also developed in the first year of service. 3. The Chem-Crete sections will require substantial future maintenance. The seal coat applied to North Dakota will probably be inadequate and either overlay or removal will be required much earlier than normal. In January 1984 the crack filling on E-57 also appears to be inadequate and further work will be required.

• Record URL:
  http://publications.iowa.gov/id/eprint/13390
• 
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/24319
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/10833096
• Supplemental Notes:
  • Iowa Highway Research Board Project HR-226.
• Corporate Authors:

  Iowa Department of Transportation

  800 Lincoln Way
  Ames, IA  United States  50010
• Authors:
  • Jespersen, D
  • Jones, K B
• Publication Date: 1984

Language

• English

Media Info

• Features: Appendices; Figures;
• Pagination: 30 p.

Subject/Index Terms

• TRT Terms: Asphalt concrete; Base course (Pavements); Bitumen; Cracking; Maintenance; Materials tests; Mix design; Pavement performance; Sand
• Uncontrolled Terms: Base
• Geographic Terms: Iowa
• Old TRIS Terms: Bitumen tests; Chem-crete
• Subject Areas: Highways; Maintenance and Preservation; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00728832
• Record Type: Publication
• Files: NTL, TRIS, STATEDOT
• Created Date: Nov 26 1996 12:00AM