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Full-Text Articles in Engineering
Beta Testing Implementation Of The Purdue Time Domain Reflectometry (Tdr) Method For Soil Water Content And Density Measurement, Vincent P. Drnevich, Xiong Yu, Janet Elaine Lovell
Beta Testing Implementation Of The Purdue Time Domain Reflectometry (Tdr) Method For Soil Water Content And Density Measurement, Vincent P. Drnevich, Xiong Yu, Janet Elaine Lovell
JTRP Technical Reports
The Purdue TDR method is a new technology for simultaneously measuring soil water content and dry density insitu. An ASTM standard for using TDR to measure soil water content and dry density based on Purdue TDR method was approved during the time span of this project and is designated ASTM D6780. The primary objective of this study was to take the Purdue TDR Method to the point where it is widely field tested by users on a broad spectrum of soils around the country. This goal was achieved by involving researchers at other universities and practitioners in federal and state …
Development Of Low Cost Retaining Walls For Indiana Highways, Philippe L. Bourdeau, Patrick J. Fox, David Joseph Runser, Jin-Pyo Lee
Development Of Low Cost Retaining Walls For Indiana Highways, Philippe L. Bourdeau, Patrick J. Fox, David Joseph Runser, Jin-Pyo Lee
JTRP Technical Reports
Low-cost alternatives to traditional modular facing reinforced soil retaining walls were reviewed, on the basis of published data and information. Technological information, design methods and observed performance of segmental facing reinforced soil walls were used for this review. Guidelines are proposed for selection, design and construction of such retaining walls, within a limited range of conditions, in Indiana highway projects.
Real-Time Determination Of Soil Type, Water Content, And Density Using Electromagnetics, Vincent P. Drnevich, Chih-Ping Lin, Quanghee Yi, Janet Elaine Lovell
Real-Time Determination Of Soil Type, Water Content, And Density Using Electromagnetics, Vincent P. Drnevich, Chih-Ping Lin, Quanghee Yi, Janet Elaine Lovell
JTRP Technical Reports
The primary objective of this study was to explore the potential use of electromagnetic characteristics of soils using the Time Domain Reflectometry (TDR) technique to identify physical properties of soils. Three fundamental studies in this exploration are the frequencydependent electromagnetic properties of soils, the wave propagation in a TDR system, and the inverse analyses of TDR waveforms. The three-phase model for soils was extended to a four-phase model so as to account for the interface effect and hence the soil fineness. The physical parameters of the four-phase model are related to the frequency-dependent dielectric permitivity of the soil through a …
Embankment Widening Design Guidelines And Construction Procedures, Richard J. Deschamps, Christopher S. Hynes, Philippe L. Bourdeau
Embankment Widening Design Guidelines And Construction Procedures, Richard J. Deschamps, Christopher S. Hynes, Philippe L. Bourdeau
JTRP Technical Reports
In recent years failures have occurred in Indiana highway embankments where the embankments were widened and steepened in order to facilitate construction of longer, safer acceleration and deceleration lanes and to increase the traffic capacity and efficiency of existing thoroughfares. The objectives of this study were to investigate the cause of failure and to make recommendations for modifying the existing INDOT Standard Specifications and construction guidelines in an attempt to avoid similar failures in the future. A literature review and survey of state and federal transportation agencies was performed to collect current, available design guidelines and construction procedures for sideslope …
Automation And Standardization Of Measuring Moisture Content And Density Of Soil Using The Technique Of Time Domain Reflectometry, Wei Feng, Chih-Ping Lin, Richard J. Deschamps, Vincent P. Drnevich
Automation And Standardization Of Measuring Moisture Content And Density Of Soil Using The Technique Of Time Domain Reflectometry, Wei Feng, Chih-Ping Lin, Richard J. Deschamps, Vincent P. Drnevich
JTRP Technical Reports
The methodology developed by Siddiqui and Drnevich (1995) for measuring soil water content and density using Time Domain Reflectometry (TDR) was extended for routine use in the quality control testing of compacted soils. The objectives of the study were to develop computer software to automate data interpretation and data reduction, develop prototype equipment for field use, compare the results of the TDR method with the sand cone and nuclear density methods on actual construction sites and develop draft specifications for ASTM and AASHTO. New prototype equipment was developed for compaction quality control testing. Waveform interpretation and data reduction were automated …
Use Of Time Domain Reflectometry For Determination Of Water Content An Density Of Soil, Shafiqul I. Siddiqui, Vincent P. Drnevich
Use Of Time Domain Reflectometry For Determination Of Water Content An Density Of Soil, Shafiqul I. Siddiqui, Vincent P. Drnevich
JTRP Technical Reports
A new method is developed for measuring in-place density and moisture content of soil using the technique of Time Domain Reflectometry (TDR). The method is applicable for construction control of earthworks. The method is extended for measuring moisture content of soil in the laboratory and in the field for various other geotechnical purposes. Laboratory uses include measuring moisture content of soil in compaction molds; field uses include measuring moisture content of soil in Shelby tubes and soil retrieved during drilling and sampling operations. In the course of achieving these goals, this study develops the principles of TDR probe design, test …
Engineering Soils Map Of Blackford County, Indiana, Andrew Garrigus
Engineering Soils Map Of Blackford County, Indiana, Andrew Garrigus
JTRP Technical Reports
This report entitled "Engineering Soils Map of Blackford County, Indiana," completes a portion of the long-term project concerned with the development of county engineering soils maps of the 92 counties in the state of Indiana. This is the 86th report of the series. The report was prepared by Andrew Garrigus, Research Assistant, Joint Highway Research Project, under my direction. The soils mapping of Blackford County was done primarily by the analysis of landforms and associated parent materials as portrayed on stereoscopic aerial photographs. Extensive additional information on the soils was obtained from the soil survey and publications of the Soil …