Performance Assessment of Ultra-High Durability Concrete Produced From Recycled Ultra-High Durability Concrete

The purpose of the work reported in this paper is to assess performance recycled ultra-high durability concrete (R-UHDC), produced using different fractions aggregate obtained from crushed (UHDC), as a substitute for natural aggregate. Four (R-UHDC) mixes were designed and manufactured with reference mix based on three replaced UHDC according two percentage replacement values (50 100%). effect environmental degradation parent was also addressed, aggregates subjected accelerated carbonation (replacement equal 50%). has been conducted framework activities Horizon 2020 ReSHEALience Project concrete. One key objective project formulate concept experimentally validate structures infrastructures exposed extremely aggressive scenarios. consortium defined “strain-hardening (fiber-reinforced) cementitious material functionalizing micro- nano-scale constituents especially added deliver high cracked state under exposure conditions.” In context, research investigate potential recycling mixes, developed validated previous employing them partial or even total fine production new UHDC. This supports cradle-to-cradle approach life cycle engineering applications. confirmed effective regeneration UHDC, attaining required rheological characteristics, mechanical properties (compressive strength, flexural toughness), (chloride penetration resistance, chloride migration, water capillary suction, resistivity). intended first step toward sustainability assessment end materials retrofit structural