Chapter
Aug 11, 2016
The Use of Sodium Pyrophosphate to Improve a Translucent Clay Simulate
Authors: Ryan D. Beemer, S.M.ASCE [email protected], Elliese Shaughnessy, S.M.ASCE, Kristen R. Ewert, S.M.ASCE, Nicholas Boardman, S.M.ASCE, Giovanna Biscontin, Ph.D., M.ASCE [email protected], Charles P. Aubeny, Ph.D., M.ASCE [email protected], and Francisco J. Grajales, S.M.ASCE [email protected]Author Affiliations
Publication: Geo-Chicago 2016
Abstract
In the ever expanding quest to understand the nature and behavior of soil, translucent and even transparent media have been developed to serve as soil simulates. These artificial soils can be used in experimental models to make visual measurement of phenomena such as geosystem kinematics, soil mass movement, soil particle motion, and pore fluid flow that would be nearly impossible to obtain in natural opaque soils without expensive equipment or boundary effects. One successful type of translucent clay simulate is lithium sodium magnesium silicate (LNM silicate); however, it’s low density/high void ratio results in higher than typical permeability, low undrained shear strength, and extremely long consolidation times. Until now, translucent soil simulates of only 4.5% by mass LNM silicate to total mass have been possible. This paper provides a method for creating mixtures of translucent LNM silicate gel/glass as high as 15% by mass with the additions of an emulsifier, sodium pyrophosphate decahydrate (SPP), which impedes gelation so additional silicate powder can be added. Further, digital image processing techniques are used to present a relationship between LNM silicate, SPP, and translucency and an analysis of the modified simulate’s permeability and consolidation properties, with comparisons to natural clays, is also included.
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© 2016 American Society of Civil Engineers.
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Published online: Aug 11, 2016
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ASCE Technical Topics:
- [Inorganic compounds]
- Chemical compounds
- Chemicals
- Chemistry
- Clays
- Consolidated soils
- Environmental engineering
- Geomechanics
- Geotechnical engineering
- Material mechanics
- Material properties
- Materials engineering
- Organic compounds
- Permeability (soil)
- Salts
- Silica
- Sodium
- Soil analysis
- Soil mechanics
- Soil properties
- Soils (by type)
Authors
Affiliations
Laureate Research Associate, Centre for Offshore Foundation Systems, Univ. of Western Australia, Perth, Australia. E-mail: [email protected]
Elliese Shaughnessy, S.M.ASCE
Undergraduate Student, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136.
Kristen R. Ewert, S.M.ASCE
Undergraduate Student, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136.
Nicholas Boardman, S.M.ASCE
Undergraduate Student, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136.
Lecturer, Dept. of Engineering, Univ. of Cambridge, Cambridge CB3 0EL, U.K. E-mail: [email protected]
P.E.
Professor, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136. E-mail: [email protected]
Graduate Assistant Lecturer, Zachry Dept. of Civil Engineering., Texas A&M Univ., College Station, TX 77843-3136; Lecturer, Faculty of Civil Engineering, Universidad Tecnologica de Panama, Panama City, Republic of Panama. E-mail: [email protected]; [email protected]
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