Preparation and mechanism of rubber-plastic alloy crumb rubber modified asphalt with low viscosity and stabilized performance

Peng, Weiming; Ping, Li; Gong, Weiping; Tian, Shuaituan; Wang, Zihan; Liu, S.-J.; Liu, Zhaohui

doi:10.1016/j.conbuildmat.2023.131687

Cited by 10 publications

(5 citation statements)

References 42 publications

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“…3 Turn on the rainfall system and then turn it off after rainfall is simulated for 30 min. 4 Turn on the blower system, and turn it off after blowing for 15 min. The above steps were repeated for the sizeable wet temperature cycle test.…”

Section: Mechanical Performance Testmentioning

confidence: 99%

“…On this basis, the comprehensive integrated correction coefficient K VF of the void ratio and the cut layer was introduced. The prediction equation of the strength modulus with a void ratio of 4.1% for Cut Layer 1 was used as the basis, and the coefficients of the equations under the conditions of different cut layers and air voids were corrected and integrated, as shown in Equation (4). Subsequently, the prediction model parameters with a void ratio of 4.1% for Cut Layer 1 were used to calculate the equations with different cut layers and air voids, and the relationship between the relevant parameters was fitted.…”

Section: Establishment Of Prediction Modelmentioning

confidence: 99%

“…The infiltration of rainwater along the cracks further aggravates the decay of the mechanical properties of the asphalt mixture [3]. Although modifiers, fibers, rubber, and other additives can be used to improve the effectiveness of asphalt mixtures in terms of their resistance to the wet temperature cycle [4,5], early-stage damage such as severe water damage and cracking [6] still occurs in asphalt pavements in the region [7,8]. Therefore, it is of great significance to analyze the decay law of the mechanical properties of asphalt mixtures under the action of a sizeable wet temperature cycle for the design of asphalt pavements in high-temperature and rainstorm-prone areas in summer and to reduce the early-stage damage caused by the temperature and humidity changes in the asphalt pavements in this area.…”

Section: Introductionmentioning

confidence: 99%

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Decay Characteristics of Mechanical Properties of Asphalt Mixtures under Sizeable Wet Temperature Cycle

Li,

Wei,

et al. 2023

Applied Sciences

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Asphalt mixtures will inevitably be affected by rainwater and the effect of the wet temperature cycle during a pavement’s life span. Especially in coastal areas such as Guangdong and Hainan in China, asphalt pavement is particularly susceptible to the sizeable wet temperature cycle formed by the high temperature and sudden temperature drop of rainstorms in summer. For this study, we used a homemade sizeable wet temperature cycle environment simulation device to analyze the decay characteristics and the mechanical properties of asphalt pavements in this environment; modified bending and tensile strength and shear strength tests were used to study the decay patterns of shear strength, bending, and tensile strength, and the stiffness modulus of asphalt mixtures with different air voids and different pavement depths under the action of a sizeable wet temperature cycle. In addition, the Grey correlation method was used to analyze the significance of each influencing factor on the decay of mechanical properties, and mathematical fitting was used to establish the prediction equation of the mechanical properties of asphalt mixtures. The results show that with the increase in the number of sizeable wet temperature cycles, the asphalt mixture’s shear strength, flexural tensile strength, and flexural tensile modulus decrease, the degree of decay increases, and the rate of decay gradually slows down. In the case of the same number of sizeable wet temperature cycles, the degree of decay of the asphalt mixtures gradually decreases with increasing depth or decreasing void ratio. After 100 sizeable wet temperature cycles, the maximum values of the decay of shear strength, modulus of strength, and flexural tensile strength were 22.30%, 23.29%, and 32.01%. The importance of the influence of each factor on the decay of the mechanical properties is as follows: the number of sizeable wet temperature cycles > void rate > depth. The prediction equations of the established mechanical properties have a good prediction effect, and the correlation between predicted values and actual values can be up to 0.925. The prediction equations can effectively predict the mechanical properties of asphalt mixtures with different air voids and depths under the action of sizeable wet temperature cycles.

