硅酸盐通报2024，Vol.43Issue(1)：71-83,13.
凝灰岩机制砂混凝土工作性的流变学分析
Rheological Analysis of Workability for Tuff Manufactured Sand Concrete
摘要
Abstract
The production and application of manufactured sand(MS)provide an excellent opportunity for China's concrete industry to move towards low-carbon development.However,the complex characteristics of MS lead to poor workability and difficulty in prediction of concrete.In order to study the influencing factors and variation laws of workability for MS concrete based on rheological properties,this paper explored from two aspects:the characteristics of MS and concrete mix proportion parameters.Two-dimensional and three-dimensional relationship models between rheological properties and workability were established,and the significance of factors affecting the workability of tuff MS concrete based on rheological analysis was analyzed by grey relational analysis method.The experimental results show that the dynamic yield stress and plastic viscosity are closely related to the workability of concrete.With the increase of powder content,MS replacement rate,and sand ratio,the dynamic yield stress decreases first and then increases.The correlation between MS characteristics and various rheological properties of concrete is in a strongly correlated range.By properly adjusting the levels of these factors,the optimal workability required for actual engineering can be achieved.关键词
凝灰岩机制砂混凝土/流变学/工作性/灰色关联度分析/石粉含量/机制砂取代率Key words
tuff manufactured sand concrete/rheology/workability/grey relational analysis/powder content/manufactured sand replacement rate分类
建筑与水利引用本文复制引用
温宏平,宋鹏飞,汪愿,甘珑,王旭昊..凝灰岩机制砂混凝土工作性的流变学分析[J].硅酸盐通报,2024,43(1):71-83,13.基金项目
国家重点研发计划(2021YFB2601002) （2021YFB2601002）
国家自然科学基金面上项目(52178185) （52178185）
中国博士后科学基金面上资助(2021MD703885) （2021MD703885）
