Long-term effects of RAP on the mechanical properties of cold recycled mixtures

Xie, Yichang; Liu, Guoqiang; Pan, Yuanyuan; Zhong, Chen

doi:10.1080/10298436.2021.1985117

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…Traditionally, the aged asphalt was ignored, and RAP materials could be considered as "black rock," which acted as skeleton in the mixture. However, although the CRME did not undergo the hot regeneration process, the new and aged asphalt would still be blended to a certain extent [27][28][29]. It was possible that the aged asphalt should not be ignored, and it is an important factor for evaluating the performance of RAP materials [27].…”

Section: Raw Materialsmentioning

confidence: 99%

Microstructure in Adhesion Development Process and Strength Formation Mechanism in Early Stage of Cold Recycled Mixture with Emulsified Asphalt

Zhao,

2024

Advances in Civil Engineering

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With the large-scale maintenance and renovation of asphalt pavement, a considerable amount of reclaimed asphalt pavement (RAP) will be generated. Stacking these wastes occupies a large amount of land and seriously damages the ecological environment. Hence, efficient regeneration of RAP through recycling technology has gained more and more attention. In this paper, some topics were reviewed to further promote the cold recycling (CR) technology and better follow-up the research progress. First, it discussed the raw materials and the differences and similarities between cement-emulsified asphalt mortar (CEAM) and cold-recycled mixtures with emulsified asphalt (CRME). Second, it reviewed the adhesion development of emulsified asphalt mastic, the application of X-ray technology in microscopic study of CRME and the characteristic of strength development of CRME. The adhesion development of CRME begins with the process of demulsification and hydration caused by the migration and dissipation of water inside the emulsified asphalt mastic. In addition, many factors would influence this process simultaneously. However, the microbehavior mechanism of internal water transport in emulsified asphalt mortar has not yet been thoroughly revealed, and it lacked scientific measurement research on the promoting effect of complex conditions on the development of adhesive properties of mixtures. Therefore, in this paper, they were suggested for future research.

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Section: Raw Materialsmentioning

confidence: 99%

Microstructure in Adhesion Development Process and Strength Formation Mechanism in Early Stage of Cold Recycled Mixture with Emulsified Asphalt

Zhao,

2024

Advances in Civil Engineering

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“…One of the most cost-effective and environmental-friendly modes of employment of RA is represented by cold-recycling, in which RA is combined with asphalt emulsion or foamed bitumen to create a stable and durable paving mixture [ 15 ]. Although cold-recycling techniques have traditionally been used in low-volume roads due to the poorer mechanical properties of corresponding mixtures [ 8 , 16 , 17 , 18 , 19 , 20 ], promising research has been reported in which cold-recycled asphalt mixtures exhibited performance in the field comparable to that of standard bituminous layers containing exclusively virgin materials [ 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

A Sustainable Cold-Recycled Solution for the Surface Finishing of Unpaved Rural Roads

et al. 2022

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This paper presents the results of an experimental investigation which was carried out with the purpose of assessing the performance-related properties of an emulsion-based cold-recycled mixture to be employed as a sustainable solution for the surface finishing of unpaved rural roads. This mixture contained significant quantities of recycled components (reclaimed asphalt and mineral sludge), and its composition was fine-tuned by following an innovative mix design procedure. Properties of these mixtures were studied by means of laboratory tests which considered key parameters, such as flowability, indirect tensile stiffness modulus, indirect tensile strength, moisture susceptibility and resistance to permanent deformation. It was found that, by means of the proposed mix design procedure, optimal dosages of the recycled components can be identified, thereby ensuring the achievement of the desired properties in terms of high workability and adequate stiffness and strength.

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Research on long-term strength formation and performance evolution with curing in cold recycled asphalt mixture

Han

Liu

Zhao

2023

Case Studies in Construction Materials

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Long-term effects of RAP on the mechanical properties of cold recycled mixtures

Cited by 3 publications

References 20 publications

Microstructure in Adhesion Development Process and Strength Formation Mechanism in Early Stage of Cold Recycled Mixture with Emulsified Asphalt

Microstructure in Adhesion Development Process and Strength Formation Mechanism in Early Stage of Cold Recycled Mixture with Emulsified Asphalt

A Sustainable Cold-Recycled Solution for the Surface Finishing of Unpaved Rural Roads

Research on long-term strength formation and performance evolution with curing in cold recycled asphalt mixture

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