中文摘要：

采用磷酸二氢铵、重烧镁砂、硼砂和模拟放射性焚烧灰制备水泥固化体，对含有模拟放射性焚烧灰的磷酸镁水泥固化体进行了性能研究，通过强度分析、抗冲击性能以及浸出率测试，分析了磷酸镁水泥对模拟放射性焚烧灰的固化性能，通过x射线衍射和扫描电子显微镜对样品物相和微观结构进行了研究，并测试了浸出率。结果表明：磷酸镁水泥具有良好的固化性能，在满足国家标准要求情况下，所制备的试样对含Cs和Sr的模拟焚烧灰包容量可达40％（质量分数），对Cs^＋的42d浸出率为2．6×10^-4cm／d，sr^2＋的42d浸出率为1．1×10.4cm／d，Cs^＋和sr2^＋的42d累计浸出值分别为0．20cm和0．07cm，均优于国家标准相关要求。

英文摘要：

Magnesium phosphate cement （MPC） was prepared by using ammonium dihydrogen phosphate, dead-burned magnesium oxide and borax as raw materials. The solidification performance of MPC was evaluated by compressive strength, anti-shocking test and leaching properties of the as-prepared samples. The phases and microstructure of samples were analyzed by X-ray diffraction and scanning electron microscopy, respectively. The results show that MPC has a superior performance for solidifying the simulated ra- dioactive incineration ash. The samples could solidify the incineration ash （with Sr and Cs） of 〉40% （in mass fraction）. The leaching rates of Cs and Sr obtained were 2.6 × 10^-4 cm/d and 1.1× 10^-4 crn/d, respectively. And their cumulative leaching fraction of 42 d were 0.20 cm and 0.07 cm, respectively. They were both lower than that of leaching rate required by the national standard.