锂渣对混凝土徐变的影响

通过测试不同龄期的锂渣混凝土徐变,研究了锂渣掺量对混凝土徐变的影响,结合其孔结构、微观形貌和纳观结构,基于微纳观尺度揭示了其影响机理.结果表明:锂渣显著降低了混凝土徐变,且随着其掺量(≤20%)地增加,降低效果越来越好;锂渣可以细化混凝土孔隙,改善其内部结构;锂渣降低了LD C-S-H含量,增加了HD C-S-H含量;混凝土徐变度与体积孔隙率有着较好的线性关系.

Effect of Lithium Slag on Creep of Concrete

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.