Predicting volumetric behavior of compacted clays during compression

Predicting volumetric behavior of compacted clays during compression Compacted clays are one of the most frequently used materials in the construction of geotechnical infrastructure. Clays, after compaction, typically stay in an unsaturated condition. Their volumetric behavior is the key information for the geotechnical design but is quite complicated to describe or predict due to the coupled hydro-mechanical interplay among the solid, water and air phases. This paper proposes a model for predicting the volumetric behavior of compacted unsaturated clays during compression (compression line), which consists of the pre-yielding elastic deformation (recompression line) as well as the post-yielding elastoplastic deformation (normal compression line). The model is convenient to use as it only requires limited soil information to calibrate, including the conventional saturated compression line and one unsaturated compression line. Experimental investigation was conducted to determine the volumetric behavior of a compacted expansive clay collected from Nanyang, China during constant water content compression. The performance of the proposed model is reasonably validated against the testing data of the expansive clay, as well as literature data of several clays obtained from constant water content or constant suction compression. It is demonstrated that the model predictions are capable of capturing the non-linear characteristics of the unsaturated compression lines and allow smooth transitions (i) from elastic deformation to elastoplastic deformation at yielding (gradual yielding) and (ii) from unsaturated condition to saturated condition at high stress level (pressurized saturation). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Clay Science Elsevier

Predicting volumetric behavior of compacted clays during compression

Loading next page...
 
/lp/elsevier/predicting-volumetric-behavior-of-compacted-clays-during-compression-0M4HWFAaTX
Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier B.V.
ISSN
0169-1317
eISSN
1872-9053
D.O.I.
10.1016/j.clay.2018.01.036
Publisher site
See Article on Publisher Site

Abstract

Compacted clays are one of the most frequently used materials in the construction of geotechnical infrastructure. Clays, after compaction, typically stay in an unsaturated condition. Their volumetric behavior is the key information for the geotechnical design but is quite complicated to describe or predict due to the coupled hydro-mechanical interplay among the solid, water and air phases. This paper proposes a model for predicting the volumetric behavior of compacted unsaturated clays during compression (compression line), which consists of the pre-yielding elastic deformation (recompression line) as well as the post-yielding elastoplastic deformation (normal compression line). The model is convenient to use as it only requires limited soil information to calibrate, including the conventional saturated compression line and one unsaturated compression line. Experimental investigation was conducted to determine the volumetric behavior of a compacted expansive clay collected from Nanyang, China during constant water content compression. The performance of the proposed model is reasonably validated against the testing data of the expansive clay, as well as literature data of several clays obtained from constant water content or constant suction compression. It is demonstrated that the model predictions are capable of capturing the non-linear characteristics of the unsaturated compression lines and allow smooth transitions (i) from elastic deformation to elastoplastic deformation at yielding (gradual yielding) and (ii) from unsaturated condition to saturated condition at high stress level (pressurized saturation).

Journal

Applied Clay ScienceElsevier

Published: May 1, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off