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The next-generation of pavement maintenance and rehabilitation (M&R) decision-making needs to weigh multiple strategic goals to achieve sustainable development through the pavement maintenance management system (PMMS). Motivated by good versatility in solving highly complex conflict problems, the application of multi-objective optimization (MOO) for pavement M&R has recently become a hot-spot issue. This review aims to provide the state-of-the-art development and application of MOO methods for the PMMS decision-making module and the associated MOO model, decision-making tools, and optimization techniques. The strategic decision-making goals, decision processes, sources and characterization methods of uncertainty, intelligent algorithm followed across the globe were reviewed. Further, the latest development of multi-objective decision-aid tools (MODAT) for PMMS was discussed while emphasizing the importance of establishing joint MOO optimization model of multiple facilities and multiple M&R techniques for PMMS to achieve intelligent decision-making. The existing deficiencies and future direction of research have been discussed.
Wang Chen; Mulian Zheng. Multi-objective optimization for pavement maintenance and rehabilitation decision-making: A critical review and future directions. Automation in Construction 2021, 130, 103840 .
AMA StyleWang Chen, Mulian Zheng. Multi-objective optimization for pavement maintenance and rehabilitation decision-making: A critical review and future directions. Automation in Construction. 2021; 130 ():103840.
Chicago/Turabian StyleWang Chen; Mulian Zheng. 2021. "Multi-objective optimization for pavement maintenance and rehabilitation decision-making: A critical review and future directions." Automation in Construction 130, no. : 103840.
The objective of this paper is to evaluate the performance of a newly developed fog seal material of Waterborne Epoxy Resin (WER) and Styrene Butadiene Rubber (SBR) Composite Modified Emulsified Asphalt Fog Seal (WER-SCMEA Fog Seal) to overcome the intractable problems of SBR modified emulsified asphalt fog seal (SBR-Fog Seal). The process property, pavement performance and durability were investigated by a series of laboratory tests and compared with SBR-Fog Seal. Results show that the WER-SCMEA Fog Seal has good pavement performance, such as good waterproof performance. Besides, the WER-SCMEA Fog Seal has good durability, such as good water stability, wear resistance, etc. In addition, WER-SCMEA Fog Seal can improve the strength of asphalt mixture for the formation of three-dimensional network skeleton structure of curing product due to the comprehensive effects of curing reaction, physical intertwine and chemical cross-linking reaction among WER, curing agent and SBR modified emulsified asphalt. The study of this paper laid a foundation for the investigation of WER-SCMEA Fog Seal with sand.
Fuqiang Liu; Mulian Zheng; Xia Liu; Xiaoyan Ding; Fei Wang; Qianqian Wang. Performance evaluation of waterborne epoxy resin-SBR composite modified emulsified asphalt fog seal. Construction and Building Materials 2021, 301, 124106 .
AMA StyleFuqiang Liu, Mulian Zheng, Xia Liu, Xiaoyan Ding, Fei Wang, Qianqian Wang. Performance evaluation of waterborne epoxy resin-SBR composite modified emulsified asphalt fog seal. Construction and Building Materials. 2021; 301 ():124106.
Chicago/Turabian StyleFuqiang Liu; Mulian Zheng; Xia Liu; Xiaoyan Ding; Fei Wang; Qianqian Wang. 2021. "Performance evaluation of waterborne epoxy resin-SBR composite modified emulsified asphalt fog seal." Construction and Building Materials 301, no. : 124106.
As a common preventive maintenance technique for asphalt pavement, micro-surface (MS) has the advantages of waterproofing and crack sealing. However, issues such as the fact that the conventional MS generates large noise and the evaluation of the indexes of tire-road noise are relatively less studied. The traditional surface texture index cannot reveal the range and distribution of pavement surface texture, thus hindering research of low-noise MS. To study the mechanism of tire-road noise generated by MS, and propose the tire-road noise and surface texture indicators for MS. In this study, the mechanism of five low-noise MS was systematically analyzed and compared through surface texture and noise tests. Then, a three-dimensional digital texture model (3D-DTM) of MS surface texture was constructed using a series of digital image processing techniques, including grayscale identification, binary conversion, and noise reduction. The results show that optimizing the gradation, adding sound-absorbing materials, and improving the workability of construction can improve the noise reduction performance of MS, it is worth mentioning that the MS prepared with sound-absorbing materials and low-noise gradation has the greatest noise reduction effect, with a maximum reduction of 6.3 dB(A). In addition, it was also found that the 3D-DTM can well reflect the surface texture characteristics of MS. The probability of convex peak distribution (PCD) and the proportion of convex peak area (PCA) with peak heights greater than 0.25 mm (K h ≥ 0.25 ), which are extracted from the 3D-DTM, can well reflect the surface texture, tire-road noise, respectively. The results show that the 3D-DTM is a promising tool to optimize the design of low-noise MS.
