煤沥青与石油沥青共混作筑路材料

介绍了国外煤沥青与石油沥青共混作筑路材料的发展概况、混合沥青胶体结构模型以及国产煤沥青共混初步试验结果。对两个国产石油沥青样品与一个煤沥青样品共混得到的混合沥青性质的初步试验表明，混合沥青对碎石特别是酸性碎石的粘附力高于原石油沥青。与石油沥青相比，混合沥青的抗高温变形能力强，并可降低生产沥青碎石混合料的操作温度。所得混合沥青样品多项指标接近德国和波兰同类产品的水平。

BLENDING OF COAL TAR PITCH WITH PETROLEUM ASPHALT FOR PAVING MATERIALS

On the basis of the development of blended paving materials of coal tar pitchwith petroleum asphalt (abb: pitch-asphalt), the test was performed with two asphalt and onecoal tar pitch samples to produce a pitch-asphalt paving materials. The results indicated that theadhesion to aggregate of the pitch-asphalt, specially acid aggregate, was bigger than that of as-phalt alone. The resistance to deformation of the pitch-asphalt was greater than that of asphaltalone. The producing temperature of the pitch-asphalt aggregate mixture would be lower thanthat of asphalt alone. The index of the pitch-asphalt approached the level of the same kind pro-duct in Germany and Poland.