易流型辅助胶凝材料的制备及其对混凝土性能的影响  

Preparation of easy-flowing supplementary cementitious material and their impact on the performance of concrete

作　　者：李清 胡卓强 张荣华 LI Qing;HU Zhuoqiang;ZHANG Ronghua(Sichuan Huashi Green Homeland Building Materials Co.Ltd.,Chengdu 610051,China)

机构地区：[1]四川华西绿舍建材有限公司,四川成都610051

出　　处：《新型建筑材料》2024年第5期69-73,共5页New Building Materials

基　　金：四川省科技计划项目重点研发项目(2023YFS0360)。

摘　　要：基于四川地区的锂渣、钛矿渣、磷渣3种固体废弃物,开展固废基易流型混凝土掺合料的研究。通过与各种掺合料多元体系复配获得了性能优异的易流型掺合料,并系统研究了该辅助胶凝材料对混凝土工作性能、力学性能及耐久性能的影响。结果表明,磷渣粉、钛矿渣粉和石灰石粉复掺替代粉煤灰时,混凝土浆体的屈服应力有小幅下降,扩展度普遍大于550 mm,工作性能得到优化;改性锂渣粉、钛矿渣粉和石灰石粉复掺替代矿粉时,在锂渣粉掺量不高时,混凝土工作性能和力学性能较优,但锂渣粉掺量过大时会增大混凝土塑性黏度,掺量建议不超过胶凝材料的10%。This study is based on the three solid wastes of lithium slag,titanium slag,and phosphorus slag in Sichuan region,and conducts research on solid waste based flowable concrete admixtures.A flowable admixture with excellent performance indicators was obtained by compounding with various admixture systems,and the influence of this auxiliary cementitious material on the workability,mechanical properties,and durability of concrete was systematically studied.The results showed that when phosphorus slag powder,titanium slag powder,and limestone powder were mixed to replace fly ash,the yield stress of the concrete slurry decreased slightly,the expansion degree was generally greater than 550 mm,and the working performance was optimized.When modified lithium slag powder,titanium slag powder,and limestone powder are mixed together to replace mineral powder,the workability and mechanical properties of concrete are better when the lithium slag powder content is not high.However,when the lithium slag powder content is too large,it will increase the plastic viscosity of concrete,and the recommended content should not exceed 10% of the cementitious material.

关 键 词：固体废弃物 易流型掺合料 锂渣粉 钛矿渣粉 磷渣粉 

分 类 号：TU528.09[建筑科学—建筑技术科学]