Wang Chen; Mulian Zheng; Haiyang Wang. Evaluating the Tire/Pavement Noise and Surface Texture of Low-Noise Micro-Surface Using 3D Digital Image Technology. Frontiers in Materials 2021, 8, 1 .
AMA StyleWang Chen, Mulian Zheng, Haiyang Wang. Evaluating the Tire/Pavement Noise and Surface Texture of Low-Noise Micro-Surface Using 3D Digital Image Technology. Frontiers in Materials. 2021; 8 ():1.
Chicago/Turabian StyleWang Chen; Mulian Zheng; Haiyang Wang. 2021. "Evaluating the Tire/Pavement Noise and Surface Texture of Low-Noise Micro-Surface Using 3D Digital Image Technology." Frontiers in Materials 8, no. : 1.
Micro-surfacing is an effective preventive maintenance measurement. This paper introduces a new micro-surfacing with binder of Waterborne Epoxy Resin-SBR Compound Modified Emulsified Asphalt (WER-SCMEA) to overcome the common distresses, such as wear, rutting, aging, poor water stability, etc. The pavement performance and durability were investigated and compared with Styrene Butadiene Rubber (SBR) modified emulsified asphalt micro-surfacing by a series of laboratory tests. Results show that the WER-SCMEA micro-surfacing has good pavement performance, such as good high temperature rutting resistance, interlaminar shear resistance, anti-slide and waterproof performance. Besides, the WER-SCMEA micro-surfacing has good durability, such as good wear resistance, aging resistance and water stability. The good performance of WER-SCMEA micro- surfacing could alleviate the damages in the condition of long-term water immersion and freeze–thaw cycles greatly.
Fuqiang Liu; Mulian Zheng; Xianpeng Fan; Hongyin Li; Fei Wang. Performance evaluation of waterborne epoxy resin-SBR compound modified emulsified asphalt micro-surfacing. Construction and Building Materials 2021, 295, 123588 .
AMA StyleFuqiang Liu, Mulian Zheng, Xianpeng Fan, Hongyin Li, Fei Wang. Performance evaluation of waterborne epoxy resin-SBR compound modified emulsified asphalt micro-surfacing. Construction and Building Materials. 2021; 295 ():123588.
Chicago/Turabian StyleFuqiang Liu; Mulian Zheng; Xianpeng Fan; Hongyin Li; Fei Wang. 2021. "Performance evaluation of waterborne epoxy resin-SBR compound modified emulsified asphalt micro-surfacing." Construction and Building Materials 295, no. : 123588.
Preventive maintenance (PM) is regarded as the most economical maintenance strategy for asphalt pavement, but the life cycle environmental impacts (LCEI) of different PM techniques have not yet been comprehensively assessed and compared, thus hindering sustainable PM planning. This study aims to comprehensively estimate and compared the LCEI of five PM techniques then propose measures to reduce environmental impacts in PM design by using life cycle assessment (LCA), including fog seal with sand, micro-surfacing, composite seal, ultra-thin asphalt overlay, and thin asphalt overlay. Afterwards, ten kinds of LCEI categories and energy consumption of PM techniques were compared from the LCA phases, and inventory inputs perspectives, respectively. Results show that fog seal with sand and micro-surfacing can lower all LCEI scores by more than 50%. The environmental performance of five PM techniques provided by sensitivity analysis indicated that service life may not create significant impact on LCA results to some extent. Moreover, four PM combination plans were developed and compared for environmental performance, and results show that the PM plan only includes seal coat techniques that can reduce the total LCEI by 7–29% in pavement life. Increasing the frequency of seal coat techniques can make the PM plans more sustainable.
Mulian Zheng; Wang Chen; Xiaoyan Ding; Wenwu Zhang; Sixin Yu. Comprehensive Life Cycle Environmental Assessment of Preventive Maintenance Techniques for Asphalt Pavement. Sustainability 2021, 13, 4887 .
AMA StyleMulian Zheng, Wang Chen, Xiaoyan Ding, Wenwu Zhang, Sixin Yu. Comprehensive Life Cycle Environmental Assessment of Preventive Maintenance Techniques for Asphalt Pavement. Sustainability. 2021; 13 (9):4887.
Chicago/Turabian StyleMulian Zheng; Wang Chen; Xiaoyan Ding; Wenwu Zhang; Sixin Yu. 2021. "Comprehensive Life Cycle Environmental Assessment of Preventive Maintenance Techniques for Asphalt Pavement." Sustainability 13, no. 9: 4887.
