TY - JOUR
AU1 - Longos, Alberto
AU2 - Tigue, April  Anne
AU3 - Dollente, Ithan  Jessemar
AU4 - Malenab, Roy  Alvin
AU5 - Bernardo-Arugay, Ivyleen
AU6 - Hinode, Hirofumi
AU7 - Kurniawan, Winarto
AU8 - Promentilla, Michael  Angelo
AB - Geopolymer cement has been popularly studied nowadays compared to ordinary Portland cement because it demonstrated superior environmental advantages due to its lower carbon emissions and waste material utilization. This paper focuses on the formulation of geopolymer cement from nickel–laterite mine waste (NMW) and coal fly ash (CFA) as geopolymer precursors, and sodium hydroxide (SH), and sodium silicate (SS) as alkali activators. Different mix formulations of raw materials are prepared to produce a geopolymer based on an I-optimal design and obtained different compressive strengths. A mixed formulation of 50% NMW and 50% CFA, SH-to-SS ratio of 0.5, and an activator-to-precursor ratio of 0.429 yielded the highest 28 d unconfined compressive strength (UCS) of 22.10 ± 5.40 MPa. Furthermore, using an optimized formulation of 50.12% NMW, SH-to-SS ratio of 0.516, and an activator-to-precursor ratio of 0.428, a UCS value of 36.30 ± 3.60 MPa was obtained. The result implies that the synthesized geopolymer material can be potentially used for concrete structures and pavers, pedestrian pavers, light traffic pavers, and plain concrete.
TI - Optimization of the Mix Formulation of Geopolymer Using Nickel-Laterite Mine Waste and Coal Fly Ash
JF - Minerals
DO - 10.3390/min10121144
DA - 2020-12-21
UR - https://www.deepdyve.com/lp/multidisciplinary-digital-publishing-institute/optimization-of-the-mix-formulation-of-geopolymer-using-nickel-1DwaP0C4aB
SP - 1144
VL - 10
IS - 12
DP - DeepDyve
ER -