scholarly journals Mix Design of Emulsion Treated Reclaimed Asphalt Pavement and Its Implementation at Field

2021 ◽  
Vol 9 (12) ◽  
pp. 2372-2423
Author(s):  
Arun Kumar Jat
Keyword(s):  
Asphalt Pavement ◽  
Construction Materials ◽  
Point Of View ◽  
Dry Density ◽  
Reclaimed Asphalt Pavement ◽  
Maximum Dry Density ◽  
High Quality ◽  
Reclaimed Asphalt ◽  
The World ◽  
Quality Material

Abstract: Reclaimed asphalt pavement (RAP) is a valuable, high quality material that can be replace over expensive virgin aggregates and binder that can be used for technical, economical and environmental reasons. Use of RAP can be favored all over the world over virgin material on the light of increasing cost of bitumen, the scarcity of high quality aggregates and the pressing need to preserve the environment. Overlay and maintenance resolve medium distress, but reconstruction may feasible and economical while Asphalt pavement are badly deteriorated with time and traffic. This requires the removal of existing pavement surfaces. Recycling such construction waste has benefited from economic to sustainability point of view and reduce the exploitation of natural resources. The shortage of virgin aggregate supplies along with the increase in processing and hauling cost have encouraged the use of reclaimed material from the old structure as base course construction materials and involved in regular practice in various countries around the world. Keywords: RAP1-Reclaimed Asphalt Pavement, DBM2-Dense Bitumenous Macadam,ITS3- Indirect Tensile Strength,MDD4- Maximum Dry Density,OMC5-Optimum Moisture Content, HMA6-Hot Mix Asphalt, UCS7-Unconfined Compressive Strength, CIPR8-Cold In Place Recycling.

scholarly journals COMPACTION ASSESSMENT OF RECYCLED AGGREGATES FOR USE IN UNBOUND SUBBASE APPLICATION

2014 ◽  
Vol 20 (2) ◽  
pp. 169-174 ◽  
Author(s):  
Vahid Ayan ◽  
Mukesh C. Limbachiya ◽  
Joshua R. Omer ◽  
Seyyed Masoud Nasr Azadani
Keyword(s):  
Moisture Content ◽  
Asphalt Pavement ◽  
Optimum Moisture Content ◽  
Recycled Concrete ◽  
Recycled Aggregates ◽  
Dry Density ◽  
Reclaimed Asphalt Pavement ◽  
Maximum Dry Density ◽  
Reclaimed Asphalt ◽  
Natural Aggregates

Study was recently conducted at Kingston University to assess the suitability of using recycled concrete aggregate (RCA) and reclaimed asphalt pavement (RAP) in unbound subbase mixtures. The results showed that the use of 100% recycled aggregates increased the optimum moisture content and decreased the maximum dry density of the sub-base materials in comparison with natural aggregates. Moreover, the replacement of RCA by reclaimed asphalt pavement by 50% decreased the optimum moisture content and increased the maximum dry density in proportion to 100% RCA. The effects of physical properties on 0% air void and compaction curve were discussed for each type of subbase. The CBR values of the subbase materials prepared with 100%RCA is lower than subbase mixture with 100% natural aggregates. The CBR further decreased for replaced subbase with RAP so that 50%RCA + 50%RAP is not suitable for unbound subbase from the point of CBR view. In each mix the trend of CBR value was investigated in terms of water content. This research found some significant practical points to use in site works.

scholarly journals Compressive strength of cement stabilizations containing recycled and waste materials

2021 ◽  
Vol 73 (08) ◽  
pp. 791-804
Keyword(s):  
Compressive Strength ◽  
Asphalt Pavement ◽  
Dry Density ◽  
Reclaimed Asphalt Pavement ◽  
Maximum Dry Density ◽  
Reclaimed Asphalt ◽  
Optimal Moisture Content ◽  
Proctor Test ◽  
Pavement Structures ◽  
Full Factorial

