This page has only limited features, please log in for full access.

Unclaimed
Xiyan Fan
National Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410114, China

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 15 December 2020 in Construction and Building Materials
Reads 0
Downloads 0

At present, many test methods and models have been used to evaluate the fatigue performance of pavement materials. However, different test methods and material types have a significant impact on the fatigue result evaluation. Thus, to evaluate the fatigue characteristics of different pavement materials under diverse test methods, the strength and fatigue performance of three pavement materials were characterized through direct tension, uniaxial compression, and indirect tensile tests at multiple loading rates and stress levels. In this paper, three pavement materials, such as SBS-modified asphalt mixture (SBS-MAM), crumb rubber asphalt mixtures (CRAM), and cement-stabilized macadam (CSM), were tested. On this basis, the strength yield surface models related to loading rates and the fatigue normalized unified model of three pavement materials under various stress states were established. Comparing the differences among the three pavement materials' fatigue performance, the results show that the fatigue results of the three pavement materials were completely different under dissimilar test methods. The conventional fatigue equation cannot evaluate the influence of specimen size and stress state on fatigue performance. However, the fatigue normalization model established in this paper can settle these problems. It is also clear that the fatigue performance of CSM is superior to those of the other two mixtures when the stress level is small. However, the fatigue life of CSM is significantly more sensitive to the stress level than those of the other two mixtures. Based on the establishment and comparative analysis of the normalized models of fatigue characteristics of different pavement materials, the scientific conversion of pavement material fatigue to structural fatigue is realized, which provides sights into the anti-fatigue design of pavement structures.

ACS Style

Songtao Lv; Peng Wang; Xiyan Fan; Milkos Borges Cabrera; Long Hu; Xinghai Peng; Chaochao Liu; Jiang Yuan. Normalized comparative study on fatigue characteristics of different pavement materials. Construction and Building Materials 2020, 271, 121907 .

AMA Style

Songtao Lv, Peng Wang, Xiyan Fan, Milkos Borges Cabrera, Long Hu, Xinghai Peng, Chaochao Liu, Jiang Yuan. Normalized comparative study on fatigue characteristics of different pavement materials. Construction and Building Materials. 2020; 271 ():121907.

Chicago/Turabian Style

Songtao Lv; Peng Wang; Xiyan Fan; Milkos Borges Cabrera; Long Hu; Xinghai Peng; Chaochao Liu; Jiang Yuan. 2020. "Normalized comparative study on fatigue characteristics of different pavement materials." Construction and Building Materials 271, no. : 121907.

Journal article
Published: 24 July 2019 in Materials
Reads 0
Downloads 0

To improve the low-temperature performance of the Buton rock asphalt (BRA)-modified asphalt, styrene-butadiene rubber (SBR) was added to it. The BRA-modified asphalt and SBR-BRA composite modified asphalt were prepared by high-speed shearing method. The penetration, softening point, ductility, and Brookfield viscosity of the two kinds of asphalt were measured. The dynamic shear rheometer (DSR) and the beam bending rheometer (BBR) were employed to research the performance of BRA-modified asphalt by adding SBR. The results showed that the pure asphalt in BRA was the main reason to reduce the low-temperature performance of neat asphalt when the content of BRA was 19%. However, the ash in BRA was the main factor to reduce the low-temperature performance when its content was more than 39.8%. When the BRA content was 59.8%, the SBR-BRA composite modified asphalt with SBR contents of 2%, 4%, 6%, and 8%, and it shows that the penetration and ductility of the BRA-modified asphalt are increased by the addition of SBR. The equivalent brittle point was reduced, the stiffness modulus was decreased, and the creep rate was increased. At the same time, the Brookfield viscosity was reduced and the rutting factor was increased. The stiffness modulus of the SBR-BRA composite modified asphalt mixture was increased. That is to say, when SBR was mixed into the BRA-modified asphalt, the low-temperature performance could be remarkably improved based on ensuring high-temperature performance. The low-temperature index of composite modified asphalt was analyzed. It was recommended to apply the equivalent brittle point to evaluate the low-temperature performance of SBR-BRA composite modified asphalt.

ACS Style

Xiyan Fan; Weiwei Lu; Songtao Lv; Fangwei He. Improvement of Low-Temperature Performance of Buton Rock Asphalt Composite Modified Asphalt by Adding Styrene-Butadiene Rubber. Materials 2019, 12, 2358 .

AMA Style

Xiyan Fan, Weiwei Lu, Songtao Lv, Fangwei He. Improvement of Low-Temperature Performance of Buton Rock Asphalt Composite Modified Asphalt by Adding Styrene-Butadiene Rubber. Materials. 2019; 12 (15):2358.

