赤泥高等级路面基层材料的工程应用

探讨了赤泥的大块率、混合料含水率、石灰剂量以及外加剂对路面基层强度的影响规律。结果表明,赤泥中粒径大于10mm的大块颗粒所占比例对试件的抗压强度有明显的影响,应该控制在10%以下;混合料含水率在45%左右时抗压试件强度最高;在实际的工程应用中推荐配合比为陈赤泥∶粉煤灰∶石灰=75∶15∶10;外加剂中石膏粉和造纸黑液最有利于提高基层初强度。采用路拌法施工工艺修建的一条全长约4km的烧结法赤泥路面基层示范公路,经过现场钻芯取样,强度达到了石灰工业废渣稳定土的一级和高速路的强度要求。

Engineering Application of Basic Level Materials of Red Mud High Level Pavement

The influence role of red mud bulk percentage, composite moisture percentage, lime quantity and additive for pavement basic level strength has been discussed in this paper. The result shows that the percentage of bulk with diameter ≥ 10 mm from red mud has influenced the compression stress and the percentage should be controlled less than 10%. The compression stress of test sample is the highest when the percentage of composite moisture is about 45%. Old red mud∶fly-ash ∶lime = 75∶15∶10, which is the best mix ratio in practical project application. Lime powder and pulping of the additive can improve the initial stress of basic level. A highway is 4 km, with pavement basic level of red mud through coring. And its stress has arrived at the first class of lime industry waste stable soil and the stress requirements of the expressway.