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沥青冷再生分析路面的裂缝种类及成因！
来源：https://www.sddhfjx.com/ 日期：2021-03-09
沥青冷再生租赁路面的裂缝种类及成因：
The types and causes of cracks in asphalt cold recycling rental pavement are as follows
沥青路面出现的裂缝，按其成因不同分为横向裂缝、纵向裂缝和网状裂缝。裂缝是沥青路面主要的一种破损形式。
The cracks of asphalt pavement can be divided into transverse cracks, longitudinal cracks and network cracks according to their causes. Crack is a main damage form of asphalt pavement.
（1）横向裂缝是指垂直于行车方向的裂缝。按成因不同分为载荷型裂缝与非载荷型裂缝，载荷裂缝是由于路面结构设计不当或施工质量低劣或者由于车辆严重超载，致使沥青面层或半刚性基层内产生拉应力超过其疲劳强度而断裂。非载荷型裂缝是横向裂缝的主要形式，这种裂缝又分为两种情况：沥青面层温度缩裂荷基层反射裂缝。
(1) Transverse crack refers to the crack perpendicular to the driving direction. According to the different causes, it can be divided into load crack and non load crack. Load crack is due to improper design of pavement structure or poor construction quality or serious overload of vehicles, resulting in tensile stress in asphalt surface or semi-rigid base exceeding its fatigue strength. Non load crack is the main form of transverse crack, which can be divided into two kinds: temperature shrinkage crack of asphalt surface course and reflection crack of base course.
（2）纵向裂缝产生的原因一种情况是沥青面层分幅摊铺时，两幅接茬处未处理好，在车辆载荷与环境因素作用下逐渐开裂；另一种情况是由于路基压实度不均匀（含半填半挖路段）或由于路基边缘受水浸泡产生不均匀沉陷而引起。
(2) One of the reasons for the longitudinal cracks is that the joints of the two sections are not well treated when the asphalt surface is spread in different sections, and gradually crack under the action of vehicle load and environmental factors; the other is due to the uneven compaction of the subgrade (including the half fill and half cut section) or the uneven settlement of the subgrade edge caused by water immersion.
（3）网状裂纹主要是由于路面的整体强度不足而引起。其原因可能是路面结构
(3) Network cracks are mainly caused by the lack of overall strength of the pavement. The reason may be the pavement structure
设计不合理，路基路面压实度不足，路面材料配比不当或未拌和均匀等，或者由于路面出现横向或纵向裂缝后未及时封填，致使水分渗入下层，导致路面整体强度下降而引起。沥青路面在施工期间以及在长期使用过程中的老化也是导致沥青面层形成网裂的原因之一。
Unreasonable design, insufficient compactness of subgrade and pavement, improper proportioning or unevenness of pavement materials, etc., or due to the failure of timely sealing after transverse or longitudinal cracks on the pavement, water seeps into the lower layer, resulting in the decline of the overall strength of the pavement. The aging of asphalt pavement during construction and long-term use is also one of the reasons for the formation of Network Cracks in asphalt pavement.
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