Synthesized cement systems made with variable C₃A/C₄AF ratios, containing C₃S, gypsum and, optionally, calcite, were stored long-term at humid conditions at 5 or 20 °C, without any protection against atmospheric carbonation. Analytical techniques able to assess both the crystalline and amorphous phases were used. Experimental results were compared with thermodynamic simulations. The systems with C₃A/C₄AF < 1 better preserved the soundness of the CSH phase, which hosted iron, and prevented thaumasite formation. The addition of calcite in these systems inhibited carbonation. When occurred (mixtures without calcite), the carbonation was significantly more intense at ambient temperature. In the systems that underwent extensive deterioration, cross-linking of silicate structures, AFt decomposition, and iron release from the deteriorating CSH, occurred, while Al-incorporating amorphous silica, calcium carbonate polymorphs and hydrous iron oxide formed. The presence of unreacted C₃A in the systems with C₃A/C₄AF = 1, suggested that CSH decomposition was contributed by available sulfates.

_{用可变的 C 3} A/C ₄ AF 比制成的合成水泥体系，包含 C ₃ S、石膏和任选的方解石，在 5 或 20 °C 的潮湿条件下长期储存，没有任何防止大气碳化的保护措施。使用了能够评估结晶相和无定形相的分析技术。实验结果与热力学模拟进行了比较。C ₃ A/C ₄ AF < 1 的系统更好地保持了 C S的稳健性H 相，它承载铁，并防止奇马石的形成。在这些系统中添加方解石抑制了碳酸化。当发生时（不含方解石的混合物），碳酸化作用在环境温度下明显更强烈。在经历了广泛劣化的系统中，发生了硅酸盐结构的交联、AFt 分解和从劣化的 C S H 中释放铁，同时形成了掺铝的无定形二氧化硅、碳酸钙多晶型物和水合氧化铁。_{在 C 3} A/C ₄ AF = 1的系统中存在未反应的 C ₃ A ，表明 C S H 分解是由可用的硫酸盐促成的。