The purpose of this study was to improve the problems of inadequate storage stability and insufficient high-temperature rutting resistance of crumb rubber-modified asphalt (CRMA) by adding nano-SiO2 and pre-oxidizing crumb rubber (CR). Hydrogen peroxide (H2O2) and sodium hypochlorite (NaClO) were used to oxidize the CR. The results indicated that the CR obtained the optimum oxidization effect in 30 mL H2O2 solution at 80 °C for 2 h under the catalysis of ferrous sulfate (FeSO4). Besides, oxidation treatment of the CR significantly improved the storage stability and high-temperature properties of the CR/nano-SiO2 composite-modified asphalt.
Yumei Liu; Mulian Zheng; Yueming Zhu; Linlin Zhu; Hongyin Li; Peng Liu. Preparation and performance of oxidized crumb rubber (OCR)/nano-SiO2 composite-modified asphalt. Construction and Building Materials 2021, 279, 122488 .
AMA StyleYumei Liu, Mulian Zheng, Yueming Zhu, Linlin Zhu, Hongyin Li, Peng Liu. Preparation and performance of oxidized crumb rubber (OCR)/nano-SiO2 composite-modified asphalt. Construction and Building Materials. 2021; 279 ():122488.
Chicago/Turabian StyleYumei Liu; Mulian Zheng; Yueming Zhu; Linlin Zhu; Hongyin Li; Peng Liu. 2021. "Preparation and performance of oxidized crumb rubber (OCR)/nano-SiO2 composite-modified asphalt." Construction and Building Materials 279, no. : 122488.
Permeable pavement (PP) can be used to decrease urban surface runoff. However, few studies have been conducted to explore the runoff reduction effect of various structures of PP in the carriageway. In this study, several structures of PP used in the carriageway of sponge cities in China were investigated and divided into three types: surface drainage, base course storage and drainage, and fully permeable. Then, the runoff models were developed by Storm Water Management Model to simulate the effect of the three types under various rainfall recurrence periods. Results show that rainfall recurrence period, structure and thickness of the permeable layer were identified as the most influential factors in PP runoff reduction. The surface drainage can reduce total runoff depth and coefficient by more than 14%, and also delay runoff start time and duration by more than 40 minutes. Surface runoff in the base course storage and drainage can only be generated when recurrence period is 50 years. The fully permeable does not generate any runoff under all recurrence periods. Based on simulation results, a series of runoff coefficient values for PP were recommended to help the design and implementation of PP in mitigating urban waterlogging problems.
Wang Chen; Mulian Zheng; Qian Gao; Chaoxian Deng; Yue Ma; Guoqiang Ji. Simulation of surface runoff control effect by permeable pavement. Water Science and Technology 2021, 83, 948 -960.
AMA StyleWang Chen, Mulian Zheng, Qian Gao, Chaoxian Deng, Yue Ma, Guoqiang Ji. Simulation of surface runoff control effect by permeable pavement. Water Science and Technology. 2021; 83 (4):948-960.
Chicago/Turabian StyleWang Chen; Mulian Zheng; Qian Gao; Chaoxian Deng; Yue Ma; Guoqiang Ji. 2021. "Simulation of surface runoff control effect by permeable pavement." Water Science and Technology 83, no. 4: 948-960.
The objective of this paper is to investigate the properties and mechanism of Waterborne Epoxy Resin-SBR Composite Modified Emulsified Asphalt (WER-SCMEA), which can be used as the binder of micro-surfacing. The properties of WER-SCMEA were investigated by a series of laboratory tests. The mechanism was analyzed by the fluorescence microscope and Infrared Spectroscopy. Results show that the Waterborne Epoxy Resin (WER) can improve the performance of SBR modified emulsified asphalt effectively, such as the thermal stability and adhesion. Besides, the WER system (WER and curing agent) has good dispersion and it is dispersed in asphalt evenly. However, the low temperature performance is weak. The strength mechanism of WER-SCMEA is the comprehensive effects of curing reaction, physical intertwine and chemical cross-linking reaction. Therefore, it can be concluded that the WER-SCMEA has good properties and stability.
Fuqiang Liu; Mulian Zheng; Xianpeng Fan; Hongyin Li; Fei Wang; Xiaoyu Lin. Properties and mechanism of waterborne epoxy resin-SBR composite modified emulsified asphalt. Construction and Building Materials 2020, 274, 122059 .
