Preparation and Properties of Bitumen-Modified Polyurethane Solid–Solid Phase Change Materials

Wei, Kun; Ma, Biao; Duan, Shiyu

doi:10.1061/(asce)mt.1943-5533.0002795

Cited by 40 publications

(11 citation statements)

References 30 publications

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“…The PCM went through a phase change during the heating process, which resulted in a higher softening point. These findings were in line with what was expected [42]. However, the softening point was slightly enhanced due to the effective micro−capsule protection against PCM.…”

Section: Effects Of Pcm Modification On Physical Properties Of Asphaltsupporting

confidence: 92%

“…Most research has focused on the application of PCM in asphalt mixture, with little attention paid to the impact of PCM on the properties of the asphalt binder. Wei [41,42], Zhang [15], Bueno [43] investigated the physical properties, rheological properties, and temperature adjustable performance of asphalt modified with polyurethane solid−solid PCM, expanded graphite (EG)/polyethylene glycol (PEG) composite PCM, and micro−encapsulated tetradecane PCM, respectively. This paper deals with the influence of solid−solid composite shape−stabilized PCM, which are directly added to asphalt, on the properties of matrix and SBS−modified asphalt.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Solid-Solid Phase Change Material’s Direct Interaction on Physical and Rheological Properties of Asphalt

Zhao

Guo²,

Ma³

et al. 2022

Coatings

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Asphalt pavement is a temperature−sensitive structure that is prone to temperature-related diseases. Phase change material (PCM) is an excellent candidate for mitigating these diseases. This paper looked into the effects of indirect composite shape-stabilized PCM incorporation on the characteristics of asphalt. The compatibility, physical properties, and rheological properties of asphalt with various PCM content before and after aging were thoroughly investigated. No phase separation and no chemical reaction occurred between PCM and asphalt. The physical properties improved with the addition of PCM, and the high−temperature performance indexes improved while the low−temperature performance indexes decreased as the aging process progressed. The effects of PCM on the rheological properties of the matrix and SBS−modified asphalt was distinct. PCM was added to improve the high−temperature rheological characteristics of the matrix asphalt when the temperature was higher than 52 °C, while PCM reduced the high−temperature rheological properties of the SBS−modified asphalt. The aging process has an impact on the high−temperature rutting factor of asphalt with a high PCM content. The low−temperature creep behavior and PG grade of asphalt were both improved. The implication of PCM is that it cannot increase the thermoregulation of asphalt pavement without the cost of scarifying the performance of the asphalt or mixture.

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Section: Effects Of Pcm Modification On Physical Properties Of Asphaltsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Effect of Solid-Solid Phase Change Material’s Direct Interaction on Physical and Rheological Properties of Asphalt

Zhao

Guo²,

Ma³

et al. 2022

Coatings

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“…These properties are detailed in Table A1 , demonstrating their necessary roles in various applications. Also, as shown in Table A1 , the most frequently employed materials as PCM are polyethylene glycols, or PEGs, notably PEG2000 and PEG4000, due to their significant enthalpies during phase changes [ 12 , 13 , 25 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ]. These materials exhibit desirable attributes such as thermal and chemical stability, non-toxicity, and an appropriate phase change temperature range [ 44 ] during the phase change from solid.…”

Section: Resultsmentioning

confidence: 99%

“…Conversely, PCM with higher melting points around 50 °C to 60 °C, such as types PEG1000 to PEG8000 [ 12 , 13 , 25 , 26 , 35 , 36 , 37 , 40 , 42 , 62 ], OP55E [ 63 ], stearic acid (SA) [ 11 , 64 ], PCM-43 and PCM-48 [ 46 ], and ceresin wax [ 65 ], could be employed in high-temperature thermal energy storage applications. These are particularly suitable for tropical and temperate locales where summer temperatures can get excessively high, posing a risk to the mechanical integrity of asphalt material.…”

Section: Resultsmentioning

confidence: 99%

Advancements in Phase Change Materials in Asphalt Pavements for Mitigation of Urban Heat Island Effect: Bibliometric Analysis and Systematic Review

