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本文采用热重分析和电阻率来测试稻壳灰水泥净浆的水化进程.水泥净浆中稻壳灰的掺量为0～15％,净浆的水灰比为0.4.用X射线衍射方法和扫描电镜技术研究试件养护3 h、1 d、7 d和28 d后的晶体组成和微观结构.最后研究了RHA对水泥净浆埋入钢筋后的电学性能参数(电阻和交流阻抗谱)的影响.研究结果表明,RHA能够通过对水化的促进作用以及火山灰效应影响水泥的水化.RHA水泥净浆的电阻率与其养护龄期符合良好的线性增长关系.当养护龄期在早期(3 h～7 d),水泥净浆中RHA掺量超过5％时,RHA引起净浆电阻的降低;然而当养护龄期为晚期(7 d～28 d)时,结果恰好相反.此外,RHA能够对水泥净浆中钢筋的耐腐蚀性能起到促进作用.“,”Thermogravimetric analysis and electrical resistivity were used to determine the hydration process of cement paste with rice husk ash (RHA) (0?15％) and water-cement ratio of 0.4 in this work. X-ray diffraction (XRD) method and scanning electron microscopy (SEM) were used to survey crystal composition and microstructures of specimens cured for 3 h, 1 d, 7 d and 28 d. Finally, electrical parameters (electrical resistance and AC impedance spectroscopy) of steel bars reinforced cement paste were investigated to study the effect of RHA on the corrosion resistance. Results showed that RHA could affect the cement hydration by hydration promotion and pozzolanic effect. The evaluation function for electrical resistivity and curing ages fitted well with linear increasing function. The addition of RHA higher than 5 ％ demonstrated a decreasing role in the electrical resistivity of cement paste at earlier curing ages (3?7 d). Meanwhile, when at later curing ages (7?28 d) the result was the opposite. Moreover, RHA demonstrated positive effects on corrosion resistance of steel bars in cement paste.