锂渣混凝土的孔结构参数与活性评价研究

为了解锂渣对混凝土性能改善的贡献情况，采用锂渣和水泥作为胶凝材料制备混凝土，研究了锂渣对混凝土孔结构参数和活性因子的影响规律。实验结果表明：锂渣掺量小于25%时，混凝土的后期强度都将超过空白混凝土；而掺量大于25%时，其力学性能降低幅度较大。同时，锂渣掺量不超过40%时，孔径均匀性的变化幅度较小，特别在养护龄期较小时尤为突出；随着养护龄期的延长，混凝土孔径得到不同程度的细化。锂渣掺量从0增至60%时，活性因子呈先增大后降低的趋势，但活性因子均大于0，且在锂渣掺量为20%时最大。

Research on pore structure parameters and activity of lithium slag concrete

To understand the contribution of lithium slag to the improvement of concrete performance, we research the influence of lithium slag on the concrete pore structure parameters and the activity factors by using the lithium slag as cementitious materials in concrete preparation. The experiments results show that the later strength of the concrete would be higher than that of a blank concrete when the lithium content is less than 25%; however, the mechanical properties reduced greatly when the lithium content exceeds 25%. When the lithium content is less than 40%, the variation magnitude of pore uniformity is small, especially for shorter curing period; the concrete pore becomes smaller with the extension of the curing age. With the increase of lithium slag content from 0 to 60%, the activity factors increases first and then decreases, and reaches the highest when the lithium slag content is 20%, and which is always greater than 0 .