scholarly journals Production And Use Of Reclaimed Asphalt Pavement And Its Performance In A Highway Project By Addidng Anti-Stripping Agent

2019 ◽  
Vol 8 (9) ◽  
pp. 915-918
Keyword(s):  
Asphalt Pavement ◽  
Reclaimed Asphalt Pavement ◽  
Modified Bitumen ◽  
Screening Process ◽  
Reclaimed Asphalt ◽  
Flow Test ◽  
Extraction Test ◽  
The Cost ◽  
Marshall Stability ◽  
Bitumen Extraction

During the maintenance or the construction of asphalt pavement the utilization of reclaimed asphalt pavement (RAP) can diminish the cost of the project, time consumption, conservation of natural resources and most importantly no harm to the environment. In this paper we are going to study the performance of pavement containing RAP (20%, 30%, 40% and 50% excluding the RAP aggregates of size 20 mm), anti-stripping agent Zycotherm, 1% of virgin bitumen contain are replaced by bitumen attached on RAP aggregates after the screening process. Tests performed for conventional and modified pavement sample are Marshall Stability and flow. Test for virgin aggregates and RAP aggregates are impact test, crushing test, shape test, specific gravity and bitumen extraction test. Test for virgin bitumen and modified bitumen are softening and penetration test.

Recycling of Waste Originating Form Flexible Pavements for Bound-Base Courses of Flexible Pavements

2020 ◽  
Vol 46 (3) ◽  
pp. 394-408
Author(s):  
Kumari Monu ◽  
G.D. Ransinchung R.N. ◽  
Surender Singh ◽  
Gaurav Singh Raghav
Keyword(s):  
Asphalt Pavement ◽  
Flexible Pavements ◽  
Rutting Resistance ◽  
Reclaimed Asphalt ◽  
Coarse Aggregates ◽  
Long Run ◽  
Indirect Tensile ◽  
Base Course ◽  
The Cost ◽  
Marshall Stability

Reclaimed Asphalt pavement (RAP) is a C&D waste originating from the reclamation of asphalt pavement which has completed its service life. Using RAP would potentially reduce reliance on primary aggregates and lowers the environmental impact of construction. The present study is an attempt made to utilize RAP judiciously as a bound base course of the flexible pavement. Natural coarse aggregates were replaced by RAP in proportions of 50% & 100% with & without Warm Mix Asphalt (WMA), for production of bound-base course mixes. To ensure the long run performance, the aging condition was simulated in the laboratory and mechanical properties such as Marshall Stability, Tensile Strengths, Marshall Stability Retained, Indirect Tensile Ratio, rutting resistance, Fatigue life, and abrasion resistance were considered. With the incorporation of 50-100% coarse RAP, the Marshall Stability, rutting resistance and abrasion were found to be improved by 30-32%, 43-104% and 11-17% respectively. Similarly, total cost saving is about 15-35%, which is quite significant. However, the addition of WMA enhanced the cost by 3-4%, which is insignificant when combined with RAP, furthermore, the reductions in fume emission enhance the sustainability aspect of the technology.

scholarly journals A REVIEW OF THE USE OF RECLAIMED ASPHALT PAVEMENT FOR ROAD PAVING APPLICATIONS

2020 ◽  
Vol 82 (3) ◽  
Author(s):  
Abdalrhman Milad ◽  
Aizat Mohd Taib ◽  
Abobaker G. F Ahmeda ◽  
Mohmed Solla ◽  
Nur Izzi Md Yusoff
Keyword(s):  
Asphalt Pavement ◽  
Cost Effective ◽  
Asphalt Mixtures ◽  
Waste Materials ◽  
Reclaimed Asphalt Pavement ◽  
Moisture Resistance ◽  
Critical Importance ◽  
Reclaimed Asphalt ◽  
Road Paving ◽  
The Cost

One of the most frequently used waste materials is reclaimed asphalt pavement (RAP). The use of RAP can help reduce the cost of a project and ensure that the project is eco-friendly. Therefore, the aim of this study is to give a detailed description of the production of RAP to ensure that the rehabilitation and maintenance of pavements as well as the construction of pavements are environmentally friendly and cost effective. Previous works have shown the benefits of using RAP with regard to its ability to produce equally good or even superior results compared to the use of virgin or original mixes if they are properly produced and applied. Among the benefits of RAP mixes are good moisture resistance and higher density. This review also demonstrate the critical importance of using RAP in asphalt mixtures.

scholarly journals Experimental study on use of reclaimed asphalt pavement as aggregate substitution for flexible pavement

