1-D compressibility behaviour of cement-lime stabilized soft clays

Dongxing Wang*, Leena Korkiala-Tanttu

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

This paper addresses the effect of chemical stabilisation on the one-dimensional compression behaviour of natural soft clay, based on incremental loading oedometer tests. The effect of cement-lime mixture with curing period from 1 to 28 days is evaluated for various dosages ranging from 1 to 13% by dry mass of clay. An important effect of cement-lime stabilisation is the development of cementation-induced yielding stress, associated with the initial void ratio, position and shape of compression curves as well as the ability of sustaining higher effective consolidation stress. The result provides the effect of cement-lime treatment on the compression index, coefficient of consolidation and hydraulic conductivity. The role played by cement-lime dosage is investigated in the evolution of compression index, creep coefficient and ratio of compression index to creep coefficient. The time-dependency of creep coefficient is studied on stabilised clays with various cement-lime dosages. The compression results are complemented by the stress-dependent analysis of creep coefficient and compression modulus, which provides insight into the influence of effective stress levels on treated clays with different dosages of cement-lime. This study provides a reference to analyse the effect of cement-lime stabilisation on natural soft clays in the practice of soft ground improvement.

Original languageEnglish
Pages (from-to)1013-1031
Number of pages19
JournalEuropean Journal of Environmental and Civil Engineering
Volume24
Issue number7
Early online date26 Feb 2018
DOIs
Publication statusPublished - 6 Jun 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • cement-lime treatment
  • consolidation
  • creep
  • Soft sensitive clay
  • yielding

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