AMA StyleFuqiang Liu, Mulian Zheng, Xianpeng Fan, Hongyin Li, Fei Wang, Xiaoyu Lin. Properties and mechanism of waterborne epoxy resin-SBR composite modified emulsified asphalt. Construction and Building Materials. 2020; 274 ():122059.
Chicago/Turabian StyleFuqiang Liu; Mulian Zheng; Xianpeng Fan; Hongyin Li; Fei Wang; Xiaoyu Lin. 2020. "Properties and mechanism of waterborne epoxy resin-SBR composite modified emulsified asphalt." Construction and Building Materials 274, no. : 122059.
The differential settlement of short subgrade between two highway structures (bridges, tunnels, culverts, etc.) is significantly greater than that of the other subgrade for the insufficient compaction of short subgrade owing to limited construction site. This paper aims to establish the control criteria to prevent bump at bridge approach for differential settlement of short subgrade with oblique prestressed concrete overlying asphalt layer (AC + OPC) composite pavement. In this work, the short subgrade and AC + OPC composite pavement were defined. Meanwhile, the driving comfort was analysed and the control criteria for differential settlement of short subgrade with different lengths were obtained based on the driving comfort using the driving comfort test. Finally, the effects of different layer parameters on stress and deflection were investigated and the control criteria for differential settlement of short subgrade were established based on the void area beneath the slab using the finite element software ANSYS. Results show that the length of short subgrade between two highway structures is defined to be less than 200 m. The vehicle speed and longitudinal slope have significant effects on the vertical acceleration. The asphalt layer modulus, OPC layer thickness and modulus, base layer thickness and modulus, and foundation modulus have effects on the flexural stress and deflection, especially the OPC layer thickness. The relationship between the additional stress and void area beneath the slab is derived. In addition, the control criteria for differential settlement of short subgrade with different lengths are put forward based on the void area beneath the slab and driving comfort. The application of AC + OPC composite pavement can prevent bump at bridge approach of short subgrade effectively. The results of this paper can provide guidance for the application of AC + OPC composite pavement.
Fuqiang Liu; Mulian Zheng; Tao Wang; Shuai Wang; Linlin Zhu. Studying Bump at Bridge Approach of Short Subgrade with Oblique Prestressed Concrete Overlaying Asphalt Layer. Advances in Materials Science and Engineering 2020, 2020, 1 -14.
AMA StyleFuqiang Liu, Mulian Zheng, Tao Wang, Shuai Wang, Linlin Zhu. Studying Bump at Bridge Approach of Short Subgrade with Oblique Prestressed Concrete Overlaying Asphalt Layer. Advances in Materials Science and Engineering. 2020; 2020 ():1-14.
Chicago/Turabian StyleFuqiang Liu; Mulian Zheng; Tao Wang; Shuai Wang; Linlin Zhu. 2020. "Studying Bump at Bridge Approach of Short Subgrade with Oblique Prestressed Concrete Overlaying Asphalt Layer." Advances in Materials Science and Engineering 2020, no. : 1-14.
This paper aims to develop a new kind of powder geopolymer grouting material (S-F powder Geopolymer) and investigate the properties. The slag powder, fly ash, alkali activators A and B, chemical additive, reinforcing material and water were employed to prepare this material. The single factor and orthogonal tests were conducted to study the composition of S-F powder Geopolymer. The physical and mechanical properties were evaluated by a series of laboratory tests such as fluidity, bleeding and expansion rate, mechanical properties tests et al. The results show that the optimum formula of S-F powder Geopolymer is that slag powder to fly ash is 80:20, the alkali activators A and B are 8% and 6.5%, the reinforcing material is 9% and the water reducing agent is 1%. In addition, the S-F powder Geopolymer has good physical and mechanical properties, which can ensure the performance of road repaired by this material. The S-F powder Geopolymer can be used to fill void beneath cement pavement slab and to repair crack of cement-stabilized base of asphalt pavement. The results of this paper will help the practice to have better understanding on the powder geopolymer grouting material and give recommendations to guide future field application of this material.
Fuqiang Liu; Mulian Zheng; Yanshi Ye. Formulation and properties of a newly developed powder geopolymer grouting material. Construction and Building Materials 2020, 258, 120304 .
AMA StyleFuqiang Liu, Mulian Zheng, Yanshi Ye. Formulation and properties of a newly developed powder geopolymer grouting material. Construction and Building Materials. 2020; 258 ():120304.
Chicago/Turabian StyleFuqiang Liu; Mulian Zheng; Yanshi Ye. 2020. "Formulation and properties of a newly developed powder geopolymer grouting material." Construction and Building Materials 258, no. : 120304.
