曲线预应力孔道灌浆试验与施工

Experimentation and Construction of Curved Prestressed Duct Grouting

高强预应力钢束在高拉应力下对锈蚀极为敏感,一旦锈蚀,后果极为严重。孔道灌浆是防止预应力钢束锈蚀的最后一道屏障,可保证浆体满足泌水率、流动性、膨胀性、耐久性等性能要求,具有较高的抗压强度。

Strong prestressed wire bundles are sensitive to rust in the condition of high tensile stress if wire bundles are rusted, the result is damaging. Duct grouting is the last barrier for prevent prestressed wire bundles being rusted. It can ensure the slurry to satisfy with the performance requirement of bleeding rate, fluidity, expansion and durability, and it also has a high compressive strength.