This study analyses the possibilities of using up to 30% of reclaimed asphalt pavement as a substitute material for natural aggregate, along with fly ash replacing 20% or 40% of Portland cement in cement stabilizations with 4% and 6% of binder. The Proctor test was used to determine maximum dry density and optimal moisture content of cement-based stabilizations. The compressive strength was tested after 7, 28, and 90 days. Parameters influencing 28-day compressive strength were evaluated by full factorial design and by classification in strength classes. The results obtained justify the utilisation of waste and recycled materials in pavement structures.

scholarly journals Utilization of Reclaimed Asphalt Pavement Material in Wet Mix Macadam (W.M.M)

2021 ◽  
Vol 2089 (1) ◽  
pp. 012060
Author(s):  
Ajaykumar Sejvani ◽  
A.A. Amin ◽  
L.B. Zala
Keyword(s):  
Asphalt Pavement ◽  
Construction Material ◽  
Economic Benefits ◽  
Dry Density ◽  
Reclaimed Asphalt Pavement ◽  
Maximum Dry Density ◽  
Reclaimed Asphalt ◽  
Pavement Materials ◽  
Proctor Test ◽  
Pavement Material

Abstract Reclaimed asphalt pavement (RAP) is one of the innovative and effective technologies in many places in the world. The utilization of RAP is rapidly increasing popularity and becoming an emerging technique in India. As per IRC-120:2015, removing or reprocessing pavement materials containing aggregates that are bitumen coated is termed as RAP. These materials are gained through a process in which the existing surface pavement is reclaimed and reused after processing for reconstruction, resurfacing, or repaving. Well graded and high-quality aggregate are achieved from this process. Proper utilization of RAP with specified properties and specified percentages, not only serve as an alternative useful pavement material but also helps in reducing the usage of natural construction material, that will directly reduce the overall cost of projects. By conducting tests as per MoRTH specifications (5th Revision), the various characteristics of RAP material and fresh aggregates are observed. The main objective of the study is to carry out the performance tests: Modified Proctor test on fresh material as well as on material mixed with reclaimed asphalt pavement i.e. 10%, 20%, and 30% of total mix and to achieve optimum moisture content and maximum dry density by using Modified Proctor Test. Attempts are carried out to design a new pavement using Indian Road Congress (I.R.C-37:2018) guidelines and utilization of RAP material. Economic benefits are calculated in terms of fresh and RAP (10%, 20%, and 30%) mix material pavement.

scholarly journals Evaluation of Waste Engine Oil-Rejuvenated Asphalt Concrete Mixtures with High RAP Content

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
A. A. Mamun ◽  
H. I. Al-Abdul Wahhab
Keyword(s):  
Resilient Modulus ◽  
Asphalt Pavement ◽  
Construction Materials ◽  
Road Construction ◽  
Engine Oil ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt ◽  
Waste Engine Oil ◽  
Increasing Demand ◽  
Aged Binder

The use of large proportions of reclaimed asphalt pavement is necessary to meet the increasing demand for road construction materials in a sustainable way. One of the challenges of using a greater percentage of reclaimed asphalt pavement (>30%) is the greater stiffness of mixes incorporating it. While this stiffness problem is usually resolved by using different commercial rejuvenators, there are circumstances in which commercial rejuvenators are not available. Therefore, this study evaluates the potential of using waste engine oil as a substitute for commercial rejuvenators for the higher percentage of reclaimed asphalt pavement that could meet the increasing demand in a more sustainable way. To assess the possibility of using a higher percentage of reclaimed asphalt pavement in road construction, different percentages of reclaimed asphalt pavement (30%, 40%, and 50%) are used. Following the property of the aged binder, three different percentages (7%, 13%, and 20%) of waste engine oil are considered. Each percent of waste engine oil is incorporated with one of the three mixes. The mixes (with the minimum required Marshall criteria) are evaluated for different properties, namely, their indirect tensile strength, resilient modulus, and durability. Finally, those properties are compared to those of the mixes rejuvenated by commercial rejuvenators. It is observed that, for the aforementioned properties, 7% to 13% of waste engine oil is identical to the commercial rejuvenator for the mixes with 30% to 40% of reclaimed asphalt pavement.

