Microstructure of synthetic composite interfaces and verification of mixing order in cold-recycled asphalt emulsion mixture

Chen, Tian; Ma, Tao; Huang, Xiaoming; Ma, Shengqiang; Tang, Fanlong; Wu, Shaopeng

doi:10.1016/j.jclepro.2020.121467

Cited by 112 publications

(19 citation statements)

References 41 publications

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“…The aggregate gradation of EAC is shown in Figure 2 . Based on the Marshall mixture design procedure [ 35 , 36 , 37 , 38 ], the optimum asphalt-aggregate ratio for CHES EAC, KD-BEP EAC, V-type EAC, and cold mix EAC are 8.3%, 6.5%, 6.5%, and 8.5%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Development and Laboratory Evaluation of a Cold Mix High-Early-Strength Epoxy Asphalt Concrete for Steel Bridge Deck Pavements

et al. 2021

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Epoxy asphalt concrete (EAC) is a widely used steel bridge deck pavement (SBDP) material. Due to the curing reaction, the EAC-based material needs a long curing period before opening to traffic, which in an inconvenience in the construction of SBDP. This study developed a cold mix high-early-strength (CHES) epoxy asphalt through the design of a compatilizer and curing agent system. The optimum formula of CHES epoxy asphalt was determined through a series of laboratory tests. By comparison of the performances of CHES EAC and some conventional EACs for SBDP, it was found that the developed CHES epoxy asphalt can significantly reduce the curing period, and the pavement performance of CHES EAC is, overall, excellent for application in SBDP. In addition, the sufficient allowable construction duration shows that the CHES EAC has a good construction workability.

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Section: Resultsmentioning

confidence: 99%

Development and Laboratory Evaluation of a Cold Mix High-Early-Strength Epoxy Asphalt Concrete for Steel Bridge Deck Pavements

et al. 2021

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“…In the future, it would be necessary to consider in more detail the features of the formation of the microstructure of such modified mixtures, depending on the conditions of homogenization of their components. The results of recent research by a number of scientists indicate that there are serious prospects for improving the physical and mechanical properties of composites taking into account a directional regulation of their preparation modes [37,38]. Composites prepared on cold reclaimed mixes modified with styrene-acryl behave quite differently at high temperatures.…”

Section: Discussion Of the Main Research Resultsmentioning

confidence: 99%

Fatigue resistance of modified cold reclaimed mixes with 100% content of recycled asphalt pavement (RAP)

Zankavich¹,

Khroustalev

Veranko³

et al. 2020

SN Appl. Sci.

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This study is devoted to finding a solution to an important problem of increasing the accuracy of assessing the fatigue stability of composites based on recycled asphalt concrete. Another problem for solving was a selecting optimal and effective ways to improve their physical-mechanical properties during modification by polymers. For experimental work, a new indicator reflecting the strength of elastic structural bonds and the specific number of viscoplastic bonds was used as a criterion for fatigue stability of bituminous-cement composites. As shown by the results of the research, fatigue (cyclic) stability has an increasing trend with the growth of these parameters. As a result of processing data from experimental studies of the structural characteristics of composites, a comparative analysis of the effectiveness of modification of cold recycled mixes by styrene acrylate and epoxy resin was performed. It was established that the composites modified with styrene acrylates have a higher relaxation ability, which is reflected in the increase in the number of cycles to failure when testing for cyclic stability. It is also noted that with an increase in the content of epoxy resin in the composition of mixes, the increase in stiffness occurs much more strongly in comparison with an increase in their relaxation ability. At the same time, the efficiency of modification of cold recycled mixes with epoxy resins is significantly increased with the preliminary preparation of asphalt granulate (RAP), for example, during its plasticization with soy epoxidized oil. This work also allowed us to outline some areas of development of the methodological foundations for assessing the cyclic and fatigue stability of composites based on cold recycled mixes. Keywords Fatigue resistance • Recycled asphalt pavement (RAP) • Modified cold reclaimed mixes • Styrene-acrylic water dispersion • Water dispersion of epoxy resin • Epoxidized soybean oil * Vitali Zankavich,

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“…Not only does the type of waste [ 36 , 37 ] used have an impact on the properties of road mixes, but the order and method of mixing and the conditions for mixing and compacting these components also have an impact on the obtained values of mechanical parameters, such as intermediate tensile strength or dynamic modules [ 38 , 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Research on the Properties of Mineral–Cement Emulsion Mixtures Using Recycled Road Pavement Materials

2021

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The reduction in natural resources and aspects of environmental protection necessitate alternative uses of waste materials in the area of construction. Recycling is also observed in road construction where mineral–cement emulsion (MCE) mixtures are applied. The MCE mix is a conglomerate that can be used to make the base layer in road pavement structures. MCE mixes contain reclaimed asphalt from old, degraded road surfaces, aggregate improving the gradation, asphalt emulsion, and cement as a binder. The use of these ingredients, especially cement, can cause shrinkage and cracks in road layers. The article presents selected issues related to the problem of cracking in MCE mixtures. The authors of the study focused on reducing the cracking phenomenon in MCE mixes by using an innovative cement binder with recycled materials. The innovative cement binder based on dusty by-products from cement plants also contributes to the optimization of the recycling process in road surfaces. The research was carried out in the field of stiffness, fatigue life, crack resistance, and shrinkage analysis of mineral–cement emulsion mixes. It was found that it was possible to reduce the stiffness and the cracking in MCE mixes. The use of innovative binders will positively affect the durability of road pavements.

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Microstructure of synthetic composite interfaces and verification of mixing order in cold-recycled asphalt emulsion mixture

Cited by 112 publications

References 41 publications

Development and Laboratory Evaluation of a Cold Mix High-Early-Strength Epoxy Asphalt Concrete for Steel Bridge Deck Pavements

Development and Laboratory Evaluation of a Cold Mix High-Early-Strength Epoxy Asphalt Concrete for Steel Bridge Deck Pavements

Fatigue resistance of modified cold reclaimed mixes with 100% content of recycled asphalt pavement (RAP)

Research on the Properties of Mineral–Cement Emulsion Mixtures Using Recycled Road Pavement Materials

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