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沥青碎石形成离析带的可能原因
来源：/ 日期：2022-09-15
沥青在路面运用中常见问题有哪些呢，下面济南沥青混凝土厂家为大家带来沥青碎石形成离析带的可能原因介绍以供参考。
What are the common problems of asphalt in pavement application? Next, Jinan asphalt concrete manufacturer will introduce the possible causes of asphalt macadam segregation zone for reference.
1.沥青碎石形成离析带的可能原因
1. Possible causes of segregation zone formed by asphalt macadam
（1）沥青混合料从贮料罐向运输车里输送时，由于高度原因，大骨料滚落在车厢附近，形成粗集料一次集中。
(1) When the asphalt mixture is transported from the storage tank to the transport vehicle, due to the height, the large aggregate rolls down near the carriage, forming a single concentration of coarse aggregate.
（2）运输车里的混合料卸向摊铺机时，大骨料滚落在摊铺机半厢附近，形成粗集料的二次集中。
(2) When the mixture in the transport vehicle is discharged to the paver, the large aggregate rolls down near the half car of the paver, forming the secondary concentration of coarse aggregate.
（3）摊铺机送料器在送料过程中，先将中间集料送于布料器，剩余粗集料留存在料斗中，摊铺机收斗时，形成粗集料的第三次集中。
(3) During the feeding process of the paver feeder, the intermediate aggregate is first sent to the distributor, and the remaining coarse aggregate is stored in the hopper. When the paver collects the hopper, the third concentration of coarse aggregate is formed.
2.沥青碎石离析的危害
2. Hazards of asphalt macadam segregation
（1）沥青碎石粗集料一旦形成集中，在碾压过程中，集料非常容易被压碎，骨料表面积增大，改变了原设计的路面配合比，油料偏少，造成集料碾压成型后松散，破坏路面结构，影响路面强度、行车和行车效果以及道路使用寿命。
(1) Once the coarse aggregate of asphalt macadam is concentrated, the aggregate is very easy to be crushed during the rolling process, and the aggregate surface area increases, which changes the original design pavement mix ratio. The oil is too small, causing the aggregate to become loose after rolling, damaging the pavement structure, affecting the pavement strength, driving safety, driving effect and road service life.
（2）粗集料集中，局部密实度差，孔隙率高，容易在路面形成积水，影响路面质量。
(2) Coarse aggregate is concentrated, the local compactness is poor, and the porosity is high. It is easy to form ponding on the pavement, which affects the pavement quality.
（3）粗集料集中，影响路面平整度及路面外观美感。
(3) The coarse aggregate is concentrated, which affects the pavement evenness and aesthetic appearance.
3.沥青碎石形成离析带方法
3. Methods to solve the segregation zone formed by asphalt macadam
（1）从运输车辆方面来
(1) Solve the problem in terms of transport vehicles
从拌和机贮料罐向运料车上卸料时，分三层放料，即每卸一斗混合料，汽车挪动一个位置。等一层放完后，再逐次进行二、三层放料，从而减少粗集料的集中。
When discharging materials from the mixer storage tank to the truck, the materials shall be discharged in three layers, that is, the truck shall move one position for each bucket of mixture. After the first layer is finished, the second and third layers shall be placed one by one to reduce the concentration of coarse aggregate.
施工过程中摊铺机前有运料车在等候卸料，即摊铺沥青混合料运输车的运量较摊辅速度有所富裕。
During the construction, there is a truck waiting for unloading in front of the paver, that is, the traffic volume of the truck for paving asphalt mixture is richer than the auxiliary paving speed.
（2）从摊铺机本身操作方面来
(2) Solve the problem from the operation of paver itself
在摊铺机螺旋二分之一处，边端装反向螺旋叶片；控制布料器处于中挡或高挡位置；控制适宜的送料仓口开度；均匀操作送料器和布料器；摊铺机摊铺一车料将完时，控制摊铺机速度，关闭送料器，等下车料倒入后再进行均匀送料和布料；在铺筑过程中保持摊铺机布料器不停转动，摊铺机两侧保持有不少于送料器高度三分之二混合料。
Install reverse spiral blades at the side end of the one half of the auger of the paver; Control the auger in the middle or high gear position; Control the appropriate opening of feeding silo; Operate the feeder and auger evenly; When the paver has finished paving a truck of materials, control the speed of the paver, turn off the feeder, and feed and distribute materials evenly after the materials are poured in; Keep the spreader of the paver rotating constantly during the paving process, and keep the mixture at least two-thirds of the height of the feeder on both sides of the paver.
（3）从混合料本身来
(3) Solve the problem from the mixture itself
减少混合料粒径大小悬差。控制沥青用量，使之偏高于设计用量。
Reduce the suspension of mixture particle size. Control the asphalt dosage to make it higher than the design dosage.
The possible reasons for the formation of segregation zone of asphalt macadam and the related solutions are explained here. Please come to our website for your ideas Share.
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