Study on Stability Evaluation Method of Grouting Materials Based on Rheological Behavior
A duct grouting material stability testing program based on coaxial cylinder rheometer was designed,and the shear stability was defined to quantify the stability of slurries with different propor-tions.Two kinds of pastes with different stability were designed by viscosity modifier,and the relia-bility of shear stability was verified.The effects of superplasticizer and silica fume on the stability of duct grouting material slurry were studied by shear stability test.The results show that the addition of superplasticizer reduces the stability of the slurry,and silica fume can improve the stability of the slurry.The slurry with shear stability above 0.9 has better stability and uniformity.
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