Chicago/Turabian Style

Xiyan Fan; Weiwei Lu; Songtao Lv; Fangwei He. 2019. "Improvement of Low-Temperature Performance of Buton Rock Asphalt Composite Modified Asphalt by Adding Styrene-Butadiene Rubber." Materials 12, no. 15: 2358.

Journal article
Published: 27 January 2019 in Materials
Reads 0
Downloads 0

Modulus testing methods under various test conditions have a large influence on modulus test results, which hinders the accurate evaluation of the stiffness of asphalt mixtures. In order to decrease the uncertainty in the stiffness characteristics of asphalt mixtures under various stress states, the traditional unconfined compression test, direct tensile test, and the synchronous test method, based on the indirect tension and four-point bending tests, were carried out for different loading frequencies. Results showed that modulus test results were highly sensitive to the shape, size, and stress state of the specimen. Additionally, existing modulus characteristics did not reduce these differences. There is a certain correlation between the elastic modulus ratio and the frequency ratio for asphalt under multiple stress states. The modulus, under multiple stress states, was processed using min–max normalization. Then, the standardization model for tensile and compressive characteristics of asphalt under diverse stress states was established based on the sample preparation, modulus ratio variations, and loading frequency ratio. A method for deriving other moduli from one modulus was realized. It is difficult to evaluate the stiffness performance in diverse stress states for asphalt by only using conventional compressive and tensile tests. However, taking into account the effects of stress states and loading frequencies, standardized models can be used to reduce or even eliminate these effects. The model realizes the unification of different modulus test results, and provides a theoretical, methodological, and technical basis for objectively evaluating moduli.

ACS Style

Xiyan Fan; Songtao Lv; Naitian Zhang; Chengdong Xia; Yipeng Li. Characterization of Asphalt Mixture Moduli under Different Stress States. Materials 2019, 12, 397 .

AMA Style

Xiyan Fan, Songtao Lv, Naitian Zhang, Chengdong Xia, Yipeng Li. Characterization of Asphalt Mixture Moduli under Different Stress States. Materials. 2019; 12 (3):397.

Chicago/Turabian Style

Xiyan Fan; Songtao Lv; Naitian Zhang; Chengdong Xia; Yipeng Li. 2019. "Characterization of Asphalt Mixture Moduli under Different Stress States." Materials 12, no. 3: 397.

Journal article
Published: 22 May 2018 in Applied Sciences
Reads 0
Downloads 0

In order to explore the moduli decay patterns of asphalt mixtures under different loading conditions, the nonlinear fatigue damage model was implemented in order to simulate the moduli decay patterns. Then, the direct tensile, indirect tensile, and uniaxial compression fatigue tests were employed under four kinds of stress levels with four parallel tests. The specimens of AC-13C Styrene-butadiene-styrene (SBS) modified mixtures were manufactured. Based on the test results, the decay patterns of the moduli during fatigue tests under different stress states were revealed, and the parameters of the damage model under different test conditions were obtained. By changing the values of the model parameters under a certain loading condition, fatigue curves were obtained. Then, the fatigue properties of asphalt mixtures under different stress states could be compared and analyzed directly. The result indicated that the evolution curves of fatigue damage for the direct tensile test, the indirect tensile test, and the uniaxial compression test all experienced three stages, which indicates that the fatigue damage characteristic of asphalt mixtures is non-linear. The decay patterns of the direct tensile moduli and the tensile moduli measured by the indirect tensile test are similar. The decay patterns of the uniaxial compression and the compression moduli measured by indirect tensile test are similar. The decay patterns of tensile and compressive moduli are obviously different. At the same cycle ratio state, the position of the decay curve for the compression moduli is higher than that of the tensile moduli. It indicates that the tensile failure is the main reason of the fatigue damage for asphalt mixture. The new analysis method of fatigue damage was proposed, which provides a possibility to compare the fatigue results that were obtained from different loading conditions and different specimen sizes.

ACS Style

Songtao Lv; Xiyan Fan; Chengdong Xia; Jianlong Zheng; Dong Chen; Lingyun You. Characteristics of Moduli Decay for the Asphalt Mixture under Different Loading Conditions. Applied Sciences 2018, 8, 840 .

AMA Style

Songtao Lv, Xiyan Fan, Chengdong Xia, Jianlong Zheng, Dong Chen, Lingyun You. Characteristics of Moduli Decay for the Asphalt Mixture under Different Loading Conditions. Applied Sciences. 2018; 8 (5):840.

Chicago/Turabian Style

Songtao Lv; Xiyan Fan; Chengdong Xia; Jianlong Zheng; Dong Chen; Lingyun You. 2018. "Characteristics of Moduli Decay for the Asphalt Mixture under Different Loading Conditions." Applied Sciences 8, no. 5: 840.