You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    Volume 41, Issue 4 (July 2018)

    The Microstructure and Water Distribution of Partially Saturated Hard Clay

    (Received 18 December 2016; accepted 27 October 2017)

    Published Online: 2018

    CODEN: GTJODJ

      Format Pages Price  
    PDF (601.55 KB) 6 $25   ADD TO CART

    Cite this document

    X Add email address send
    X
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word



    Abstract

    This article presents an experimental investigation of the microstructure and water distribution of partially saturated natural hard clay. A series of natural hard clay specimens were desaturated using a controlled-suction technique and then examined using nuclear magnetic resonance relaxometry (NMR) and mercury intrusion porosimetry (MIP). NMR allows one to investigate the microstructure and the water distribution of the material, while MIP can provide information about the free space distribution of the material. The results of NMR are consistent with the MIP measurements and show that the pore size of the hard clay has a similar unimodal distribution. The relaxation time distribution curves are closely related to the water content of the specimens. The dehydration mechanism of the hard clay is revealed by both NMR and MIP: the water progressively evaporates from large pores to small pores. The peak of the T2 relaxation time distribution decreases with a decrease in water content, and the peak of the free pore size distribution increases during hydration. The results of NMR and MIP are consistent and reveal the same dehydration mechanisms. The limits of NMR and MIP for partially saturated materials will be discussed in this text.

    Author Information:

    Chen, Liufeng
    School of Civil Engineering, Wuhan University, Wuhan

    College of Civil Engineering, Suzhou University of Science and Technology, Suzhou

    Peng, Hua
    School of Civil Engineering, Wuhan University, Wuhan

    Yang, Diansen
    State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Science, Wuhan, Wuchang


    Stock #: GTJ20160336

    ISSN:0149-6115

    DOI: 10.1520/GTJ20160336

    Author
    Title The Microstructure and Water Distribution of Partially Saturated Hard Clay
    Symposium ,
    Committee D18