水泥混凝土路面板底脱空灌浆材料研究

Research on Grouting Material for Repairing Void under the Cement Concrete Slabs

通过灌浆材料配合比试验,分析了各种成分的掺量对其性能的影响,得出灌浆材料各种成分掺量的合理范围。在此范围内设计出7种不同配合比的灌浆材料,对试验路段的脱空板做现场灌浆试验,28 d用落锤式弯沉仪和探地雷达检测各种灌浆材料对水泥路面板底脱空的治理效果。试验结果表明:灌浆材料Ⅱ(水泥∶水∶砂∶减水早强剂∶膨胀剂=1∶0.45∶0.3∶0.01∶0.1)和Ⅳ(水泥∶水∶砂∶减水早强剂∶膨胀剂=1∶0.45∶0.2∶0.01∶0.08)对治理板底脱空效果较好。

By doing a large amount of grouting material mix ratio experiments and drawing lessons from research results in China,this project analyzed the impact of the dosage of various components on grouting material's performance;it obtained the result of reasonable dosage range of components of grouting material.According to the range obtained,seven kinds of grouting material with different mix ratio were designed and used for site grouting tests on void slabs of experimental road.28 days later,the treatment effect of all kinds of grouting material on void underneath cement pavement was learned by using FWD and GPR testing.The results indicated that the treatment effect of II(Cement∶ water∶ sand∶ water-reducing early strength agent∶ expansive agent = 1∶ 0.45∶ 0.3∶ 0.01∶ 0.1) and IV(Cement: water∶ sand∶ water-reducing early strength agent∶ expansive agent = 1∶ 0.45∶ 0.2∶ 0.01∶ 0.08) of grouting material had better effect.It can be regarded as a reference for cement concrete pavement maintenance engineering.