研究了早期高湿度空气养护、水中标准养护及密封养护对水泥石碳硫硅钙石型硫酸盐腐蚀的影响。采用X射线衍射 (XRD)、 傅立叶转换红外光谱 (FTIR)和扫描电子显微镜(SEM)等方法分析了水泥石经180 d硫酸盐侵蚀后的腐蚀产物。结果表明，早期高湿度空气养护，水泥石碳化生成的CaCO3填充于孔隙中，使表层结构更加致密，阻碍了SO42-等有害离子侵入，延缓了水泥石碳硫硅钙石型硫酸盐腐蚀过程。比较而言，早期密封养护，水泥水化不充分，水泥石内部缺陷相对较多，SO42-等有害离子容易侵入，水泥石碳硫硅钙石型硫酸盐腐蚀最为严重。

The effects of initial high humid aircuring, standard watercuring and sealedcuring on thaumasite form of sulfate attack (TSA) of cementbased materials were studied.The Erosion products after 180 days attack in sulfate solution were analyzed by the way of Xray diffraction(XRD) and fourier transform infrared spectroscopy(FTIR).And it was found that the TSA of the cement stone was delayed in high humid air resulting from that CaCO3 generated from carbonation was filled in the pores of the specimens, forming a compacted surface and restricting SO42- intrusion.In comparison, the extent of TSA of the specimens cured in sealed condition was most severe resulting from that large amount of interdefects in specimens for the lower hydration degree, and SO42- ions could intrude into specimens more easily.

重庆市自然科学基金重点资助项目(CSTC2007BA7019)