Setting time of geopolymer binder based on Umeanyar slate stone powder

Astariani, Ni Kadek; Salain, I Made Alit Karyawan; Sutarja, I N; Widiarsa, Ida Bagus Rai

doi:10.1088/1755-1315/871/1/012002

Cited by 3 publications

(2 citation statements)

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“…The presence of iron oxide also improves the overall properties of the final geopolymer. As reported in the previous literature about the high percentage of silica and alumina of slate stones [30][31][32][33], the SiO 2 /Al 2 O 3 relation accounts for 2.28 wt.%. The SiO 2 /Al 2 O 3 ratio has a relevant role in the bulk density and compressive strength of the geopolymer, and their variations can decrease or increase the compressive strength value.…”

Section: X-ray Fluorescencementioning

confidence: 66%

“…Therefore, the motivation for the present research paper was to develop and study the properties of a new mining waste geopolymer-based slate stone as a source of aluminosilicates for potential construction applications. Previous scientific studies have demonstrated, by mineralogical and chemical analysis, that slate stone from Brazil [30], Angola [31], Indonesia [32], and Spain [33], among others, has a high percentage of alumina and silica in its composition. Therefore, slate stone cutting sludge (hereinafter referred to as SSCS) from metamorphic rocks becomes a potential source of aluminosilicates for geopolymers.…”

Section: Introductionmentioning

confidence: 99%

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Towards a Sustainable Mining: Reuse of Slate Stone Cutting Sludges for New Geopolymer Binders

Carrillo Beltrán,

Picazo Camilo,

Perea Toledo

et al. 2024

Sustainability

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In recent years, the mining industry of slate stone in Spain, from Castille and Leon, has grown significantly due to construction and building sector demands. The continuous accumulation of cutting sludges in ponds from mining and processing operations brings associated environmental problems if the cutting sludges are not properly treated. A potential environmental mitigation measure is the valorization of cutting sludges for the development of new binder materials through geopolymerization. Therefore, this research focused its attention on studying the feasibility of slate stone cutting sludges as a source of aluminosilicates for geopolymer conformation. For this experiment, the mining raw material was analyzed through a typical characterization test campaign in order to validate its feasibility as a source of aluminosilicates for geopolymerization. Subsequently, geopolymers were prepared with slate stone cutting sludges and a 12 M concentration using different Na2SiO3/NaOH ratios (5, 2.5, 1.6, 1.25, and 1). Geopolymer samples were tested, and their physical and mechanical characteristics were evaluated. The test results show that an alkali activator with a 2.5 ratio led to better mechanical and physical properties, with a 7-day compressive strength value of 27.23 MPa. Therefore, this research aims to demonstrate that slate stone cutting sludge could constitute a sustainable binder material for construction purposes.

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Section: X-ray Fluorescencementioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%