Article
Construction & Building Technology
Chaoliang Fu, Kai Liu, Pengfei Liu, Markus Oeser
Summary: This paper proposes a new design of magnetically conductive asphalt mixture (MCAM) to improve the uneven temperature distribution problem in the lower part of the inductive healing asphalt mixture (IHAM). Experimental and simulation results confirm that the magnetic converge effect of MCAM can significantly improve the temperature in the lower part of IHAM.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Jun Zhang, Xiaolin Zhu, Wenshan Wang, Hao Chu
Summary: Moisture damage has significant impact on pavement performance and service life. However, the research on the mechanical mechanism, experimental simulation protocol, and theoretical analysis method for this distress is still inadequate. This paper develops an experimental apparatus capable of simulating and investigating asphalt mixture's moisture damage in the lab by improving a dynamic triaxial tester. The test results show that this developed apparatus can satisfactorily simulate moisture damage phenomena in the lab.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Lei Xi, Rong Luo, Hanqi Liu
Summary: The study evaluated the moisture sensitivity of asphalt mixtures using the flow number test, and found that humidity levels can affect the performance and permanent deformation trend of the mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Yingjun Jiang, Yu Zhang, Yong Yi, Tian Tian, Jiangtao Fan, Jinshun Xue
Summary: Improving shear strength is an effective method to enhance the high-temperature performance of asphalt mixtures. This study conducted numerical tests on the uniaxial penetration of asphalt mixtures to investigate the influencing factors and cracking mechanism of shear strength. The stress transfer paths during cracking and the impact of voids on shear cracking behavior were also examined. Based on shear strength, a strong interlock skeleton-dense gradation for AC-20 mixture with high temperature resistance was proposed. The results revealed that increasing asphalt content, enhancing aggregate roughness, and reducing void ratio effectively improved the shear strength of asphalt mixtures. The shear cracking process was influenced by shear stress, tensile stress, and microcrack combination. Shear cracks propagated in a V shape around and beneath the specimen. The presence of voids induced stress concentration, leading to the expansion and penetration of microcracks, consequently reducing the shear strength of the structure. The high-temperature performance of the AC-20 mix with a strong interlock skeleton-dense gradation was improved by approximately 27%.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Anxin Meng, Tiantian Qiu, Xiaochun Zhang, Yanliang Du, Tan Tan, Huijie Lv, Binshuang Zheng, Haihua Yang
Summary: This study investigated the flow resistance of fluid in permeable asphalt mixture by conducting vertical and transverse permeability tests. The fitting equation of permeability was determined and a program for calculating the multi-directional connective void content was developed. The results revealed the influence of anisotropy and structure type of permeable asphalt mixture on the viscous and inertial resistance of fluid flow.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Senlin Ling, Yu Sun, Daquan Sun, Denis Jelagin
Summary: This study investigates the effects of porosity and aggregate size on the slurry permeability performance of porous asphalt mixture (PAM). Through experimental studies and quantitative analysis of the 3D pore structure parameters, it is found that increasing porosity and aggregate size can improve the connected porosity ratio and pore size of PAM, while reducing the number of small pores and isolated pores. The study also reveals that the slurry and water permeability coefficients of PAM are positively correlated with the porosity and aggregate size.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Energy & Fuels
Masoud Kamyab, Mohammad Simjoo, Morteza Dejam, Alireza Alamatsaz
Summary: This study numerically investigated the impact of foam on gas injection in a thick, heterogeneous water-flooded sandstone reservoir, exploring how the foam front affects fluid saturation and mobility. The results showed that the presence of foam reduced gas-phase mobility, improving gas sweep efficiency, delaying gas breakthrough, and enhancing oil recovery. Compared to the SAG method, fingering phenomena were less likely in foam co-injection, and the movement of the foam front was slower.