Cracking is one of the main forms of damage to asphalt pavement. The self-healing process of asphalt pavement is the inverse process of crack formation and development. Strengthening the self-healing ability of asphalt materials could restrain cracking and prolong the service life of asphalt pavement. Microcapsule self-healing technology has achieved good results in the field of microcrack repair and has promising research prospects. In this study, two kinds of microcapsules, CA-mic and E-mic, were prepared by in situ polymerization with a self-developed rejuvenator CA and modified epoxy resin as core materials. The micromorphology, thermal stability and chemical structure of the microcapsules were characterized by fluorescence microscopy (FM), scanning electron microscopy (SEM), laser particle size analyzer (LPSA), thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR). The freeze-heating cycle test was adopted to evaluate the durability of the microcapsules. The results showed that the two prepared microcapsules were spherical in shape and uniform in particle size distribution, with compact encapsulation and good durability. Additionally, they could survive under high temperature during asphalt construction. The rheological test of bending beams showed that the low temperature crack resistance of asphalt was improved after adding two kinds of microcapsules. The “Fracture - Healing- Fracture” tests showed that the two microcapsules could enhance the self-healing ability of the asphalt, and the maximum self-healing rate of the CA-mic could reach 52% and that of the E-mic could reach 47%.
Yanjuan Tian; Mulian Zheng; Peng Li; Jinhao Zhang; Ruizhe Qiao; Cheng Cheng; Hailei Xu. Preparation and characterization of self-healing microcapsules of asphalt. Construction and Building Materials 2020, 263, 120174 .
AMA StyleYanjuan Tian, Mulian Zheng, Peng Li, Jinhao Zhang, Ruizhe Qiao, Cheng Cheng, Hailei Xu. Preparation and characterization of self-healing microcapsules of asphalt. Construction and Building Materials. 2020; 263 ():120174.
Chicago/Turabian StyleYanjuan Tian; Mulian Zheng; Peng Li; Jinhao Zhang; Ruizhe Qiao; Cheng Cheng; Hailei Xu. 2020. "Preparation and characterization of self-healing microcapsules of asphalt." Construction and Building Materials 263, no. : 120174.
The energy consumption and greenhouse gas emission of asphalt pavement have become a very serious global problem. The high-temperature stability and durability of polyurethane (PU) are very good. It is studied as an alternative binder for asphalt recently. However, the strength-forming mechanism and the mixture structure of the PU mixture are different from the asphalt mixture. This work explored the design and performance evaluation of the PU mixture. The PU content of mixtures was determined by the creep slope (K), tensile strength ratios (TSR), immersion Cantabro loss (ICL), and the volume of air voids (VV) to ensure better water stability. The high- and low-temperature stability, water stability, dynamic mechanical property, and sustainability of the PU mixture were evaluated and compared with those of the stone matrix asphalt mixture (SMA). The test results showed that the dynamic stability and bending strain of the PU mixture were about 7.5 and 2.3 times of SMA. The adhesion level of PU and the basalt aggregate was one level greater than the limestone, and basalt aggregates were proposed to use in the PU mixture to improve water stability. Although the initial TSR and ICL of PU mixture were lower, the long-term values were higher; the PUM had better long-term water damage resistance. The dynamic modulus and phase angles (φ) of the PU mixture were much higher. The energy consumption and CO2 emission of the PU mixture were lower than those of SMA. Therefore, the cold-mixed PU mixture is a sustainable material with excellent performance and can be used as a substitute for asphalt mixture.
Sun Min; Yufeng Bi; Mulian Zheng; Sai Chen; Jingjing Li. Evaluation of a Cold-Mixed High-Performance Polyurethane Mixture. Advances in Materials Science and Engineering 2019, 2019, 1 -12.
AMA StyleSun Min, Yufeng Bi, Mulian Zheng, Sai Chen, Jingjing Li. Evaluation of a Cold-Mixed High-Performance Polyurethane Mixture. Advances in Materials Science and Engineering. 2019; 2019 ():1-12.
Chicago/Turabian StyleSun Min; Yufeng Bi; Mulian Zheng; Sai Chen; Jingjing Li. 2019. "Evaluation of a Cold-Mixed High-Performance Polyurethane Mixture." Advances in Materials Science and Engineering 2019, no. : 1-12.