Evaluation of Cement Kiln Dust-Stabilized Reclaimed Asphalt Pavement Aggregate Systems in Road Bases

2003 ◽  
Vol 1819 (1) ◽  
pp. 11-17 ◽  
Author(s):  
Ramzi Taha
Keyword(s):  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Asphalt Pavement ◽  
Cement Kiln Dust ◽  
Cement Kiln ◽  
Dry Density ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt ◽  
Kiln Dust ◽  
Road Bases

Road rehabilitation and reconstruction generate large supplies of reclaimed asphalt pavement (RAP) aggregate, and recycling into asphalt paving mixtures is the predominant application. Cement kiln dust (CKD), also known as cement bypass dust, is a by-product material generated during production of portland cement. In Oman, where recycling of pavement materials is not practiced, a first attempt was made at combining two by-product materials for use in road construction. Conservation of natural resources and preservation of the environment are two benefits that could be gained by reusing waste materials. The potential use in road bases of CKD-stabilized RAP and RAP with virgin aggregate mixtures was investigated. Physical, compaction, and unconfined compressive strength tests were conducted on RAP and virgin aggregate blends of 100% to 0%, 90% to 10%, 80% to 20%, and 0% to 100%. Samples were prepared using CKD at 0%, 3%, 5%, 7%, 10%, 15%, and 20% and were cured for 3, 7, and 28 days in plastic bags at room temperature. Results indicate that the maximum dry density and unconfined compressive strength of RAP generally increase with addition of virgin aggregate and CKD. The moisture content-dry density curves for CKD-stabilized RAP aggregate mixtures did not show a distinctive peak similar to that of the 100% virgin aggregate blend. Longer curing periods will produce higher strength values. CKD content of 15% seems to be the optimum for achieving maximum strength.

Research and Application of Warm Recycled Asphalt Mixture

2012 ◽  
Vol 446-449 ◽  
pp. 2412-2417
Author(s):  
Li Ying Yang ◽  
Yi Qiu Tan ◽  
Hao Liu ◽  
En Guang Li
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Laboratory Research ◽  
Reclaimed Asphalt Pavement ◽  
Recycled Asphalt ◽  
Environment Friendly ◽  
Reclaimed Asphalt ◽  
The World ◽  
Effective Use ◽  
Near Future

Reclaimed asphalt pavement (RAP) develops rapidly throughout the world. Hot recycling is one way to make effective use of the waste, but the percentage of RAP in hot recycling is no more than 30%. By way of warm asphalt technology, the percentage of RAP can increase greatly. In this paper, warm recycling is researched. The RAP and the virgin materials including aggregates and asphalt are tested and analyzed. Then, two warm recycling mixtures with different amount of RAP are designed and their properties are investigated. As a comparison, the performances of hot recycling are also tested. At last, the performances of warm recycling and hot recycling are compared and discussed. After the laboratory research, the warm recycling made its debut in Beijing and it exhibit very well, which testifies that warm recycling owns good properties. Warm recycling can make use of pavement waste, and it can decrease the emission and energy consumption. Warm mix is environment-friendly and it is promising in the near future.

scholarly journals Double-Recycled Reclaimed Asphalt Pavement: A Laboratory Investigation at Low Temperatures Based on Different Mathematical Approaches

Materials ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3032
Author(s):  
Ki Hoon Moon ◽  
Augusto Cannone Falchetto
Keyword(s):  
Low Temperature ◽  
Construction Industry ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Construction Materials ◽  
Temperature Response ◽  
Material Behavior ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt ◽  
The Road

