关键词: 锂渣;徐变;孔隙

Abstract: The effect of lithium slag content on the creep of concrete was studied by testing the creep of concrete at different ages.Based on the micro and nano scales,the mechanism was revealed according to the pore structure,micro morphology and nano structure.The results indicate that lithium slag decreases obviously the creep of concrete, and with the increase of the lithium slag content(≤20%), the decreased effect is more and more obvious.Lithium slag can refine the porosity and improve the internal structure.Lithium slag decreases the LD C-S-H content, and increases the HD C-S-H content.In addition,there is a good linear relationship between the specific creep and volume porosity of concrete.

Key words: lithium slag;creep;porosity