TESTING METHODOLOGY FOR RESILIENT MODULUS OF BASE MATERIALS
The main objective of this report is to describe a proposed resilient modulus testing procedure which has been developed for the Texas Department of Transportation. This procedure contains the main characteristics of the AASHTO T294-92 procedure with several exceptions. The loading sequence is modified to avoid subjecting the specimens to high deviatoric stresses at low confining pressures. The conditioning cycles are eliminated and replaced by grouting the specimen to the platens to minimize disturbance to the specimen during stage testing. The effects of end restraint on the measured deformations are minimized by using a gage length equal to the middle one-third of the specimen. To avoid well-known problems with mounting LVDTs on the specimen, non-contact probes are utilized to measure the deformations. To maximize the amount of information gained from testing, the lateral deformations are measured with non-contact probes to determine the Poisson's ratio. Based on tests on synthetic and base materials from different parts of Texas, the methodology proposed here seems to yield more accurate and repeatable results. In addition, compared to the AASHTO protocol, the preparation and setup of the specimen are more convenient and less time consuming.
- Research study title: Application of Resilient Modulus Tests to Texas Base Materials.
University of Texas, El PasoCenter for Geotechnical and Highway Materials Research
El Paso, TX United States 79968-0516
Austin, TX United States 78763-5051
Washington, DC United States 20590
- Nazarian, S
- Pezo, R
- Picornell, M
- Publication Date: 1996-7
- Features: Appendices; Figures; Photos; References; Tables;
- Pagination: 180 p.
- TRT Terms: Accuracy; Alternatives analysis; Base course (Pavements); Laboratory tests; Modulus of resilience; Productivity; Test procedures; Testing equipment
- Uncontrolled Terms: Repeatability; Time savings
- Old TRIS Terms: Aashto t294-92
- Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;
- Accession Number: 00728432
- Record Type: Publication
- Report/Paper Numbers: FHWA/TX-94/1336-1, Res Rept 1336-1, Res Proj 0-1336
- Contract Numbers: Study 0-1336
- Files: TRIS, ATRI, USDOT, STATEDOT
- Created Date: Nov 15 1996 12:00AM