超细水泥注浆材料研究进展

Research Progress of Ultra-Fine Cement Grouting Materials

摘要: 普通水泥浆液用于细砂层和微裂隙岩体时，易受到颗粒架桥、渗滤堵塞、泌水和沉降等因素的限制。超细水泥通过细化颗粒改善浆液的注入能力，但比表面积增大也会带来需水量增加、絮凝团聚和流动性损失等问题，其性能受生产工艺、颗粒级配、水灰比及改性组分的共同影响。本文围绕2010年以来的相关研究，梳理普通水泥向超细水泥注浆材料发展的技术背景，重点讨论干法与湿法粉磨、颗粒细度及分散状态、水灰比对浆液和结石体性能的影响，并分析矿物掺合料、减水剂、纳米材料、速凝剂、膨胀剂、聚合物及纤维等改性组分的作用。在此基础上，结合砂层加固、矿山围岩注浆、水工防渗和锚固封孔等应用，归纳超细水泥注浆材料的适用条件与发展方向。现有研究表明，提高细度能够减轻部分颗粒阻塞，但实际可注性仍受粗颗粒尾部、团聚及沿程渗滤影响；水灰比应同时满足可泵性、稳定性和硬化后性能要求；复合改性则需要协调流动保持、凝结硬化与体积稳定性。后续研究应加强实际裂隙条件下的持续注入试验、受约束体积变形和界面耐久性研究，并通过现场监测检验室内配比的工程适用范围。

Abstract: Ordinary cement grouts used in fine sand layers and rock masses containing micro-cracks are often limited by particle bridging, filtration clogging, bleeding, and settlement. Ultra-fine cement improves groutability through particle refinement, but its increased specific surface area also raises water demand and promotes flocculation and loss of flowability. Its performance is governed jointly by production technology, particle gradation, water-cement ratio, and modifying components. This paper reviews research published since 2010 on the development of ultra-fine cement grouting materials from ordinary cement. The effects of dry and wet grinding, particle fineness and dispersion state, and water-cement ratio on grout and hardened grout properties are discussed. The roles of mineral admixtures, superplasticizers, nanomaterials, accelerators, expansive agents, polymers, and fibers are also summarized. Engineering applicability is further examined for sand stabilization, mine surrounding rock grouting, hydraulic seepage control, and anchor-hole sealing. Existing studies indicate that increased fineness can reduce some particle-blocking effects, whereas practical groutability remains affected by the coarse-particle tail, agglomeration, and filtration along the flow path. The water-cement ratio should satisfy requirements for pumpability, stability, and hardened performance, while combined modification should balance flow retention, setting and hardening, and volume stability. Future work should focus on sustained injection tests under realistic fracture conditions, constrained-volume deformation, and interfacial durability, with field monitoring used to verify the engineering applicability of laboratory mix proportions.