Synergetic Impact of SBR Latex, Silica Fume, and Macro Synthetic Fibers on Durability Properties of E-Waste Concrete
摘要
Current study examined durability properties of concrete containing Electronic waste (E-waste) aggregates replacing natural coarse aggregates (NCA) in the range of 10%, 30% and 50%. The strength enhancement methods adopted for E-waste concrete were process of sand coating of E-waste aggregates, addition of Styrene Butadiene Rubber latex (SBR latex) ranging from 1% to 3% and Macro synthetic Fibers (MSF) from 0.25% to 1% and substitution of cement with silica fume (SF) in the range of 10% to 20%. Strength enhancement techniques were applied on E-waste concrete individually and synergistically to investigate their effects on different durability properties. Different durability properties investigated in the current research study were abrasion loss, porosity, water absorption, sorptivity as well as acid, chloride and sulphate resistance and alternate wetting and drying at all three replacement levels of E-waste aggregates with NCA. The combination of E-waste aggregates with SF and MSF produced specimens with the maximum durability results. Concrete with combination of 20% silica fume with 1% MSF along with 50% E-waste aggregates had substantial decline of water absorption, sorptivity and porosity by 99.8%, 96% and 89.4% respectively. Concrete with 20% silica fume 1% MSF and 50% E-waste resulted in strength reduction of only 0.47%, 0.23% and 0.18% due to acid, chloride and sulfate attacks respectively. Better resistance against alternate dry and wet conditions also resulted due to synergistic effect of SF and MSF. Synergistic effect of different strength enhancement techniques resulted in better durability properties of E-waste concrete at all three replacement levels with NCA.