Experimental Study on Grouting and Water Blocking Reinforcement of Cement Based Admixture in FZ-H800 Roadway
LIU Limin
LI Yanhui
YAN Xu
ZHANG Futao
ZHANG Jinpeng
Abstract：In view of the high rebound rate,insufficient early strength,poor impermeability and anti-cracking performance and other issues of current grouting materials,a cement-based additive for FZ-H800 grouting was developed.The slurry with different dosage of the admixture was tested.The coagulation time,compressive strength,impermeability and swelling rate of the formulation slurry were measured by “ BGF-7 type of needle grouting agent coagulation time tester ”,no side-limit pressure tester,impermeability test and self-developed expansion rate test device.The analysis shows that the best admixture dosage is 10％,the initial coagulation time of the formula grout with 10％ admixture dosage is 184 s,the final coagulation time is 339 s,and the coagulation time is fast;the strength can reach to 45 MPa in 7 days,and the strength can be close to or reach to 70 MPa in 28 days;impermeability level can reach P8 above;the expansion rate can reach to 0.31.FZ-H800 grouting special cement-based admixture has the characteristics of fast condensation,early strength,high impermeability and micro-expansion.
Keywords：grouting materialwater pluggingcement based admixtureFZ-H800formula slurryperformance index
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 40-43 )