Investigation on self-healing performance of asphalt mixture containing microcapsules and survival behaviour of microcapsules

Chen, Yun; Ji, Xiaoping; Si, Botong; Zhang, Zhengming; Shao, Dongye; Zhu, Shiyu; He, Shupeng

doi:10.1080/10298436.2023.2165657

Cited by 10 publications

(3 citation statements)

References 26 publications

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“…The underlying reason for this phenomenon was that the bitumen softened, and its viscosity reduced as the temperature rose in the matrix bituminous mixture, thereby enhancing its self-healing capability. As for UFM bitumen mixture, in addition to this reason, the increase in temperature also increased the diffusion rate of the rejuvenator, allowing it to penetrate the bitumen more quickly [52]. Furthermore, under different healing times, the healing rate of UFM bituminous mixtures consistently surpassed that of matrix bituminous mixtures, underscoring the efficacy of UFM in enhancing the self-healing property of the bituminous mixture.…”

Section: Effect Of the Healing Temperature On Healing Ratementioning

confidence: 87%

Road Performance and Self-Healing Property of Bituminous Mixture Containing Urea–Formaldehyde Microcapsules

Zhang,

Yao,

Cheng

2024

Materials

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Urea–formaldehyde (UF) is a common shell material for self-healing microcapsules; however, the influence of urea–formaldehyde microcapsules (UFMs) on the road performance of bituminous mixtures and the sensitivity of their healing abilities remains unclear. In this paper, UFMs were prepared via in situ polymerization (ISP), followed by an investigation into the road performance of UFM self-healing bituminous mixtures through various tests, including wheel tracking, immersed Marshall, freeze–thaw splitting, low-temperature bending, and three-point bending fatigue tests. Subsequently, the impact of the damage degree, healing duration, and temperature on the self-healing property was discussed. The results indicated that incorporating 3 wt% UFMs into bitumen significantly improved the high-temperature stability and fatigue resistance of the bituminous mixture; for example, its dynamic stability and fatigue life could be increased by about 16.5% and 10%, respectively. However, it diminished the thermal crack resistance, as evidenced by decreases in bending tensile strength and strain by 3.7% and 10.1%, respectively. And it did not markedly improve the moisture susceptibility. Additionally, the maximum improvement observed in the healing rate was about 9%. Furthermore, the healing duration and temperature positively influenced the bituminous mixture’s self-healing, whereas the degree of damage exerted a negative impact, with a relatively significant effect.

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Section: Effect Of the Healing Temperature On Healing Ratementioning

confidence: 87%

Road Performance and Self-Healing Property of Bituminous Mixture Containing Urea–Formaldehyde Microcapsules

Zhang,

Yao,

Cheng

2024

Materials

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“…In the construction industry, asphalt pavement is a common form of pavement used in road projects [ 13 , 14 , 15 , 16 ]. The performance of the asphalt mixture depends on the gradation of aggregate and the properties of the asphalt mastic, which is made of asphalt and mineral powder and functions as a bonding agent.…”

Section: Introductionmentioning

confidence: 99%

The Effect of GFRP Powder on the High and Low-Temperature Properties of Asphalt Mastic

et al. 2023

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Glass fiber reinforced polymer (GFRP) is the main composite material used in wind turbine blades. In recent years, zero-carbon energy sources such as wind power have been widely used to reduce carbon emissions, resulting in a large amount of waste GFRP, and causing serious environmental problems. To explore efficient ways to recycle waste GFRP, this study explores the impact of adding GFRP powder (nominal maximum particle size ≤ 0.075 mm) on the high and low temperature properties of asphalt mastic. Samples of GFRP asphalt mastics were prepared with filler-asphalt mass ratios of 0.01:1, 0.1:1, 0.8:1, and 1:1, as well as two control samples of limestone filler asphalt mastics with filler-asphalt mass ratios of 0.8:1 and 1:1. The study analyzed the effect of GFRP on the asphalt mastic’s performance using temperature sweep, MSCR, and BBR tests. Results showed that the presence of GFRP improved the high-temperature resistance and recovery of asphalt mastic but led to decreased low-temperature crack resistance. The results suggest that GFRP has the potential to be used as a filler in asphalt mastic, with a recommended filler-asphalt mass ratio range of less than 0.8:1 for optimal low-temperature performance. However, further research is necessary to determine the optimal content of GFRP in asphalt mastic and to study its impact on other road performance metrics.

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“…Yomthong et al (2021) found that the compressive strength of fly ash-based geopolymer can reach 55.7 MPa, which was prepared with different molar ratios of Na 2 SiO 3 and NaOH as alkali activator. The metakaolin, blast furnace slag, fiber and red mud are always added to further improve the performance of geopolymer (Liu et al, 2018;Li et al, 2019;Nuaklong et al, 2020;Faris et al, 2021;Chen et al, 2023). The addition of these materials can improve the Si/Al ratio, promote the polymerization reaction, and prolongs the initial setting time to a certain extent (Sinha et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Durability of geopolymer stabilized domestic waste incineration slag blending macadam in pavement base

Ji,

Mou,

Zhang

et al. 2023

Front. Mater.

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In order to achieve the high quality and large-scale utilization of domestic waste incineration slag (WIS) in pavement base, a geopolymer prepared using fly ash from domestic waste incineration was used to replace the cement to stabilized WIS blending macadam used in the pavement base. The durability of the geopolymer stabilized WIS blending macadam (called as GeoWIS) was investigated, including the water stability, freeze-thaw resistance and dry shrinkage. The strength formation was identified using SEM analyses. Furthermore, the durability of GeoWIS was investigated and compared with those of cement stabilized macadam (CSM). Results show that the 7 days compressive strength of GeoWIS meets the strength criterion of the asphalt pavement base (≥2 MPa), except for the combination of 8% geopolymer and 100% WIS. The water stability coefficient and residual compressive strength ratio of GeoWIS increase as the geopolymer increases and WIS decreases. The cumulative dry shrinkage and dry shrinkage coefficient decrease as the WIS increases, while the cumulative water loss rate of GeoWIS increases. SEM analysis shows that the geopolymer reaction generates C-S-H gels, N-A-S-H gels, and Aft, which is the source of the GeoWIS strengths. GeoWIS has better water stability than CSM, and its freeze-thaw resistance and average dry shrinkage coefficient are lower than the average values for CSM.

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Investigation on self-healing performance of asphalt mixture containing microcapsules and survival behaviour of microcapsules

Cited by 10 publications

References 26 publications

Road Performance and Self-Healing Property of Bituminous Mixture Containing Urea–Formaldehyde Microcapsules

Road Performance and Self-Healing Property of Bituminous Mixture Containing Urea–Formaldehyde Microcapsules

The Effect of GFRP Powder on the High and Low-Temperature Properties of Asphalt Mastic

Durability of geopolymer stabilized domestic waste incineration slag blending macadam in pavement base

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