TY - JOUR
T1 - Effect of microbes addition on the properties and surface morphology of fly ash-based geopolymer paste
AU - Wulandari, Kiki Dwi
AU - Ekaputri, Januarti Jaya
AU - Triwulan,
AU - Kurniawan, Setyo Budi
AU - Primaningtyas, Widya Emilia
AU - Abdullah, Siti Rozaimah Sheikh
AU - Ismail, Nur ‘Izzati
AU - Imron, Muhammad Fauzul
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/1
Y1 - 2021/1
N2 - This present study analyzed the effect of Rhizopus oligosporus and Sporosarcina pasteurii addition on the properties and surface morphology of fly ash-based geopolymer paste mixtures as a green sustainable material. The addition of bottom ash and a foaming agent were also conducted to improve the paste quality. Compressive strength, porosity, X-Ray Diffractometry (XRD) and Scanning Electron Microscopy (SEM) tests were performed sequentially. The addition of microbes can improve the compressive strength of specimens by up to 43.75%. All microbe-added specimens exhibited a higher amount of closed porosity compared to the non-microbe-added specimens which also responsible to the higher compressive strength. The addition of foaming agent and bottom ash to the mixtures showed a negative effect to the inoculated microbes. SEM analysis showed the initial result of the potential of R. oligosporus and S. pasteurii as a self-healing agent for fly ash-based geopolymer pastes.
AB - This present study analyzed the effect of Rhizopus oligosporus and Sporosarcina pasteurii addition on the properties and surface morphology of fly ash-based geopolymer paste mixtures as a green sustainable material. The addition of bottom ash and a foaming agent were also conducted to improve the paste quality. Compressive strength, porosity, X-Ray Diffractometry (XRD) and Scanning Electron Microscopy (SEM) tests were performed sequentially. The addition of microbes can improve the compressive strength of specimens by up to 43.75%. All microbe-added specimens exhibited a higher amount of closed porosity compared to the non-microbe-added specimens which also responsible to the higher compressive strength. The addition of foaming agent and bottom ash to the mixtures showed a negative effect to the inoculated microbes. SEM analysis showed the initial result of the potential of R. oligosporus and S. pasteurii as a self-healing agent for fly ash-based geopolymer pastes.
KW - Mechanical properties
KW - Physical properties
KW - Rhizopus oligosporus
KW - Self-healing
KW - Sporosarcina pasteurii
UR - http://www.scopus.com/inward/record.url?scp=85089188316&partnerID=8YFLogxK
U2 - 10.1016/j.jobe.2020.101596
DO - 10.1016/j.jobe.2020.101596
M3 - Article
AN - SCOPUS:85089188316
SN - 2352-7102
VL - 33
JO - Journal of Building Engineering
JF - Journal of Building Engineering
M1 - 101596
ER -