Development of Engineered Cementitious Composites (ECCs) Incorporating Iron Ore Tailings as Eco-Friendly Aggregates

In this study, iron ore tailings (IOTs) are used as aggregates to prepare iron-ore-tailing-engineered cementitious composites (IOT-ECCs) achieve clean production. Some mechanical indexes, such compressive strength (fcu), four-point flexural (ff), axial (fc), deformation properties, toughness, and stress–strain behavior, studied. The mass loss, fcu relative dynamic modulus elasticity (RDEM), deterioration mechanism after the sulfate freeze–thaw (F-T) cycle discussed in detail. addition, pore structure analysis is performed using nuclear magnetic resonance (NMR), while a scanning electron microscope (SEM) utilized study micro-morphology. results showed that under 20–80% IOT replacement ratio, IOT-ECCs exhibited improvements their structure, resistance (F-T). most notable properties F-T were demonstrated by IOT-ECC with 40% IOTs (namely, IOT40-P2.0). Meanwhile, IOT40-P2.0 good well bonding interface of PF matrix. compactness matrix gradually deteriorated increased. research will promote application ECCs.