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沥青路面施工时为什么要使用胶轮压路机?
网址:http://www.dhfjx.cn    发布时间:2020-05-15
热拌沥青路面是是用加热的石料骨料与加热为液态的沥青配上填料(如磨碎的矿粉)和额外添加物(纤维等)在拌和站进行拌合。趁热用卡车运到施工现场,然后进行摊铺和压实。
Hot mix asphalt pavement is a mixture of heated stone aggregate and heated liquid asphalt with filler (such as ground mineral powder) and additional additives (fiber, etc.) in the mixing station. Transport to the construction site by truck while it is hot, and then pave and compact.
这里压实时沥青混合料要一直保持较高温度,目的是为了保证压实后达到一定密度(压实度)。
The asphalt mixture shall be kept at a high temperature during compaction, so as to ensure a certain density (degree of compaction) after compaction.
我所了解的压路机分为三种:钢轮压路机、胶轮压路机和振动式钢轮压路机。目前后两者在施工中运用的比较广泛。
The rollers I know are divided into three types: steel wheel roller, rubber wheel roller and vibrating steel wheel roller. At present, the latter two are widely used in construction.
压路机的目的:
Purpose of roller:
1.达到规范要求的密度(一般用压实度来控制);
1. Meet the density required by the specification (generally controlled by the degree of compaction);
2.压出平整的表面。
2. Press out the flat surface.
一般压实包括初压,复压和终压。终压是为了去除压路机的痕迹,是路面保持平整,一般不可省略,并且是采用钢轮压路机。如果初压可以满足密度要求,就不需要复压,但一般都还是保持着这三步。
General compaction includes initial compaction, re compaction and final compaction. The final rolling is to remove the traces of the roller, keep the road surface flat, generally can not be omitted, and the steel wheel roller is used. If the initial compaction can meet the density requirements, there is no need for recompression, but these three steps are generally maintained.
初压一般用钢轮压路机,但会出现推移现象,即滚筒前侧的混合料受压力进行横向移动,在压实后有可能产生裂缝。也有用胶轮进行初压的,但因为初压时温度较高,混合料容易粘附在轮胎上,而且留下的痕迹不容易去除,所以胶轮进行复压的机会比较多。
Generally, the steel roller is used for initial compaction, but there will be displacement phenomenon, that is, the mixture in front of the roller will move laterally under pressure, and cracks may occur after compaction. It is also useful to use rubber wheel for initial pressing, but because of the high temperature during initial pressing, the mixture is easy to adhere to the tire, and the traces left are not easy to remove, so there are more chances for rubber wheel to be re pressed.
我认为胶轮的优点主要有两点:
I think there are two main advantages of rubber wheel:
1.胶轮压实是一种揉搓式的压实,压实效果好,而且能够去除钢轮压实产生的细小裂缝;
1. Rubber wheel compaction is a kind of kneading compaction, which has good compaction effect and can remove the small cracks caused by steel wheel compaction;
2.胶轮压实会使混合料中沥青、矿粉、细集料等形成的胶浆上浮,使上表面更加紧密,防水性更好。
2. The rubber wheel compaction will make the slurry formed by asphalt, mineral powder and fine aggregate in the mixture float up, making the upper surface more compact and waterproof.
胶轮压路机的缺点或者不适用性:
Disadvantages or inapplicability of rubber tyred roller:
沥青路面一般分为两层或三层铺筑,铺筑上面层时用胶轮压路机容易产生不可消除的痕迹,而且一些级配设计比较严格的混合料在胶轮的揉搓下容易失去原本的级配特性,也不适宜用胶轮压路机;另外,如今高等级路面比较广泛采用的改性沥青粘性很大,很容易粘附在胶轮上,在施工时也难以处理。
Asphalt pavement is generally divided into two or three layers. When paving the upper layer, rubber wheel roller is easy to produce traces that cannot be eliminated. Moreover, some mixtures with strict grading design are easy to lose their original grading characteristics under the rubbing of rubber wheel, and they are not suitable for rubber wheel roller. In addition, the modified asphalt widely used in high-grade pavement is very sticky and easy to stick Attached to the rubber wheel, it is difficult to handle during construction.
本文由圆锥碎石机租赁_济南大黄蜂工程机械有限公司提供,关于移动碎石机锤头保养,就先介绍到这里了,想要了解更多关于移动碎石机的知识,欢迎来我们网站来电咨询http://www.dhfjx.cn/
This article is provided by Jinan Bumblebee Construction Machinery Co., Ltd. of cone crusher leasing. About the maintenance of hammer head of mobile crusher, it is introduced here first. If you want to know more about mobile crusher, please come to our website to inquire http://www.dhfjx.cn/.
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