Research on the Influence of Different Grouting Materials on the Durability of Inert Grout in Simultaneous Grouting
To effectively enhance the durability of synchronous grouting slurry,indoor testing methods were adopted to analyze the influence of different water-cement ratios,powder-ash ratios,cement-sand ratios,and expansive agent ratios on the volume shrinkage and strength attenuation rates of inert slurry,and to determine the controlling factors affecting slurry durability.The research findings indi-cate that:①The durability of inert slurry stone bodies gradually deteriorates with the increase of slur-ry stone age,with maximum volume shrinkage and strength attenuation rates of 22%and 20.9%,re-spectively,at 28 days.②Water-cement ratio,powder-ash ratio,and expansive agent ratio have signifi-cant impacts on the durability of inert slurry,therefore,considering the effect of inert slurry durability on the later operation of shield tunnels,it is necessary to adjust the slurry mix proportion in a timely manner.
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