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Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 1118-1125页

作者： LIAO Jun DENG Tao GONG Hongwei LI Zhen TANG Yongtao CHEN Kai SHI Lei QIAN Xiaolong DONG Qian College of Environment and Civil Engineering Chengdu University of TechnologyChengdu 610059China

This study aims to investigate the efiect of the mesoscopic characteristics of mineral powder fillers on the rutting resistance of asphalt *** and sieving tests were used to obtain the buton rock asphalt(BRA)ash with particle size smaller than 0.075 mm,which is consistent with that of the conventional mineral *** mesoscopic characteristics of BRA ash and conventional mineral powder were measured by SEM image analysis and the osmotic free pressure water *** structure models of structural and free asphalts in mortar were *** 70#matrix asphalt was used to prepare two kinds of asphalt mortar with BRA ash and conventional mineral powders *** rutting factor of the two asphalt mortars was tested by dynamic shear test(DSR).Test results show that the ash extracted from BRA has a similar mesoscopic classification with the conventional mineral ***,its fractal dimensions are larger,indicating the particles in BRA ash have more complex shapes and rougher surfaces,which is beneficial for forming structural asphalt and subsequently increasing the rutting factor(G*/sinδ),i e,improving the rutting resistance of the asphalt mortar.

关键词： asphalt mortar mineral powder fllers mesoscopic characteristic rutting factor(G*/sinδ)

The Research for Surface Properties of Steel Slag Powder and High-Temperature Rheological Properties of asphalt mortar

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Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 1096-1104页

作者： WANG Yefei YUAN Yan YANG Lihong LIU Yong CHEN Yiwen College of Civil Engineering Fuzhou UniversityFuzhou 350108China Fujian Road&Bridge Construction Co. LtdFuzhou 350108China

In order to evaluate the feasibility of steel slag powder as filler,the coating properties of steel slag and limestone aggregate were compared by water boiling test,the micro morphology difierences between steel slag powder and mineral powder(limestone powder)were compared by scanning electron microscope(SEM),and the high-temperature rheological properties of asphalt mortar with difierent ratio of filler quality to asphalt quality(F/A)and difierent substitution rates of mineral powder(S/F)were studied by dynamic shear rheological *** results show that the surface microstructure of steel slag powder is more abundant than that of mineral powder,and the adhesion of steel slag to asphalt is better than that of *** the same temperature,the lower the ratio of S/F is,the greater the rutting factor and complex modulus will *** addition,the complex modulus and rutting factor of the asphalt mortar increase with the increase of F/A,and the filler type and F/A have a negligible efiect on the phase angle.

关键词： steel slag powder asphalt mortar microcosmic adhesion high-temperature rheological properties

Stabilizing and reinforcing effects of different fibers on asphalt mortar performance

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Petroleum Science 2015年第1期12卷 189-196页

作者： Meng-Meng Wu Rui Li Yu-Zhen Zhang Liang Fan Yu-Chao Lv Jian-Ming Wei State Key Laboratory of Heavy Oil Processing China University of Petroleum (East China)

Physical properties of different fibers （mineral, cellulose, or carbon fiber） and their stabilizing and reinforcing effects on asphalt mortar performance were studied. Scanning electron microscopy was used to study the effect of fiber＇s microstructure on asphalt mortar＇s performance. Laboratory tests of mesh-basket draindown and oven heating were designed and performed to evaluate the fibers＇ asphalt absorption and thermostability. A cone penetration test was used to study the flow resistance of fiber-modified asphalt mortar. Results showed that fiber can form a three-dimensional network structure in asphalt, and this network can be retained at high temperature. This network of fibers favors the formation of a thick coating of mastic without asphalt draining down. Cellulose fiber possessed a greater effect on asphalt absorption and sta- bilization than did the other fibers （mineral and carbon fiber）. A dynamic shear rheometer was used to evaluate their rheological properties and rut resistance. Results indicated that fiber can effectively improve the rut and flow resistance of asphalt mortar. However, the bending beam rheometer results demonstrated that the addition of fiber had negative effects on the creep stiffness and creep rate of asphalt mortar.

