Air void analyzer for plastic concrete : technical summary report.

Details

• Creators:
  Eggers, John
• Corporate Creators:
  Louisiana Transportation Research Center
• Corporate Contributors:
  Louisiana. Dept. of Transportation and Development ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Concrete plastic composites
  • Air content
  • Polymer concrete
  • Air voids
  • Concrete--Air content--Testing
  • Concrete construction
• Publication/ Report Number:
  FHWA/LA/08-436
• Resource Type:
  Tech Report
• Geographical Coverage:
  Louisiana
• Edition:
  Technical summary report.
• Corporate Publisher:
  Louisiana Transportation Research Center
• Abstract:
  The best protection against freeze-thaw cycles in concrete is to have a good air void ; system. Although microscopic, concrete is a porous material. Conventional field tests, ; the volumetric or pressure tests, only provide the volume of air voids in the concrete. ; These tests do not offer any information on the size or spacing of the air voids. ; Petrographic analysis does provide this missing information but only on hardened ; concrete well after placement. The development of the air void analyzer (AVA) offers to ; provide volume and size distribution of entrained air voids (< 3 mm) to allow an ; estimation of the spacing factor and to give the specific surface and the total amount of ; entrained air all within 30 min. of sampling the fresh and still plastic concrete. This ; development allows for changes in the mix while placement operations are still ongoing.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/17105/dot_17105_DS1.pdf
• File Type:
  [PDF - 47.62 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:725e3c5c08bafcd11423bfda22e45d5bb02dcccb5fe1b647721de9fb4841d2e9