The objective of this study is to develop a highly permeable rejuvenating agent for the recycling of the asphalt pavement. The rheological properties and permeability of recycled asphalt after adding the self-developed rejuvenating agent, as well as two other agents, were compared and evaluated. An improved softening point method was devised to evaluate the permeability. In addition, the recycled asphalt was analyzed using Fourier transform infrared spectroscopy (FTIR). The results showed that the self-developed rejuvenating agent had high permeability, could effectively restore the performance of the aged asphalt, and could improve the aging-resistant property of the recycled asphalt. FTIR analysis showed that the matrix asphalt experienced oxygen absorption and dehydrogenation during the aging process. The aging of the SBS-modified asphalt was achieved via dual aging of the matrix asphalt and SBS-modified components. In addition, the rejuvenating agent CA had an inhibitory effect on asphalt aging, and its recycling efficiency was better than that of the rejuvenating agent A for the aged SBS-modified asphalt. Finally, a relationship between the microscopic functional group index and the macroscopic test index was established.
Yanjuan Tian; Mulian Zheng; Hailei Xu; Chupeng Chen; Jinhao Zhang. Comparison and Analysis of the Performances and Mechanisms of Recycled Asphalt Incorporating High-Permeability Rejuvenating Agent. Advances in Civil Engineering 2019, 2019, 1 -16.
AMA StyleYanjuan Tian, Mulian Zheng, Hailei Xu, Chupeng Chen, Jinhao Zhang. Comparison and Analysis of the Performances and Mechanisms of Recycled Asphalt Incorporating High-Permeability Rejuvenating Agent. Advances in Civil Engineering. 2019; 2019 ():1-16.
Chicago/Turabian StyleYanjuan Tian; Mulian Zheng; Hailei Xu; Chupeng Chen; Jinhao Zhang. 2019. "Comparison and Analysis of the Performances and Mechanisms of Recycled Asphalt Incorporating High-Permeability Rejuvenating Agent." Advances in Civil Engineering 2019, no. : 1-16.
The inconsistences of the higher-order shear resultant expressed in terms of displacement(s) and the complete boundary value problems of structures modeled by the nonlocal strain gradient theory have not been well addressed. This paper develops a size-dependent Timoshenko beam model that considers both the nonlocal effect and strain gradient effect. The variationally consistent boundary conditions corresponding to the equations of motion of Timoshenko beams are reformulated with the aid of the weighted residual method. The complete boundary value problems of nonlocal strain gradient Timoshenko beams undergoing buckling are solved in closed forms. All the possible higher-order boundary conditions induced by the strain gradient are selectively suggested based on the fact that the buckling loads increase with the increasing aspect ratios of beams from the conventional mechanics point of view. Then, motivated by the expression for beams with simply-supported (SS) boundary conditions, some semiempirical formulae are obtained by curve fitting procedures.
Xiaojian Xu; Mulian Zheng. Analytical solutions for buckling of size-dependent Timoshenko beams. Applied Mathematics and Mechanics 2019, 40, 953 -976.
AMA StyleXiaojian Xu, Mulian Zheng. Analytical solutions for buckling of size-dependent Timoshenko beams. Applied Mathematics and Mechanics. 2019; 40 (7):953-976.
Chicago/Turabian StyleXiaojian Xu; Mulian Zheng. 2019. "Analytical solutions for buckling of size-dependent Timoshenko beams." Applied Mathematics and Mechanics 40, no. 7: 953-976.
The heat-reflective coating for asphalt pavement is a functional layer applied on pavement surfaces to reduce heat storage in the pavement via reflecting sunlight, thus inhibiting pavement temperature rise. The objective of this study was to analyze the environmental thermal effect of the self-developed reflective coating, namely, functionally graded nanocomposite reflective coatings, for asphalt pavement. The thermal effects of heat-reflective coatings were compared and analyzed based on field tests. A heating model of the atmosphere layer near the road surface was established. Moreover, the influence of urban road temperature on the thermal comfort of the human body was analyzed. Results showed that the radiation heat of all heat-reflective coatings decreased around two-thirds, and the convective heat decreased nearly 50% when compared with the control asphalt pavement, and the temperatures of the pavement itself and the atmosphere layer were lowered. Additionally, the heat-reflective coating improved the thermal comfort of the human body. This indicated that the heat-reflective coating reduced ambient temperate and relieved the urban heat island effect (UHI) as well as improved the environmental thermal effect.
Mulian Zheng; Yanjuan Tian; Litao He. Analysis on Environmental Thermal Effect of Functionally Graded Nanocomposite Heat Reflective Coatings for Asphalt Pavement. Coatings 2019, 9, 178 .
AMA StyleMulian Zheng, Yanjuan Tian, Litao He. Analysis on Environmental Thermal Effect of Functionally Graded Nanocomposite Heat Reflective Coatings for Asphalt Pavement. Coatings. 2019; 9 (3):178.
