Article
Construction & Building Technology
Saeed Amani, Hamid Jahanbakhsh, Mohammad M. Karimi
Summary: In recent years, researchers have focused on evaluating the effectiveness of induced healing techniques and increasing the healing capacity of asphalt materials. This study aims to develop a methodology to assess the impact of induced healing on fracture characteristics and life extension of asphalt mixtures. Experimental tests were conducted to determine fracture-related parameters, and the healing efficiency was quantified using healing indices. The results showed that the induced healing method can extend the pavement life, but its effectiveness is reduced with increased aging of the asphalt mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Laura Trigos, Juan Gallego, Jose Ignacio Escavy, Luis Picado-Santos
Summary: The research focused on studying the relationship between the dielectric properties of aggregates and their susceptibility to microwave heating, proposing a model for the relationship between the T70 parameter and the loss tangent. The findings contribute to a deeper understanding of aggregate heating with microwaves, which is important for the development of self-healing asphalt pavements.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
Dong Lu, Xi Jiang, Zhen Leng, Shaowei Zhang, Daiyu Wang, Jing Zhong
Summary: The development of multifunctional asphalt concrete with high heating-healing capability is crucial for pavement maintenance and sustainable infrastructure. This study proposes a novel concept of using a dual responsive microwave heating-healing system in asphalt concrete, incorporating coal gangue (CG) and functional aggregates. By establishing a robust and functional skeleton structure and facilitating the healing of microcracks, this approach shows potential for practical applications in the field of sustainable pavement engineering.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Construction & Building Technology
Hanwen Yang, Jian Ouyang, Zhao Jiang, Jinping Ou
Summary: Microwave heating is an effective method for accelerating the healing of asphalt mixtures with cracks containing microwave-absorbing materials. The reinforcement effects of three fibers (carbon fiber, steel fiber, and steel wool) on the mechanical properties and self-healing ability of the mixtures were studied. Freeze-thaw cycles had adverse effects on the mechanical properties and healing ability of fiber-modified asphalt mixtures. Among the three fibers, steel fiber showed the strongest reinforcement effect on fracture behavior, with less susceptibility to moisture and freeze-thaw effects compared to steel wool and carbon fiber. Steel fiber is recommended for fabricating self-healing asphalt mixtures considering the harmful impacts of freeze-thaw cycles and the beneficial impacts of fiber reinforcement.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Fu Wang, Hongbin Zhu, Benan Shu, Yuanyuan Li, Dengjun Gu, Yangming Gao, Anqi Chen, Jianlin Feng, Shaopeng Wu, Quantao Liu, Chao Li
Summary: Traditional asphalt mixtures have limited ability to absorb microwave energy efficiently, hindering the development of microwave heating technology in road maintenance. By utilizing basalt aggregates with favorable microwave heating characteristics, the overall microwave self-healing rate of asphalt mixtures can be enhanced. Through testing the elements and electromagnetic parameters of basalt aggregates, the microwave heating mechanism is revealed. The study also investigates the heating characteristics, flexural strength, fatigue resistance, and self-healing performance of asphalt mixtures through tests. The results demonstrate that basalt aggregates, highly correlated with Si, Fe, and Al elements, exhibit excellent wave absorbing properties, absorbing microwave energy through dielectric and magnetic losses. The type and particle size of aggregates affect the microwave heating rate. After microwave heating, asphalt mixtures with basalt and limestone aggregates can recover at least 65% and 23% of their flexural strength and fatigue resistance, respectively.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Review
Polymer Science
Letao Zhang, Zihan Zhang, Weixiao Yu, Yinghao Miao
Summary: This paper reviews the application prospect of microwave heating technology in improving the efficiency of asphalt pavement self-healing and de-icing. The properties of asphalt concrete after microwave heating, self-healing evaluation indicators, and the application of microwave heating in pavement de-icing are summarized. The potential of microwave heating technology in promoting asphalt pavement self-healing and de-icing is promising, but further research is needed on cost-effectiveness, performance indicators, and aging.
