Optimizing the strength of geopolymer concrete incorporating waste plastic

In this work, we systematically examine several factors in an effort to maximise the strength of geopolymer concrete that includes recycled plastic. Geopolymer concrete specimens with varying amounts of plastic content, particle size distribution, alkaline activator concentration, mix design, additional materials, additives, and fibre properties were subjected to water absorption and compressive strength tests. Compressive strength was increased to 40 MPa, while water absorption was decreased to 1.5%, all as a consequence of raising the plastic content to 15%. In addition to the ideal concentration of 8 M sodium hydroxide and 3 wt% sodium silicate, the use of coarse plastic particles helped boost the material's mechanical qualities. The employment of a superplasticizer and fibre additives, in addition to the incorporation of silica fume, increased the strength and durability of geopolymer concrete. These results provide light on how to better incorporate waste plastic into the design and formulation of geopolymer concrete, a key ingredient in the development of environmentally friendly and functional building materials.