DRAINAGE CONTROVERSIES INVOLVE MATERIAL USE. CONTROVERSY #3: ASR LEAD STATES TEAM ROLLS OUT GUIDE SPECS

Alkali-silica reactivity (ASR) is a pervasive problem in almost all states, occurring beneath the surface of portland cement concrete (PCC) and causing cracks, spalling, and other damage to pavements and structures. ASR occurs when silica in some aggregates and alkalis in cement form a gel-like substance on the aggregate surface. As the gel expands, it causes the concrete to crack. Over time, these cracks can cause permanent damage and even structural damage. This article describes a draft guide specification prepared by the ASR Lead States team (New Mexico, North Carolina, Pennsylvania, South Dakota, and Virginia) to aid highway agencies and others in learning how to protect new PCC roads and bridges from ASR.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/1519687
• Corporate Authors:

  N/A

  P.O. Box 558
  Park Ridge, IL  United States  60068
• Publication Date: 2000-3

Language

• English

Media Info

• Pagination: p. 21
• Serial:
  • Better Roads
  • Volume: 70
  • Issue Number: 3
  • Publisher: James Informational Media, Incorporated
  • ISSN: 0006-0208
  • Serial URL: http://www.betterroads.com

Subject/Index Terms

• TRT Terms: Alkali silica reactions; Concrete pavements; Cracking; Highway departments; Highway transportation; Pavements; Portland cement concrete; Roads; Silica gel; Spalling; Structural deterioration and defects; Surface course (Pavements)
• Identifier Terms: Asr Lead States Team
• Geographic Terms: New Mexico; North Carolina; Pennsylvania; South Dakota; United States; Virginia
• Subject Areas: Bridges and other structures; Design; Highways; Materials; Pavements; I23: Properties of Road Surfaces; I24: Design of Bridges and Retaining Walls; I32: Concrete;

Filing Info

• Accession Number: 00792556
• Record Type: Publication
• Files: TRIS
• Created Date: May 8 2000 12:00AM