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Section: Mechanical Performance Testmentioning

confidence: 99%

Section: Establishment Of Prediction Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Decay Characteristics of Mechanical Properties of Asphalt Mixtures under Sizeable Wet Temperature Cycle

Li,

Wei,

et al. 2023

Applied Sciences

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“…CRMA had excellent properties (including high and low temperature performance and insensitivity to temperature changes) and economic performance. More importantly, the crumb rubber prepared from waste tires has excellent environmentally friendly properties [16,17]. It meets the requirements of sustainable social development.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Laboratory Evaluation of Crack Resistance for an Asphalt Rubber Stress-Absorbing Membrane Interlayer (AR-SAMI)

Ping

Peng

Tian³

et al. 2023

Sustainability

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Reflective cracking is a common distress of semi-rigid base asphalt pavements and overlay pavement projects. An asphalt rubber stress-absorbing membrane interlayer (AR-SAMI) prepared by waste tires is an effective engineering solution for treating reflective cracking. This method can also reduce black pollution. However, there is no unified test method and index for crack resistance evaluation. In this work, AR-SAMIs with different air voids and gradations were investigated. A small beam bending test (BBT) at −10 °C and 15 °C, crack expansion SCB (CE-SCB) test, low-temperature SCB (LT-SCB) test, and Overlay Test (OT) were performed to evaluate the crack resistance of AR-SAMI comprehensively. Statistical analysis was also performed. Results showed that the crack resistance of AR-SAMI improved as the air voids decreased. The crack resistance of 10-A gradation with more fine aggregate was excellent. However, the AR-SAMI with more coarse aggregate had better crack extension resistance under the condition of pre-existing cracks. There are differences in the evaluation results of different test methods due to the various evaluation focus. The −10 °C BBT, CE-SCB, and OT were recommended to evaluate the crack resistance comprehensively. Research results can guide the evaluation method or index selection of crack resistance and the optimization of AR-SAMI mixture design under different working conditions.

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“…The most traditional and common airport pavement deicers were chloride salts, such as sodium chloride, calcium chloride, and magnesium chloride (Hanke et al, 2019;Terry et al, 2020;Gruber et al, 2023a). Although they could ensure the safety of the pavement in winter conditions, they also caused severe corrosion to the pavement structure and airport facilities (Fischel, 2001;Fay and Shi, 2012;Peng et al, 2023). Previous studies have shown that chloride ions could penetrate the pavement, causing pavement cracking, increased permeability, and reduced compressive strength, ultimately leading to a significant decrease in pavement performance (Shi et al, 2014;Das and Pradhan, 2019;Gruber et al, 2023b).…”

mentioning

confidence: 99%

Effect of deicing agents on the performance of airport asphalt pavement

Li,

Peng,

Han

et al. 2023

Front. Mater.

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Deicing agents are widely used to remove ice and snow on airport pavement, ensuring air traffic operation and safety. However, excessive spraying may affect the performance of airport pavement. The effects of different chloride deicing agents on the performance of airport asphalt and mixture have been assessed by previous studies. The three deicing agents (NaCl, KHF-1A, and NW056) were selected. Conducting various tests to examine their influence on the performance of asphalt and asphalt mixture. The tests include the DSR test, BBR test, indirect tensile test, bending test of small beam, and freeze-thaw splitting test. The results indicate that the asphalt anti-rutting factor G*/sinδ varies by 25%–45%, the asphalt creep stiffness increases by 15%–50%, and the anti-fatigue factor (G* sinδ) increases by 10%–40% under the effect of the deicing agents. The splitting strength of the mixture decreases by 10%–40%, the bending stiffness modulus increases by 6%–20%, and the freeze-thaw splitting strength ratio does not change significantly under the effect of the deicing agents. NW056 deicing agent has minimal effect on the performance of airport pavement and has optimal performance. The replacement of traditional chloride deicing agents helps to prolong the service life of airport asphalt pavement.

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Preparation and mechanism of rubber-plastic alloy crumb rubber modified asphalt with low viscosity and stabilized performance

Cited by 10 publications

References 42 publications

Decay Characteristics of Mechanical Properties of Asphalt Mixtures under Sizeable Wet Temperature Cycle

Decay Characteristics of Mechanical Properties of Asphalt Mixtures under Sizeable Wet Temperature Cycle

Comprehensive Laboratory Evaluation of Crack Resistance for an Asphalt Rubber Stress-Absorbing Membrane Interlayer (AR-SAMI)

Effect of deicing agents on the performance of airport asphalt pavement

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