A preliminary investigation into the sequestration of biochar in lime-GGBS treated acid sulphate soils

Pasan Madhuharshana Weerasekara, Md Shahidul Islam, Asadul Haque

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review


Lime activated GGBS has been investigated to improve the Acid Sulphate Soils (ASS) found along the coastline of Australia. Biochar is an environmentally friendly carbon negative material which has been incorporated for soil stabilisation works. ASS was treated with different proportions of biochar, lime and GGBS. Treated ASS was cured for up to 6 months in a humid chamber and tested for the unconfined compressive strength and mineralogical developments. Results of this study show that biochar can be sequestered in the stabilisation of ASS to achieve a desired strength and reduction of carbon intensive cementing materials (lime, cement). It has been found that the UCS of treated ASS increases up to 3 months curing for the additives proportions investigated.
Original languageEnglish
Title of host publicationANZ 2015
Subtitle of host publication12th Australia New Zealand conference on geomechanics: proceedings
EditorsLucy McChesney
Place of PublicationLondon UK
PublisherInternational Society for Soil Mechanics and Geotechnical Engineering (ISSMGE)
Pages73 - 79
Number of pages7
Publication statusPublished - 2015
EventAustralia New Zealand Geomechanics Conference 2015 - Wellington, New Zealand
Duration: 22 Feb 201525 Feb 2015
Conference number: 12th


ConferenceAustralia New Zealand Geomechanics Conference 2015
Abbreviated titleANZ 2015
Country/TerritoryNew Zealand
Other12th Australia New Zealand Conference on Geomechanics (ANZ 2015)
Start date: 2015-02-22
End date: 2015-02-25
City: Wellington
Country: New Zealand
Organizer: New Zealand Geotechnical Society and the Australian Geomechanics Society
Website: http://www.anz2015.com/


  • Acid sulphate soil
  • Soil improvement
  • Lime-GGBS-biochar
  • Unconfined compressive strength
  • Mineralogy

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