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楊奕菲 ，劉嘉良 ，鞏    璇 ，周理安 ，李    飛

（北京建筑大學 北京節能減排與城鄉可持續發展省部共建協同創新中心 ，北京 100044)

摘   要： 為探究石粉對水泥基材料工作性能和凝結硬化的影響，開展了不同巖性石粉對水泥凈漿流動度和 凝結時間影響的試驗研究 ，分析了摻石粉水泥凈漿的流變性能及觸變性經時變化特性，分析了石粉亞甲藍值 ( MB 值）對水泥凈漿工作性能的影響規律 。研究表明： 水泥凈漿流動度隨著石粉 MB 值的增大而減小，水泥凈 漿的塑性粘度和屈服應力與石粉MB 值存在較好的線性相關性； 石灰石等碳酸鹽類石粉的加入可縮短水泥凈漿 的凝結時間，花崗巖等硅酸鹽類石粉的加入會延長水泥凈漿的凝結時間。

關鍵詞： 石粉； 工作性能； 流變特性； 凝結時間

中圖分類號： TU525      

文獻標志碼： A      

文章編號： 1005-8249 (2023) 06-0105-05

DOI : 10. 19860/j.cnki.issn1005-8249.2023.06.017

YANG Yifei , LIU Jialiang , GONG Xuan , ZHOU Lian , LI Fei

( Beijing Energy Conservation & Sustainable Urban and Rural Development Provincial and

Ministry Co-construction Collaboration Innovation Center, Beijing 100044 ,  China)

Abstract：Experimental studies were carried out on the influence of workability and setting time with the use of different lithology stone powder in cement-based materials. The time-dependent rheological properties and thixotropy of cement paste with stone powder were analyzed. The influence of methylene blue value (MB value) of stone powder on the workability of cement paste was also studied. The results show that the fluidity of cement paste decreases with the increase of the MB value of stone powder, and the plastic viscosity and yield stress of cement paste have a good linear correlation with the MB value of stone powder. The use of carbonate stone powders such as limestone can shorten the setting time of cement paste, while the silicate stone powders such as granite can prolong the setting time of cement paste.

Keywords: stone powder; workability; rheological properties; setting time;

?基金項目： 北京節能減排與城鄉可持續發展省部共建協同 創新中心資助項目  ( Supported by ECERC) 。

作者簡介： 楊奕菲  ( 1997—) , 男，碩士研究生，主要從事水泥基材料研究。

通信作者： 李飛  ( 1981 —) , 博士 ，教授，研究方向： 建筑 垃圾資源化。

收稿日期： 2023-09-19