Combined effect of repeated loads and low temperatures on asphalt pavements

1994 ◽  
Vol 21 (4) ◽  
pp. 674-681 ◽  
Author(s):  
Yingwu Fang ◽  
Michel Sargious

This research was undertaken to study the combined effect of repeated vehicle loads and low temperatures on the design thickness for both recycled and virgin asphalt pavements. It included three parts of work: theoretical analysis, laboratory tests, and computation. In the theoretical analysis, the finite layer method was used instead of the conventional layered theory to obtain the relationship between vehicle loads and the mechanical parameters in the pavement layers. In the laboratory tests, the behaviour of a recycled asphalt concrete mix consisting of 42% reclaimed and 58% new material was compared with that of a virgin asphalt concrete mix of similar characteristics. Finally, a computer program FPAVE was developed to determine the pavement thicknesses directly and conveniently. These thicknesses were then plotted in the form of curves for comparing the two types of pavements as well as for comparison with the thickness at 22 °C. Key words: asphalt pavement, fatigue, pavement design, recycling, temperature.

2014 ◽  
Vol 934 ◽  
pp. 47-52 ◽  
Author(s):  
Audrius Vaitkus ◽  
Viktoras Vorobjovas ◽  
Donatas Čygas ◽  
Algis Pakalnis

In Lithuania, it has always has been an important issue to find durable and cost-effective solutions for paving low-volume roads. The conventional asphalt concrete structures were built using paving grade bitumen with the penetration of 70/100 or 100/150 over the recent 20 years. The performance of those pavements was satisfactory. As an alternative solution, the use of soft asphalt pavements was proposed. This technology is widely used in Nordic countries. But in Lithuania it has never been applied. Research on the designed soft asphalt mixtures was carried out and the trial on-site sections were constructed. The results of laboratory tests and on-site research were positive and promising. Based on that, the technology could be considered as successfully implemented and good quality was achieved.


2015 ◽  
Vol 13 (1) ◽  
pp. 21
Author(s):  
Alik Ansyori Alamsyah

KORELASI ANTARA TEMPERATUR PEMADATAN PADA CAMPURAN ASPAL BETON HASIL DAUR ULANG TERHADAP STABILITAS MARSHALLCorrelation Between Compaction Temperature In Mixed Asphalt Concrete Recycling of Stability of MarshallAlik Ansyori AlamsyahJurusan Teknik Sipil Fakultas Teknik – Universitas Muhammadiyah MalangAlamat korespondensi : Jalan Raya Tlogomas 246 Malang 65144Email : [email protected] improvement by adding an additional layer that will result in continuous thicker pavement layer thickness and material required dwindling. Besides, with the amount of dredging mix pavement roads that are not used in some places add to the waste pile. With treatment using pavement recycling technologies (recycling) is an alternative to overcome this problem because it has several advantages such as pavement can restore and maintain strength and overcome the geometric dependence of new materials. The addition of new material and additional material or material scratch mark on the old pavement is an alternative to increase the carrying capacity of the material scratchmark. The study was conducted at the Laboratory of University of Muhammadiyah Malang Highway. The quality of asphalt concrete mixtures with the addition of recycled asphalt can only be known through the Marshall test results (stability, melting plastic, the results for the marshal, and the cavity in the mix). Used asphalt is asphalt with a penetration of 80/100 is a variation of temperature to be used is 130°C, 12°C, 110°C, 100°C, 90°C and 80°C. From the results of the research can be seen that the decrease in the solidification temperature will decrease stability, Marshall Quotient for the entire binder content. For Flow values at a temperature of 130 ° C compaction - 80 ° C showed an increase.Keywords : Temperature Compaction, Asphalt Concrete Recycling resultsAbstrakPeningkatan jalan dengan cara penambahan lapis tambahan yang terus menerus akan mengakibatkan tebal lapis perkerasan semakin tebal dan bahan yang diperlukan semakin menipis. Disamping itu dengan banyaknya campuran perkerasan dari hasil pengerukan jalan yang sudah tidak terpakai menambah tumpukan limbah dibeberapa tempat. Dengan penanganan yang menggunakan teknologi daur ulang perkerasan (recycling) merupakan suatu alternatif untuk mengatasi masalah ini karena memiliki beberapa keuntungan seperti dapat mengembalikan kekuatan perkerasan dan mempertahankan geometrik jalan serta mengatasi ketergantungan akan material baru. Penambahan bahan baru dan atau bahan tambahan pada material bekas garukan perkerasan lama merupakan salah satu alternatif untuk meningkatkan daya dukung dari material bekas garukan. Penelitian dilakukan di Laboratorium Jalan Raya Universitas Muhammadiyah Malang. Kualitas campuran aspal beton hasil daur ulang dengan penambahan aspal baru dapat diketahui melalui hasil uji Marshall (stabilitas, kelelehan plastis, hasil bagi marshall, serta rongga dalam campuran). Aspal yang digunakan adalah aspal dengan penetrasi 80/100 sedang variasi temperatur yang akan digunakan adalah 130 °C, 120 °C, 110 °C, 100 °C, 90 °C dan 80 °C . Dari hasil penelitian dapat dilihat bahwa penurunan temperatur pemadatan akan berakibat turunnya stabilitas, Marshal Quotient untuk seluruh kadar aspal. Untuk nilai Flow pada temperatur pemadatan 130 °C – 80 °C menunjukkan peningkatan.Kata Kunci : Temperatur Pemadatan, Aspal Beton Hasil Daur Ulang.


CICTP 2020 ◽  
2020 ◽  
Author(s):  
Yan Li ◽  
Yanlong Han ◽  
Yuanbo Cao ◽  
Jiupeng Zhang ◽  
Fuyu Wang ◽  
...  

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Martin Lidmila ◽  
Petr Jasansky ◽  
Marek Pycha ◽  
Michael P.N. Burrow ◽  
...  

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2021 ◽  
Author(s):  
Thomas Schied ◽  
Alexander Nickol ◽  
Christian Heubner ◽  
Michael Schneider ◽  
Alexander Michaelis ◽  
...  

2013 ◽  
Vol 40 (2) ◽  
pp. 181-187 ◽  
Author(s):  
Jean-Pascal Bilodeau ◽  
Guy Doré ◽  
Jonas Depatie

The use of recycled asphalt pavement (RAP) aggregates as replacement for new materials in the pavement base weakens the layer in regards to the resistance to permanent deformation under repeated loading. A mechanistic based design procedure is proposed to ensure that base layers containing RAP particles have a similar rutting behaviour to base layers made of virgin aggregates. The design procedure allows calculating an asphalt concrete thickness increase that is based on permanent deformation behaviour of base materials. The calculation approach is based on multistage triaxial permanent deformation tests performed on granular material samples with varied RAP content. The tests allowed proposing an equation that relates permanent strain rate, RAP content, and deviatoric stress, which is the basis of the design procedure. Design charts are proposed to select adequate thickness increase for the asphalt concrete layer according to the expected RAP content in the base layer and asphalt concrete modulus.


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