在不同pH 值、碳化、氯离子侵蚀条件下,利用磷酸镁水泥对不同掺量的硝酸铅进行固化。研究不同条件下重金属铅的浸出率规律,并对不同掺量的硝酸铅对磷酸镁水泥水化产物种类、水化产物形貌进行了探讨。研究表明,在 pH 值为2时,铅的浸出率最大,随着pH 值增加浸出率降低,但在 pH 值为12,浸出率又有所升高；在碳化条件下铅的浸出率随养护时间的延长先增加后趋于稳定；在氯离子侵蚀条件下,铅的浸出率随侵蚀时间的延长变化不明显。
The solidification of magnesium phosphate cement with different content of nitric acid lead in different pH value,carbonization conditions and chloride ions.Heavy metal leaching rate law and the influence of differ-ent content of nitric acid lead on types and morphology of cement hydration products were studied.Research shows that:when the pH value was 2,lead leaching rate was largest,and as the pH value increased the leac-hing rate decreased.But the pH value was 12,leaching rate was slightly increased.The lead leaching rate would increase and then level-off in carbonization conditions.In chloride ions conditions,leaching rate of lead with the extension erosion time does not change significantly.
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