关键词： Fiber asphalt mortar SEM Rheology Mechanical properties

Influence of limestone fillers on combustion characteristics of asphalt mortar for pavements

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Chinese Physics B 2014年第7期23卷 494-498页

作者：吴珂朱凯吴昊韩君王金昌黄志义梁培 College of Civil and Architecture Engineering Zhejiang University Department of Chemical and Biochemical Engineering Technical University of DenmarkS?ltofts PladsBuilding 229DK-2800 Kgs. LyngbyDenmark Jiangsu Bao Li asphalt Co. LTD College of Optical and Electronic Technology China Jiliang University

asphalt materials will be ignited and release significant toxic fumes within tunnel fires. Thus, combustion character- istics of asphalt materials used in road tunnel should be studied in order to limit such an adverse effect. In the present work we study the influence of limestone fillers on combustion characteristics of asphalt mortar by thermogravimetric and kinetic analysis. It is shown that the combustion of asphalt mortar is not just a linear superposition of asphalt and limestone. The limestone will increase the ignition point and the activation energy of the primary volatile release, and will catalyze the char formation from the primary volatile release. Kinetic analysis shows that the primary volatile release stage of asphalt mortar combustion can be explained by a three-dimensional diffusion model, the secondary volatile release and char combustion stage can be explained by a model under the assumption of random nucleation and nuclei growth, whereas the limestone decomposition stage appears to follow the one-dimensional phase boundary model.

关键词： asphalt mortar limestone combustion kinetic analysis

Reinforcement effect of fiber and deoiled asphalt on high viscosity rubber/SBS modified asphalt mortar

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Petroleum Science 2014年第3期11卷 454-459页

作者： Wu Mengmeng Li Rui Zhang Yuzhen Wei Jianming Lv Yuchao Ding Xuemei State Key Laboratory of Heavy Oil Processing China University of Petroleum (East China)

In this paper we investigate the reinforcement mechanism of high viscosity rubber/SBS modified asphalt mortar mixed with fiber （mineral, lignin or carbon fiber） and deoiled asphalt （DOA）. The softening point, penetration and viscosity tests were conducted to characterize the engineering properties of asphalt-fiber mortar. The microstructure of fiber was observed using scanning electron microscopy （SEM）, and the results indicated that fiber can effectively improve the toughness of asphalt matrix through forming a spatial network structure, and then adhesion and stabilization of asphalt binder. The cone penetration test was designed to study the rheological property of fiber modified asphalt. The results indicated that the reinforcement effect increased with fibers and DOA fraction increasing to a certain threshold, and the optimal fiber content was dependent on the fiber type and its length. Fiber content and filler-asphalt ratio had significant effects on the softening point, penetration, viscosity and cone penetration of asphalt mortar.

关键词： asphalt mortar fiber filler-asphalt ratio reinforcement mechanical property

Effects of Filler-asphalt Ratio on the Properties of Lignin and Polyester Fiber Reinforced SMPU/SBS Modified asphalt mortar

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Journal of Renewable Materials 2023年第8期11卷 3387-3402页

作者： Wenjing Xia Jinhui Wang Tao Xu Nan Jiang College of Civil Engineering Nanjing Forestry UniversityNanjing210037China College of Civil Engineering Yancheng Institute of TechnologyYancheng224051China

To understand the effects ofﬁller-asphalt ratio on different properties of lignin and polyesterﬁber reinforced shape memory polyurethane(SMPU)/styrene butadiene styrene(SBS)composite modiﬁed asphalt mortar(PSAM),as well as to reveal the reinforcing and toughening mechanisms of lignin and polyesterﬁbers on PSAM,SMPU,SBS and mineral powder wereﬁrst utilized to prepare *** the conventional,rheological and anti-cracking properties of ligninﬁber reinforced PSAM(LFAM)and polyesterﬁber reinforced PSAM(PFAM)at dif-ferentﬁller-asphalt ratios were *** results indicate that the shear strength,deformation resistance and viscosity are increased after adding 0.8wt%ligninﬁber or polyesterﬁber and increasing theﬁller-asphalt ratio from 0.8 to *** optimalﬁller-asphalt ratio of 1.0 is proposed after comprehensive performance assessments of ***ﬁber shows a better reinforcing effect than ligninﬁber,but its improvement in the thermal stability of PSAM is not signiﬁcant at high ***,the complex modulus,storage modulus,loss modulus and rutting resistance factor of PSAM are improved after adding ligninﬁber and polyesterﬁber,as well as show an increasing trend as theﬁller-asphalt ratio is raised,but the phase angle is gradually ***,the increase of elastic components in PSAM effectively enhances the anti-deformation ability of PSAM at high temperatures,and polyesterﬁber more obviously improves the high-temperature deformation resistance of PSAM than ligninﬁ***,the anti-cracking performance of PFAM and LFAM at low temperatures is reduced by 74.2%and 46.7%,respectively,as theﬁller-asphalt ratio is raised from 0.8 to *** low-temperature anti-cracking performance of LFAM is lower than that of PFAM at the sameﬁller-asphalt ratio,even lower than that of *** with ligninﬁber,the anti-cracking performance and deformation resistance of PSAM at low temperature is more greatly enhanced by polyester ﬁber.