Article
Green & Sustainable Science & Technology
Xueqin Chen, Yuhao Wang, Zhenhui Liu, Qiao Dong, Xiaokang Zhao
Summary: The temperature distribution of porous asphalt mixtures with steel slag aggregates (SSA) heated by microwave was analyzed in this study. The results showed that when 50% of 4.75-9.5 mm aggregates and 50% of 9.5-13.2 mm aggregates were replaced by SSA, the microwave heating efficiency improvement was optimal. Both laboratory tests and numerical simulations indicated that the inner heating rate was greater than the surface heating rate, with the final inner temperature being higher than the surface temperature.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Construction & Building Technology
Shaohui Li
Summary: The study found that tire braking slip ratio and temperature have a significant influence on the stress and strain of the 3D viscoelastic asphalt pavement. The peak shear strain may increase by 10 times, while the bottom strain is less affected by tire braking.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Thermodynamics
Xuejing He, Ji Wang, Zhenlin Li, Ran Wan, Jie Hu, Zhaoming Yang
Summary: This study presents a numerical model to simulate the evaporation heat transfer of a non-azeotropic hydrocarbon refrigerant mixture, CH4/C2H6, in multiple spiral wound tubes. The flow pattern transition and heat transfer characteristics were analyzed for different component mixing ratios. The findings can contribute to the design and evaluation of spiral wound heat exchangers for liquefied natural gas production.
APPLIED THERMAL ENGINEERING
(2022)
Article
Construction & Building Technology
Jiangtao Fan, Yingjun Jiang, Yong Yi, Tian Tian, Kejia Yuan, Changqing Deng
Summary: The study found that increasing loading speed and confining pressure levels can enhance the dilatancy resistance of asphalt mixture. When pores are evenly distributed, the dilatancy angle decreases as porosity increases; an increase in aggregate content leads to an increase in dilatancy angle. Different aggregate distribution characteristics result in varying dilatancy performances.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Energy & Fuels
Javad Siavashi, Arman Najafi, Mohammad Sharifi, Jalal Fahimpour, Mehdi Shabani, Bo Liu, Kouqi Liu, Jun Yan, Mehdi Ostadhassan
Summary: In this study, NMR imaging and numerical simulation methods were used to reproduce experimental data in a water flood experiment, generating a reliable relative permeability curve that provided detailed insights into the complexities of multiphase flow phenomena.
Article
Computer Science, Interdisciplinary Applications
Can Jin, Shuliang Wang, Pengfei Liu, Xu Yang, Markus Oeser
Summary: This study investigates the impact of aggregate contact indicators on the morphology and stability of asphalt mixtures. A virtual modeling algorithm is proposed to control the density and distribution of aggregate contacts in the microstructure. By conducting simulations and laboratory tests, it is confirmed that the number and uniform distribution of aggregate contacts have a positive influence on the strength and fatigue resistance of mixtures.
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
(2023)
Article
Construction & Building Technology
Tengfei Nian, Jinguo Ge, Ping Li, Meng Wang, Yu Mao
Summary: The research showed that the splitting strength and flexural tensile strength of asphalt mixtures increased with the maximum nominal particle size in the gradation. Contact fracture between aggregate is the principal reason for asphalt mixture cracking. Contact between the aggregates contributes the most to the splitting strength, while contact between the asphalt mortar and the aggregate contributes more than 85% to the flexural tensile strength of the asphalt mixture.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Li Ruan, Rong Luo, Derun Zhang, Biao Wang
Summary: This paper successfully developed a 2D ordinary state-based peridynamics method to simulate crack propagation, branching, and coalescence in asphalt mixtures. Data were obtained through X-ray computed tomography and dynamic modulus tests, and the simulation results were validated through experiments, demonstrating the accuracy of the proposed method.
