Enhancement of permanent deformation resistance of modified asphalt concrete mixtures with nano-high density polyethylene

2020 ◽  
Vol 236 ◽  
pp. 117604 ◽  
Author(s):  
Alaa H. Abed ◽  
Hussain U. Bahia
Keyword(s):  
Asphalt Concrete ◽  
High Density Polyethylene ◽  
Permanent Deformation ◽  
High Density ◽  
Deformation Resistance ◽  
Modified Asphalt ◽  
Concrete Mixtures

Influence of Carbon Black on Storage Stability of HDPE-SBS Modified Asphalt

2011 ◽  
Vol 374-377 ◽  
pp. 1409-1413
Author(s):  
Xiao Wei Wu ◽  
Dong Wei Cao ◽  
Hai Yan Zhang
Keyword(s):  
Composite Material ◽  
Carbon Black ◽  
High Density Polyethylene ◽  
Storage Stability ◽  
High Density ◽  
Modified Asphalt ◽  
Stable Mechanism ◽  
The Difference ◽  
Styrene Butadiene ◽  
Sbs Modified Asphalt

In order to avoid the phase separation of the high density-polyethylene modified asphalt, a composite material modifier was prepared in the melt blending process with High density-Polyethylene (HDPE) and Styrene-butadiene-styrene (SBS) and a filler of Carbon black (CB). The storage stability of composite material (HDPE-SBS) modified asphalt was investigated by hot storage stability test and optical microscopic observation. The storage-stable mechanism of HDPE-SBS modified asphalt was analyzed also. The experimental results indicated that the difference of the softening point after storing at high temperature for 48h was very small. Micrographs of HDPE-SBS modified asphalt demonstrated that HDPE-SBS composite modifier particles dispersed uniformly and compactly and there were no obvious phase separations in the modified asphalt within a certain CB content range.

scholarly journals Influence of Hydrated Lime on the Properties and Permanent Deformation of the Asphalt Concrete Layers in Pavement

2015 ◽  
Vol 4 (1) ◽  
pp. 1-19 ◽  
Author(s):  
Ahmed F. Al-Tameemi ◽  
Yu Wang ◽  
Amjad Albayati
Keyword(s):  
Asphalt Concrete ◽  
Raw Materials ◽  
Permanent Deformation ◽  
Fatigue Cracking ◽  
Hydrated Lime ◽  
Concrete Pavement ◽  
Partial Replacement ◽  
Repeated Loading ◽  
Concrete Mixtures ◽  
Asphalt Concrete Pavement

Abstract Flexible or asphalt concrete pavement is the paving system most widely adopted all over the world. It has been recognized that there are many different types of the factors affecting the performance and durability of asphalt concrete pavement, including the service conditions, such as: the variation of temperature from mild to extremes and the repeated excessive axle loading as well as the inadequate quality of the raw materials. All of these when combined together are going to accelerate the occurrence of distresses in flexible pavement such as permanent deformation and fatigue cracking. As the result, there has an urgent need to enhance the ability of asphalt concrete mixture to resist distresses happened in pavement. Use of additives is one of the techniques adopted to improve pavement properties. It has been found that hydrated lime might be one of the effective additives because it is widely available and relatively cheap compared to other modifiers like polymers. This paper presents an experimental study of the hydrated-lime modified asphalt concrete mixtures. Five different percentages of the hydrated lime additive were investigated, namely (1, 1.5, 2, 2.5 and 3 percent). The hydrated lime additive was used as partial replacement of limestone filler by total weight of the aggregate. The designed Hot Mix Asphalt (HMA) concretes are for the application of three pavement courses, i.e. Surface, Leveling and Base. These mixtures are designed and tested following Marshall procedure and uniaxial repeated loading to evaluate permanent deformation at different temperatures of 20°C, 40°C and 60°C. The experimental results show that the addition of hydrated lime as a partial replacement of ordinary limestone mineral filler results a significant improvement on mechanical properties and the resistant to permanent deformation of the designed asphalt concrete mixtures.

scholarly journals ANALISIS INDEKS STABILITAS SISA PADA CAMPURAN ASPHALT CONCRETE DENGAN PENGGUNAAN LIMBAH PLASTIK SEBAGAI AGREGAT PENGGANTI