Article
Construction & Building Technology
Yue Deng, Jianmin Ma, Tong Lu, Daquan Sun
Summary: The addition of microwave absorbers or microwave reflecting admixtures to asphalt concretes can improve the heating and healing efficiency under microwave radiation. Different types of heterogeneous materials can synergize to enhance the healing ratio. The interaction between manganese dioxide powder and steel fiber has a significant influence on the heating and healing capacity of the asphalt concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Review
Construction & Building Technology
B. R. Anupam, Umesh Chandra Sahoo, Anush K. Chandrappa
Summary: Maintenance and rehabilitation at appropriate time are essential for asphalt pavements to serve their design lives. Self-healing technologies, such as incorporation of healing agents and heating methods, using nanomaterials and polymers as additives, have been developed to rectify defects internally. This paper provides an overview of the healing mechanisms, design, and implementation of self-healing technologies in asphalt pavements, and identifies areas for further research.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Bin Zhang, Xu Gao, Shi Xu, Xinkui Yang, Qin Tian, Jiayi Liu
Summary: This study investigates the synergistic effect of basalt and coal gangue powder (CGP) on the microwave heating self-healing of an asphalt mixture, and finds that the addition of CGP can improve the microwave heating speed, water stability, and fracture energy recovery of the asphalt mixture. These results will further promote the utilization rate of coal gangue.
Article
Chemistry, Physical
Hao Xu, Mingzhi Sun, Guobao Luo
Summary: This paper aims to evaluate the feasibility of replacing limestone powder (LP) with steel slag powder (SSP) to enhance the heat release and self-healing properties of asphalt and asphalt mixtures. The microwave-heating characteristics and microstructure differences between SSP and LP were analyzed. The optimal healing temperature was determined through tests, and effects on temperature distribution and healing properties were explored. Results showed that SSP-containing asphalt mixtures had excellent microwave absorption capacity and increased healing index compared to conventional mixtures. Temperature was found to be the most important factor affecting healing behavior.
Article
Construction & Building Technology
Erkut Yalcin
Summary: The study investigated the effects of microwave and induction heating on self-healing of asphalt mixtures with waste metals, and found that the microwave heating method yielded better self-healing characteristics in asphalt pavements.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
Mansour Fakhri, Sajad Javadi, Reza Sedghi, Alireza Sassani, Ali Arabzadeh, Behnam Baveli Bahmai
Summary: This study evaluated the influence of polymer-modification on the induction heating capability of asphalt mastic in a microwave field, and investigated its application for ice melting and self-healing purposes. Different asphalt mastic mixtures with various polymer modifications were tested for their induction heating, ice-melting, and self-healing abilities. The results showed that polymer modification affected the performance, with SBS-modified asphalt binders exhibiting better results than other polymer-modified binders.
Article
Green & Sustainable Science & Technology
Kevork Micael Nalbandian, Manuel Carpio, Alvaro Gonzalez
Summary: This study assesses the sustainability of asphalt pavement maintenance using the MWHSHT, with results showing reductions in energy and material consumption, as well as economic indicators, compared to traditional maintenance. The inclusion of MWHSHT also has potential social benefits.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Jianan Liu, Tonghuan Zhang, Haoyan Guo, Zhenjun Wang, Xiaofeng Wang
Summary: This study investigated the self-healing properties of asphalt mixture prepared by partially replacing limestone with steel slag and subjected to microwave heating. The results showed that steel slag has good wave absorption performance, and the self-healing properties of the steel slag asphalt mixture were superior to that of the conventional mixture, with higher steel slag content leading to better self-healing performance.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Construction & Building Technology
Baowen Lou, Aimin Sha, Diego Maria Barbieri, Zhuangzhuang Liu, Fan Zhang, Wei Jiang
Summary: This study evaluates the feasibility of enhancing microwave heating uniformity and self-healing properties of steel slag asphalt mixtures by replacing some limestone filler with ferrite. Results show that ferrite has excellent microwave absorption properties, but excessive use may affect the rheological behavior of asphalt mortar.
