Design and properties of high reclaimed asphalt pavement with RH-WMA

10th Malaysian Road Conference & Exhibition 2018

工业技术（总论）

Gungat, L.^1 ; Hamzah, M.O.^2 ; Yusoff, N.I.M.^3 ; Goh, S.W.^4

Civil Engineering Program, Faculty of Engineering, Universiti Malaysia Sabah, Kota Kinabalu, Sabah, Malaysia^1

School of Civil Engineering, Universiti Sains Malaysia, Engineering Campus, Pulau Pinang, Malaysia^2

Dept. of Civil and Structural Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia^3

Universal Pave Sdn. Bhd., Pulau Pinang, Malaysia^4

关键词: Alternative materials;    Bulk production;    Compaction temperature;    Economic and environmental benefits;    Reclaimed asphalt pavements;    Reduced production;    Response surface method;    Warm mix asphalt (WMA);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/512/1/012055/pdf
DOI  :  10.1088/1757-899X/512/1/012055

学科分类：工业工程学

来源: IOP

【 摘 要 】

Economic and environmental benefits gain from the recycling of old pavement promotes the use of reclaimed asphalt pavement (RAP) in the road construction and rehabilitation. However, high production temperature due to RAP stiffness becomes the main concern in the production of RAP. Reduced production temperature with the addition of warm mix asphalt (WMA) may compensate for aging of RAP binder, nevertheless the stiffness of RAP binder is depending on how much it ages and needs localised investigation for a bulk production of RAP. This research investigates the mix design and properties of high RAP content incorporating a WMA additive for a bulk RAP production in Malaysia. Milled RAP obtained from local roads were incorporated with a WMA named RH-WMA. Prior to addition of RAP into mixtures, the milled RAP were processed and characterized as a quality control of RAP from various sources. Mix design of mixture that contains RAP and 3% RH-WMA were performed using the Response Surface Method. Subsequently, the specimens were evaluated for its chemical and mechanical properties. The analysis on mix design showed that compaction temperature and bitumen content were significant factors. Reasonable reduction of optimum binder content and energy consumption were observed with the additions of RH-WMA. Tests on mechanical properties demonstrate increased on stiffness with the addition of RAP and hence reduced the fatigue resistance. However, the addition of RH-WMA on specimens that subjected to combined effects of moisture and aging showed improvement on fatigue resistance. Hence, with proper quality control of RAP material, the incorporation of RH-WMA into RAP indicated potential as an alternative material for green road construction.