Using recyclable materials in asphalt pavement is a fundamental design approach not only for limiting the environmental impact of the construction industry, but also for reducing the overall costs of the road infrastructures. Over the past years, road agencies have developed different policies to incorporate various types of recyclable material into conventional asphalt mixtures. reclaimed asphalt pavement (RAP) is one of the most highly recycled construction materials. However, the aged RAP binder and its stiffer and brittle characteristics compared to the fresh binder may negatively affect the performance of the recycled mixture, especially when operating in cold climates. In this study, the low-temperature response of asphalt mixture prepared with single-recycled RAP (SRRAP) and double-recycled RAP (DRRAP), prepared in the laboratory, is experimentally investigated based on creep testing performed with the bending beam rheometer (BBR). Then, the data were analyzed based on three simple mathematical models to extract information on material behavior. Finally, a new indicator named thermal stress factor (TFS) on low-temperature response is proposed. Relatively poorer performance was observed from SRRAP mixture compared to the asphalt mixture prepared with virgin material. However, the low-temperature response between SRRAP and DRRAP did not present significant differences. The values of TFS support the experimental results and suggest the possibility of considering re-recycling technology for further research with the objective of a possible application in the asphalt pavement industry.

scholarly journals Recycling of Reclaimed Asphalt Pavement in Portland Cement Concrete

2009 ◽  
Vol 6 (1) ◽  
pp. 37 ◽  
Author(s):  
Salim Al-Oraimi ◽  
Hossam F. Hassan ◽  
Abdulwahid Hago
Keyword(s):  
Asphalt Concrete ◽  
Coarse Aggregate ◽  
Asphalt Pavement ◽  
Coarse Fraction ◽  
Reclaimed Asphalt Pavement ◽  
Portland Cement Concrete ◽  
Surface Absorption ◽  
High Quality ◽  
Reclaimed Asphalt ◽  
Asphalt Cement

Reclaimed Asphalt Pavement (RAP) is the result of removing old asphalt pavement material. RAP consists of high quality well-graded aggregate coated with asphalt cement. The removal of asphalt concrete is done for reconstruction purposes, resurfacing, or to obtain access to buried utilities. The disposal of RAP represents a large loss of valuable source of high quality aggregate. This research investigates the properties of concrete utilizing recycled reclaimed asphalt pavement (RAP). Two control mixes with normal aggregate were designed with water cement ratios of 0.45 and 0.5. The control mixes resulted in compressive strengths of 50 and 33 MPa after 28 days of curing. The coarse fraction of RAP was used to replace the coarse aggregate with 25, 50, 75, and 100% for both mixtures. In addition to the control mix (0%), the mixes containing RAP were evaluated for slump, compressive strength, flexural strength, and modulus of elasticity. Durability was evaluated using surface absorption test. 

scholarly journals A Review on Bitumen Aging and Rejuvenation Chemistry: Processes, Materials and Analyses

2021 ◽  
Vol 13 (12) ◽  
pp. 6523
Author(s):  
Emiliano Prosperi ◽  
Edoardo Bocci
Keyword(s):  
Low Temperature ◽  
Hot Mix Asphalt ◽  
Scientific Literature ◽  
State Of The Art ◽  
Asphalt Pavement ◽  
The State ◽  
Point Of View ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt

During the last decades, extensive research has been carried out on using reclaimed asphalt pavement (RAP) material in the production of hot recycled mix asphalt. Unfortunately, the aged, stiff, and brittle binder in the RAP typically increases the mixture stiffness and can therefore cause fatigue and low-temperature damages. In the scientific literature, there are many studies concerning the aging and rejuvenation of bitumen, but there is a lack of up-to-date reviews that bring them together, especially those facing the phenomena from a chemical point of view. In this paper, a recap of the chemical aspects of virgin, aged, and rejuvenated bitumen is proposed in order to provide a useful summary of the state of the art, with the aim of both encouraging the use of an increasing quantity of RAP in hot mix asphalt and trying to give indications for further research.

Sign in / Sign up

Export Citation Format

Share Document