Implementation of the soil compactor analyzer into test method TEX-113-E : technical report.

Details

• Creators:
  Sebesta, Stephen ; Taylor, Ross
• Corporate Creators:
  Texas Transportation Institute
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Implementation Office
• Subject/TRT Terms:
  • Soil compaction
  • Soil compaction test
  • Soil tests
  • Soil stabilization
  • Soil compaction--Texas--Testing
• Publication/ Report Number:
  FHWA/TX-11/5-5135-01-1 ; Project 5-5135-01
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Edition:
  Technical report; Sept. 2008-Aug. 2010.
• Corporate Publisher:
  Texas Transportation Institute
• Abstract:
  Test method Tex-113-E prepares laboratory aggregate base test specimens with an impact hammer ; compactor. These specimens are used for compaction characteristics and design tests. Although the ; historical Tex-113-E required a certain amount of compaction energy, no method to validate attainment of ; that energy existed until Texas Department of Transportation (TxDOT) Project 0-5135 developed the Soil ; Compactor Analyzer (SCA). The SCA measures the kinetic energy applied by each drop of the impact ; hammer. In this project, the SCA system was modified to control the compactor, where the SCA starts the ; machine and then turns off the compactor when the prescribed amount of energy is attained. This project ; then evaluated how changing the machine operational parameters, such as hammer weight, drop height, and ; number of blows per lift, impacted test results. In this evaluation, the SCA was used in all cases to control ; the compactor, so the prescribed amount of total energy was always applied regardless of machine ; operational parameters. The results showed that while using the current TxDOT-approved SCA to control ; total energy per lift between 740 and 765 ft-lbf, the number of blows per lift may vary between 45 and 60 ; with no impact on test results. Finally, this project conducted an interlaboratory study to develop precision ; statistics of Tex-113-E compaction. This study showed that the SCA enables excellent precision of total ; compaction energy. Total compaction energy should be repeatable and reproducible within about 27 ft-lbf, ; or approximately 1 percent of the specification value. Compacted dry density should be repeatable within ; about 2.5 pounds per cubic foot (pcf) and reproducible within about 3.3 pcf.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/24259/dot_24259_DS1.pdf
• File Type:
  [PDF - 8.82 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:498ec1c5a681f8b66177fe503a05a98f30290005d6b658e0a5c38f9de8435f794bbd7046d3e7f8ea47c474cf517c52b7123fb4bda2538207080ff7af8f9919bd