摘要
针对沥青路面层间抗剪问题,开展不同工况下的抗剪强度试验。研究得出:在使用粘结材料后,层间抗剪强度显著提高,其中粘结材料为super PCR改性乳化沥青的抗剪强度最大,为1.473MPa;温度对层间抗剪强度的影响较大,随着温度不断升高,沥青路面层间抗剪强度不断降低,在温度为60℃、粘结材料洒布量为0.5kg/m2的情况下,沥青路面层间抗剪强度仅为0.255MPa,较20℃时下降了82.65%;油污的污染比砂性土对层间抗剪强度的降低更为显著,当油污的洒布量为0.4kg/m2时,层间抗剪强度为0.353MPa;通过对不同的路面结构组合类型进行剪切试验可以得出:AC-13+AC-20层间抗剪强度最大的组合为4cm+6cm。最后通过工程案例分析,总结出提高沥青路面层间抗剪强度的施工质量控制措施。
Aimed to the inter- layer shear resistance problem of asphalt pavement,the paper conducted a serial of shear strength test under different working conditions. The results shows that： After the use of bonding material,the shear strength between structural layers increased significantly,and the shear strength of the adhesive material for super PCR modified emulsified asphalt is the biggest- 1. 473MPa; Temperature has great influence on the shear strength between layers,and the shear strength of asphalt pavement decreases with the increasing of temperature. When the temperature is 60℃ and the amount of the bonding material is 0. 5kg / m^2,the inter- layer shear strength of asphalt pavement is only 0. 255 MPa,which is 82. 65% lower than that of 20℃; The pollution of oil pollution is more significant than the decrease of the inter- layer shear strength of sandy soil. When the amount of the oil spill is 0. 4kg / m^2,the shear strength of the layer is 0. 353 MPa. Through the shear test of different types of pavement structure,it can be concluded thatthe maximum shear strength of the AC- 13 ＋ AC- 20 layer is the combination of 4cm ＋ 6cm. Finally,through the engineering case analysis,the paper summed up the construction quality control measures to improve the shear strength of the asphalt pavement layer.
出处
《北方交通》
2016年第11期42-45,49,共5页
Northern Communications
关键词
沥青路面
层间抗剪强度
粘结材料
污染程度
Asphalt pavement
Inter-layer shear strength
Bonding material
Degree of pollution
