Dynamic response of rubberized geopolymer concrete column subjected to lateral impact

In contrast to Portland cement concrete, geopolymer concrete (GPC) relies on industrial by-products such as fly ash (FA) and slag as primary binders, significantly lowering greenhouse gas emissions and minimizing the environmental footprint of construction materials. Structural columns are liable to lateral impact throughout their lifespan; therefore, for structural safety, it is essential to investigate how well columns withstand such loading. The incorporation of crumb rubber in geopolymer concrete yields a sustainable and high-impact-resistant structure. This study presents a novel contribution by experimentally evaluating the lateral impact performance of rubberized geopolymer concrete (RuGPC) columns, an area with limited existing research. The RuGPC columns containing rubber aggregates of size 1–4 mm as fine aggregate replacement at 0 %, 10 %, and 20 % were analyzed using a pendulum impact testing instrument. According to the experimental results, RuGPC columns considerably lowered the peak impact force from 18.68 % to 26.61 % compared to the control column, reducing the likelihood of injury or fatality when used in scenarios such as underground car park columns. Furthermore, RuGPC columns exhibited greater flexibility than the control, with a 44.02 % increase in deflection before failure. The energy absorption was also significantly improved. Compared to the control, the 10 % and 20 % RuGPC columns showed a 42.91 % and 52.38 % increase in energy absorption, respectively. These findings underscore the novelty and practical relevance of RuGPC as a sustainable, high-performance material for impact-resistant structural elements.

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