沥青

With the freeway volumes and natural environment, property of flexible pavements deteriorates gradually owing to asphalt aging and aggregate finning and structure changing of asphalt pavement.

硕士毕业设计道路沥青的老化与再生研究（共69页，34156字）摘要在交通载荷和自然因素的作用下，由于沥青逐渐老化、混合料集料细化以及路面受力结构层的变化，沥青路用性能逐渐恶化，甚至严重影响行车安全。

On the basis of the detailed analysis on the production and use of impregnating pitch a...

根据国内外浸渍剂沥青的生产和使用情况，对加快我国浸渍剂沥青研制尽早实现工业化生产提出了建议

The write made the analysis and exploration of prevention and reduction the refecting cracks of asphalt road surface of the relayer on the disused cement concrete surface in the experiment of relayer of asphalt road surface pavement.

结合旧水泥混凝土路面做沥青加铺层的有效尝试，对常用的防止或减缓沥青加铺层反射裂缝的方法及机理进行了分析和阐述。

At some places, the ruts have been emerged Analyze the process of shattering and put forward some experiences and lessons of drainage design for consideration.

分析了沥青路面损坏形成的过程，提出了一些沥青路面排水设计的经验和教训。

Not mainly the ageing of resins and asphaltenes but that of saturates and aromatics cause the ageing of asphalt.

沥青热氧老化的原因主要是饱和分和芳香分的氧化，而不是胶质和沥青质的氧化。

Saturates and aromatics had a drastic change because of thermal oxidation in O2 atmosphere, while the two components had definite changes in air atmosphere.

最常用的判断沥青抗老化的方法是薄膜烘箱试验，TFOT适合于测定热和空气对沥青薄膜的影响。

After brushing bamboo with slushing compound and melted petroleum asphalt, the percentages of water-absorption of bamboo are 6.1% and 3.8%, respectively, after immersion in watertfor seven days.

用沥青液及熔化的石油沥青分别涂刷竹材，浸水七天后竹材的吸水量各为6.1％及3.8％，若用松香的酒精溶液涂布竹材，其防水效力不大，并且和松香的浓度不成正比的关系。

Lu Po new energy group premium coal, a metallurgical coke, raw benzene, tar quality chemical products anthracene oil, naphtha, wash oil, industrial naphthalene, in the warm asphalt, etc.

潞宝新能源集团的特级精煤、一级冶金焦、粗苯、优质焦油化工产品（蒽油、轻油、洗油、工业萘、中温沥青等）、优质甲醇等十几种产品畅销全国；冶金焦成功进入美国市场，中温沥青出口印度。

Main business: coal, Metallurgical coke, Bituminous coal, Coking benzene, Fuel oil, Mixed Oil, Refined Naphthalene , washed oil, Anthracene oil etc. GB products.

主营：煤炭、冶金焦、煤焦油、中温沥青、改质沥青、焦化苯、混合苯、燃料油、混合油、精萘、工业萘、硫酸铵、粗苯、洗油、蒽油等国标产品。

Selecting right asphalt and macadam and operating construction technique strictly are the guarantee of the good effect of synchronous macadam seal.

同步碎石封层技术是沥青路面养护的新工艺、新技术，性能良好的同步碎石封层机是实施同步碎石封层技术的基础，正确选用沥青和碎石、严格把握施工工艺是取得同步碎石封层良好效果的保证。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。