Author: Robert T. MartinPublisher:
ISBN:
Category :
Languages : en
Pages : 19
Book Description
Development of Triaxial Testing System for Determination of Material Properties
Author: Robert T. MartinThe Development of a Triaxial Testing System and the Determination of a Poroelastic Properties of Porous Cement
Author: James Aaron HeintzDevelopment of a Dynamic High-pressure Triaxial Test Device
Author: John Q. EhrgottPublisher:
ISBN:
Category : Materials
Languages : en
Pages : 82
Book Description
Resilient Modulus Testing for Pavement Components
Author: Mary Stroup-GardinerPublisher: ASTM International
ISBN: 0803134614
Category : Pavements
Languages : en
Pages : 274
Book Description
"Resilient modulus indicates the stiffness of a soil under controlled confinement conditions and repeated loading. The test is intended to simulate the stress conditions that occur in the base and subgrade of a pavement system. Resilient modulus has been adopted by the U.S. federal highway administration as the primary performance parameter for pavement design. We thank those who prepared these papers, the reviewers who provided anonymous peer reviews, and those who participated in the symposium. We hope this STP encourages more work to improve the testing standard and the value of the Resilient Modulus test."
Rock landslide risk assessment, stability analysis and monitoring for the development of early warning systems and reinforcement measures
Author: Mowen XiePublisher: Frontiers Media SA
ISBN: 2832511945
Category : Science
Languages : en
Pages : 287
Book Description
U.S. Government Research & Development Reports
Author: Highway Research & Development Studies
Author: United States. Bureau of Public Roads. Office of Research and DevelopmentPublisher:
ISBN:
Category :
Languages : en
Pages : 178
Book Description
Development of an Internal Camera-based Volume Determination System for Triaxial Testing
Author: Sean Elliott SalazarPublisher:
ISBN:
Category : Soil mechanics
Languages : en
Pages : 320
Book Description
Accurate measurement of axial, radial, and volumetric strain parameters are critical to the understanding of phase relationships and the constitutive behavior for saturated and unsaturated soils. The use of photographic monitoring techniques for laboratory-based measurement of these parameters have become common. A novel technique that utilized camera instrumentation located within the triaxial testing cell was developed and validated. By placing the instrumentation inside of the cell, instead of the instrumentation being located outside of the cell, the technique eliminated cumbersome corrections required to account for optical distortions due to 1) the refraction of light at the confining fluid-cell wall-atmosphere interfaces, 2) the curvature of the cylindrical cell wall, and 3) the deformation of the cell wall induced by changes in cell pressure. Digital images of various soil and analog (brass, acrylic) specimens were captured within the triaxial apparatus during testing. The images were processed using the principles of close-range photogrammetry to construct three-dimensional models of the specimens. The models were analysed to determine surface deformation and total volume of the specimens. Additionally, the models obtained from triaxial tests performed on the soil samples were compared to quantify deformation and volume of the sample as a function of axial strain. Sensitivity studies and evaluation of measurement accuracy for the internal, close-range photogrammetry approach are documented herein. Specimen volume, as obtained using the approach, was compared with volume obtained from four other techniques, including: DSLR camera photogrammetry, 3D structured light scanning, manual measurements (caliper and pi tape), and water displacement. A relative error of 0.13 percent was assessed for the internal photogrammetry technique. The viability of determining total and local strains, volumetric changes, and total volume at any stage of triaxial testing was demonstrated through undrained triaxial compression and extension tests. Results from all tests are presented herein. The use of the internal, close-range photogrammetry technique is recommended.
Calculation of Stress and Strain from Triaxial Test Data on Undrained Soil Specimens
Author: John Q. EhrgottPublisher:
ISBN:
Category : Shear strength of soils
Languages : en
Pages : 88
Book Description
The formulation of constitutive relations for use in computerized analyses of free-field ground shock phenomena is based primarily on laboratory-determined material properties. These properties, as described by stress-strain relations, are not directly determined in the laboratory, but are derived through interpretation of load and deformation data measured by the experimenter. Throughout this paper, one laboratory test, the triaxial shear test, is used to illustrate the extent of interpretation required on raw data and the influence of this interpretation on recommended constitutive properties. Various techniques that have been developed to obtain stress-strain data from the triaxial test are reviewed along with current advances in measurement systems. Typical raw data are presented and calculations of axial, lateral, and volumetric strains are made based on a variety of empirical and theoretical approaches. (Author).
Pavement and Asset Management
Author: Maurizio CrispinoPublisher: CRC Press
ISBN: 0429559720
Category : Technology & Engineering
Languages : en
Pages : 847
Book Description
Pavement and Asset Management contains contributions from the World Conference on Pavement and Asset Management (WCPAM 2017, Baveno, Italy, 12-16 June 2017). For the first time, the European Pavement and Asset Management Conference (EPAM) and the International Conference on Managing Pavement Assets (ICMPA) were joining forces for a global event that aimed not only at academics and researchers, but also at practitioners, engineers and technicians dealing with everyday tasks and responsibilities related to transport infrastructures pavement and asset management. Pavement and Asset Management covers a wide range of topics, from emerging research to engineering practice, and is grouped under the following themes: - Data quality and monitoring - Economics, political and environmental management, strategies - Deterioration models - Key performance indicators - PMS-case studies - Design and materials - M&R treatments - LCA & LCCA - Risk and safety - Bridge and tunnel management - Smart infrastructure and IT Pavement and Asset Management will be valuable to academics and professionals interested and/or involved in issues related to transport infrastructures pavement and asset management.