Sustainability assessment for portland cement concrete pavement containing reclaimed asphalt pavement aggregates

Shi, Xijun; Mukhopadhyay, Anol; Zollinger, Dan G

doi:10.1016/j.jclepro.2018.05.004

Cited by 116 publications

(34 citation statements)

References 21 publications

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“…This problem not only affects the lifetime of the road itself but also increases the danger of the driving vehicle [3,4]. In order to solve this problem, the concept of anti-sliding (AS) layer was proposed, in which a polymer layer is introduced to protect the surface of the road without changing original pavement structure [5,6]. So far, asphalt is the main material used for road maintenance [7].…”

Section: Introductionmentioning

confidence: 99%

Laboratory evaluation on water-based and flexible epoxy/SiO<sub>2</sub> nanocomposites to enhance anti-sliding effectiveness of pavement

Sun

Liang

Ding

et al. 2020

Mater. Res. Express

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The anti-slip (AS) layer of the cement concrete pavement (CCP) can probability decrease traffic accidents and extend the service life of the road. Epoxy resin has excellent adhesion and mechanical strength, making it possible in this field. Herein, a flexible waterborne epoxy resin (WER) without a small molecule emulsifier was synthesized by bisphenol A epoxy resin, poly (propylene glycol) diglycidyl ether (PDE), diethylenetriamine (DETA). The mechanism of the group reaction was characterized by fourier transform infrared (FTIR), and dynamic scanning calorimetry (DSC) determined the heat of curing of WER. Then, the physical properties of WER were enhanced by the silane coupling agent modified nano-silica (SCA-NS) and the composite's water absorption rate and mechanical propriety were evaluated. Finally, the pavement performance of the AS layer was prepared and tested as well as compared with the commercial waterborne epoxy resin (CWER) and emulsified asphalt (EA). The result shows EA has low durability and adhesion strength than epoxy resin. The small molecule emulsifier and low-flexible resistance of CWER decrease water stability and antisliding durability of the AS layer. Due to applied nanomaterial reinforced and without small molecule emulsifiers, the WER base AS layer shows extremely high adhesion strength, water stability, and skidresistance durability at addition 3 wt% of SCA-NS, which have a great potential for CCP.

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Section: Introductionmentioning

confidence: 99%

Laboratory evaluation on water-based and flexible epoxy/SiO<sub>2</sub> nanocomposites to enhance anti-sliding effectiveness of pavement

Sun

Liang

Ding

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…Moreover, two-lift concrete pavements have been successfully constructed in the USA with the bottom layer containing low-quality recycled aggregate concrete [19][20][21]. It was pointed out by Shi et al [22] that two-lift construction using recycled materials in the bottom lift can have the highest positive impacts from a social and environmental perspective.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Types of Recycled Concrete Aggregates on Equivalent Concrete Strength and Drying Shrinkage Properties

Yang¹

2018

Applied Sciences

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Residual mortar attached to recycled concrete aggregate (RCA) always leads to a decrease in Young’s modulus and an increase in the drying shrinkage of RCA concrete, mainly due to an increase of total mortar volume. To overcome this inherent problem, the modified and equivalent mortar volume (EMV) methods were proposed by researchers. Despite the comparable test results, both models are still subject to the slump loss problem. Thus, under the same W/C (water to cement ratio) ratio and slump condition, this study assessed the influence of the modified EMV mix method on RCA concrete properties. A total of six mixes were proportioned using the modified EMV method with three different RCAs. Test results show that the concrete mixed with RCA produced from old PC concrete sleepers exhibited compressive strength, Young’s modulus, and flexural strength values within 2% variation, equivalent to those values of the companion natural aggregate concrete. In other mixes, compressive strength was found to decrease to 11–20%. It was observed that for 100% replacement of RCA mix, Young’s modulus increased to 10% and drying shrinkage increased to 8% only, while for 50% replacement of RCA mix, Young’s modulus decreased to 8% and drying shrinkage dropped to 4%.

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“…Another factor affecting final aggregate cost is related to energy consumption for quarrying and subsequent manufacturing. In addition, costs related to transportation of raw materials for long distance have to be considered as well [7,8]. Different waste materials were tested to partially and/or full replacement of natural aggregates [9,10].…”

Section: Introductionmentioning

confidence: 99%

The Design and Material Characterization of Reclaimed Asphalt Pavement Enriched Concrete for Construction Purposes

2020

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Reclaimed asphalt pavement (RAP) is a valuable commodity originating during processes of road/highways rehabilitations, resurfacing in the cases of the revelation of underneath-placed layers. Removed material can be successfully recycled and utilized as a supplementing material for new hot asphalt mixes. However, its dosages are limited because of variations in properties of aged bitumen compared to fresh material and, thus, a significant amount of waste material is remaining as waste products. Nonetheless, this commodity may find usage in the construction industry that suffers from a shortage of high-quality and easily available aggregates. This work aimed to investigate the optimal substitution of mined natural aggregate with commonly available RAP in order to produce composites with the comparable mechanical performance of reference ordinary Portland concrete. The aggregate substitutions up to 100% with RAP have been studied with a combination of mechanical and analytical techniques. Obtained experimental data showed changes in the porous structure, mineralogy, and in the amount of formed cement-related hydration products that influenced the mechanical performance of produced composites. Composite with 10% of natural aggregate substitution with RAP has shown the strength class C16/20 after 28 days of water curing, according to the EN 206-1. Such innovative products could be utilized in the construction industry. The usage of waste RAP could contribute to preservation of our environment for future generations.

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Sustainability assessment for portland cement concrete pavement containing reclaimed asphalt pavement aggregates

Cited by 116 publications

References 21 publications

Laboratory evaluation on water-based and flexible epoxy/SiO<sub>2</sub> nanocomposites to enhance anti-sliding effectiveness of pavement

Laboratory evaluation on water-based and flexible epoxy/SiO<sub>2</sub> nanocomposites to enhance anti-sliding effectiveness of pavement

Effect of Different Types of Recycled Concrete Aggregates on Equivalent Concrete Strength and Drying Shrinkage Properties

The Design and Material Characterization of Reclaimed Asphalt Pavement Enriched Concrete for Construction Purposes

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