This study explores the mechanical properties of geopolymer mortars incorporating ceramic and glass powders sourced from industrial waste. A Box-Behnken design was employed to assess the effects of ceramic waste powder (CWP) content, alkaline activator ratio, solution-to-binder (S: B) ratio, and oven curing duration on the mortar's performance. Compressive strengths were measured at 3 and 28 days, and regression models were developed to predict these outcomes. The relationships between compressive strength, flexural strength, and ultrasonic pulse velocity (UPV) were also analyzed. Microstructural and molecular changes were investigated using scanning electron microscopy and fourier transform infrared spectroscopy. According to response surface methodology results, the maximum compressive strengths of 22.79 MPa at three days and 25 MPa at 28 days were achieved using a mix containing 85.8% CWP, a 1.02 sodium hydroxide (NH): sodium silicate (NS) ratio, a 0.647 S: B ratio, and a 12-h oven curing time. Optimal oven curing conditions resulted in 28-day compressive strength, flexural strength, and UPV values of 25.7 MPa, 5.62 MPa, and 5765 m/s, respectively..
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http://dx.doi.org/10.1038/s41598-024-82658-3 | DOI Listing |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11696182 | PMC |
Sci Rep
January 2025
Copernicus Institute of Sustainable Development, Utrecht University, Utrecht, The Netherlands.
This study explores the mechanical properties of geopolymer mortars incorporating ceramic and glass powders sourced from industrial waste. A Box-Behnken design was employed to assess the effects of ceramic waste powder (CWP) content, alkaline activator ratio, solution-to-binder (S: B) ratio, and oven curing duration on the mortar's performance. Compressive strengths were measured at 3 and 28 days, and regression models were developed to predict these outcomes.
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November 2024
Department of Civil Engineering, Faculty of Engineering, Batman University, 72000, Batman, Turkey.
Heliyon
October 2024
Bhagwan Mahaveer Viklang Sahayata Samiti (BMVSS), Jaipur, 302017, India.
The demand for affordable prostheses is particularly high in Low Middle-Income Countries (LMICs). Currently, sockets are predominantly manufactured using monolithic thermoplastic polymers, which lack durability and strength, or consumptive thermoset resin reinforcing with expensive composite fillers like carbon, glass, or Kevlar fibers. However, there exist unmet and demanding needs among amputees for procuring low-cost, high-strength, and faster socket manufacturing methods.
View Article and Find Full Text PDFPolymers (Basel)
September 2024
Department of Chemistry, Università di Torino, Via Pietro Giuria 7, 10125 Turin, Italy.
The cure kinetics of various epoxy resin mixtures, comprising a bisphenol epoxy, two epoxy modifiers, and two hardening agents derived from cardanol technology, were investigated through differential scanning calorimetry (DSC). The development of these mixtures aimed to achieve epoxy materials with a substantial bio-content up to 50% for potential automotive applications, aligning with the 2019 European Regulation on climate neutrality and CO emission. The Friedman isoconversional method was employed to determine key kinetic parameters, such as activation energy and pre-exponential factor, providing insights into the cross-linking process and the Kamal-Sourour model was used to describe and predict the kinetics of the chemical reactions.
View Article and Find Full Text PDFMaterials (Basel)
August 2024
School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China.
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