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针对富水破碎地层注浆治理过程中传统水泥类材料难以实现注浆加固和堵水同步进行的难题,以硫铝酸盐水泥熟料和钢渣微粉为主要原材,成功制备了一种水泥基复合注浆材料(CGM)。通过与传统水泥材料进行性能对比试验,采用扫描电镜和X射线测试手段,分析了CGM材料制备工艺、组分含量和浆液制备条件对材料性能的作用规律,并检验了CGM材料的工程适用性。结果表明:CGM材料宜采用混合粉磨制备工艺,可显著提高其水化活性,且粉磨时间应不超过45 min。钢渣微粉含量越高,水灰比越大,结石体强度越低,凝结时间越长,水灰比超过1.2:1时,结石体后期会出现干缩。与传统水泥材料相比,CGM材料浆液凝结时间与黏度的环境敏感度低,具有显著的工程适用性和性能优越性。
Aiming at the difficulty of simultaneous grouting reinforcement and water plugging in the traditional grouting material grouting treatment in the water-rich fractured formation, a cementitious matrix was successfully prepared using sulphoaluminate cement clinker and steel slag as the main raw materials Composite grouting material (CGM). Through the performance comparison test with traditional cement materials, the effect of CGM material preparation process, component content and slurry preparation conditions on the material properties were analyzed by scanning electron microscopy and X-ray test, and the engineering applicability of CGM materials was tested. The results show that CGM should be prepared by mixing and grinding process, which can significantly improve the hydration activity, and the grinding time should not exceed 45 min. The higher the content of slag powder, the greater the water-cement ratio, the lower the stone strength, the longer the setting time, water-cement ratio of more than 1.2: 1, the stone body will shrink later. Compared with the traditional cement materials, CGM material slurry setting time and viscosity of the low environmental sensitivity, with significant engineering applicability and performance advantages.