FIELD INVESTIGATION AND ASSESSMENT ON THE WEAR OF ASPHALT PAVEMENT MILLING MACHINE PICKS

IF 1.3 4区工程技术 Q3 TRANSPORTATION SCIENCE & TECHNOLOGY

Transport Pub Date : 2022-02-09 DOI:10.3846/transport.2021.16443

H. Sivilevičius, Mindaugas Martišius

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引用次数: 6

Abstract

Deteriorated asphalt pavement material is recycled applying proved technologies based on scientific principles and practical experience. The asphalt pavement layer during rehabilitation process is loosened by a mobile transport machine fracturing into the required material grading and called Reclaimed Asphalt Pavement (RAP). RAP is extracted while cutting asphalt chip in required depth at optimal speed by mean of changeable picks installed in a toolholder of milling machine rotating drum. During interaction with the asphalt pavement to be demolished, the wear of picks appears, and the dimensions of their elements decrease. Methodology and results of a field experimental research allowed statistically to determine and evaluate the wear dynamics of picks from 2 manufacturers are provided in this paper. The results provide that length of pick, diameter of carbide tip and diameter of steel body of picks from these manufacturers were decreasing proportionally to milled asphalt pavement surface. Applying the Fisher’s criterion it was found that the variances of the reduction of these geometrical parameters are the same and they satisfy the normal distribution according to the Kolmogorov’s criterion. All values of Student’s criterion calculated statistics were higher than the critical values, which indicated that the wear intensiveness of the picks of the 2 manufacturers differed significantly. These data can be used to select suitable picks for the milling machine according to their wear intensity.

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沥青路面磨镐磨损的现场调查与评价

根据科学原理和实践经验，采用成熟的技术对变质沥青路面材料进行回收利用。在修复过程中，沥青路面层通过移动运输机将其破碎成所需的材料级配，称为再生沥青路面(RAP)。通过安装在铣床转鼓刀柄上的可变镐，以最佳速度切割所需深度的沥青屑，同时提取RAP。在与待拆沥青路面相互作用过程中，截齿出现磨损，截齿单元尺寸减小。本文提供了一项现场实验研究的方法和结果，该方法和结果允许统计地确定和评估来自两个制造商的镐的磨损动态。结果表明:各厂家镐的长度、硬质合金尖头直径和钢体直径随着沥青路面的铣削而成比例减小;应用Fisher准则发现，这些几何参数的化简方差是相同的，并且符合Kolmogorov准则的正态分布。Student’s criterion计算统计值均高于临界值，说明两家厂家的镐的磨损强度存在显著差异。这些数据可用于根据磨损强度为铣床选择合适的镐。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Transport Engineering-Mechanical Engineering

CiteScore

3.40

自引率

5.90%

发文量

审稿时长

4 months

期刊介绍： At present, transport is one of the key branches playing a crucial role in the development of economy. Reliable and properly organized transport services are required for a professional performance of industry, construction and agriculture. The public mood and efficiency of work also largely depend on the valuable functions of a carefully chosen transport system. A steady increase in transportation is accompanied by growing demands for a higher quality of transport services and optimum efficiency of transport performance. Currently, joint efforts taken by the transport experts and governing institutions of the country are required to develop and enhance the performance of the national transport system conducting theoretical and empirical research. TRANSPORT is an international peer-reviewed journal covering main aspects of transport and providing a source of information for the engineer and the applied scientist. The journal TRANSPORT publishes articles in the fields of: transport policy; fundamentals of the transport system; technology for carrying passengers and freight using road, railway, inland waterways, sea and air transport; technology for multimodal transportation and logistics; loading technology; roads, railways; airports, ports, transport terminals; traffic safety and environment protection; design, manufacture and exploitation of motor vehicles; pipeline transport; transport energetics; fuels, lubricants and maintenance materials; teamwork of customs and transport; transport information technologies; transport economics and management; transport standards; transport educology and history, etc.