Fired-siltstone based geopolymers for CO2 sequestration wells: a study on the effect of curing temperature

Ashani Ranathunga, Ranjith Pathegama Gamage, Xiaojun Liu

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther


Wellbore integrity during Carbon Dioxide (CO 2 ) storage in deep aquifers is a major problem as the currently used well cement will lose its integrity at higher temperatures and eventually leads to CO 2 leakage into the atmosphere. Researchers have conducted several studies in order to find a proper well cement material and have tested several types of geopolymers mixing fly ash and different type of cements with an alkaline solution curing in different temperatures. This paper presents a study on geopolymer composites made from fired siltstone, slag as well as alkaline liquid which were cured at temperatures ranging from 23°C to 80°C. Five different types of geopolymer were prepared with ratios of fired siltstone (to 700 oC) and slag as 0:100, 20:80, 30:70, 40:60 and 50:50, separately. After preparing samples with various proportions under different temperatures, the mechanical properties of them were compared. The experimental results reveal that optimum curing temperature range is 50 to 70°C and addition of higher proportion of slag would help geopolymer gain better performance on mechanical strength compared to other geopolymer materials.

Original languageEnglish
Title of host publicationMERCon 2018 - 4th International Multidisciplinary Moratuwa Engineering Research Conference
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages6
ISBN (Print)9781538644171
Publication statusPublished - 27 Jul 2018
EventInternational Multidisciplinary Moratuwa Engineering Research Conference 2018 - Moratuwa, Sri Lanka
Duration: 30 May 20181 Jun 2018
Conference number: 4th

Publication series

NameMERCon 2018 - 4th International Multidisciplinary Moratuwa Engineering Research Conference


ConferenceInternational Multidisciplinary Moratuwa Engineering Research Conference 2018
Abbreviated titleMERCon 2018
CountrySri Lanka
Internet address


  • curing temperature
  • geopolymer
  • stiffness
  • strength
  • wellbore

Cite this