Evaluation of potential applicability of modified solvent deasphalted residue as an asphalt crack sealant

Kim, Jeonghyun; Jang, Haneol; Kim, Nam-Ho

doi:10.1080/14680629.2020.1845784

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…The surface of the sealants hardened, became brittle, and cracked after aging; the polymer particles degraded; and the light component of the asphalt matrix gradually transformed into a granular asphaltene. Kim et al [12] modified solvent deasphalting (SDA) residual oil with oil, SBS, and rubber powder, and the results showed that the addition of rubber powder reduced the adhesion of the sealants. The problems of low bonding, a short fatigue life, and a lack of aging resistance in the research of modified asphalt sealants have limited the promotion and engineering application of sealants.…”

Section: Introductionmentioning

confidence: 99%

Study on Thermal Stability and Fatigue Properties of SBS/CNT-Modified Asphalt Sealant

Gong,

Wu,

et al. 2023

Polymers

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Carbon nanotubes (CNTs) and styrene–butadiene–styrene (SBS) are used as reinforcing modifiers in asphalt sealants due to their excellent properties, which can effectively improve the internal structure of the sealant and enhance its mechanical properties. Based on this background, two SBS/CNT-modified asphalt sealants were identified and selected by the orthogonal experimental method and compared with two commercially available sealants. The softening point, flow value, multi-temperature frequency scan test, and multiple stress creep recovery test were used to study the high-temperature rheological properties and aging resistance of four types of sealants. The overall evaluation shows that the proportion of the sealant compound’s preparation material is 1% by weight of CNT doping, 5% by weight of SBS doping, and 5% by weight of furfural-extracted-oil doping. The results show that the addition of SBS and CNTs more significantly improves the fatigue resistance of the sealants. With the CAM model, C1.0S5F5 reflects a better relaxation property, which better avoids secondary cracking after the construction of the sealant. With the Burgers model, C1.0S5F5 shows excellent deformation resistance under heavy traffic conditions. In summary, conventional performance indicators, such as the softening point and flow value of SBS/CNT-modified asphalt sealants, can meet the specification requirements and show good high-temperature stability and anti-aging properties compared to commercially available sealants.

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Section: Introductionmentioning

confidence: 99%

Study on Thermal Stability and Fatigue Properties of SBS/CNT-Modified Asphalt Sealant

Gong,

Wu,

et al. 2023

Polymers

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“…Tan et al [16] improved the repeatable repair ability of asphaltbased crack sealant by adding two kinds of microcapsules. In addition, solvent deasphalted has also been used to prepare asphalt-based sealants [17].…”

Section: Introductionmentioning

confidence: 99%

Effects of Dioctyl Phthalate on Performance of Asphalt Sealant

Luo¹,

Guo

Wang

et al. 2022

Advances in Materials Science and Engineering

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Dioctyl phthalate (DOP) was introduced into asphalt-based sealant as a plasticizer in this work. Four kinds of sealants with different DOP content were prepared, and thermal stability and low-temperature performance of five samples with asphalt as a control group were evaluated by fluidity test, softening point test, thermogravimetric-differential thermal analysis (TG-DTA), low-temperature tensile test, and differential scanning calorimeter (DSC), respectively. Furthermore, the mechanism of DOP on sealant properties was analyzed by Fourier transform infrared spectroscopy (FTIR) and fluorescence microscope. Results show that DOP can significantly improve the low-temperature performance of sealant, but slightly deteriorate the high-temperature performance. This is because DOP can supplement the light component of sealant and enhance the fluidity of the internal components. On the one hand, DOP reduces the apparent activation energy of sealant and lowers the barrier to chemical reactions, indicating that DOP is slightly detrimental to the thermal stability of sealant. On the other hand, DOP greatly reduces the glass transition temperature of sealant and improves its low-temperature performance. However, there is no evident chemical reaction between DOP and sealant, and physical effects play a major role in the effects of DOP on sealant properties. In addition, DOP can promote the expansion and cross-linking of the polymer in the sealant and ultimately enhance the compatibility between asphalt and polymer molecules. In short, DOP is recommended as a plasticizer to prepare asphalt sealants with excellent properties.

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