英语翻译第一段 The durability of an asphalt pavement is a function of the air-void content.The reason for this is the fact that the lower the air voids,the less permeable the mixture becomes.Too high an air-void content provides passageways th

英语翻译第一段 The durability of an asphalt pavement is a function of the air-void content.The reason for this is the fact that the lower the air voids,the less permeable the mixture becomes.Too high an air-void content provides passageways th
英语翻译
第一段
The durability of an asphalt pavement is a function of the air-void content.The reason for this is the fact that the lower the air voids,the less permeable the mixture becomes.Too high an air-void content provides passageways through the mix for the entrance of damaging air and water.Too low a voids content,on the other hand,can lead to flushing,a condition in which excess asphalt squeezed out of the mix to the surface.
第二段
Figure 4.1 shows a typical cross section for rigid pavements.In contrast to flexible pavements,rigid pavements are placed either directly on the prepared subgrade or on a single layer of granular or stabilized material.Because there in only one layer of material under the concrete and above the sub-grade,some call it a base course,others a subbase.
第三段
It is advantageous to maintain the dimensions of horizontal cross section elements as a multiple of a standard increment to facilitate design practice and construction layout.The dimensions of hori-zontal cross section elements are multiples of 0.1m,and all standards are given on this basis.An increment of 0.25m is used by some road authorities.
我的英语不好,这些事考试需要用的,希望能严谨一点.
这些是公路工程方面的内容,希望翻译能够严谨一些.

英语翻译第一段 The durability of an asphalt pavement is a function of the air-void content.The reason for this is the fact that the lower the air voids,the less permeable the mixture becomes.Too high an air-void content provides passageways th
第一段
一个沥青路面耐用年限是一个空气孔隙率的函数.这样做的原因是,较低的空隙率,透水少混合物而成.过高的空气通过孔隙率提供了混合损害空气入口通道和水分.缝隙太小,另一方面,可导致冲洗,在其中混合物中挤出多余的沥青到表面的一种情况.
第二段
图4.1显示了一个典型的刚性路面.和柔性路面的对比图,刚性路面直接放置在路基上或准备粒状或固定材料. 因为有单层下只在一个具体的物质层和以上的分等级,有人说是一个基础课程,其他子基.
第三段
它有利于维护水平截面尺寸它是一个多因素的一个标准的增加,便于设计实践与建设规划水平截面尺寸元素0.1m的倍数,所有标准;在此基础上,给出了一个增加0.25m被一些道路主管机关所用.