This work evaluates the influence of a CO₂-saturated curing environment on thin (5 mm thick) boards of magnesium silicate hydrated (M-S-H) cement composites reinforced with cellulose fibers (CF). The first stage of the work consists of the optimization of the curing temperature when samples are subjected to high CO₂ curing conditions. By means of XRD, the optimal carbonation temperature was set at 45 °C, at which a higher peak intensity attributed to nesquehonite (MgCO₃·3H₂O) was reached. At the selected temperature, the carbonation reaction was assessed by TGA. Carbonation conditions promoted the formation not only of hydrated magnesium hydroxicarbonates (HMHC) crystals, but also of other poorly crystallized compounds. As a consequence, carbonation increased the total amount of hydrated phases present in the matrix. Mercury intrusion porosimetry (MIP) tests were performed in order to evaluate a modification of the pore structure after carbonation. In this regard, carbonation reduced total cumulative intrusion by up to 38%. Finally, bending tests revealed that carbonation increases the strength of the composites while preserving their high. This results also into unprecedented toughness values (8.78 kJ/m²) considering only the deflection up to the modulus of rupture (0.17%). Therefore, carbonation is presented as a curing technique able to leverage the potential of CF in fiber reinforced cementitious composites (FRCC).

这项工作评估了 CO _{2饱和固化环境对}用纤维素纤维 (CF) 增强的硅酸镁水合 (MSH) 水泥复合材料的薄板（5 毫米厚）的影响。工作的第一阶段包括优化样品在高 CO ₂固化条件下的固化温度。通过 XRD，最佳碳酸化温度设定为 45 ℃，在该温度下，菱镁矿 (MgCO ₃ ·3H _{2 ) 的峰强度较高。}O) 达到。在选定的温度下，通过 TGA 评估碳酸化反应。碳酸化条件不仅促进了水合碳酸氢镁 (HMHC) 晶体的形成，而且还促进了其他结晶不良的化合物的形成。结果，碳酸化增加了基质中存在的水合相的总量。为了评估碳化后孔隙结构的改变，进行了压汞法(MIP) 测试。在这方面，碳化减少了高达 38% 的总累积入侵。最后，弯曲试验表明，碳化可提高复合材料的强度，同时保持其高强度。这也产生了前所未有的韧性值（8.78 kJ/m ²) 仅考虑到断裂模量 (0.17%) 的挠度。因此，碳化作为一种​​固化技术，能够利用 CF 在纤维增强水泥复合材料 (FRCC) 中的潜力。