利用锂渣制备混凝土膨胀剂关键技术研究  

Study on Key Technology of Preparing Cement Expansive Material from Lithium Slag

作　　者：徐振兵 石齐 曾亮 Xu Zhenbing;Shi Qi;Zeng Liang(Jiangxi Building Materials Product Quality Supervision and Inspection Station Co.Ltd.,Nanchang,Jiangxi 330001;Jiangxi Building Materials Research and Design Institute Co.Ltd.,Nanchang,Jiangxi 330001)

机构地区：[1]江西省建材产品质量监督检验站有限公司,江西南昌330001 [2]江西省建材科研设计院有限公司,江西南昌330001

出　　处：《江西建材》2023年第1期56-58,共3页Jiangxi Building Materials

基　　金：江西省科技厅重点研发计划项目“锂渣综合利用技术及系列产品开发研究利用”(20214BBG74002)。

摘　　要：文中将1^(#)、2^(#)锂渣与硫铝酸盐水泥熟料粉按不同的比例制备成混凝土膨胀剂,分别研究锂渣和硫铝酸盐水泥熟料粉用量对膨胀剂限制膨胀率的影响规律。在确定硫铝酸盐水泥熟料粉的最佳用量后,研究1#锂渣用量对膨胀剂7d、28d的抗压强度的影响规律,从而确定锂渣膨胀剂的最佳配比。试验结果表明,膨胀剂的限制膨胀率随着硫铝酸盐水泥熟料粉用量的降低而降低,随着1#锂渣用量的增加呈先提高后降低的趋势,膨胀剂的抗压强度随着1#锂渣用量的增加、2^(#)锂渣用量的降低而降低;膨胀剂的最佳配比为1#锂渣:2#锂渣:硫铝酸盐水泥熟料粉=5:5:2,此时锂渣膨胀剂在水中养护7d和在空气中养护21d的限制膨胀率分别为0.039%、-0.01%,7d、28d抗压强度分别为33.4MPa、55.4MPa。In this paper,1^(#),2^(#)lithium slag and sulfur aluminum cement clinker powder were prepared into cement expansive material according to different proportions.The effects of the amount of lithium slag and sulfur aluminum cement clinker powder on the limited expansion rate of cement expansive material were studied respectively;After determining the optimum dosage of sulfur aluminum cement clinker powder,the influence law of the dosage of 1^(#),2^(#)lithium slag on the compressive strength of expansive agent at 7 and 28 days was studied,so as to determine the optimum proportion of lithium slag expansive agent.The test results show that the limited expansion rate of expansive agent decreases with the decrease of the dosage of sulfur aluminum cement clinker powder,increases first and then decreases with the increase of the dosage of 1 lithium slag,and the compressive strength of expansive agent decreases with the increase of the dosage of 1^(#)lithium slag and the decrease of the dosage of 2^(#)lithium slag;The optimum ratio of cement expansive material is 1^(#)lithium slag:2^(#)lithium slag:sulfur aluminum cement clinker powder=5:5:2.At this time,the limited expansion rates of lithium slag cement expansive material cured in water for 7 days and in air for 21 days are 0.039%,-0.01%respectively,and the compressive strength at 7 days and 28 days are 33.4MPa and 55.4MPa respectively.

关 键 词：锂渣 混凝土膨胀剂 硫铝酸盐水泥熟料粉 限制膨胀率 抗压强度 

分 类 号：TU522[建筑科学—建筑技术科学]