论文部分内容阅读
(一)沥青混凝土的试验高级路面中以沥青混凝土路面最为普遍,而沥青混凝土的使用须有科学的试验根据。过去我们修筑沥青混凝土时存在着不合理现象:1、只掌握沥青稠度、炒油温度,对于配合比例及用油量,只根据过去经验,或仅参考其他国家的规范,未进行科学的试验研究。缺乏用机械强度及各项物理性质来研究油量和各项矿质混合料的关系,尤其和矿物粉的关系。2、煤沥青油炒本身级配不良,空隙率过大,用它来修筑面层,易饱水受冻,造成面层剥落损坏。3、我局对沥青混凝土一向采用两层式,粗粒式混凝土4公分,油炒面层1公分,总
(A) Test of Asphalt Concrete Asphalt concrete pavement in the most common high-grade pavement, and the use of asphalt concrete to be based on scientific testing. In the past, there was an irrationality when we built asphalt concrete: 1. Only mastering asphalt consistency and frying oil temperature, we did not carry out scientific experimental studies only on the basis of past experience or just referring to the specifications of other countries . The lack of mechanical strength and the physical properties to study the relationship between the amount of oil and the mineral mixture, especially with the relationship between mineral flour. 2, coal tar oil scum itself graded bad, too much porosity, use it to build the surface, easy to full of water by freezing, causing surface spalling damage. 3, our bureau has always used two layers of asphalt concrete, coarse concrete 4 cm, oil fry 1 cm, total