Chicago/Turabian StyleMulian Zheng; Yanjuan Tian; Litao He. 2019. "Analysis on Environmental Thermal Effect of Functionally Graded Nanocomposite Heat Reflective Coatings for Asphalt Pavement." Coatings 9, no. 3: 178.
An innovative approach for characterizing the fatigue character of high modulus asphalt concrete (HMAC) and matrix asphalt concrete was presented. Strain-life fatigue equations based on uniaxial tensile test are employed to extract parameters characteristic of the asphalt concrete's resistance to fatigue. The feasible test conditions including specimen size, failure criterion, control mode, loading frequency and test temperature are proposed. In addition, the effect of the mean stress on the fatigue life is analyzed that mean stress has minor influence on fatigue life evaluation. Fatigue strain threshold, limit strain and fatigue life equation are put forward based on the fatigue test results at different strain levels. Such fatigue equation as well as tensile strain threshold and limit value can guide the development of the two asphalt mixtures, which can estimate the lifetime of load-bearing structures. From the fatigue character comparison between the two asphalt mixtures, tensile strain threshold and limit tensile strain of HMAC are smaller than those of matrix asphalt concrete, and HMAC can better resist the fatigue damage than matrix asphalt concrete.
Mulian Zheng; Peng Li; Jiangang Yang; Hongyin Li; Yangyang Qiu; Zhengliang Zhang. Fatigue character comparison between high modulus asphalt concrete and matrix asphalt concrete. Construction and Building Materials 2019, 206, 655 -664.
AMA StyleMulian Zheng, Peng Li, Jiangang Yang, Hongyin Li, Yangyang Qiu, Zhengliang Zhang. Fatigue character comparison between high modulus asphalt concrete and matrix asphalt concrete. Construction and Building Materials. 2019; 206 ():655-664.
Chicago/Turabian StyleMulian Zheng; Peng Li; Jiangang Yang; Hongyin Li; Yangyang Qiu; Zhengliang Zhang. 2019. "Fatigue character comparison between high modulus asphalt concrete and matrix asphalt concrete." Construction and Building Materials 206, no. : 655-664.
Polymer modified asphalts are used to improve the performances of asphalt pavements. However, storage stability and aging performance need to be improved. Therefore, in this study, we focused on assessing the characteristics of polyurethane (PU), base or styrene-butadiene-styrene (SBS) modified asphalt and its mixtures. Polyurethane modified asphalt was prepared using a disk-based serrated mixer. The basic technical index tests of the selected asphalts were performed and bending beam rheometer (BBR), dynamic shear rheometer (DSR), Fourier transform infrared spectroscopy (FTIR) and dynamic mechanical analysis (DMA) were conducted. The property tests of the three asphalt mixtures were also performed. In addition, the approximate capital costs of PU modified asphalt mixtures were calculated. Results of this work demonstrated the high temperature and water resistance of PU modified asphalt. However, PU modified asphalt mixture had a lower low-temperature resistance than SBS modified asphalt, but greater than base asphalt. PU modified asphalt mixture performed excellent water stability and non-deformability. The optimal asphalt content of PU modified asphalt mixture was lower than other asphalt mixtures by 5%. The cost of PU modified asphalt mixtures was similar to that of SBS modified asphalt, indicating that it was a cost-effective material.
Min Sun; Mulian Zheng; GuangZhen Qu; Kun Yuan; Yufeng Bi; Jian Wang. Performance of polyurethane modified asphalt and its mixtures. Construction and Building Materials 2018, 191, 386 -397.
AMA StyleMin Sun, Mulian Zheng, GuangZhen Qu, Kun Yuan, Yufeng Bi, Jian Wang. Performance of polyurethane modified asphalt and its mixtures. Construction and Building Materials. 2018; 191 ():386-397.
Chicago/Turabian StyleMin Sun; Mulian Zheng; GuangZhen Qu; Kun Yuan; Yufeng Bi; Jian Wang. 2018. "Performance of polyurethane modified asphalt and its mixtures." Construction and Building Materials 191, no. : 386-397.
The objectives of the present study are to investigate the anti-skid performance of concrete pavement and to attempt to enhance its durability by two different methods: using a longitudinally-transversely grooved (LT) form, and using a self-developed composite curing agent containing paraffin and Na2SiO3 as the main ingredients. The friction coefficient (μ) was measured by self-developed equipment to evaluate the anti-skid performance of samples with three different groove forms (LT, longitudinally grooved (L), and transversely grooved (T)). Abrasion tests were then carried out to evaluate the durability of the anti-skid performance. The results indicated that anti-skid performance of LT samples was approximately 46.2% greater than that of T samples, but its durability was not as significant as that of T samples. However, the resistance to abrasion could be improved by using the aforementioned curing agent. Comparisons were carried out between samples sprayed the curing agent and control samples without any curing agent under standard conditions. It was found that the application of the curing agent increased the anti-skid durability of concrete by 35.4%~47.8%, proving it to be a useful and promising technique.