2018 ◽  
Vol 229 ◽  
pp. 03019
Author(s):  
Elsa Eka Putri ◽  
Purnawan ◽  
M. Agung Triandila ◽  
Agung Pratama ◽  
Rindi
Keyword(s):  
Asphalt Concrete ◽  
Coarse Aggregate ◽  
Asphalt Pavement ◽  
Flexible Pavement ◽  
Rolled Sheet ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt ◽  
Public Work Department ◽  
Marshall Stability ◽  
Hot Rolled

This study is to assess the suitability of Reclaimed Asphalt Pavement (RAP) as a coarse aggregate substitution for flexible pavement mixture. The RAP in this investigation was taken from roads in Padang, Indonesia. There were three types of flexible pavement chosen to be tested for RAP substitution, i.e. Asphalt Concrete-Wearing Course (AC-WC), Asphalt Concrete-Binder Course (AC-BC), and Hot Rolled Sheet-Wearing Course (HRS-WC). Laboratory studies have been carried out on flexible pavement mixes with RAP material and their performance has been compared with flexible pavement without RAP substitution. Marshall tests were carried out in laboratory as per 2010 specification 6th division from Indonesia Public Work Department standard. The effects of RAP on physical and rheological properties of the final bituminous blend were investigated. The research aims to find out the effect of RAP as coarse aggregate substitution to the flexible pavement characteristics, i.e. Stability, Flow, Marshall Quotient (MQ), Void in Mix (VIM) and Void in Mineral Aggregate (VMA). The percentage of RAP substitution is 35%, 55%, and 60%. From the results of the tests in the laboratory, it was concluded that the AC-WC pavement was more appropriate due to, it has achieved the highest Marshall stability, with VIM, VMA, and VFB were in the standard.

scholarly journals Stiffness Data of High-Modulus Asphalt Concretes for Road Pavements: Predictive Modeling by Machine-Learning

Coatings ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 54
Author(s):  
Nicola Baldo ◽  
Matteo Miani ◽  
Fabio Rondinella ◽  
Jan Valentin ◽  
Pavla Vackcová ◽  
...  
Keyword(s):  
Machine Learning ◽  
Performance Metrics ◽  
Bayesian Optimization ◽  
High Modulus ◽  
Modified Bitumen ◽  
Reclaimed Asphalt ◽  
Air Voids ◽  
Definition Of ◽  
The Cost ◽  
Marshall Stability

This paper presents a study about a Machine Learning approach for modeling the stiffness of different high-modulus asphalt concretes (HMAC) prepared in the laboratory with harder paving grades or polymer-modified bitumen which were designed with or without reclaimed asphalt (RA) content. Notably, the mixtures considered in this study are not part of purposeful experimentation in support of modeling, but practical solutions developed in actual mix design processes. Since Machine Learning models require a careful definition of the network hyperparameters, a Bayesian optimization process was used to identify the neural topology, as well as the transfer function, optimal for the type of modeling needed. By employing different performance metrics, it was possible to compare the optimal models obtained by diversifying the type of inputs. Using variables related to the mix composition, namely bitumen content, air voids, maximum and average bulk density, along with a categorical variable that distinguishes the bitumen type and RAP percentages, successful predictions of the Stiffness have been obtained, with a determination coefficient (R2) value equal to 0.9909. Nevertheless, the use of additional input, namely the Marshall stability or quotient, allows the Stiffness prediction to be further improved, with R2 values equal to 0.9938 or 0.9922, respectively. However, the cost and time involved in the Marshall test may not justify such a slight prediction improvement.

Study on the Recycling Method for Drainage Asphalt Pavement and Evaluation for its Durability

2013 ◽  
Vol 723 ◽  
pp. 664-669 ◽  
Author(s):  
Atsushi Kawakami ◽  
Kazuyuki Kubo ◽  
Iwao Sasaki ◽  
Takashi Kano
Keyword(s):  
Asphalt Pavement ◽  
Recycled Aggregate ◽  
Reclaimed Asphalt Pavement ◽  
Modified Bitumen ◽  
Aggregate Gradation ◽  
Reclaimed Asphalt ◽  
Porous Asphalt ◽  
Asphalt Materials ◽  
National Highway ◽  
Polymer Modified Bitumen

In Japan, drainage asphalt pavement (DAP) is widely used especially on the highway and the express way. However, because of the existing porous asphalt materials consist of DAP use polymer modified bitumen, and the aggregate gradation of DAP is differ from conventional mixture, it is difficult to use those porous asphalt materials as the recycled aggregate for reclaimed asphalt pavement. Therefore, the recycling method for recycled DAP which were consisted of recycled porous asphalt materials and virgin aggregates has not been established yet. This paper describes that the recycling method for recycled DAP was considered, and the workability and five years durability was also verified by trial construction of the recycle DAP and new DAP which were consisted of virgin aggregate on the national highway.

