The paper describes the automation and calibration of a hydraulic Rowe consolidation cell that tests 151-mm-diameter by 60-mm-high specimens. The associated measurement instrumentation for the cell and specimen preparation procedures are also described. The cell was used to perform a set of one-dimensional constant rate of strain (CRS) tests at two vertical strain rates, 0.1 and 1%/h. The nonlinear CRS theory of Wissa et al. (1971) is presented, including methods for interpreting test results at higher strain rates. The results from the Rowe cell tests conducted on resedimented Boston Blue Clay are compared to those from more conventional incremental loading (IL) oedometer tests (63.5-mm-diameter by 23-mm-high specimens). For both the 0.1%/h tests (in which negligible excess pore pressure was generated at the undrained specimen base) and the 1%/h tests, the compression curves compare well with the baseline IL oedometer test curves. Values of preconsolidation pressure, s´p, averaged 94.0 kPa in the Rowe tests and 94.5 kPa in the IL oedometer tests. The compression ratios, CR = ?ev/? log s´v, in the virgin compression range were slightly lower in the Rowe cell tests (average 0.156 versus an average CR = 0.173 in the IL oedometer tests), which may be due to different testing conditions (e.g., back pressure in the Rowe cell) or the larger Rowe cell specimen. The coefficient of consolidation and hydraulic conductivity values computed from the Rowe cell tests are essentially identical with regard to stress level to the IL oedometer tests. The automated Rowe cell data indicate that the device offers a reliable and potentially rapid method for determining consolidation parameters, including hydraulic conductivity.
White Paper & Video on FTIR multigas analysis
Gasmet Technologies has published a free White Paper and a video on the simultaneous measurement of multiple gases in a wide variety of applications using FTIR. Both the video and the White Paper can be found here at www.gasmet.com or by visiting the Quantitech stand 62/63 at AQE 2017. With the ability to measure almost any gas, FTIR technology is employed in an enormous variety of applications including Continuous Emissions Monitoring, Stack Testing, Process Control, Industrial Hygiene, Engine Emissions,...
Use and application of Piezocone Penetration testing in Presumpscot Formation
Abstract: This paper examines the advantages and limitations of CPTu and SCPTu as an exploration method for geotechnical engineering of Presumpscot Formation. Discussion will include typical results of CPTu and SCPTu data for Presumpscot Formation, application and use for settlement prediction, bearing capacity analysis, slope stability evaluation, and seismic design considerations. Intent is to provide an overview of the Use and Application of Piezocone Penetration Testing for the Presumpscot Formation in...
Guide To Coolant In Oil Test Methods
Liquid cooled engines and rotating equipment use glycol based coolants because of their excellent heat transfer abilities. However, glycol based coolants are not desirable at all in lubrication oil itself – Coolant ingression to the lubricant is a particularly nasty contaminant for the variety of damage it can cause. Glycol coolants break down in the high temperature engine environment, leading to formation of glycolic acids. These acids attack nonferrous bearing surfaces and form metal salts. The acids...
New White Paper on FTIR multigas analysis
Quantitech has announced the publication of a free White Paper on the simultaneous measurement of multiple gases in a wide variety of applications using FTIR (Fourier Transform InfraRed) technology. With the ability to measure almost any gas, FTIR monitoring technology is employed in an enormous variety of applications including Continuous Emissions Monitoring, Stack Testing, Process Control, Industrial Hygiene, Engine Emissions, Semiconductor Manufacturing, Emergency / First Response, Greenhouse Gas Monitoring,...
Limit Risk and Enhance Balance Testing Ease with New White Paper
Upgrade balance testing security and compliance with WeightLink, an innovative tracking system that assigns unique, scannable identifiers to each weight. Learn how quick weight identification and automated data gathering enhance balance testing by downloading our free white paper as part of METTLER TOLEDO`s 2016 e-calendar. Adjustment and testing of lab balances can be an arduous task. Difficulties are found not only the execution of procedures, but also in the possibility of misreading numbers when choosing and...