scholarly journals Rutting Resistance of Hot Mix Asphalt Containing Coarse Recycled Concrete Aggregates Coated with Waste Plastic Bottles

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Alireza Azarhoosh ◽  
Mehdi Koohmishi ◽  
Gholam Hossein Hamedi
Keyword(s):  
Asphalt Concrete ◽  
Cement Mortar ◽  
Permanent Deformation ◽  
Recycled Concrete ◽  
Concrete Aggregate ◽  
Creep Tests ◽  
Stiffness Modulus ◽  
Waste Plastic ◽  
Rutting Resistance ◽  
Dynamic Creep

The use of recycled concrete aggregate (RCA) as a part of coarse aggregates in asphalt pavements confers economic and environmental benefits. Coarse RCA (CRCA) has inferior mechanical and physical properties compared to natural aggregates due to very porous and weakly adhered cement mortar. In this study, CRCA surfaces were coated with waste plastic bottles (WPB) and used at 15%, 30%, and 50% in the asphalt concrete. The Marshall, stiffness modulus, and dynamic creep tests were performed to determine the strength of hot mix asphalts against rutting. The results revealed that the use of untreated CRCA reduced the Marshall quotient and the rutting resistance of the asphalt concrete. The results of the stiffness modulus and dynamic creep tests indicated that CRCA incorporation increased permanent deformation in the tested specimens due to the reduction of asphalt concrete stiffness. However, the asphalt concrete containing treated CRCA had lower permanent deformation because WPB promotes CRCA stability by penetrating its void and reinforcing cement mortar. Furthermore, by raising the temperature, the strength of all asphalt concretes decreased against rutting, and the reduction rate was higher in the modified specimens.

Effects of recycled concrete aggregate on stiffness and rutting resistance of asphalt concrete

2017 ◽  
Vol 136 ◽  
pp. 386-393 ◽  
Author(s):  
Aleksandar Radević ◽  
Aleksandar Đureković ◽  
Dimitrije Zakić ◽  
Goran Mladenović
Keyword(s):  
Asphalt Concrete ◽  
Recycled Concrete ◽  
Concrete Aggregate ◽  
Recycled Concrete Aggregate ◽  
Rutting Resistance

scholarly journals INFLUENCE OF FINE RECYCLED CONCRETE AGGREGATE ON THE PROPERTIES OF ASPHALT MIXTURES

2018 ◽  
Vol 13 (1) ◽  
Author(s):  
Aleksandar Radević
Keyword(s):  
Experimental Research ◽  
Significant Influence ◽  
Permanent Deformation ◽  
Asphalt Mixtures ◽  
Recycled Concrete ◽  
Concrete Aggregate ◽  
Recycled Concrete Aggregate ◽  
Stiffness Modulus ◽  
Water Sensitivity ◽  
Base Course

The objective of this paper was to assess the possibility of using fine recycled concrete aggregate (RCA) in asphalt mixtures. The experimental research included four asphalt mixtures with partial natural aggregate substitution by fine RCA (0/4 mm), in the amount of 0% (control mixture), 15%, 30% and 45%, by mass. All asphalt mixtures were designed for the base course. The stiffness modulus of asphalt mixtures with RCA was lower compared with the control mixture. The use of fine RCA had no significant influence on the water sensitivity and ranged from -2.4% to +1.7% relative to the control mixture. Resistance to permanent deformation increases with the addition of up to 30% fine RCA.

scholarly journals Influence of Partial Coarse Fraction Substitution of Natural Aggregate by Recycled Concrete Aggregate in Hot Asphalt Mixtures

2019 ◽  
Vol 12 (1) ◽  
pp. 250 ◽  
Author(s):  
Debora Acosta Álvarez ◽  
Anadelys Alonso Aenlle ◽  
Antonio José Tenza-Abril ◽  
Salvador Ivorra
Keyword(s):  
Asphalt Concrete ◽  
Coarse Fraction ◽  
Asphalt Mixtures ◽  
Recycled Concrete ◽  
Construction And Demolition Waste ◽  
Recycled Aggregate ◽  
Concrete Aggregate ◽  
Recycled Concrete Aggregate ◽  
Demolition Waste ◽  
Natural Aggregate

The main objective of this work is to evaluate the properties of hot asphalt mixtures that have been manufactured with different recycled concrete aggregate (RCA) percentages (0%, 20%, 40%, 60% and 80% of the fraction 5–13 mm) and asphalt (4%, 4.5% and 5%). Dense asphalt mixtures were made; partially replacing the natural aggregate (NA) fraction between 5 and 13 mm. Marshall specimens were manufactured to determine the main properties of the asphalt concrete (AC) in terms of density, voids, stability and deformation. Additionally, the optimal asphalt content (OAC) was determined, and measured the water sensibility, the stiffness modulus and the permanent deformation. The results corroborate the potential for using these sources of construction and demolition waste (CDW) as a RCA in asphalt concrete and show that the hot asphalt mixtures with up to 40% substitution of natural aggregate by recycled aggregate in the fraction 5–13 mm present good behavior.

