Effect of gradations on the final and long-term performance of asphalt emulsion cold recycled mixture

Zhu, Chongzheng; Zhang, Henglong; Guo, Hao; Wu, Chaofan; Wei, Chuanwen

doi:10.1016/j.jclepro.2019.01.264

Cited by 43 publications

(8 citation statements)

References 23 publications

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“…The optimum water content (OWC) of cold recycle mixture with asphalt emulsion (CRME) with G 37, G 41 and G 45 are 4.31 %, 4.74 % and 5.02 %, respectively. It indicates that the further fines in CRME contribute to a wider region of CRME, which requires further water to soak the aggregate [24]. Koohmishi & Shafabakhsh et al, obtained indicate that supplying a smaller gradation of the aggregate (especially with a lower effective diameter) contributes to a decrease in the permeability of the reservoir.…”

Section: Aggregate Gradation Of Porous Asphaltmentioning

confidence: 98%

“…If the ageing era begins, the indirect tensile strength (ITS) and the ITS-freezing ratio of all CRME will first increase rapidly and then increase gradually or even decrease, and the ageing of asphalt in CRME will become more and more extreme. Compared to three gradations, the better gradation of the CRME has increased final and long-term efficiency [24]. Although some studies have studied the impact of gradation on the final performance of CRME, longterm performance has been overlooked.…”

Section: Aggregate Gradation Of Porous Asphaltmentioning

confidence: 99%

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Porous Asphalt Modification using Different Types of Additives: A Review

2021

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Nowadays porous asphalt pavement increase usage other than the traditional type of asphalt pavement. In that sense porous asphalt specially use in the parking areas and walk ways for pedestrian. There are diverse ways that has been done in order to stick up to permanent degradation such as adding fibers and modifiers like polymers, chemical modifiers, expandars, oxidants and antioxidents, hydrocarbons and antistripping to enhance the fatigue and service life of the pavement. To use these type of additives in porous asphalt pavement some additive increase the mechanical performance of porous asphalt mixture and improve the serviceability of the pavement. Digital image processing use these type of pavement to reduce the air void of the asphalt mixture and increase the physical properties of the porous asphalt pavement. This review paper mainly discuss the overall performance and advantage of porous asphalt using different types of additives.

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Section: Aggregate Gradation Of Porous Asphaltmentioning

confidence: 98%

Section: Aggregate Gradation Of Porous Asphaltmentioning

confidence: 99%

Porous Asphalt Modification using Different Types of Additives: A Review

2021

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“…In addition, coarse- and fine-aggregate gradation also have an important impact on the performance of asphalt pavement. In particular, when CRM is used in cold regions, the selection of a reasonable gradation should focus on the low-temperature crack resistance [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Study on Low-Temperature Index and Improvement Measures of Emulsified Asphalt Cold Recycled Mixture

Han

et al. 2022

Materials

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With the promotion of cold recycled mixture (CRM) in cold areas and the improvement of its application layer, the enhancement of the low-temperature performance of mixtures is particularly important. The applicability of the current low-temperature bending test method to CRM is controversial. Firstly, the low-temperature crack resistance of CRM with different gradations and emulsified asphalt contents was studied by the indirect tensile (IDT) test and the semi-circular bending (SCB) test. Thereafter, the low-temperature performance evaluation index suitable for CRM was put forward. Then, the low-temperature performance of CRM with different gradations, fiber types, and contents was evaluated by using the above low-temperature evaluation index. The results show that the low-temperature performance of CRM with different gradations and emulsified asphalt contents can be distinguished by fracture work (W) and fracture energy (Gf). Not only do the test results have little variability (about 12% and 15%, respectively), but also the correlation coefficient with the new asphalt film thickness is the highest (0.8595 and 0.8939, respectively). Compared with coarse gradation (AC-25) and fine gradation (AC-13), medium-gradation (AC-20) CRM has higher low-temperature performance, and polyester fiber can significantly improve the low-temperature performance of CRM. Compared with non-fiber, the W and Gf of CRM of polyester fiber (0.3% content) can be increased by at least 42% and 30%, respectively.

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“…The mixing, transportation, and rolling of cold recycled mixture are carried out under normal temperatures and have the advantages of low carbon emission, convenient construction, and high-cost performance. It is more widely used in the reconstruction, expansion, maintenance, and repair of roads and other projects (Sondag et al, 2002;Xiao et al, 2018;Zhu et al, 2019). The reasonable design method and laboratory molding process of cold recycled mixture are the bases of the successful application of Emulsified asphalt cold recycling technology (Lu, 2001;National Cooperative Highway Research Program, 2007).…”

Section: Introductionmentioning

confidence: 99%

Study on the Laboratory Mixing and Compaction Methodology of Emulsified Asphalt Cold Recycled Mixture

Liu

Han

Wu³

et al. 2020

Front. Mater.

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Emulsified asphalt cold recycled mixture is commonly used in the upper base course of expressway reconstruction asphalt pavement. When the following layer is paved with hot-mix asphalt (HMA) mixture, the aging asphalt in the recycled material is activated due to the temperature conduction effect of the HMA mixture, so that the cold recycled layer produces "secondary thermal compaction" under the action of a roller. Based on this phenomenon, the present study aimed to discuss the influence of different molding methods and mixing processes on the volume parameters and mechanical properties of cold recycled emulsified asphalt mixture. The influences of Marshall compaction times, gyratory compaction times, curing time, and specimen-forming temperature on the voids and splitting strength of cold recycled mixture were studied. The field core sample was compared with the laboratory-forming method, which accords with the field compaction condition of the cold recycled upper base. first-time compaction number of large Marshall is 150 times and secondary compaction number is 75 times (Shorthand for 150 + 75), the compaction times of the gyratory specimen is "30 + 15." The curing time of the cold recycled mixture should not exceed 3 h and should not be constructed in low-temperature weather to ensure the quality of pavement construction. The use of a new stage and step laboratory mixing process simulating the plant mixing, compared with the traditional mixing process, increases the splitting strength by at least 13%.

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Effect of gradations on the final and long-term performance of asphalt emulsion cold recycled mixture

Cited by 43 publications

References 23 publications

Porous Asphalt Modification using Different Types of Additives: A Review

Porous Asphalt Modification using Different Types of Additives: A Review

Study on Low-Temperature Index and Improvement Measures of Emulsified Asphalt Cold Recycled Mixture

Study on the Laboratory Mixing and Compaction Methodology of Emulsified Asphalt Cold Recycled Mixture

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