摘要
To quantitatively estimate the workability of cement-based grouting material,from the perspective of rheology,the result of the static yield stress evaluated using the rate-controlled and stress-controlled modes,respectively,was compared using the Rheowin rheometer.Also,the correlation of workability and solid concentration of slurry with static yield stress was studied.Results show that the static yield stress of cement-based grouting slurry relates to the established slurry structure,and is the shear stress corresponding to the transformation of elastics to plastics;In rate-controlled mode,the static yield stress of the slurry is related to the shear rate.The higher the shear rate,the greater the yield stress of the slurry.For the stress-controlled mode,the result is more accurate and suitable for testing static yield stress under different water-cement ratios.Since the water-cement ratio has a good correspondence with the static yield stress and the static yield stress has a good correspondence with the slump flow of the slurry,the static yield stress is the minimum stress to be overcome when the slurry begins to flow and it reflects the yield behavior and structural stability of the cement.
作者
NAN Xueli
CHEN Hao
LI Rongyang
JI Jianrui
WANG Yi
TANG Weibin
南雪丽;CHEN Hao;LI Rongyang;JI Jianrui;WANG Yi;TANG Weibin(School of Material Science and Engineering,Lanzhou University of Technology,Lanzhou,730050,China;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology,Lanzhou,730050,China;Gansu Province Transportat Planning,Survey and Design Institute Co.,Ltd,Lanzhou,730000,China)
基金
Funded by Science and Technology Program of Gansu Provincial Department of Housing and Construction (No.JK2021-11)
National Natural Science Fundation of China (No.52161007)
Science and Technology Project of Gansu Provincial Department of Transportation
Natural Science Foundation of Gansu Province (No. 20JR10RA170)。