Mulian Zheng; Yanjuan Tian; Xiaoping Wang; Ping Peng. Research on Grooved Concrete Pavement Based on the Durability of Its Anti-Skid Performance. Applied Sciences 2018, 8, 891 .
AMA StyleMulian Zheng, Yanjuan Tian, Xiaoping Wang, Ping Peng. Research on Grooved Concrete Pavement Based on the Durability of Its Anti-Skid Performance. Applied Sciences. 2018; 8 (6):891.
Chicago/Turabian StyleMulian Zheng; Yanjuan Tian; Xiaoping Wang; Ping Peng. 2018. "Research on Grooved Concrete Pavement Based on the Durability of Its Anti-Skid Performance." Applied Sciences 8, no. 6: 891.
Thiopve asphalt mixture has the advantages of reducing construction temperature, saving asphalt consumption and improving high temperature stability. The formula substitution method is used to calculate the optimum binder amount and the optimum asphalt content of different grading types and different Thiopve mixture. And through the rutting test, low-temperature bending and freeze-thaw splitting tests to evaluate the performance of various asphalt mixtures comprehensively, on the basis of analysis of the test data, various types of asphalt mixture suitable for the climate zone nce modulus and Thiopve asphalt mixture with different content and different grading types are given. It provides suggested. Combined with uniaxial compression test (Cylinder method), the regression equation of compressive resiliees a reference for the selection of design parameters when Thiopve asphalt mixture is popularized and used.
Min Sun; GuangZhen Qu; Mulian Zheng. Study on performance and design parameters of Thiopve asphalt mixture with different content. INTERNATIONAL CONFERENCE ON CIVIL, MECHANICAL AND MATERIAL ENGINEERING: ICCMME 2018 2018, 1973, 020017 .
AMA StyleMin Sun, GuangZhen Qu, Mulian Zheng. Study on performance and design parameters of Thiopve asphalt mixture with different content. INTERNATIONAL CONFERENCE ON CIVIL, MECHANICAL AND MATERIAL ENGINEERING: ICCMME 2018. 2018; 1973 (1):020017.
Chicago/Turabian StyleMin Sun; GuangZhen Qu; Mulian Zheng. 2018. "Study on performance and design parameters of Thiopve asphalt mixture with different content." INTERNATIONAL CONFERENCE ON CIVIL, MECHANICAL AND MATERIAL ENGINEERING: ICCMME 2018 1973, no. 1: 020017.
This paper presents a quantitative estimation of anti-icing asphalt mixture snow-melting performance and provides the application guidance for the mixture under study. The regression model of snowmelt quality evolution was established and experimentally verified for different values of snowfall intensity, temperature and blending content of anti-icing filler. The deicing performance of anti-icing asphalt mixtures was evaluated via the impact load tests. The results obtained indicate that the application temperatures of the anti-icing asphalt mixture should exceed −10 °C for moderate or light snow conditions and exceed 0 °C for heavy or blizzard snow conditions. A linear dependence between the snowmelt quality of anti-icing asphalt mixture and time is observed for all tested values of snowfall intensity and temperature. On the other hand, under the same snowfall intensity conditions, a two- to threefold increase of the melting rate with temperature is observed. The available records for the last 30 years in different regions under study concerning variation ranges of three meteorological factors (namely, the extremely minimum temperature, snowfall intensity and the coldest month’s average temperature), the most suitable temperature for application of anti-icing asphalt pavement was identified for each particular region.
Mulian Zheng; Shujuan Wu; Chongtao Wang; Yifeng Li; Zonghui Ma; Lei Peng. A Study on Evaluation and Application of Snowmelt Performance of Anti-Icing Asphalt Pavement. Applied Sciences 2017, 7, 583 .
AMA StyleMulian Zheng, Shujuan Wu, Chongtao Wang, Yifeng Li, Zonghui Ma, Lei Peng. A Study on Evaluation and Application of Snowmelt Performance of Anti-Icing Asphalt Pavement. Applied Sciences. 2017; 7 (6):583.
Chicago/Turabian StyleMulian Zheng; Shujuan Wu; Chongtao Wang; Yifeng Li; Zonghui Ma; Lei Peng. 2017. "A Study on Evaluation and Application of Snowmelt Performance of Anti-Icing Asphalt Pavement." Applied Sciences 7, no. 6: 583.