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Anissa Noor Tajudin ◽  
Latif Budi Suparma
Keyword(s):  
Asphalt Concrete ◽  
High Density Polyethylene ◽  
High Density

Sulitnya penguraian limbah plastik seharusnya menjadi pemacu untuk mengolah kembali limbah tersebut menjadi sesuatu yang bermanfaat, sehingga kualitas lingkungan terjaga dan limbah plastik memiliki nilai fungsi. Selain itu, curah hujan tinggi sering mengakibatkan genangan pada permukaan jalan yang dapat menurunkan keawetan jalan. Inovasi dalam perancangan perkerasan jalan perlu terus dilakukan agar didapat kualitas perkerasan yang mampu bertahan pada cuaca ekstrim. Penelitian ini dilakukan untuk mengetahui pengaruh air terhadap stabilitas campuran panas Asphalt Concrete – Binder Course (AC-BC) dengan penggunaan biji limbah plastik  High Density Polyethylene (HDPE) sebagai agregat pengganti. Variasi biji limbah plastik yang digunakan adalah sebesar 0%, 25%, dan 50% terhadap volume agregat yang lolos saringan no. 4 dan tertahan saringan no. 8. Pelaksanaan penelitian terdiri dari pemeriksaan karakteristik bahan dan campuran aspal panas AC-BC, perancangan gradasi agregat, perancangan variasi plastik dan gradasi baru campuran, pengujian rendaman standar, pengujian rendaman modifikasi, dan analisa stabilitas yang dilakukan pada perendaman selama 30 menit, 1 hari, 2 hari, 4 hari, dan 7 hari. Hasil analisis Indeks Stabilitas Sisa (IRS) menunjukkan campuran dengan variasi plastik 25% mengalami kehilangan kekuatan yang paling sedikit, atau dengan kata lain campuran tersebut lebih tahan terhadap pengaruh air dibandingkan dengan variasi plastik lainnya. Tingginya kekuatan campuran dengan variasi plastik 25% ditunjukkan dengan nilai Indeks IRS yang paling tinggi diantara variasi lainnya, yaitu sebesar 76,10% pada akhir masa perendaman selama 7 hari. Hanya campuran dengan variasi plastik 25% ini yang memenuhi persyaratan minimum IRS 75%.Kata kunci: AC-BC, limbah plastik, stabilitas, indeks stabilitas sisa

scholarly journals Effect of Nanoclay Particles on the Performance of High-Density Polyethylene-Modified Asphalt Concrete Mixture

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 434
Author(s):  
Ghada S. Moussa ◽  
Ashraf Abdel-Raheem ◽  
Talaat Abdel-Wahed
Keyword(s):  
Asphalt Concrete ◽  
High Density Polyethylene ◽  
Storage Stability ◽  
Chemical Change ◽  
Asphalt Binder ◽  
Moisture Damage ◽  
High Density ◽  
Damage Resistance ◽  
Negative Impacts ◽  
Roadway Construction

Utilizing polymers for asphalt concrete (AC) mixture modification has many drawbacks that hinder its wide implementations for roadway construction. Recently, research on employing complementary materials, such as nanomaterials, to balance negative impacts of polymers while enhancing the AC mixture’s performance has received great attention. This study aimed to investigate the effect of incorporating nanoclay (NC) particles on the performance of a high-density polyethylene (HDPE)-modified AC mixture. A 60/70 asphalt binder was first modified with HDPE, and then NC particles were gradually added at a concentration of 1–4% by weight of the asphalt binder. The binders’ physical characteristics, storage stability, and chemical change were scrutinized. AC mixture performance, including pseudo-stiffness, moisture damage resistance, stripping susceptibility, and rutting tendency, was investigated. A statistical analysis on the experimental results was conducted using Kruskal–Wallis and Dunn tests. Test results showed that employing NC/HDPE significantly increased penetration index and thereby enhanced binder temperature sensitivity. Moreover, it prevented oxidation action and separation and, therefore, enhanced binder storage stability. Furthermore, incorporating NC amplified pseudo-stiffness and significantly improved resistance against moisture damage and stripping of HDPE-modified mixtures. Moreover, it improved both elastic (recoverable) and plastic (unrecoverable) deformations of mixtures. The most satisfactory results were attained when incorporating 3% of NC.

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