This study verified the effect of liquid CO₂ admixture on fresh, hardened, and durability properties of concrete in-situ. It was found that the overall compressive strength of the concrete increased by approximately 5% after 7 days and by about 3% after 28 days. The t-test, however, revealed no statistically significant difference between the two groups of samples in terms of 28-day compressive strength for concrete mixes. Therefore, using liquid CO₂ admixture may not help with significant strength improvement and consequently, with reducing cement content within the mix design. In addition, results showed that liquid CO₂ does not significantly affect the fresh, hardened, or durability properties of concrete. In addition, XRD and SEM techniques were performed on paste samples to evaluate the chemical effect of CO₂ admixture on hydrated cement, and hydration products.

_{本研究验证了液态 CO 2}外加剂对现浇混凝土的新鲜、硬化和耐久性的影响。结果发现，混凝土的总抗压强度在 7 天后增加了约 5%，在 28 天后增加了约 3%。然而， t检验显示两组样品在混凝土混合物的 28 天抗压强度方面没有统计学上的显着差异。因此，使用液态 CO ₂外加剂可能无助于显着提高强度，因此也无助于减少配合比设计中的水泥含量。此外，结果表明液态CO ₂不会显着影响混凝土的新鲜、硬化或耐久性。此外，对糊状样品进行了 XRD 和 SEM 技术，以评估 CO ₂混合物对水化水泥和水化产物的化学影响。