scholarly journals Effect of Hydrated Lime on Indirect Tensile Stiffness Modulus of Asphalt Concrete Produced in Half-Warm Mix Technology

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4731
Author(s):  
Mateusz M. Iwański
Keyword(s):  
Asphalt Concrete ◽  
Permanent Deformation ◽  
Active Agent ◽  
Hydrated Lime ◽  
Partial Replacement ◽  
Stiffness Modulus ◽  
Limestone Filler ◽  
Tensile Stiffness ◽  
Lime Content ◽  
Indirect Tensile

Half-warm mix asphalt (HWMA) mixtures can be produced at temperatures ranging from 100 °C to 130 °C, depending on the production methods used. The lowest mixing temperature can be achieved by using water-foamed bitumen. The mixture should be characterized by a long service life, defined by the resistance to permanent deformation and high stiffness modulus at temperatures above zero. It is therefore important to ensure the adequately high quality of the bitumen binder. Bitumen 50/70 was provided with appropriate quality foaming characteristics (expansion ratio, ER, half-life, t1/2) by adding a surface-active agent (SAA) at 0.6 wt % before foaming. Then asphalt concrete (AC) 8 S was designed and produced with the recommended water-foamed binder. Hydrated lime, an additive substantially affecting asphalt concrete mechanical parameters, was used at 0, 15, 30, and 45 wt % as a partial replacement for the limestone filler. The influence of the amount of hydrated lime on the content of voids, indirect tensile stiffness modulus at −10 °C, 0 °C, +10 °C, +20 °C, and +30 °C, and the resistance to permanent deformation was investigated. Statistical analysis of the test results showed the quantity of 30% to be the optimum hydrated lime content. The AC 8 S resistance to permanent deformation was determined at the optimum hydrated lime content. The comprehensive evaluation revealed a synergistic effect between bitumen 50/70, modified before foaming with 0.6 wt % SAA and 30 wt % hydrated lime as the limestone filler replacement, and the half warm mixture AC 8 S, in terms of the standard requirements and durability of the HWMA concrete in pavement applications.

scholarly journals Kinerja Modulus Resilien Campuran Beraspal Panas Asphalt Concrete Binder Course (AC-BC) Yang Mengandung Recycled Concrete Aggregate

2020 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
Galih Wulandari Subagyo
Keyword(s):  
Test Data ◽  
Asphalt Concrete ◽  
Recycled Concrete ◽  
Concrete Aggregate ◽  
Recycled Concrete Aggregate ◽  
Marshall Test

Aktivitas konstruksi membutuhkan material batu maupun  pasir yang tidak sedikit jumlahnya, maka secara langsung aktivitas konstruksi bertentangan dengan konservasi lingkungan yang mempuyai maksud dan tujuan untuk pelestarian ataupun perlindungan alam. Isu-isu  tentang konservasi tersebut merupakan pendorong yang kuat dalam pengembangan teknologi perkerasan aspal untuk memperoleh perkerasan yang awet, murah dan ramah lingkungan termasuk di Indonesia, yang tentunya meminimalisir adanya perusakan alam, salah satunya dengan menggunakan bahan limbah untuk perkerasan jalan yang baru sudah banyak dilakukan. Salah satu bahan limbah yang akan dicoba untuk mengganti agregat baru pada penelitian ini yaitu limbah beton. Variasi limbah beton 0%, 5%, 10%, 15% terhadap total agregat baru. Kemudian dilakukan pengujian terhadap benda uji tersebut dengan metode marshall test (data pengujian tes Marshall, rendaman marshall dan kepadatan mutlak didapatkan dari penelitian terdahulu) sampai dengan uji modulus resilien sehingga didapat hasil karakteristik Marshall berserta hasil dari modulus resilien. Limbah beton yang di gunakan berasal dari beton mutu K-250 (sisa pengujian kuat tekan) telah memenuhi persyaratan sebagai agregat campuran aspal panas berdasarkan Spesifikasi Bina Marga Tahun 2010 Divisi 6 (Revisi 3). Terhadap nilai modulus resilien campuran AC-BC yang mengandung Limbah beton lebih superior dibandingkan dengan tanpa limbah beton di tiga temperatur pengujian 25°C, 35°C, 45°C.

Utilization of Construction and Demolition Debris Under Traffic-Type Loading in Base and Subbase Applications

2000 ◽  
Vol 1714 (1) ◽  
pp. 33-39 ◽  
Author(s):  
Thomas Bennert ◽  
Walter J. Papp ◽  
Ali Maher ◽  
Nenad Gucunski
Keyword(s):  
New Jersey ◽  
Resilient Modulus ◽  
Permanent Deformation ◽  
Recycled Concrete ◽  
Concrete Aggregate ◽  
Recycled Asphalt ◽  
Recycled Materials ◽  
Laboratory Test Results ◽  
Mixed Samples ◽  
Construction And Demolition Debris

