Effects of petroleum sludge ash in fly ash-based geopolymer mortar

Effects of petroleum sludge ash in fly ash-based geopolymer mortar

Compressive strength

Geopolymer mortar

Microstructural properties

Petroleum sludge ash

Precursor material

Due to its encapsulation capacity and low carbon emission, geopolymer mortar is recognized as a possible substitute for Portland cement. This paper reports an experimental procedure of producing geopolymer mortar using petroleum sludge ash (PSA) and fly ash. Replacement levels of PSA were 0 – 20% by the weight of fly ash, 8 – 16 molarity of NaOH, 1.5 – 2.5 ratio of Na2SiO3 to NaOH were used. The 28 days compressive strength of geopolymer mortar made with 10% PSA was found to be the highest (31 MPa). Using variance analysis, the influence of NaOH concentration, the ratio of Na2SiO3 to NaOH, and PSA on the behavior of geopolymer mortars was acquired. The defined models were found to be significant for p-values < 5%. The concentrations of the targeted heavy metals were found to be within the permissible level of USEPA.

Construction and Building Materials

2021-02-22

Usman Kankia, Mubarak

Baloo, Lavania

Mohammed, Bashar S.

Hassan, Suhaimi B.

Haruna, Sani

Danlami, Nasiru

Affiana Ishak, Effa

Nurliyana Samahani, Wan

Journal Article

VYFJC2IZ

0950-0618

10.1016/j.conbuildmat.2020.121939