Study on mix proportion optimization of modified cement-based grouting material based on RSM
WANG Shenghao
ZHOU Changshan
CUI Naixin
Abstract：Ultrafine cement is used as the main cementitious material,and waterborne epoxy resin,cal-cium carbonate whisker and fly ash are added for modification.A grouting material suitable for rein-forcing loose and broken coal and rock mass is developed.The condition optimization test is carried out by response surface method,and the regression model is established.The influence of epoxy resin,calcium carbonate whisker and fly ash content on slurry fluidity and 28 d compressive strength of stone body is studied.The results show that the 28d compressive strength of grouting material stone body increases first and then decreases with the increase of epoxy resin,calcium carbonate whisker and fly ash content.The slurry fluidity increases first and then decreases with the increase of epoxy resin and calcium carbonate whisker content,and decreases with the increase of fly ash content.Through the response surface optimization,the optimal mix ratio of grouting material is obtained.Combined with the test results,it is proved that the model obtained by the response surface method has high accuracy,which can provide reference for similar grouting reinforcement projects.
Keywords：calcium carbonate whiskerepoxy resinresponse surface methodgrouting materialsopti-mization of mix proportion
Publication Date：2025-02-24
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)