Synergistic Effect of SBR Latex, Silica Fume and MSF on Durability Properties of HDPE Concrete

This study explores the use of High-Density Polyethylene (HDPE) aggregates as a partial replacement for natural coarse aggregates in concrete at 10%, 30%, and 50% levels to assess durability properties such as porosity, water absorption, and sorptivity. Strengthening techniques included sand coating of HDPE, addition of Styrene Butadiene Rubber (SBR) latex (1–3%), macro synthetic fibres (MSF) (0.25–1%), and partial cement replacement with silica fume (10–20%). Results showed that concrete with 50% HDPE, 20% silica fume, and 1% MSF exhibited superior durability compared to mixes with lower HDPE content. Water absorption, sorptivity, and porosity were reduced by 99.8%, 98.5%, and 62.8%, respectively, with this combination. Unlike previous studies focused on single techniques, this research highlights the synergistic effect of combined enhancements, leading to significantly improved strength and durability of HDPE-based concrete, offering a promising solution for sustainable construction and plastic waste management.