MATERIALS AND STRUCTURES
(2021)
Article
Construction & Building Technology
Mrinali Rochlani, Sabine Leischner, David Wareham, Silvia Caro, Gustavo Canon Falla, Frohmut Wellner
Summary: This research used Dynamic Shear Rheometer and Single Stress Creep Recovery tests to assess the impact of crumb rubber on bitumen performance. The results suggest that adding crumb rubber can improve the rheological, low temperature, permanent deformation, and fatigue properties of bitumen.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
Article
Construction & Building Technology
Anand Sreeram, Zhen Leng, Ramez Hajj, Wellington L. G. Ferreira, Zhifei Tan, Amit Bhasin
Summary: Determining the permissible amount of reclaimed asphalt pavement (RAP) in new pavement mixes is a design challenge due to the limited understanding of the interaction between aged and unaged binders. The study found that small proportions of aged binders have limited effect on the stability of unaged binders.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
Article
Construction & Building Technology
Talita de Freitas Alves, Paulo Andre Moraes Pereira, Rosangela Motta, Kamilla Vasconcelos, Jamilla Lutif Teixeira, Liedi Bernucci
Summary: This paper investigates the mechanical response of railway tracks using bituminous subballast (BS) through numerical modeling. The results show that the use of BS reduces displacements on foot-of-rail and stresses on the subgrade, and different air voids content in bituminous mixtures has a negligible effect on the overall track response.
ROAD MATERIALS AND PAVEMENT DESIGN
(2022)
Article
Materials Science, Characterization & Testing
W. L. G. Ferreira, V. T. F. Castelo Branco, K. Vasconcelos, A. Bhasin
Summary: This research investigates the impact of cluster disintegration on the aggregate properties of recycled asphalt mixture. By partially activating the RAP binder, it was found that the properties of RAP aggregate are significantly affected. Partial cluster dissociation also has a significant impact on the gradation curve and aggregate shape of the recycled mixture.
JOURNAL OF TESTING AND EVALUATION
(2022)
Article
Construction & Building Technology
Carlos Rivera, Silvia Caro, Edith Arambula-Mercado, Diana B. Sanchez, Pravat Karki
Summary: Porous friction courses (PFC) are thin layers of asphalt mixtures with open gradations and high air void contents that are placed over conventional flexible pavements. The main challenge with PFC is their short service life. The use of highly polymer-modified asphalts (HiMA) binder can enhance the cracking and degradation resistance of PFC mixtures and potentially increase their service life.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2023)
Article
Construction & Building Technology
Diana B. Sanchez, Silvia Caro, Allex E. Alvarez
Summary: This study investigates different approaches to select suitable doses of three palm-oil-based rejuvenators for restoring the properties of binder in asphalt mixtures with high RAP content. Two commercial vegetable-based rejuvenators are used for comparison. The dose selection methods include penetration, softening point, PGH verified with PGFL, and a novel approach based on SFE measurements. The optimal dose is determined based on the ability to achieve equivalent or better properties compared to the virgin binder. Results suggest that the PGH approach verified with PGFL is the most appropriate method for determining the optimum rejuvenator dose. This methodology is validated through rheological and chemical testing on the recycled binder blends.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2023)
Article
Construction & Building Technology
Maria Jose Castro-Alonso, Leidy V. V. Espinosa, Paulo Ricardo Franco Marcelino, Kamilla Vasconcelos Savasini, Julio Cesar Dos Santos, Raquel Moraes, Silvio Silverio da Silva, Liedi L. B. Bernucci
Summary: This study characterized two bio-binders (Bio A and Bio B) derived from pine wood resins and designed for full replacement of asphalt binder. Various analytical techniques were used to evaluate the studied materials, including elemental analysis, FTIR, GC-MS, TGA, and rheological testing. The susceptibility to aging was assessed by comparing unaged and short-term aged samples of the binders. Bio A exhibited a penetratio grade of 29 (0.1 mm) and a softening point of 55.2 degrees C, while Bio B had a penetration grade of 21 (0.1 mm) and a softening point of 57 degrees C. AC 30/45 showed a penetration grade of 30 (0.1 mm) and a softening point of 55 degrees C. Bio B was found to be more prone to aging, potentially due to the higher content of saturated fatty acid methyl esters.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Construction & Building Technology
Athira Mangalath Shine, Gustavo Canon Falla, Erik Kamratowsky, Frohmut Wellner, Silvia Caro, Alexander Zeissler, Sabine Leischner