关键词： asphalt mortar ﬁber reinforcement ﬁller-asphalt ratio anti-cracking performance high-temperature stability deformation resistance

Influence of filler-bitumen ratio on performance of modified asphalt mortar by additive

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Journal of Modern Transportation 2013年第1期21卷 40-46页

作者： Hongsheng Qiu Ximing Tan Shu Shi Heng Zhang School of Transportation Wuhan University of Technology

When the filler-bitumen ratio of asphalt mortar changes, its adhesion and viscoelasticity will also change, as well as its performance at the high and low temperatures, fatigue durability, and ductility. Thus, the appropriate fillerbitumen ratio directly affects the asphalt mortar＇s performance. This paper tested the physical indexes of the No. 70 matrix asphalt mortar modified by additive Sasobit （SB） and Sasowam （SW） through dynamic shear rheometer and bending beam rheometer under different temperature conditions, and comprehensively analyzed the high-temperature anti-rutting and fatigue performance, low-temperature crack resistance performance, and ductility of asphalt mortar. The results show that ore powder not only can increase the antirutting factor but also can increase the aging resistance of asphalt. SB has better performances than SW at high temperatures. As for the filler-bitumen ratio of asphalt mortar with additive SB, the recommended value is between 0.8 and 1.2, and the value may be a little larger for that with SW.

关键词： Filler-bitumen ratio asphalt mortar Anti-rutting factor Small beam specimens Creep rate

Experiment and simulation of creep performance of basalt fibre asphalt mortar under uniaxial compressive loadings

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Journal of Southeast University(English Edition) 2016年第4期32卷 472-478页

作者：张小元顾兴宇吕俊秀朱宗凯东南大学交通学院南京210096

The creep performance of basalt fibre（BF）reinforced in asphalt mortar under uniaxial compressive loadings is investigated. The samples of basalt fibre asphalt mortar（BFAM） with different BF mass fractions（0. 1%,0. 2%, and 0. 5%） and without BF in asphalt mixture are prepared, and then submitted for the compressive strength test and corresponding creep test at a high in-service ***, numerical simulations in finite element ABAQUS software were conducted to model the compressive creep test of mortar materials, where the internal structure of the fibre mortar was assumed to be a two-component composite material model such as fibre and mortar matrix. Finally, the influence factors of rheological behaviors of BFAM are further analyzed. Results indicate that compared to the control sample, the compressive strength of BFAM samples has a significant increase, and the creep and residual deformation are decreased. However, it also shows that the excessive fibre, i.e. with the BF content of 0. 5%, is unfavorable to the high-temperature stability of the mortar. Based on the analysis results, the prediction equations of parameters of the Burgers constitutive model for BFAM are proposed by considering the fibre factors.

关键词： basalt fibre asphalt mortar uniaxial compressive creep performance

Dynamic Mechanical Characterizations and Road Performances of Flame Retardant asphalt mortars and Concretes

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Journal of Wuhan University of Technology(Materials Science) 2015年第5期30卷 1036-1042页

作者：秦先涛 ZHU Siyue LI Zuzhong CHEN Shuanfa School of Highway Chang'an University School of Civil Engineering and Architecture Wuhan Polytechnic University School of Materials Science and Engineering Chang'an University Engineering Research Center of Transportation Materials of Ministry of Education Chang'an University

To research the dynamic mechanical properties and road performances of flame retardant asphalt mortars and mixtures, four different asphalt mortars/mixtures were prepared: a reference group and three asphalt mortars/mixtures containing composite flame retardant materials(M-FRs) of different proportions. Temperature sweep, frequency sweep, repeated creep test, force ductility test and bending beam rheological test were carried out to research the dynamic mechanical properties of asphalt mortars containing M-FRs; wheeltracking test, low-temperature bending test and freeze-thaw split test were used to study the road performances of asphalt mixtures containing M-FRs. The results show that high-temperature performances of the three flame retardant asphalt mortars improve greatly, while low-temperature cracking resistances decline. Both hightemperature performances and water stabilities of asphalt mixtures containing M-FRs are quite good and exceed the specification requirements. However, their low-temperature performances decline in different degrees. In summary, besides their good flame retardancy, the flame retardant asphalt mortars and mixtures also exhibit acceptable road performance.

关键词： asphalt mortar asphalt mixture composite flame retardant materials dynamic mechanical characterization road performance