As construction and remediation take place throughout New Jersey, the amount of construction and demolition debris increases, while the availability of landfill space decreases. A viable solution for disposing of these materials is to incorporate them into base and subbase applications. An extensive laboratory program was conducted on two types of construction and demolition debris: recycled concrete aggregate (RCA) and recycled asphalt pavement aggregate (RAP). These two materials were compared with dense-graded aggregate base coarse (DGABC), which currently is being used in roadway base applications in New Jersey. Both RCA and RAP were mixed at various percentages with the DGABC to evaluate whether an optimum mix blend could be formulated. The materials were evaluated under a traffic-type loading scheme that included resilient modulus and permanent deformation via cyclic triaxial testing. Laboratory tests indicated that the RAP, RCA, and DGABC blended materials all obtained higher resilient modulus values than the currently used DGABC. The permanent deformation results indicated that the RCA mixed samples obtained the lowest amount of permanent deformation when the material was cyclically loaded to 100,000 cycles. In contrast, the permanent deformation testing on RAP mixed samples resulted in the highest amount of permanent deformation at the same number of cycles. Existing models currently used for quarried base and subbase materials were used to predict the permanent deformation in the recycled materials. Laboratory test results indicated that these models could be used for predicting permanent deformation in unbound recycled materials.

scholarly journals Performance Evaluation of Conventional and High Modulus Asphalt Concrete with Novolac Polymer Modifier Using Aashtoware Software

2018 ◽  
Vol 7 (4.20) ◽  
pp. 386 ◽  
Author(s):  
Basim H. Al-Humeidawi ◽  
Abbas F. Jasim ◽  
Huda A. Kadhim
Keyword(s):  
Asphalt Concrete ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Pavement Performance ◽  
High Modulus ◽  
Construction Costs ◽  
Stiffness Modulus ◽  
Polymer Modifier ◽  
Pavement Thickness ◽  
First Time

In order to changes the original asphalt characteristics, there are many additives have been used to produce or modify the High Modulus Asphalt Binder (HMAB). Even though the hard grade asphalt binder has some disadvantages, such as the aging process due to high mixing and compacting temperature, which can negatively affect the pavement performance, some other advantages include increasing stiffness modulus of asphalt binder and high resistance to permanent deformation. Also, using the hard grade asphalt binder will save construction costs by reducing the asphalt pavement thickness due to its high stiffness modulus. In Iraq, the Novolac modifier and its Cross-linking Agent (Hexamine) was used for the first time as a modifier for asphalt which can significantly improve the rheological properties of asphalt and its role in HMA. This study focuses on estimating the thickness reduction of flexible pavement due to using High Modulus Asphalt Concrete (HMAC). The reduction in permanent deformation and thickness of pavement were estimated for suggested pavement structure sections implemented HMAC mixture compared with the pavement section implemented conventional mixtures using AASHTOWare software version 2.3. The analytical results indicate that adding 4% of Novolac modifier and 15 % of Hexamine (form weigth of Novolac) is reduced the permanent deformation and bottom up cracking by 30% and 46 % compared to conventional mix, respectively. However, it can be concluded that adding Novolac polymer modifier enhanced the pavement performance.  

scholarly journals Behavior of a draining mixture composed by recycled concrete aggregates and rubberized asphalt concrete

Respuestas ◽  
2020 ◽  
Vol 25 (1) ◽  
pp. 96-107
Author(s):  
Juan Gabriel Bastidas-Martínez ◽  
Nicolás Infante Rodríguez-Joaquín ◽  
Hernán Darío Torres-Daza ◽  
Hugo Alexander Rondón-Quintana ◽  
Juan Carlos Ruge-Cárdenas
Keyword(s):  
Asphalt Concrete ◽  
Negative Impact ◽  
Asphalt Mixture ◽  
Control Sample ◽  
Experimental Tests ◽  
Recycled Concrete ◽  
Concrete Aggregate ◽  
Recycled Concrete Aggregates ◽  
Dry Conditions ◽  
Rubberized Asphalt Concrete

Concrete waste is considered an environmental liability with a negative impact. However, this type of waste presents a high potential to be used as an alternative building material. Therefore, the present study aims to evaluate the applicability of substituting the conventional natural stone aggregate (CA) of a draining asphalt mixture (MD) by a recycled concrete aggregate (RCA). Firstly, RCA was physically characterized to be compared with the AC. Then, two MD mixtures were design with rubberized asphalt concrete (GCR by its spanish acronym): one using the conventional aggregate (control sample) and one with the RCA substituting entirely the CA. Experimental tests under monotonic load (indirect tensile strength - RTI) were conducted over the mixtures, as well as  adhesion tests (susceptibility of RTI in wet and dry conditions and abrasion wear Cantabro). The results indicate that for MD mixtures with RCA, a higher content of asphalt is required than with CA. Additionally, it wasfound that the presence of higher asphalt content in MD-RCA mixtures increases its adhesion when compared with the control sample. Therefore, it can be concluded that the use the RCA for MD mixtures, in the proposed way, is technically and environmentally viable.

Sign in / Sign up

Export Citation Format

Share Document