Pinheiro,

Landi,

Lima

et al. 2023

Sensors

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This research presents a dual-pronged bibliometric and systematic review of the integration of phase change materials (PCMs) in asphalt pavements to counteract the urban heat island (UHI) effect. The bibliometric approach discerns the evolution of PCM-inclusion asphalt research, highlighting a marked rise in the number of publications between 2019 and 2022. Notably, Chang’an University in China has emerged as a leading contributor. The systematic review addresses key questions like optimal PCM types for UHI effect mitigation, strategies for PCM leakage prevention in asphalt, and effects on mechanical properties. The findings identify polyethylene glycols (PEGs), especially PEG2000 and PEG4000, as prevailing PCMs due to their wide phase-change temperature range and significant enthalpy during phase transitions. While including PCMs can modify asphalt’s mechanical attributes, such mixtures typically stay within performance norms. This review emphasises the potential of PCMs in urban heat management and the need for further research to achieve optimal thermal and mechanical balance.

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“…Modified bitumen containing 1, 3, and 5 wt% of STPU were defined as STPUB1.0, STPUB3.0, and STPUB5.0, respectively. In this study, the STPU contents in NA were set considering the polyurethane contents in previous research works, which ranged from 1% to 7% [ 22 , 23 , 24 ]. Hence, after numerous trial and error tests at the laboratory level, it was decided that STPU contents should be 1%, 3%, and 5%.…”

Section: Methodsmentioning

confidence: 99%

Performance Assessment of Self-Healing Polymer-Modified Bitumens by Evaluating the Suitability of Current Failure Definition, Failure Criterion, and Fatigue-Restoration Criteria

Wang

et al. 2023

Materials

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Fatigue cracking is a common form of flexible pavement distress, which generally starts and spreads through bitumen. To address this issue, self-healing elastomer (SHE) modified bitumens were elaborated to assess whether these novel materials can overcome the neat asphalt (NA) fatigue performance and whether the current failure definition, failure criterion, and fatigue-restoration criteria can fit their performance. All bitumens were subjected to short-term and long-term aging. Linear amplitude sweep (LAS) test, LAS with rest period (LASH), and simplified viscoelastic-continuum-damage (S-VECD) model were utilized to appraise the behavior of the mentioned bitumens. The results showed that maximum stored pseudo-strain energy (PSE) and tau (τ) × N (number of loading cycles) failure definitions exhibited high efficiency to accommodate the fatigue life of NA and SHE-modified bitumens. Both failure criteria identified that SHE-modified bitumen (containing 1% of SHE) showed the highest increment of fatigue performance (67.1%) concerning NA. The failure criterion based on total released PSE, in terms of the area under the released PSE curve, was the only failure concept with high efficiency (R2 up to 0.999) to predict asphalt binder fatigue life. As well, the current framework to evaluate bitumen self-restoration failed to fully accommodate asphalt binder behavior, because bitumen with higher restoration could not exhibit greater fatigue performance. Consequently, a new procedure to assess this property including fatigue behavior was proposed, showing consistent results, and confirming that SHE-modified bitumen (containing 1% of SHE) exhibited the highest increment of fatigue performance (154.02%) after application of the rest period. Hence, the optimum SHE content in NA was 1%. Furthermore, it was found that a greater number of loading cycles to failure (Nf) did not ensure better fatigue performance and stored PSE influenced the bitumen fatigue behavior.

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Preparation and Properties of Bitumen-Modified Polyurethane Solid–Solid Phase Change Materials

Cited by 40 publications

References 30 publications

Effect of Solid-Solid Phase Change Material’s Direct Interaction on Physical and Rheological Properties of Asphalt

Effect of Solid-Solid Phase Change Material’s Direct Interaction on Physical and Rheological Properties of Asphalt

Advancements in Phase Change Materials in Asphalt Pavements for Mitigation of Urban Heat Island Effect: Bibliometric Analysis and Systematic Review

Performance Assessment of Self-Healing Polymer-Modified Bitumens by Evaluating the Suitability of Current Failure Definition, Failure Criterion, and Fatigue-Restoration Criteria

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