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PRECAST CONCRETE ELEMENTSwww.cpi-worldwide.com CPI %u2013 Concrete Plant International %u2013 6 | 2025As far as known, no certification or quality label currently exists for reused construction products.Hollow core slab floorsPre-stressed hollow core slabs offer excellent reuse potential. Their prismatic cross-section, both in concrete and prestressed steel, allows for resizing without significant loss of reinforcement detailing. Due to the optimal use of both concrete and reinforcement steel, hollow core slabs are already a logical choice for minimizing CO2 impact.Characteristics of a pre-stressed hollow core slab%u2022 Manufactured on a long casting bed using extrusion or slip-forming%u2022 Pre-stressing only in the longitudinal direction using pre-tensioned pre-stressing steel%u2022 No transverse reinforcement%u2022 No shear reinforcement%u2022 No splitting reinforcement%u2022 The tensile strength of the concrete is a crucial property for a pre-stressed hollow core slab!Examples of design for deconstruction and reassemblyMock-up Peikko / Consolis Parma (2021)Initiated and motivated by the results from the first pilot, the second, larger scale mock-up, was arranged in 2021. Instead of dismounting and reassembling simple column pieces, the whole load-bearing frame was considered. Consolis Parma provided precast elements, and the tests were done in cooperation with Peikko. The reassembly of the structure went as smoothly as the first assembly by utilizing the same connections. The conclusion was clear; the bolted connection technology provides the technical feasibility to enable the effective reuse of precast structures.Fig. 5: Large-scale mock-up completed by Peikko and Consolis Parma in 2021. stressing.paul.euMax-Paul-Str. 188525 D%u00fcrmentingenGermany%uf028 +49(0)7371 / 5 00 - 0%uf036 +49(0)7371 / 5 00 - 111%uf02a stressing@paul.euPaul at YouTubestressing-channel.paul.euThe experts in Prestressed Concrete Technology.PAUL supplies%u2022 Prestressing installations incl. planning work%u2022 Anchor grips%u2022 Prestressing machinery(single-/multi-stressing jacks)%u2022 Strand pushing and cutting equipment%u2022 Automatic prestressing machines for railway sleepers%u2022 Prestressing equipment for bridge construction(prestressing cables and stay cables)Stability.Prestressing of precast concrete elements