赣西地区锂渣粉对UHPC性能的影响_《混凝土与水泥制品》杂志社

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赣西地区锂渣粉对UHPC性能的影响

Effect of Lithium Slag Powder in Western Jiangxi on Properties of UHPC

2022年第12期

锂渣粉；超高性能混凝土；工作性；力学性能；收缩性能；孔结构

Lithium slag powder; Ultra-high performance concrete(UHPC); Workability; Mechanical property; Shrinkage property; Pore structure

2022年第12期

10.19761/j.1000-4637.2022.12.076.05

江西省科技厅重点研发计划项目（20212BBG71010）。

柴天红1，2，姜建松1，2，3，黄文聪1，2，3

1.江西省建筑材料工业科学研究设计院，江西南昌 330001；2.江西省超高性能混凝土工程研究中心，江西南昌 330001；3.江西省晶磊工程新技术开发有限公司，江西南昌 330500

柴天红1，2，姜建松1，2，3，黄文聪1，2，3

柴天红,姜建松,黄文聪.赣西地区锂渣粉对UHPC性能的影响[J].混凝土与水泥制品,2022(12):76-79,89.

CHAI T H,JIANG J S,HUANG W C.Effect of Lithium Slag Powder in Western Jiangxi on Properties of UHPC[J].China Concrete and Cement Products,2022(12):76-79,89

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摘要：研究了锂渣粉（含水率10%）对超高性能混凝土（UHPC）工作性、强度、收缩性能和孔结构的影响，并采用XRD和SEM分析了掺锂渣粉UHPC的水化产物和微观结构。结果表明：随着锂渣粉掺量的增加，UHPC的流动度降低，28 d抗压、抗折强度均呈先增大后减小的趋势，且当锂渣粉掺量为10%时强度达到最大；锂渣粉掺量越大，UHPC的收缩越小，这主要归因于锂渣粉中的水分在基体中起到了较好的内养护作用；随着锂渣粉掺量的增加，UHPC的孔隙率先减小后增大，其中，掺10%锂渣粉UHPC的孔结构较为致密。 Abstract: The influence of lithium slag powder(10% water content) on the workability, strength, shrinkage and pore structure of ultra-high performance concrete(UHPC) was studied, and the hydration products and microstructure of UHPC with lithium slag powder were analyzed by XRD and SEM. The results show that with the increase of lithium slag powder content, the fluidity of UHPC decreases, but the 28 days compressive strength and flexural strength increase first and then decrease, and the strength reaches the maximum when the lithium slag powder content is 10%. The larger the lithium slag powder content is, the smaller the shrinkage of UHPC is, which is mainly due to the better internal curing effect of water in lithium slag powder in the matrix. With the increase of lithium slag powder content, the porosity of UHPC decreases first and then increases, and the pore structure of UHPC with 10% lithium slag powder is relatively dense.

英文名 : Effect of Lithium Slag Powder in Western Jiangxi on Properties of UHPC

刊期 : 2022年第12期

关键词 : 锂渣粉；超高性能混凝土；工作性；力学性能；收缩性能；孔结构

Key words : Lithium slag powder; Ultra-high performance concrete(UHPC); Workability; Mechanical property; Shrinkage property; Pore structure

刊期 : 2022年第12期

DOI : 10.19761/j.1000-4637.2022.12.076.05

文章编号 :

基金项目 : 江西省科技厅重点研发计划项目（20212BBG71010）。

作者 : 柴天红1，2，姜建松1，2，3，黄文聪1，2，3

单位 : 1.江西省建筑材料工业科学研究设计院，江西南昌 330001；2.江西省超高性能混凝土工程研究中心，江西南昌 330001；3.江西省晶磊工程新技术开发有限公司，江西南昌 330500

柴天红1，2，姜建松1，2，3，黄文聪1，2，3

柴天红,姜建松,黄文聪.赣西地区锂渣粉对UHPC性能的影响[J].混凝土与水泥制品,2022(12):76-79,89.

CHAI T H,JIANG J S,HUANG W C.Effect of Lithium Slag Powder in Western Jiangxi on Properties of UHPC[J].China Concrete and Cement Products,2022(12):76-79,89

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参考文献

引用本文

Abstract: The influence of lithium slag powder(10% water content) on the workability, strength, shrinkage and pore structure of ultra-high performance concrete(UHPC) was studied, and the hydration products and microstructure of UHPC with lithium slag powder were analyzed by XRD and SEM. The results show that with the increase of lithium slag powder content, the fluidity of UHPC decreases, but the 28 days compressive strength and flexural strength increase first and then decrease, and the strength reaches the maximum when the lithium slag powder content is 10%. The larger the lithium slag powder content is, the smaller the shrinkage of UHPC is, which is mainly due to the better internal curing effect of water in lithium slag powder in the matrix. With the increase of lithium slag powder content, the porosity of UHPC decreases first and then increases, and the pore structure of UHPC with 10% lithium slag powder is relatively dense.

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