中文摘要：

了解锂渣对混凝土性能的影响是利用锂渣的关键。为此设计了3个常用水胶比、4个掺量共12组，成型混凝土抗压和氯离子渗透试件。探讨大掺量锂渣对混凝土力学性能、氯离子渗透性能的影响，并评价其活性。试验结果表明：锂渣掺量在20％以内时，混凝土早期强度虽较空白混凝土要低，但龄期超过28d时，抗压强度比空白混凝土高，氯离子渗透系数较空白混凝土要低。掺量大于20％时，高水胶比混凝土力学性能降低幅度较显著，氯离子渗透系数也向不利的方向发展，但都在10-12m2／s数量级。掺量从0％增加至60％时，活性因子呈先增大后降低的趋势，掺量为20％时，其活性因子最大。随着养护龄期的延长，特别是28d后锂渣参与二次水化，混凝土的密实度得以提高，力学性能和氯离子渗透性能在一定程度上得到了改善。

英文摘要：

To understand the impact of lithium slag on concrete performance is the key of to use lithium slag. For this, 12 groups molding concrete compressive strength and chloride ion penetration specimen were designed which include three waten-cement ratio and four dosage. The effect of high volume lithium slag on the mechanical properties of concrete, chloride ion permeability and evaluate its activity were investigated. The results showed that： the early strength of concrete is lower than the blank concrete when lithium slag content is less than 20%, it＇ s compressive strength is higher and chloride ion permeability coefficient is lower than the blank concrete when the age is more than 28 d. The mechanical properties reduces significantly and chloride ion penetration coefficient is bigger when the content is greater than 20%. The activity factor firstly increases then decreases when content in- creased from 0% to 60%, it is the largest when content is 20%, lithium slag participate secondary hydration when curing age is extended which the density of concrete is improved and even mechanical properties and chloride per- meability is improved to some extent.