关键词: 注浆材料, 复合水泥砂浆, 机场道面, 不停航施工, 水平钻孔注浆

Abstract: To satisfy the material requirements of the horizontal grouting project at airports with non-stop flights, compound silicate cement and sulfo-aluminate cement compounding tests are conducted. The silicate-sulfur aluminate composite cement mortar meeting the construction requirements is prepared in many experiments, and the setting time, fluidity, 1d compressive strength of the materials are studied with the help of such equipment as Vicatometer, truncated cone circular mold and pressure testing machine. The results show a higher proportion of sulfo-aluminate cement has a shorter setting time; the water-cement ratio and water-reducing agent admixture exert a greater impact on fluidity and have some influences on other properties. With the best ratio confirmed, the results of drilling and grouting simulated by cylindrical strength specimen and field test section with HWD and ground penetrating radar show the composite cement mortar possesses satisfying properties, and the strength and structure of road surface are restored to the level before drilling, fully meeting the construction requirements at airports with non-stop flights.