Effect of the Mortar Volume Ratio on the Mechanical Behavior of Class CI Fly Ash-Based Geopolymer Concrete

Cornelis, Remigildus; Priyosulityo, Henricus; Satyarno, Iman; Rochmadi, .; Rustendi, Iwan

doi:10.28991/cej-2022-08-09-012

Cited by 6 publications

(1 citation statement)

References 40 publications

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“…This C-S-H gel effectively fills the gaps between particles in the pastes, enhancing overall density and compactness while reducing porosity [17]. This densification leads to improved inter-particle contact, thereby increasing compressive strength [18]. Moreover, the presence of high CaO content in these samples suggests that the geopolymer cement produced is resistant to acid erosion, as it helps prevent structural disintegration upon carbonation [19].…”

Section: Elemental Composition Of the Clay Mineral By Xrfmentioning

confidence: 99%

Exploring Tanzanian Clay Minerals as Promising Candidates for Geopolymer Cement: A Sustainable Approach to Climate-Friendly Cement

Kitalika,

Mabeyo,

Mushi

et al. 2024

Preprint

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The quest for sustainable construction materials has sparked interest in geopolymers as eco-friendly alternatives to traditional Portland cement. In response to this endeavour, this study explored Tanzanian clay minerals collected from different regions to assess their potential as candidate materials for geopolymer cement. The XRF results revealed varying elemental compositions that are crucial for geopolymer production. Essential components like SiO2 and Al2O3 were found, with some regions showing balanced ratios suitable for geopolymer cement. Minor Fe2O3 content was also detected, which could enhance material strength by forming iron silicate binders. Limited CaO content was noted, which can be beneficial in influencing geopolymer properties. However, high CaO levels in a few regions of the Eastern zone may be less suitable for geopolymer cement production. Most samples showed minimal Loss of Ignition (LOI), indicating their potential to enhance the workability of geopolymers. The study identified specific regions with clays suitable for various high-technology geopolymer resins, low-CO2 geopolymer cement, and specialized applications, though beneficiation might sometimes be required. The XRD results of clay samples revealed varying mineral compositions, with quartz being the dominant mineral in several samples, indicating high silica content. These mineralogical findings align with the XRF results, reinforcing the presence of essential elements for geopolymer cement development. The SEM-EDS results further verified the elemental composition of select samples. Additionally, TGA results provided insights into the thermal stability of the clay samples, confirming their suitability for geopolymer cement production. These results demonstrated that Tanzanian clay minerals are well-suited for producing eco-friendly cement. By leveraging these readily available local clay resources and unlocking their potential for sustainable construction materials, this research significantly advances the worldwide endeavour to mitigate the environmental footprint of the construction sector while advocating for eco-conscious alternatives to conventional Portland cement.

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Section: Elemental Composition Of the Clay Mineral By Xrfmentioning

confidence: 99%

Exploring Tanzanian Clay Minerals as Promising Candidates for Geopolymer Cement: A Sustainable Approach to Climate-Friendly Cement

Kitalika,

Mabeyo,

Mushi

et al. 2024

Preprint

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Value-added utilization of granite industry by-product in development of geopolymer paver blocks for medium traffic drive ways

Pesaramelli,

Nayaka,

Siva Kumar

2023

Innov. Infrastruct. Solut.

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Design and characterization of iron–calcium–aluminium–silicate–hydrate as low-temperature binder

Tchio,

Yerima,

Kaze

et al. 2024

Innov. Infrastruct. Solut.

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This work aims to synthesize new cementitious materials (binders) using marble powder, rice husk ash, activated laterite and NaOH solution by applying low energy process. The binder was used to stabilize solid precursors (laterite and pozzolan). To achieve this objective, calcium–silicate–hydrate (CSH) was first synthesized at different temperatures (26, 50, 80 and 100 °C). The best physical–mechanical properties were chosen to produce iron–calcium–aluminium–silicate–hydrate [Fe–C(A)SH] at different concentrations of sodium hydroxide solution: 4, 5, 6 M. Finally, the formulated binder at 6 M of NaOH solution was used to stabilize laterite and pozzolans at the following proportions 20%, 30%, 40% and 50%. The samples were characterized after 28 days of curing at room temperature. FT-infrared spectroscopy, X-ray diffraction, and environmental scanning electron microscope ESEM-EDS permitted to confirm the formation of CSH, and Fe–C(A)SH. The mechanical test used to evaluate the performance showed that the incorporation of 10% iron-rich laterite into CSH increased the strength up to 42.93 MPa and the addition of Fe–C(A)SH in the laterite/pozzolans increased the compressive strength of the final product (15.34 and 15.8 MPa for laterite and pozzolan, respectively). The highest concentration (6 M) increases the alkalinity and reduces the efficiency of silicate polymerization affecting the final structural compound. From the results, low-energy Fe–C(A)SH-based cement and stabilized compounds appeared promising for the development of sustainable infrastructures.

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Effect of the Mortar Volume Ratio on the Mechanical Behavior of Class CI Fly Ash-Based Geopolymer Concrete

Cited by 6 publications

References 40 publications

Exploring Tanzanian Clay Minerals as Promising Candidates for Geopolymer Cement: A Sustainable Approach to Climate-Friendly Cement

Exploring Tanzanian Clay Minerals as Promising Candidates for Geopolymer Cement: A Sustainable Approach to Climate-Friendly Cement

Value-added utilization of granite industry by-product in development of geopolymer paver blocks for medium traffic drive ways

Design and characterization of iron–calcium–aluminium–silicate–hydrate as low-temperature binder

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