By John T. Germaine
A finished consultant to the main necessary geotechnical laboratory measurements
Cost potent, top of the range checking out of geo-materials is feasible when you comprehend the real elements and paintings with nature correctly. Geotechnical Laboratory Measurements for Engineers publications geotechnical engineers and scholars in carrying out effective checking out with no sacrificing the standard of results.
Useful as either a lab handbook for college kids and as a reference for the working towards geotechnical engineer, the publication covers thirty of the commonest soil exams, referencing the ASTM commonplace approaches whereas supporting readers comprehend what the try is studying and the way to interpret the results.
- Explanations of either the underlying thought of the exams and the normal checking out procedures
- The so much commonly-taught laboratory trying out tools, plus extra complex tests
- Unique discussions of digital transducers and machine managed checks no longer quite often lined in comparable texts
- A support site at www.wiley.com/college/germaine with clean info sheets you should use in recording the result of your assessments in addition to Microsoft Excel® spreadsheets containing uncooked information units helping the experiments
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Extra info for Geotechnical Laboratory Measurements for Engineers
Typical values of specific gravity are provided for a variety of geo-materials later in this chapter. The table demonstrates the relatively small range of values for several common soil materials. This small range demands a high precision in the test method in order to make it worthwhile to perform the test for a specific application. Two methods are used to experimentally determine specific gravity. One is the liquid submersion technique and the other is the gas pycnometer technique. The gas pycnometer test method is designated ASTM D5550 Specific Gravity of Soil Solids by Gas Pycnometer.
Take precautions to preserve the water content while preparing the specimen. SPECIMEN P R E PA R AT I O N For this laboratory experiment, measurements will be made on trimmed specimens of fine-grained soil and laboratory-prepared coarse-grained specimens to determine the water content, total mass density, dry mass density, void ratio, and degree of saturation. PROCEDURE Phase Relationships 35 The water content measurement will be performed in general accordance with ASTM Standard Test Method D2216, while the determinations of mass density and the void ratio will be performed using basic laboratory physical measurements.
Com/college/germaine, for data sheets, spreadsheets, and example data sets. Da Re, Gregory. 2000. “Physical Mechanisms Controlling the Pre-failure Stress-Strain Behavior of Frozen Sand,” PhD Thesis, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge. Young, Gretchen. 1986. “The Strength Deformation Properties of Smith Bay Arctic Silts,” MS Thesis, Department of Civil Engineering, Massachusetts Institute of Technology, Cambridge. 38 Geotechnical Laboratory Measurements for Engineers Chapter 3 Specific Gravity This chapter provides background and procedures to perform the specific gravity test using the water submersion method.