Flexural behaviour of one-part fibre-reinforced geopolymer beams

Abstract

This research focuses on the structural application of one-part fibre-reinforced geopolymer composite (OP-FRGC), a pioneering low-carbon, high-performance construction material. While extensive studies have been conducted on the basic mechanical properties and mix proportions of OP-FRGC, structural applications remain underexplored. This investigation of the flexural performance of steel-reinforced OP-FRGC beams employed four-point bending tests and digital image correlation (DIC) to elucidate bending failure mechanisms. The results were then compared with those of conventional steel-reinforced concrete (RC) beams. Findings indicate that the integration of fibres in OP-FRGC effectively distributes cracks and enhances flexural toughness. Additionally, the research evaluates the predictive accuracy of existing structural codes from China, the United States, and Europe for steel-reinforced OP-FRGC beams. A comparative analysis of the carbon emissions from these structural systems underscores the environmental advantages of steel-reinforced OP-FRGC beams, highlighting their potential to reduce the carbon footprint in the construction sector.