Numerical Investigation on Vibration Screening Using Geofoam and Sand–Crumb Rubber Mixture Infilled Trench

Author(s):  
Abir Sarkar ◽  
Rahul Barman ◽  
Debjit Bhowmik
Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1200 ◽  
Author(s):  
Cheng ◽  
Liu ◽  
Ren ◽  
Huang

Crumb rubber, as a recycled material used in asphalt mixture, has gained more attention in recent years due to environmental benefits and the advantages of its pavement, such as excellent resistance to cracking, improved durability, less road maintenance, lower road noise, etc. However, the high-temperature performance of mixture with crumb rubber does not perform well. In order to improve the performance, this paper examined the effect of additives on the laboratory performance of asphalt rubber Stone Matrix Asphalt (AR-SMA) with additives. Three groups of AR-SMA: no additives, Styrene–Butadiene–Styrene (SBS) and Granular Polymer Durable additive (GPDa) were included, with no additives as a control group. Each group was investigated at three asphalt rubber content (ARC): 6.4%, 6.9%, 7.4% with regard to high-temperature and fatigue properties. The results show that with increasing ARC, the high-temperature performance of mixture without additive decreases, and the high-temperature performance increases first and then decreases for SBS and GPDa. Moreover, the rutting resistance of AR-SMA with GPDa at 6.9% ARC performs best. Under the condition of mixtures with appropriate ARC, AR-SMA with GPDa has higher fatigue life and sensitivity to fatigue cracking than the control group. Simultaneously, the fatigue performance of AR-SMA with GPDa is not as significant as that without additive with increasing ARC. In a word, GPDa is a good choice to improve the performance of AR-SMA. However, it should be noted that optimal asphalt content of AR-SMA mixtures with GPDa is higher than that of traditional mixtures.


2018 ◽  
Vol 1 (3) ◽  
pp. 559-570
Author(s):  
Cut Khairani ◽  
Sofyan M. Saleh ◽  
Sugiarto Sugiarto

Abstract : Endurance of asphalt concrete pavement on traffic load and temperature depends on the type and composition of aggregates, asphalt and filler used. Many attempts have been made to improve the quality of the mixture, such as using modified asphalt. Modified asphalt made by mixing asphalt pen. 60/70 with addition material. In this research, we used crumb rubber as an aggregate substitute material on AC-BC mixture. This study aims to determine the influence of additional substitution of used crumb rubber. The first step of the research is to find the optimum asphalt content (OAC), then add the crumb rubber as an aggregate substitute material from 0%, 1%, 2%, 3%, 4% and 5% to the weight of the mixture. The results showed that the percentage of crumb rubber influenced Marshall parameters value, especially the value of stability, VIM and VMA at 5.285% asphalt content. The highest stability value was found in the mixture of 2% crumb rubber is 1128.48 Kg. The highest VIM value is in the 5% mixture of the used crumb rubber is 16.94%. The highest VMA value is in the 5% mixture of the used crumb rubber is 27.88% and the highest flow value is in the 5% crumb rubber mixture of 4.97 mm. However, in MQ value increase and decrease that happened very big. No big changes in the density and VFA values for all substitutions of crumb rubber. For the durability value of AC-BC mixture with crumb rubber variation 90% requirement only on crumb rubber 1%.Abstrak: Ketahanan perkerasan beton aspal terhadap beban lalulintas dan temperatur sangat tergantung pada jenis dan komposisi agregat, aspal serta filler yang digunakan. Banyak usaha telah dilakukan untuk meningkatkan kualitas campuran, salah satunya dengan menggunakan aspal modifikasi. Aspal modifikasi dibuat dengan mencampur aspal pen. 60/70 dengan bahan tambah. Pada penelitian ini bahan tambah yang digunakan adalah parutan ban karet bekas sebagai bahan pengganti agregat pada campuran AC-BC. Penelitian ini bertujuan untuk mengetahui pengaruh substitusi tambahan ban karet bekas sebagai bahan pengganti agregat. Tahapan awal penelitian adalah mencari Kadar Aspal Optimum (KAO), kemudian dilakukan penambahan parutan ban karet bekas sebagai bahan pengganti agregat mulai dari 0%, 1%, 2%, 3%, 4% dan 5% terhadap berat campuran. Dari hasil penelitian menunjukkan penambahan persentase parutan ban bekas mempengaruhi nilai parameter Marshall, terutama nilai stabilitas, VIM dan VMA pada kadar aspal 5,285%. Nilai stabilitas tertinggi didapat pada campuran 2% parutan ban bekas yaitu 1128,48 Kg. Nilai VIM tertinggi ada pada campuran 5% parutan ban bekas yaitu 16,94%. Nilai VMA tertinggi ada pada campuran 5% parutan ban bekas yaitu 27,88% dan nilai flow tertinggi ada pada campuran 5% parutan ban bekas yaitu 4,97 mm. Namun pada nilai MQ kenaikan dan penurunan yang terjadi sangat besar. Nilai Density dan VFA tidak terjadi perubahan yang besar untuk semua substitusi variasi parutan ban. Untuk nilai durabilitas campuran AC-BC dengan variasi parutan ban yang memenuhi persyaratan 90% hanya pada pemakaian parutan ban 1%.


2020 ◽  
Vol 26 (3) ◽  
pp. 223
Author(s):  
Deka Syahputra ◽  
Bambang Sugeng Subagio ◽  
Eri Susanto Hariyadi

2011 ◽  
Vol 99-100 ◽  
pp. 1365-1369
Author(s):  
Yan Chun Li ◽  
Pan Zhang ◽  
Rui Lv

Crumb rubber modified asphalt can not only improve asphalt pavement performance, but also can achieve the waste re-use, further study on the crumb rubber modified asphalt is very important. This paper mainly discusses the action mechanism of waste tire rubber modified asphalt, and analysis the performance improvement of the asphalt when it is mixed with the waste tire rubber. By analyzing the test results of asphalt’s conventional, we find out that mixed the waste tire rubber in asphalt is the resulting in the improvement of asphalt’s performance. Lastly, it discusses waste tire rubber modified asphalt advantages and the prospects of development. Overall, popularize and application the asphalt-rubber mixture is valuable.


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