The Evaluation Method of Particle Clustering Phenomena in RAP
| Autor: | Tao Ma, Zhanyong Fang, Weiguang Zhang, Xiaoming Huang, Guangji Xu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Clustering index
0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Stability (probability) lcsh:Technology 0201 civil engineering Degree (temperature) law.invention lcsh:Chemistry Sieve law 021105 building & construction Cluster (physics) General Materials Science Cluster analysis Instrumentation lcsh:QH301-705.5 Green pavement Mathematics Fluid Flow and Transfer Processes Aggregate (composite) business.industry lcsh:T Process Chemistry and Technology General Engineering Cluster phenomenon lcsh:QC1-999 Computer Science Applications Asphalt concrete Particle clustering lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 Extraction test and Cantabro-crushing test Biological system business lcsh:Engineering (General). Civil engineering (General) RAP lcsh:Physics Breakage behavior |
| Zdroj: | Applied Sciences Volume 9 Issue 3 Applied Sciences, Vol 9, Iss 3, p 424 (2019) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app9030424 |
| Popis: | The particle clustering phenomena in reclaimed asphalt pavement (RAP) particles is one of the most important factors to affect the efficient recycling of asphalt concrete. In this study, the particle composition, clustering degree, crushing properties and clustering stability of RAP were studied by extraction test and cantabro-crushing test. It was found that the particles above 4.75 mm were composed mainly of small particles with a large degree of cluster and poor stability. The coarse particles (> 4.75 mm) had a great influence on the variation of 4.75 mm sieve. Quantitative indexes of Percentage Loss rate (PL) and Stability Index (w) were proposed to evaluate the clustering degree and the stability of RAP. It provided a meaningful reference for the comparison of different RAP and the different crushing processes. In addition, the RAP could be divided into three kinds of structures, including weak cluster structure, strong cluster structure and old aggregate. The process of crushing the RAP was divided into three stages, which are weak structure-dominated, strong structure-dominated and the broken old aggregate. The weak structure had the largest degree of cluster and worst stability, resulting in a large variability of RAP, and it should be avoided in the crushing process. |
| Databáze: | OpenAIRE |
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