Article
Construction & Building Technology
Xiaohe Yu, Rong Luo, Tingting Huang, Jinteng Wang, Li Ruan
Summary: A dielectric composite model of asphalt mixtures based on relative humidity and frequency was established and verified for accuracy and reliability. The relative humidity-frequency equivalence principle was proposed to unify detection data under different conditions, providing a basis for converting test results of different nondestructive testing equipment.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Chih Chin Yang, Chih Cheng Wu, Yu Liang Hsiao, Zong Hsien Wu, Shun Hsyung Chang, Hung Yu Wang, Chih Lung Shen
Summary: In this research, a capacitance humidity sensor with a nitrogen-doped zinc oxide (N-doped ZnO) sensing film has been developed. The sensing film acts as a semiconductor with p-type hole carriers. The addition of a polymer buffer layer on the sensing film affects the carrier concentration and carrier mobility. The measurements demonstrate the capacitance effect and sensitivity of the sensor.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2022)
Article
Construction & Building Technology
Ruixing Chen, Song Mu, Jiaping Liu
Summary: This paper investigates the relationship between chloride migration coefficient and pore structures of longterm water curing concrete. The results show that an appropriate dosage of supplementary cementitious materials can reduce total porosity and increase the proportion of capillary pores in the concrete, effectively improving the quality control and durability design of reinforced concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Kiran Ram, Marijana Serdar, Diana Londono-Zuluaga, Karen Scrivener
Summary: This study analyzes the mechanical and durability properties of high-performance mortars based on low-grade kaolin clay and investigates the impact of electrical conductivity and pore microstructure on chloride penetration resistance. The findings suggest that even low kaolinite content mixes can be used in high-performance cement systems and that pore structure has a limited effect on chloride penetration.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Anna-Lena Podhajecky, Nadja Oneschkow, Bianca Kern, Ludger Lohaus, Harald S. Mueller, Michael Haist
Summary: Creep and shrinkage of concrete are affected by moisture content and ambient humidity. Current design codes neglect the cyclic changes in ambient humidity, which can have a significant impact on long-term deformations of concrete. Research showed that drying shrinkage and creep, as well as basic creep, are higher with higher initial moisture contents at constant ambient humidity conditions. Additionally, the influence of cyclic ambient humidity was found to cause significantly increased creep strains, especially in concretes with lower initial moisture contents.
MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Chemical
Xingyi Li, Yue Zhang, Yuting Zhang, Yanhong Liu, Zhenjiang Gao, Guangfei Zhu, Yongkang Xie, Samir Mowafy
Summary: A relative humidity control method based on changes of RWSA was proposed, showing shortened drying time in the 30%-RWSA group and the lowest cell aspect ratio in the continuous fanning group. The study results indicated that the quality of shiitake mushrooms could not be improved by shortening RH keeping time.
JOURNAL OF FOOD ENGINEERING
(2022)
Article
Construction & Building Technology
Mohammad Momeen Ul Islam, Jie Li, Rajeev Roychand, Mohammad Saberian
Summary: This study presents the manufacture of structural lightweight concrete (SLWC) using 100% waste coarser tire rubber, and investigates its durability properties. Two newly designed casting moulds were used to improve the strength and durability of rubberized concrete without traditional coarse aggregates. The slump values of different fresh RuC mixes met the requirement specified by ACI 213R, ranging from 84 to 122 mm. The density, compressive strength, and various durability properties of the novel SLWC were evaluated at different time periods.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Geological
Hao Zeng, Chao-Sheng Tang, Cheng Zhu, Farshid Vahedifard, Qing Cheng, Bin Shi
Summary: This study investigates the influence of relative humidity (RH) on soil desiccation cracking through laboratory tests on fat clay. The results show that increasing RH decreases the evaporation rate and increases the water content at which cracking starts. Surface cracks exhibit a hierarchical process under high RH, with wide primary cracks developing first followed by fine sub-cracks. Additionally, higher RH leads to wider desiccation cracks and changes the width distribution of the final crack network.