Summary: The use of cylindrical column specimens is beneficial for characterising the fatigue degradation of bituminous materials at different length scales. However, specimen failure at the interface between the test material and steel holders is common. This study investigates the fatigue characterisation of four binders using four different notched column geometries, successfully obtaining fatigue life curves for the different binders.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Construction & Building Technology
Leidy V. Espinosa, Kamilla Vasconcelos, Allex E. Alvarez, Amit Bhasin, Liedi Bernucci
Summary: Limited research has been conducted on the characteristics and performance of paving mixtures made with 100% bio-binders. This paper evaluates the moisture damage susceptibility of wood-based bio-binder-aggregate interfaces and compares it to neat and highly modified asphalt binders. The results indicate that the bio-binder has similar or higher moisture damage resistance compared to traditional asphalt binders.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Construction & Building Technology
Karina Suzuki, Kamilla Vasconcelos, Luis Miguel Klinsky, Iuri Bessa
Summary: This research examines the use of recycled asphalt mixtures (RAMs) as a wearing course in heavily trafficked highways. The study investigates the impact of different percentages of recycled asphalt pavement (RAP) and the addition of a recycling agent (RA) on the mechanical properties of RAMs. RAMs with varying RAP contents (10%, 20%, 25%, 35%, 50%, and 65%) were evaluated, and the effects of the RA on two specific mixtures (25% and 50% RAP content) were also studied. The results show that conditioning the RAP during production influences the activation of the RAP binder and the mechanical behavior of the mixtures. RAMs with higher RAP contents exhibit better resistance to permanent deformation and fatigue cracking due to the activation of the RAP asphalt binder. Additionally, the inclusion of the RA enhances fatigue resistance without compromising rutting resistance for higher RAP contents.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Engineering, Civil
Ana Luisa Aranha, Liedi Legi Bariani Bernucci, Kamilla L. Vasconcelos
Summary: Data preprocessing, hyperparameter selection, and time series size significantly affect the performance metrics of machine learning algorithms in behavior prediction in the field of engineering. This study analyzes the performance of three ML algorithms (support vector machine, random forest, and artificial neural network) on predicting maximum deflection and international roughness index, finding that artificial neural network is the most accurate technique.
TRANSPORTATION RESEARCH RECORD
(2023)
Article
Engineering, Civil
Leidy V. Espinosa, Julia A. Rodrigues, Kamilla Vasconcelos, Liedi Bernucci, Simon Pouget
Summary: The use of bio-oils and biobinders in recycled asphalt mixtures has attracted attention due to their ability to incorporate more recycled material while reducing new asphalt binder consumption. Concerns about the overall performance of the recycled mixture have prompted investigations to optimize the restoration of aged binder properties. This study verifies blending charts based on high performance grade (HPG) temperature and shows that a commercial plant-based binder can effectively restore and improve the properties of aged asphalt binders.
TRANSPORTATION RESEARCH RECORD
(2023)
Article
Construction & Building Technology
Eduardo J. Rueda, Silvia Caro, Bernardo Caicedo
Summary: This study quantifies the changes in the linear viscoelastic properties of a conventional asphalt mixture subjected to multiple wetting-drying cycles. The results show the irreversible effect of wetting-drying cycles on these properties and suggest that the degree of saturation impacts the performance of the mixture.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Julia A. Rodrigues, Kamilla L. Vasconcelos, Amy Epps Martin, Edith Arambula-Mercado, Eyad Masad
Summary: This study investigates the effect of multiple recycling on binder properties in reclaimed asphalt pavement (RAP) and simulates the aging process of binders in RAP. The results show that the binder can be reused up to three cycles while maintaining good performance, but attention should be given to the cumulative effect of bio-oils.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Multidisciplinary Sciences
Zila Maria Garcia Mascarenhas, Igor Amorim Beja, Kamilla Lima Vasconcelos, Liedi Legi Bariani Bernucci
Summary: Heavy traffic and high temperatures can cause rutting in paved areas, but this can be reduced by using large-stone asphalt mixtures (LSAMs) as intermediate layers. LSAM is asphalt concrete with a nominal maximum aggregate size of at least 25 mm. Three LSAMs were designed using different compaction methods and varying compaction energy. The parameters evaluated, such as asphalt content and locking point, are important in LSAM design.
ACTA SCIENTIARUM-TECHNOLOGY
(2023)
