GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 2.2 GNGTS 2023 Fig. 3. Decision tree criteria. Some criteria taken as an example are analyzed as follows. About emissions of CO2 (C111) the first three stages of cement manufacturing listed in the Environmental Product Declaration (EPD) of the product (corresponding to the A1-A3 phases of the Buzzi Unicem industry) and reported in "Report Cementi 2021" are among those that produce emissions. Sardinia's reference factory is situated close to Nuoro. The emissions are estimated to be 862 [kgCO2e] (Siniscola factory average), which is slightly higher than the industry standard. In order to construct the model according to the seven dimensions, the emissions parameter has also been added in the BIM environment modeling. The total is then increased by the predicted emissions for the A4 phase. By comparing the number of trucks (heavy vehicles) used for each alternative, the emissions connected to the transportation from the manufacturer to the industry and from that facility to the construction site are estimated. Calculation is in accordance with Commission Regulation EU 2017/2400, dated 12 December 2017. Finally, the literature is used to infer emissions related to the FRP production phases. The production of waste (C124) is based on the calculation of the volumes of the disposal of the demolished portions and from the data declared in the EPDs. The durability analysis (C211) illustrates the time-dependent evolution of the chloride-induced corrosion, predicted from multiphysics FE-based simulations for each intervention methodology, expressed as the loss of reinforcement area sections or the ratio between the corroded section Apt and original bar section A's. The analysis of the option involving pier replacing with a new one, result in a loss of the reinforcing area of roughly 11% after 50 years. Due to its excellent compactness, ultra-high performance concrete is utilized as repair materials in Alternative 2, which increases the durability of RC components exposed to corrosive environments. Since the diffusion