Improvement of poorly graded sandy soil by using copper mine tailing dam sediments-based geopolymer and silica fume

Lori, Iman Sheikhhosseini; Toufigh, Mohammad Mohsen; Toufigh, Vahid

doi:10.1016/j.conbuildmat.2021.122591

Cited by 20 publications

(8 citation statements)

References 51 publications

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“…Because SF replaces part of the MK content, high-activity SiO 2 with larger specific surface area can be obtained to participate in geopolymerization [31]. At the same time, the SF particles are evenly distributed in the geopolymer matrix, and the denser three-dimensional structure is obtained through alkali-activated, which is also proved by Sheikhhosseini et al [32].…”

Section: Compressive Strength Analysis Of Geopolymermentioning

confidence: 63%

Influences of Multi-Component Supplementary Cementitious Materials on the Performance of Metakaolin Based Geopolymer

Wu¹,

Luo²,

Ding³

et al. 2022

Journal of Renewable Materials

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In this study, the workability and reaction mechanism of metakaolin (MK) based geopolymer blended with rice husk ash (RHA) and silica fume (SF) was investigated. The prepared samples were subjected to tests including compressive strength and fluidity tests. X-ray diffraction (XRD) and Scanning electron microscope (SEM) were employed to explore the phase composition and microstructure of geopolymers. The molecular bonding information of geopolymer was provided by Fourier transform infrared spectroscopy (FTIR). Meanwhile, the porosity of geopolymer was obtained by Mercury intrusion porosimeter (MIP) analysis. The high-activity RHA obtained after calcination at 600°C was used as a supplementary cementitious material to prepare geopolymer. The properties of preventing morphology cracking and compressive strength are improved. The addition of RHA and SF changes the working performance of MK based geopolymer and provided a theoretical basis for future practical applications. Meanwhile, the high chemical activity of SF and RHA contributes to the healing of microcracks.

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Section: Compressive Strength Analysis Of Geopolymermentioning

confidence: 63%

Influences of Multi-Component Supplementary Cementitious Materials on the Performance of Metakaolin Based Geopolymer

Wu¹,

Luo²,

Ding³

et al. 2022

Journal of Renewable Materials

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“…The effects of mine tailings-based geopolymers improve mechanical properties efficiently without harming the environment, and potassium hydroxide concentration being the most influential parameter for compressive strength of samples [12], [13] indicated that lead and zinc mine tailings improve mechanical properties and that it is a good substitute for cement in concrete production. Lu et al [14] studied copper smelting slag and mentioned that it positively affects the mechanical properties of concrete.…”

Section: Discussionmentioning

confidence: 99%

“…Sheikhhosseini Lori et al [12] have pursued producing and utilizing new materials with acceptable mechanical properties and lower environmental costs. Geopolymers are new binders likely to outperform Portland cement due to their excellent strength and low greenhouse gas emissions.…”

Section: Effects Of Copper and Zinc On The Properties Of Concretementioning

confidence: 99%

Copper And Zinc Mining Tailings as A Partial Replacement for Cement to Increase the Compressive Strength of Concrete

Vallejos,

Rodríguez,

Reyes

et al. 2023

ijmst

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This study uses copper and zinc mining waste from mining activity as a partial substitute for cement in the concrete mix. This initiative seeks to strengthen the compressive strength of concrete. Copper and zinc waste can partially replace the cement content in concrete due to meeting the necessary physical and chemical requirements. In addition, these residues promote the formation of binders that improve the hydration of Portland cement. This approach improves the physical and mechanical properties of concrete and its durability. It also has economic and environmental advantages, as it uses copper and zinc waste from mining operations. Obtaining copper involves processing minerals from mines, which may contain copper oxides or sulfides. The rock is milled to obtain copper and zinc; these elements are separated using water, air, and other chemicals. The resulting by-products are stored in mining waste deposits that comply with current regulations. As for the research methodology, a deductive approach with applied orientation and a quantitative approach is followed. A retroactive data collection instrument is used to describe and explain the process. The optimal percentage of joint incorporation of copper and zinc residues from mining activity is around 10% and 5%, respectively. If you want to use only copper waste, you could reach up to 30%, while zinc waste can be incorporated in a maximum of 5%. In addition, it is observed that incorporating lead and zinc residues by 40% instead of cement increases compressive strength by 18%.

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“…Thus, geopolymer and other next-generation green construction materials can serve as suitable substitutes for OPC. Numerous studies in this field showed that geopolymers are environmentally friendly and sustainable since they can be manufactured from a variety of waste materials 30 – 34 . Geopolymer can be produced from any siliceous and aluminous substance that reacts in an alkaline environment to produce polymer chains and linked networks 35 – 37 .…”

Section: Introductionmentioning

confidence: 99%

Facile fabrication of next-generation sustainable brick and mortar through geopolymerization of construction debris

Rahimpour,

Amini,

Sharifi

et al. 2024

Sci Rep

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Waste from construction and demolition (also known as CDW) is one of the most harmful environmental issues. This study's primary goal is to produce new mortar and brick materials from recycled concrete powder (RCP) and recycled brick powder (RBP), two of the most popular CDW. Geopolymeric mortar and brick samples were produced by passing RCP and RBP through sieve No. 50 (with sand filler if necessary) and combining them with an alkaline solution made of water glass (WG) and NaOH. In this study, the mixture was then cured for three days at 80 °C in an oven. The effects of filler, RBP amount, WG amount, and the concentration of NaOH alkaline solution on the samples’ strength were examined. Additionally, XRF and SEM/XRD tests were performed to verify the materials' composition and microstructure. The mechanical strength of the samples showed an increase with the increase of RCP values, so the brick sample with filler showed the highest compressive strength, measuring 59.53 MPa. The study's samples exhibited strong mechanical properties. Additionally, all of the bricks' water absorption fell within the standard range. In summary, according to different standards, both waste concrete and waste brick can be used to produce geopolymer materials especially bricks for construction and paving purposes.

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Improvement of poorly graded sandy soil by using copper mine tailing dam sediments-based geopolymer and silica fume

Cited by 20 publications

References 51 publications

Influences of Multi-Component Supplementary Cementitious Materials on the Performance of Metakaolin Based Geopolymer

Influences of Multi-Component Supplementary Cementitious Materials on the Performance of Metakaolin Based Geopolymer

Copper And Zinc Mining Tailings as A Partial Replacement for Cement to Increase the Compressive Strength of Concrete

Facile fabrication of next-generation sustainable brick and mortar through geopolymerization of construction debris

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