Abstract: Water-seepage is one of the most serious diseases endangering Longmen Grottoes, impervious grouting is a fundamental way to control seepage. As the early use of superfine cement and epoxy resin materials have poor durability, severe salinity problem, more effective seepage materials are demanded urgently. In this paper the liquidity, shrinkage rate, compressive and flexural strength and other characteristics of five new material formulations which include metakaolin, natural hydraulic lime, sulphoaluminate cement and so on obtained from indoor test are analyzed. Results reveal that the material formulations of metakaolin, natural hydraulic lime, and bentonite are suitable for field grouting. In the field grouting test, the grouting pressure is determined 0.10.4 MPa, and the groutability and grouting parameters are discussed and analyzed. Moreover, for the evaluation of the grouting effect, the curing degree, density, filling degree, bonding degree and other aspects of the grouting materials are examined and analyzed after 28 days. Results show that the grouting effect of the metakaolin is the best.

Key words: Longmen grottoes, seepage grouting, compressive and flexural strength, grouting pressure, groutability