scholarly journals Effect of Reclaimed Asphalt Pavement Heating Temperature on the Compactability of Recycled Hot Mix Asphalt

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3621
Author(s):  
Xiang Ma ◽  
Zhen Leng ◽  
Lili Wang ◽  
Peisheng Zhou
Keyword(s):  
Heating Temperature ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Reclaimed Asphalt Pavement ◽  
Modified Bitumen ◽  
Reclaimed Asphalt ◽  
Superpave Gyratory Compactor ◽  
Compaction Curve ◽  
Compaction Energy ◽  
Styrene Butadiene

The compactability of an asphalt mixture is related to the heating temperature of the materials, but the heating temperature of reclaimed asphalt pavement (RAP) is limited by the production process of hot-in-plant recycled mixtures. To choose a reasonable heating temperature for RAP according to the compactability, the compaction energy ratio (CER) obtained from the Superpave gyratory compactor compaction curve was developed. The CERs of fourteen kinds of asphalt mixtures made with different RAPs were compared, all of which were different in type, content, and heating temperature. The results indicated that CER is an effective energy index to evaluate the workability of a bituminous mixture, and it considers both the accumulated energy after each gyration and the number of gyrations. It was also found that increasing the heating temperature of the RAP cannot always improve the workability of the recycled mixture, because the higher heating temperature caused more hard-aged bitumen to be blended with soft virgin bitumen during the mixing process. At the same RAP heating temperature, increasing the RAP content made it more difficult to compact the mixture, especially for RAPs with styrene–butadiene–styrene (SBS) modified bitumen, and the recycled mixtures with SBS-modified bitumen were more difficult to compact than those with nonmodified bitumen.

scholarly journals Use of Plastic Wastes and Reclaimed Asphalt for Sustainable Development

2020 ◽  
Vol 15 (2) ◽  
pp. 182-196
Author(s):  
Umar Hayat ◽  
Abdur Rahim ◽  
Ammad Hassan Khan ◽  
Zia Ur Rehman
Keyword(s):  
Polyethylene Terephthalate ◽  
Asphalt Pavement ◽  
Reclaimed Asphalt Pavement ◽  
Gravimetric Analysis ◽  
Reclaimed Asphalt ◽  
Air Voids ◽  
Plastic Wastes ◽  
The Face ◽  
Modified Binder ◽  
Marshall Stability

The increased cost of virgin material, declining resources and increasing plastic wastes have turned the research momentum towards sustainable and green pavements. Reclaimed Asphalt Pavement (RAP) from the construction industry and plastic wastes disposal is the main problem for Pakistan as well as other developing countries in the face of fewer funds for the construction, repair, and rehabilitation of the extensive road network. In this research, the attempt has been made to study the use of Reclaimed Asphalt Pavement and plastic wastes to counter these issues. Virgin binder was modified with three different contents (2%, 4%, and 6%) of Polyethylene Terephthalate and three contents (20%, 30%, and 40%) of Reclaimed Asphalt Pavement. Conventional properties of the modified binder were determined by penetration and softening point. At the same time, thermal stability was checked by Thermal Gravimetric Analysis, and resistance against rutting was evaluated with the help of Dynamic Shear Rheometer. It is observed that modified binder remains stable up to a temperature of 470 °C and showed improved resistance against rutting. Marshall mix properties were determined and compared to specifications of the National Highway Authority of Pakistan. Optimum Marshall stability was observed with 4% Polyethylene Terephthalate, and 30% Reclaimed Asphalt Pavement, while flow and air voids remained in limits. As per the results, utilisation of plastic wastes in asphalt pavements enhances the performance and helps to reduce the environmental pollution and landfill problems due to Reclaimed Asphalt Pavement and plastic wastes.

scholarly journals Laboratory comparative assessment of warm and hot mixes Asphalt containing reclaimed Asphalt pavement

2020 ◽  
Vol 8 (2) ◽  
pp. 15-26
Author(s):  
Hasan H Joni ◽  
Aqeel Y M Alkhafaji
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Warm Mix Asphalt ◽  
Asphalt Mixtures ◽  
Reclaimed Asphalt Pavement ◽  
Moisture Resistance ◽  
Recycled Asphalt ◽  
Reclaimed Asphalt ◽  
Marshall Stability ◽  
The Impact

