The present study investigated the carbonation of calcium sulfoaluminate (CSA) cement blended with blast furnace slag. Paste samples were prepared by substituting CSA cement with slag at dosages of 0, 30, 50, and 70 wt%. The samples were carbonated for 28 days at a CO₂ concentration of 3% after a sufficient pre-curing period. The test results indicated that slag incorporation did not affect the phase assemblage of the sample regardless of carbonation, while the incorporated slag promoted the formation of monosulfate and strätlingite upon carbonation in which this observation is closely related to the improved reaction degree of Si in the slag by carbonation. Meanwhile, monosulfate and ettringite were the first phases to be carbonated, while the C-A-S-H gel formed due to the carbonation of belite, thereby enhancing the compressive strength by refining the pore size in the gel pore region. On the other hand, the carbonation degree of the samples vastly increased as the slag content increased due to a small amount of ettringite formed along with the low reaction degree of slag which induced the development of macropores.

本研究研究了掺入高炉矿渣的硫铝酸钙（CSA）水泥的碳化。通过用0、30、50和70 wt％的剂量的渣代替CSA水泥来制备糊状样品。将样品在CO _2下碳酸化28天经过足够的预固化时间后浓度为3％。测试结果表明，无论碳酸盐化如何，炉渣的掺入均不会影响样品的相组成，而掺入的炉渣则促进了碳化过程中单硫酸盐和玄武岩的形成，这与炉渣中硅的反应程度的提高密切相关。通过碳化。同时，单硫酸盐和钙矾石是首先被碳酸化的相，而由于贝利特石酸盐的碳化而形成CASH凝胶，从而通过细化凝胶孔区域中的孔径来提高抗压强度。另一方面，