MATERIALS AND STRUCTURES
(2021)
Article
Construction & Building Technology
Qing-feng Liu, Xiao-han Shen, Branko Savija, Zhaozheng Meng, Daniel C. W. Tsang, Samad Sepasgozar, Erik Schlangen
Summary: This study investigates the behavior of multi-ions, including calcium and chloride, in concrete under wastewater and seawater conditions. Multiple mechanisms, such as calcium leaching, chloride transport, and multi-ion coupling, were analyzed. The interactive ingress of multi ions was realized through simulation methods, considering the individual mechanisms and mutual influences. The study also examined the distributions of diverse ions and the evolution mechanisms of porosity, considering the interaction with calcium ions in both pore solution and solid phase. The results suggest that calcium leaching accelerates chloride transport due to coarsened pore structure, and the electrochemical coupling effect of multi ions facilitates calcium leaching in the early stage but slightly delays it in the later stage.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Construction & Building Technology
Minfei Liang, Ze Chang, Yu Zhang, Hao Cheng, Shan He, Erik Schlangen, Branko Savija
Summary: This study aims to investigate the autogenous deformation and stress evolution in high-volume ground granulated blast furnace slag (GGBFS) concrete. The macro-scale autogenous deformation and stress evolution were studied using the Temperature Stress Testing Machine and Autogenous Deformation Testing Machine. The micro-scale origin of the autogenous deformation was explored using scanning electron microscopy, X-ray diffraction, and mercury intrusion porosimetry.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Yu Chen, Minfei Liang, Yu Zhang, Zhenming Li, Branko Savija, Erik Schlangen, Oguzhan Copuroglu
Summary: This study examines the effects of adding superabsorbent polymer (SAP) as an internal curing agent on the flow behavior, structural build-up, hydration kinetics, compressive strength, and autogenous shrinkage of limestone-calcined clay-cement (LC3) pastes with a fixed water to binder ratio (W/B) of 0.3. Results show that SAP increases yield stress and viscosity, as well as structural build-up and hydration, but decreases compressive strength. Additionally, SAP promotes early-age expansion and effectively mitigates autogenous shrinkage of LC3 pastes for up to 7 days.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Yingxue Zou, Haiqin Xu, Shi Xu, Anqi Chen, Shaopeng Wu, Serji Amirkhanian, Pei Wan, Xiang Gao
Summary: This study investigates the moisture erosion and erosion depth of asphalt pavement. The diffusion mechanism of eroded asphalt by moisture is studied, providing a theoretical basis for the development of laboratory moisture erosion test specification. The results show that water can penetrate a 25 μm asphalt film in just four hours, and the relation between erosion depth and immersion period presents three stages.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Yu Chen, Yu Zhang, Shan He, Minfei Liang, Yamei Zhang, Erik Schlangen, Oguzhan copuroglu
Summary: This study investigates the effect of increasing the content of fine-grained metakaolin in calcined clay on the rheology of LC3 pastes. The results show that increasing the content of fine-grained metakaolin decreases flowability but promotes structural build-up and early-age hydration. These phenomena can be attributed to the decrease of mean interparticle distance caused by the increased amount of fine-grained metakaolin.
JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS
(2023)
Article
Construction & Building Technology
A. L. van Overmeir, B. Savija, F. P. Bos, E. Schlangen
Summary: This paper investigates the influence of raw materials and additives on the mechanical properties of printable strain hardening cementitious composites (SHCC) for 3D printing. By improving on a previously developed mixture, two 3DP-SHCC mix designs with significant strain hardening capacity and good printability properties were obtained.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Minfei Liang, Yu Zhang, Shan He, Yu Chen, Erik Schlangen, Branko Savija
Summary: This study investigated the evolution process of high-volume slag cement (HVSC) paste from a chemomechanical standpoint. The evolution of phase assemblage, microstructure development, and micromechanical properties were analyzed at various ages. Key findings include the improvement of the effective elastic modulus by the formation of calcium silicate hydrate (C-S-H) gel phase and the increased elastic modulus due to slag rims produced by slag grains. A two-scale micromechanical model accurately predicted the effective modulus of HVSC composites.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Amir Tabakovic, Jeremy Lemmens, Jelmer Tamis, Dave van Vliet, Sayeda Nahar, Willem Suitela, Mark van Loosdrecht, Greet Leegwater
Summary: Bitumen is essential in asphalt pavements for its binding properties and ability to restore damage caused by traffic loading. With the decline in crude oil production, there is a need to find environmentally sustainable alternatives for bitumen modifiers. This paper investigates the potential use of the bio-based co-polymer PHBV as an alternative bitumen modifier and presents positive results from various tests.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Yu Chen, Yu Zhang, Shan He, Xuhui Liang, Erik Schlangen, Oguzhan copuroglu
Summary: This study investigates the impact of inorganic additives, such as CaCl2 and gypsum, on the structural build-up and early-age hydration of limestone-calcined clay-cement (LC3) pastes within the first 70-80 min. The results show that increasing the dosage of CaCl2 or gypsum accelerates the evolution of storage modulus G' and static yield stress over time, as well as increases chemically bound water (H) content and total specific surface area (SSAtotal). The acceleration by CaCl2 is attributed to stimulating hydration of C3S and C3A and promoting crystal formation, while the increase in gypsum percentage leads to a higher SSAtotal due to unreacted gypsum in the system.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Jinbao Xie, Yading Xu, Zhi Wan, Ali Ghaderiaram, Erik Schlangen, Branko Savija
Summary: A novel piezoelectric energy harvester with auxetic cementitious cellular composites (ACCCs) and surface-mounted PVDF film has been designed and tested in this study. A numerical model has been established and validated to simulate the energy harvesting performance of ACCC-PVDF system under different loading conditions.
ENERGY AND BUILDINGS
(2023)
Article
Mechanics
Sina Sayadi, Ze Chang, Shan He, Erik Schlangen, Iulia C. Mihai, Anthony Jefferson
Summary: This paper introduces a discrete lattice model for simulating structures formed from self-healing cementitious materials, and presents a new approach for simulating time dependent mechanical healing. The model is validated using experimental data and provides detailed information and an accurate calculation method for the volume of healing agent required.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Civil
Shan He, Shozab Mustafa, Ze Chang, Minfei Liang, Erik Schlangen, Mladena Lukovic
Summary: In this study, experiments and numerical simulations were conducted to investigate the cracking behavior of reinforced concrete beams with a thin layer of SHCC. A new type of SHCC/concrete interface was developed to activate SHCC effectively. The results showed that the hybrid beams with the new interface exhibited significantly improved cracking behavior compared to the control beams. The study highlights the strategic use of minimum amount of SHCC to enhance the performance of hybrid structures.
ENGINEERING STRUCTURES
(2023)
Article
Green & Sustainable Science & Technology
Zhifeng Li, Huan Wang, Pei Wan, Quantao Liu, Shi Xu, Jian Jiang, Lulu Fan, Liangliang Tu
Summary: This study aims to explore the healing levels of asphalt concrete containing polymer capsules under various solution healing conditions. The results showed that the healing ratios of capsule-asphalt concrete beams were significantly higher under a dry healing environment than under various solution healing conditions, with the alkali solution having the worst effect on the improvement in healing ratio.
Article
Construction & Building Technology
Ameya Kamat, Barbara Lubelli, Erik Schlangen
Summary: This study investigates the leaching behavior of sodium ferrocyanide and evaluates its effectiveness in reducing salt decay in mortar. The results indicate significant leaching of ferrocyanide ions, highlighting the need to minimize leaching to prolong the positive effect of the inhibitor on mortar durability.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Anne Linde van Overmeir, Branko Savija, Freek P. Bos, Erik Schlangen
Summary: This paper evaluates the effect of each successive phase of the printing process on the mechanical properties of strain-hardening cementitious composites (SHCC). The results indicate that flexural and tensile strength, as well as their associated deflection and strain, are strongly affected by the printing process, while density and compressive strength are not significantly influenced. Additionally, the pumping phase is identified as the primary phase influencing the mechanical properties during the printing process.
