利用盐湖提锂副产含硼氧化镁制备粉煤灰磷酸钾镁水泥

发布时间：2018-03-08 00:26

本文选题：盐湖提锂副产含硼氧化镁　切入点：磷酸钾镁水泥　出处：《硅酸盐学报》2014年11期 　论文类型：期刊论文

【摘要】：利用盐湖提锂副产含硼氧化镁(B-MgO)和磷酸二氢钾(KH2PO4,KDP)制备了不同粉煤灰掺量的磷酸钾镁水泥(MKPC)。研究了粉煤灰掺量对MKPC浆体的凝结时间、抗压强度及不同浸泡条件下对MKPC抗水性和耐海水腐蚀性能的影响,并对MKPC的物相组成和微观形貌进行了分析。结果表明:粉煤灰的掺入可延长MKPC的凝结时间,当粉煤灰掺量低于30%时,MKPC的后期抗压强度随粉煤灰掺量的增加而增大,同时掺入粉煤灰还可明显改善MKPC的抗水性和耐海水侵蚀性能;当粉煤灰掺量为40%时,制备出的粉煤灰MKPC可以满足其作为快速修补材料的各项要求。此外使用盐湖提锂副产B-MgO和KDP制备的粉煤灰MKPC可以明显降低MKPC材料的制备成本。
[Abstract]:Potassium magnesium phosphate cement with different content of fly ash was prepared by using boron magnesium oxide (B-MgO) and potassium dihydrogen phosphate (KH _ 2PO _ 4) KDP. the setting time of fly ash on MKPC slurry was studied. The effects of compressive strength and soaking conditions on the water resistance and corrosion resistance of MKPC were studied. The phase composition and microstructure of MKPC were analyzed. The results showed that the setting time of MKPC could be prolonged by adding fly ash. When the content of fly ash is lower than 30%, the later compressive strength of MKPC increases with the increase of the amount of fly ash, and the water resistance and seawater corrosion resistance of MKPC can be obviously improved by adding fly ash, and when the content of fly ash is 40%, the later compressive strength of MKPC increases with the increase of the content of fly ash. The prepared fly ash MKPC can meet the requirements of the rapid repair material, and the fly ash MKPC prepared by using B-MgO and KDP can significantly reduce the preparation cost of MKPC material.
【作者单位】：中国科学院青海盐湖研究所盐湖资源与化学重点实验室;中国科学院大学;南京航空航天大学土木工程系;
【基金】：国家自然科学基金项目(21276264)
【分类号】：TQ172.7

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