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.

在这项工作中，使用热重分析和电阻率确定了稻壳灰（RHA）（0-15％）和水灰比为0.4的水泥浆的水化过程。采用X射线衍射（XRD）法和扫描电子显微镜（SEM）对固化3 h，1 d，7 d和28 d的试样的晶体组成和显微结构进行了调查。最后，研究了钢筋水泥浆的电参数（电阻和交流阻抗谱），以研究RHA对耐蚀性的影响。结果表明，RHA可通过促进水合作用和火山灰作用影响水泥的水化作用。电阻率和固化时间的评估函数与线性增加函数非常吻合。高于5％的RHA添加量表明，在更早的固化年龄（3–7 d）下，水泥浆的电阻率降低。同时，在较晚的治愈年龄（7-28 d），结果相反。此外，RHA还显示出对水泥浆中钢筋抗腐蚀性的积极影响。