Komeil Rajaee , Meysam Pourabbas Bilondi , Mohammad Hossein Barimani , Mahdi Amiri Daluee , Mojtaba Zaresefat
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引用次数: 0
Abstract
While fine glass powder is a promising precursor for geopolymer production, its preparation is time-consuming and expensive. This study investigates using six different particle sizes of recycled glass – three uniform (fine and coarse) and three hybrid (combinations) – to reduce processing costs and optimize geotechnical and microstructural properties of clay-based geopolymers. Glass content varied from 0 % to 30 % by dry weight of soil, and a sodium hydroxide (NaOH) solution as an alkaline activator was used at three molar concentrations (2 M, 4 M, 6 M). A series of unconfined compressive strength (UCS), direct shear, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and Fourier transform infrared spectroscopy (FTIR) tests were conducted on samples. Results demonstrate that hybrid glass gradations containing both large (0.075–0.3 mm) and small (<0.075 mm) particles significantly improve the geotechnical properties compared to those with uniform fine particles, attributed to the enhanced dissolution of fine particles in the presence of coarser particles. The observed trends highlight the importance of combining particle sizes for optimal performance. This approach offers a more economical and effective alternative to traditional fine glass powder in clay soil geopolymers.
期刊介绍:
Case Studies in Construction Materials provides a forum for the rapid publication of short, structured Case Studies on construction materials. In addition, the journal also publishes related Short Communications, Full length research article and Comprehensive review papers (by invitation).
The journal will provide an essential compendium of case studies for practicing engineers, designers, researchers and other practitioners who are interested in all aspects construction materials. The journal will publish new and novel case studies, but will also provide a forum for the publication of high quality descriptions of classic construction material problems and solutions.