Modification and enhancing effect of SPUA material on asphalt binder: A study of viscoelastic properties and microstructure characterization

X, Sun; Peng, Qinyuan; Zhu, Yongqiang; Jin, Jiao; Xu, Jieting; Yin, Yingmei; Ng, Alex Hay‐Man

doi:10.1016/j.cscm.2022.e01781

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…Furthermore, as for the quantitative analysis of microscopic morphology, the existing literature has tried to measure the pore size [ 39 ]. In this paper, Image J software was used to analyze the correlating porosity, which would help to quantitatively characterize the deterioration of the concrete.…”

Section: Resultsmentioning

confidence: 99%

Research on Performance Deterioration of Internally Cured Pavement Concrete under the Coupling Effect of Salt Freeze–Thaw

Qin

Lin

et al. 2023

Polymers

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This paper aims at solving the material durability problem caused by spraying deicing salt on pavement concrete in the northern winter. Super absorbent polymer (SAP) was adopted as an internal curing agent to enhance the durability of pavement concrete. Curing parameters including particle size and dosage of SAP and curing condition were optimized based on mortar tests by means of the grey target decision method. The deterioration rule of durability and mechanical properties of pavement concrete internally cured by different SAP dosages after salt freeze–thaw cycles were explored through rapid freeze–thaw test. Combined with the characteristics of pore structure, hydration and microstructure, the influence mechanism of SAP on the salt freeze–thaw resistance of pavement concrete was revealed. The experimental results showed that: (i) The reduction in mass loss rate and relative dynamic modulus was significantly improved by SAP internal curing with moderate dosage; (ii) The more freeze–thaw cycles the specimen underwent, the greater the increase in strength; (iii) After 75 cycles, the chloride ion erosion depth could be decreased by approximately 23.18%. Moreover, the addition of SAP could refine the pore size, inhibit the generation of shrinkage microcracks, and promote the degree of cement hydration in the late stage, which improved the internal density of the cement concrete structure. Therefore, the deterioration of pavement under the coupling effect of salt freeze–thaw was reduced.

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Section: Resultsmentioning

confidence: 99%

Research on Performance Deterioration of Internally Cured Pavement Concrete under the Coupling Effect of Salt Freeze–Thaw

Qin

Lin

et al. 2023

Polymers

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“…Ethylenevinyl acetate copolymer, polyethylene and other modified asphalt both have good hightemperature performance and economy, but low-temperature performance is difficult to meet expectations [7][8][9][10]. For this reason, researchers are still searching for modifiers with good modification effects [11,12]. This paper investigated the effect of a high-performance resin material, SPUA, on high-temperature performance and fatigue performance of asphalt binders.…”

Section: Introductionmentioning

confidence: 99%

Sprayed-Polyurea-Modified Asphalt: Optimal Preparation Parameters, Rheological Properties and Thermal Properties

Peng

Liu

et al. 2023

Coatings

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For promoting modifying application of sprayed polyurea (SPUA) in asphalt pavement materials, the effects of sprayed polyurea materials on high-temperature and fatigue performance of asphalt binders were investigated from different aspects. First, the optimal preparation parameters of sprayed-polyurea-modified asphalt binders (SPMAs) were determined by designing an orthogonal test. Then, the high-temperature and fatigue properties of sprayed-polyurea-modified asphalt binders with different contents were characterized by rheological testing methods, including Brookfield rotary viscosity (RV) test, performance grading (PG) test, multiple stress creep recover (MSCR) test, linear amplitude sweep (LAS) test and time sweeping (TS) test. Finally, the thermal properties of the asphalt binders were analyzed by differential scanning calorimetry (DSC) test. The results showed that the optimum preparation parameters were determined by the extreme difference analysis method and analysis of variance (ANOVA) method, and the shearing time was 40 min, the shearing rate was 6000 rpm and the shearing temperature was 150 °C. Sprayed polyurea positively affected high-temperature performance of asphalt binders and could improve fatigue resistance of asphalt binders. Moreover, the Brookfield rotary viscosity test, multiple stress creep recover test and linear amplitude sweep test had high sensitivity to the performance of sprayed-polyurea-modified asphalt binder, which could help to distinguish the effect of sprayed polyurea dosing on performance of asphalt binders accurately. The differential scanning calorimetry test showed that sprayed polyurea was beneficial to high-temperature stability of asphalt binders, which explains the reason why sprayed-polyurea-modified asphalt binders have excellent high-temperature performance from a microscopic perspective.

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Thermosetting Polymer Modified Asphalts: Current Status and Challenges

Xie,

Li,

Wang

2023

Polymer Reviews

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Modification and enhancing effect of SPUA material on asphalt binder: A study of viscoelastic properties and microstructure characterization

Cited by 4 publications

References 16 publications

Research on Performance Deterioration of Internally Cured Pavement Concrete under the Coupling Effect of Salt Freeze–Thaw

Research on Performance Deterioration of Internally Cured Pavement Concrete under the Coupling Effect of Salt Freeze–Thaw

Sprayed-Polyurea-Modified Asphalt: Optimal Preparation Parameters, Rheological Properties and Thermal Properties

Thermosetting Polymer Modified Asphalts: Current Status and Challenges

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