沥青

In virtue of the particularity of structure layer, the sample molding and design ways are different from the one for surface layer of mixes. Through parallel trial studying Marshall hit and circumrotate press molding, traditional Marshall design method and mechanics index method, the paper brings forward the molding and design method adapting to different types of ATBs.

由于其所处结构层的特殊性，试件成型方法、混合料设计方法均与沥青混合料面层有所不同，通过对比研究马歇尔击实成型和旋转压实成型、传统马歇尔设计方法和力学指标法，提出了适合不同沥青稳定碎石基层混合料类型的成型和设计方法。

The carbon foam were prepared by self-bubbling at high pressure from AR pitch added sodium dodecyl benzene sulfonate and Span-40, respectively. The bulk density, pore rate, compressive strength, thermal conductivity at room temperature and crystallitic parameters of carbon foam were measured. The rheological properties of AR pitch and pore structure of carbon foam were investigated.

以十二烷基苯磺酸钠和Span-40表面活性剂为添加剂，AR沥青为原料，制备炭素泡沫材料，测定了材料的体积密度、显气孔率、压缩强度、常温热导率以及微晶结构参数，研究了添加表面活性剂后AR沥青的流变性能和炭素泡沫材料孔胞结构的变化。

According to the testing deflection basins measured using Falling Weight Deflectometer of semi-rigid pavement on the experiment pavement, the structure layer moduli of asphalt pavement is backcalculated according to the principle of system identification method.

利用落锤式弯沉仪在实验路段的实测弯沉数据，采用系统识别方法对沥青路面结构层模量进行了反算，进而分析了沥青路面弯沉及反算模量与其代表温度之间的相关关系，并建立了相应的温度修正公式。

Fatigue cracking is one of the major modes of premature distresses in asphalt pavements. Cracks of asphalt pavements start as microcracks and later propagate, densify, and coalesce due to repeated traffic loading or low temperature thermal stresses or combinations of both to form macrocracks, and result in structural distresses of asphalt pavements.

疲劳开裂是沥青路面主要的早期破损形式之一，由于交通荷载和低温应力的反复作用，沥青路面中的微裂纹不断扩展、增密并贯穿连通形成宏观裂纹，导致。。。

The results show that the presence of durene helps to promote the reaction between pitch molecules and to adjust the distribution of pitch fraction and structure composition.

以均四甲苯为添加剂对沥青进行改性，初步考察了工艺条件（反应温度、反应时间、添加剂含量、体系压力等）对改性沥青软化点、残炭率及族组成的影响。

Relationships between durene modified pitch properties, such as soften point,coke yield and viscosity, and pitch fractions, especially TS fraction and PI fraction had been investigated.

考察了不同压力体系中均四甲苯改性沥青的TS组分和PI组分与沥青软化点、焦化值及粘度三种性能参数之间的相互关系。

The influence of top temperature of the extraction tower and that of resin tower, solvent rates were studied, and the optimized process conditions were obtained. The correlation between DAO yield and its quality was established. Furthermore, the preliminary explorement was made about the solvent deasphalting process when blending with FCC slurry.

在自行设计的6塔溶剂脱沥青装置上，本文对DHVR混合C〓溶剂脱沥青过程进行了系统的研究，对抽提塔、沉降塔塔顶温度和溶剂比的影响进行了考察，优化了工艺操作条件，建立了预测DAO收率与其质量之间的关系式。

The main content includes: analyze characteristic of water damage and influence to road; compare every index and determine method to bituminous mixture. Point out flet mechanism of aggregate and pitch from two respects of physics and chemical performance, probe into internal cause and external cause on road surface further.

主要内容包括：分析和归纳道路水损坏现象的特点和对道路产生的影响；对评价沥青混合料水稳性的各项指标及测定方法进行分析比较；从物理性能和化学性能两方面指出集料和沥青的粘结机理，进一步探讨路面产生水损坏的内因和外因。

With the Superpave Gyratory Compactor tests of SBS modified asphalt mixtures at different temperature and the relationship between viscosity and shear rate, a shear rate 60(1/s) was suggested, and the construction temperature was determined according to the viscosity ranges

通过研究得到了SBS改性沥青的系列&过程&评价指标：粘温指数VTS，高温等级温度T_和低温等级温度T_，得到了SBS改性沥青施工温度的确定方法，对合理评价改性沥青路用性能，控制路面施工具有重要意义。

Through the helminthes examination, according to the numerical Analysis, we get the detail parameters of the four-asphalt-mixed viscous elasticity. Through the mixed asphalt"s temperature-time effect, we get four materials" viscous elasticity in different temperature.

通过室内蠕变试验，运用数值分析手段得到了四种沥青混合料的一维粘弹性本构模型的具体参数，利用沥青混合料的温度时间效应的得出了不同温度四种材料的粘弹性本构模型参数。

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。