Effects of different modifiers on thermal stability, constituents and microstructures of asphalt-based sealant

Zhang, Hanshuai; Sheng, Xiaohui; Wang, Siwen; Xu, Tao

doi:10.1007/s10973-020-09353-z

Cited by 9 publications

(6 citation statements)

References 25 publications

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“…As a viscoelastic material, the properties of asphalt vary with temperature and loading time, which has a great impact on its uses in road engineering [1,9,27]. The softening point index described in Section 3.1 can only be used to carry out a macro evaluation of the high-temperature resistance of asphalt sealant, and cannot achieve an accurate description of the microstructure of the asphalt sealant [22].…”

Section: Viscoelastic Mechanical Properties and Cam Model Fittingmentioning

confidence: 99%

“…Asphalt pavement is widely used in road engineering for its advantageous properties, which include short construction period, low noise, safety, comfortable driving, recyclability, etc. In recent years, with the rapid increase in traffic volume and vehicle load, serious asphalt pavement damage has occurred, and road maintenance measures have gradually become key to guaranteeing service performance [1,2]. Among many types of pavement damage, pavement cracking is one of the most common forms of damage, not only destroying the integrity of the pavement, but also leading to the infiltration of water, softening the base, weakening the bearing capacity of the base, and causing structural damage to the road [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the High-Temperature and Rheological Properties for Asphalt Sealant Modified by SBS and Rubber Crumb

Gong

Zhang

et al. 2022

Polymers

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Crack sealing is an important measure for pavement maintenance. Hot-poured crack sealant is the most utilized material for crack sealing. However, its poor high-temperature and rheological properties seriously weaken the mechanical properties of repaired pavement. Thus, to overcome the disadvantage of the poor high-temperature and rheological properties of sealant, styrene–butadiene–styrene (SBS) and rubber crumb (CR) were utilized for modifying the asphalt-based sealants. Softening point tests, temperature tests, frequency scan tests, and multiple stress creep recovery tests (MSCR) were conducted to evaluate the high-temperature and rheological properties of the modified sealant. Additionally, the influence of SBS and CR on the high-temperature performance of the modified sealant was quantitatively analyzed by the grey relational analysis method. The results reveal that the SBS has a greater enhancement effect on the high-temperature performance of sealant than CR. Increasing the SBS and CR content in the sealant could enhance the sealant’s high-temperature performance, stiffness, and elasticity. Compared with asphalt-based sealant and one-component modified asphalt-based sealant, SBS/CR-modified asphalt sealant has greater viscosity and higher temperature deformation resistance. Additionally, SBS can increase the stress level of the sealant, thereby enhancing the resistance of the sealant to permanent deformation.

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Section: Viscoelastic Mechanical Properties and Cam Model Fittingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of the High-Temperature and Rheological Properties for Asphalt Sealant Modified by SBS and Rubber Crumb

Gong

Zhang

et al. 2022

Polymers

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“…For example, Li [13] determined the best preparation process of the asphalt-based sealant containing styrene-butadiene-styrene block copolymer (SBS), plasticizer, and rubber powder through orthogonal experiments. Zhang et al [14] prepared a new type of asphalt-based sealant with three modifiers of SBS, polyurethane, and silicone. Li et al [15] reviewed the mechanism, performance, and application of polyurethane sealant.…”

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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“…Among many asphalt pavement crack repair materials, hot-poured sealant has been widely used because of its high cost effectiveness and good road performance [ 2 ]. However, the problems such as aging, fatigue, and lack of thermal stability of asphalt-based sealants will cause sealants to fail or even crack again [ 3 ]. Therefore, it is very necessary to prepare a kind of asphalt pavement crack sealant with excellent performance.…”

Section: Introductionmentioning

confidence: 99%

“…In order to prepare sealant with excellent performance, adding modifiers to sealant is a common method to improve sealant performance. Zhang et al [ 3 ] developed a new type of concrete pavement sealant, where styrene-butadiene-styrene (SBS) was selected as the modifier. It is found that SBS can form a stable network structure in asphalt and improve the flexibility of asphalt.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Preparation and Properties of Crack Sealants Based on CNTs/SBS Composite-Modified Asphalt

et al. 2021

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Crack is the main distress of asphalt pavement. Sealant is one of the most commonly used crack repair materials, and its performance is the key to affect the service life of asphalt pavements. In order to find an efficient modifier and optimize the performances of crack sealants. In this paper, carbon nanotubes (CNTs) and styrene-butadiene-styrene (SBS) were used as modifiers to prepare CNTs/SBS composite-modified asphalt crack sealant. The properties of the sealant were tested to evaluate its suitability for crack repair, which included the viscosity, softening point, resilience recovery, cone penetration, flow value, penetration, aging resistance, and fatigue resistance. The results showed that the conventional properties of the sealants meet the requirements of the specification. In addition, after heating aging, the elastic recovery rate of the sealant containing more CNTs decreased only slightly. The sealant containing 1 wt% CNTs exhibited a higher viscosity, fatigue resistance, thermal aging resistance.

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Effects of different modifiers on thermal stability, constituents and microstructures of asphalt-based sealant

Cited by 9 publications

References 25 publications

Investigation of the High-Temperature and Rheological Properties for Asphalt Sealant Modified by SBS and Rubber Crumb

Investigation of the High-Temperature and Rheological Properties for Asphalt Sealant Modified by SBS and Rubber Crumb

Effects of Dioctyl Phthalate on Performance of Asphalt Sealant

Investigation on Preparation and Properties of Crack Sealants Based on CNTs/SBS Composite-Modified Asphalt

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