锂渣对水泥-聚羧酸减水剂体系早期Zeta电位和电导率的影响研究

摘要

Lithium slag,is the solid industrial waste that scale emissions from Xinjiang industrial factory ,it could be used in concrete in-dustry in Xinjiang as an active mineral admixture. However ,it will have a certain influence on the early performance of fresh concrete after mixed with the lithium slag. Therefore,it has measured the Zeta potential values of different dosages of lithium slag with different super-plasticizer amounts to the influence of the cement hydration at early age by the electro-acoustic method ,and measured the electrical con-ductivity in the system of cement hydration solution at the same time. The results showed that although the Zeta potential values of lithium itself close to zero,the Zeta potential of early cement hydration increased after its addition and the polycarboxylate superplasticizer parti-cles could preferential adsorption on the surface of lithium slag particles.%锂渣是新疆规模排放的固体工业废弃物，可作为混凝土用的活性矿物掺合料，在新疆混凝土工业中得到了一定的应用。但混凝土中掺入锂渣往往会对混凝土早期新拌性能产生一定的影响，为此，采用电声法测定了不同掺量的锂渣与不同掺量的聚羧酸减水剂对水泥早期水化Zeta电位的影响，并同时测定水泥水化溶液体系的电导率。结果表明，虽然自身Zeta电位值接近于零的锂渣掺入水泥后却提高了水泥水化早期的Zeta电位值，并且聚羧酸减水剂分子可能优先吸附与锂渣颗粒表面。