Interlocking Block mixed with Polyethylene Terephthalate: PET

Abstract

This research aims to improve the properties of interlocking block by incorporating PET plastic waste as a partial replacement for lateritic soil at proportions of 0, 5, 10, 15, and 20% by volume. The cement-to-soil ratio was maintained at 1:6, with the water content determined using the Standard Compaction Test. The interlocking block, sized 12.5 x 25 x 10 centimeters, were formed using a manual press machine. Various properties of the blocks were tested and compared with the community product standard for interlocking block (TCPS 602/2547). The results revealed that the compressive strength of the blocks tended to increase with higher proportions of PET plastic waste. All mixing ratios met the requirements of the TCPS 602/2547 standard for non-load-bearing blocks. Additionally, water absorption decreased as the PET content increased, meeting the criteria for load-bearing blocks under the same standard. These findings demonstrate the potential of using PET plastic waste as a sustainable material to enhance the performance and environmental friendliness of interlocking block.