Warm mix Asphalt (WMA) could be mixed and used in paving at low temperatures to minimize the consumption of energy and the emissions of greenhouse gas. Recycled Asphalt pavement (RAP) could save Asphaltic cement and aggregate, which could achieve the better effects of recycling. However, both of the two WMA and RAP technologies have some deficiencies. Warm mix Asphalt and Reclaimed Asphalt pavement (WMA-RAP) technique may solve these issues and deficiencies when they are utilized together. This study investigated the implementations of WMA-RAP and its impacts on the performance of the Asphalt mixture. Under the framework of this study, four percentages of RAP (0%, 20%, 30%, and 40%) were added to the hot mix Asphalt (HMA) and WMA containing 4% Sasobit to study the impact of increasing RAP content on Marshall stability and moisture resistance of Asphalt mixtures. In summary, the Marshall stability of HMA and WMA mixtures is higher than the control mixtures. A small decrease in moisture resistance of both (HMA and WMA) containing RAP comparing to control mixtures Asphalt was observed, as shown by reduced the tensile strength ratios (TSR), but it is still much higher than the minimum of 80%.

scholarly journals Investigation the effect of newly used polymer modified bitumen on the performance of hot mix asphalt containing reclaimed asphalt pavement

2021 ◽  
Vol 30 (3) ◽  
pp. 451-463
Author(s):  
Osamah Chafat ◽  
Sahar Al-Ghurab ◽  
Basim Al-Humeidawi
Keyword(s):  
Hot Mix Asphalt ◽  
Phenol Formaldehyde ◽  
Asphalt Pavement ◽  
Reclaimed Asphalt Pavement ◽  
Modified Bitumen ◽  
Reclaimed Asphalt ◽  
Indirect Tensile ◽  
And Performance ◽  
First Time ◽  
Polymer Modified Bitumen

The current research focuses on investigating the effect of using reclaimed asphalt pavement (RAP) on performance of hot mix asphalt (HMA) prepared with polymer modified bitumen (PMB) binder. This PMB used for the first time with HMA contained RAP. The mechanical properties and performance of HMA were assessed using several standard tests including Marshall, indirect tensile strength, creep compliance, and wheel track test. The RAP replacement was conducted up to 70% of total aggregate in HMA with an increment of 10%. The results of investigation showed, that the use of PMB binder prepared by addition novolac (phenol formaldehyde solid resin) and hexamine to conventional bitumen, significantly improved the performance of HMA contained RAP. Also, the optimum percentage of RAP replacement was found to be 50% of total aggregate in HMA. For this level of replacement, the rut depth reduced up to 38% of its original value.

scholarly journals Mixture Composition Analysis Of Reclaimed Asphalt Pavement (RAP) As Asphalt Concrete – Wiring Course (AC-WC) Layer Against Marshall Characteristic

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Wahyu Aunur Rahman Hakim
Keyword(s):  
Asphalt Concrete ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Mixture Composition ◽  
Composition Analysis ◽  
Reclaimed Asphalt Pavement ◽  
Road Maintenance ◽  
Reclaimed Asphalt ◽  
Natural Aggregate ◽  
Marshall Stability

Reclaimed Asphalt Pavement of national roads in East Java Province can be used at AC-WC, AC-BC, AC-Base layers, with a percentage of RAP usage of 20-40%, optimum RAP of 20-30%, asphalt’s content in RAP of 3,78-4.63% (Widayanti, 2018). The composition of the addition for 20% RAP which is originated by Taman-Waru with natural aggregates produces Marshall stability of 830.482 kg and melting / flow of 3.8 mm (Handayani, 2007). Therefore, it is necessary to have research of the analysis about the composition of the Reclaimed Asphalt Pavement (RAP) in the amount of 25%, 30%, 35% as the Asphalt Concrete - Wiring Course (AC-WC) layer against the characteristics of the Marshall. The purpose of this research are 1.) To find out the optimum asphalt content (KAO) in a mixture of AC-WC (Asphalt Concrete - Wearing Course) asphalt and 60/70 Asphalt mixture with the usage of RAP material and natural aggregate in accordance with the General Specifications of Bina Marga 2018 2.) Knowing the effect of the usage of RAP material and natural aggregate for the   gradation of asphalt mixture of AC-WC (Asphalt Concrete - Wearing Course) in accordance with the General Specifications of Bina Marga 2018 3.) Knowing the performance of AC-WC asphalt concrete mixture (Asphalt Concrete - Wearing Course) and 60/70 asphalt mixture of RAP material and natural aggregate in terms of Stability and Marshall Quotient values. The research was carried out by the experimental method through laboratory testing. The expected benefit of this research is the discovery for optimizing of the usage recycle materials from road pavement that will be reused during the implementation of road maintenance work and give an alternative of the minimum natural aggregate’s usage. The result of the testing in the laboratory, the mixture of heat asphalt AC-WC with 25% of RAP, had the highest Marshall stability of characteristic for 1309 kg. It’s caused the new materials of the mixture composition has better quality than the mixture of   RAP materials, but the additions of RAP composition for 25%, 30%, 35% still can be used as the alternative substitution of nature aggregate, because those are still the Bina Marga’s specification in 2018 of AC-WC mixture.

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