ENGINEERING GEOLOGY
(2022)
Article
Construction & Building Technology
Hesong Jin, Xu Fan, Zhenlin Li, Weizhuo Zhang, Jun Liu, Daojun Zhong, Luping Tang
Summary: This study investigates the Chloride diffusion behavior in concrete under a continuous humidity environment and NaCl immersion, and evaluates the impacts of water-binder ratio (w/b) and ambient humidity on the humidity diffusion coefficient and Chloride content in concrete. The results show that the content of free Chloride increases with an increasing w/b ratio. The humidity diffusion coefficient is significantly higher during water absorption compared to water loss. Lowering the w/b ratio or increasing the ambient humidity can enhance the ability of concrete to resist Chloride diffusion.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Taotao Cui, Baokuan Ning, Xudong Xia, Chunzheng Zhang, Yi Jiang
Summary: Lightweight aggregates (LWAs) have a negative impact on the compressive strength, elastic modulus, and autogenous shrinkage (AS) of high strength lightweight aggregate concrete (HSLC). The 28-day AS and internal relative humidity (IRH) of HSLC increased when the content of LWAs increased. A linear relationship between AS and compressive strength, and an exponential relationship between AS and IRH were established. A shrinkage prediction model considering IRH and water absorption by LWAs was proposed for HSLC.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Yanchun Miao, Zeyu Lu, Fengjuan Wang, Han Wang, Yali Li, Junlin Lin, Jinyang Jiang
Summary: Dry-cured concrete often suffers from severe early-age shrinkage, leading to significant deterioration of its mechanical properties. This study investigates the evolvement of shrinkage cracking and its relationship with mechanical strength development using experimental and simulation methods, aiming to design durable civil infrastructure in dry environments, such as plateau regions.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Siming Liang, Yuhang Liu, Guofeng Song, Han Yan, Baocang Song, Jiankun Liu
Summary: Incorporating a suitable amount of sulfoaluminate expansive additive (SEA) into cementitious materials can compensate the shrinkage deformation. This study conducted tests to investigate the mechanical properties, internal relative humidity, and shrinkage of cement mortars containing different contents of SEA. The results show that SEA can decrease the porosity of cement mortars and refine their pore structures. The compressive and flexural strengths of mortar decrease with increasing SEA content, and the compensation effect of SEA on shrinkage deformation is less effective under drying condition.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Athanasios Malakopoulos, Manolis Chatzigeorgiou, Nikos Boukos, Athanasios Salifoglou
Summary: This study investigates the impact of adding zinc and butyl stearates to Portland Limestone Cement mortars. The results showed that butyl stearate can enhance the resistance to water permeability and chloride migration in the mixtures, while zinc stearate had a negligible effect on durability performance.
MATERIALS AND STRUCTURES
(2021)
Article
Engineering, Electrical & Electronic
Hongbo Liu, Liqiang Wang, Ruijin Liao, Xuetong Zhao, Jian Hao, Gaohui He
Summary: This study investigated the impact of relative humidity on the surface electric field (SEF) strength and space charge density, with the results showing a mutual inhibition between the two. After corona occurs, SEF decreases with voltage while charge density increases. A turning point for SEF was observed around 70% humidity.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2021)
Article
Green & Sustainable Science & Technology
Wu Zhou, Zhiping Ye, Anton Nikiforov, Jun Chen, Jiade Wang, Liang Zhao, Xiuwen Zhang
Summary: The increase in relative humidity leads to a decrease in discharge power and current, which also affects the efficiency of chlorobenzene removal. Carbon balance analysis shows that CO2 is more easily generated in humid air, with the highest energy efficiency achieved at RH = 40%.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Construction & Building Technology
Khashayar Jafari, Mojtaba Tabatabaeian, Alireza Joshaghani, Togay Ozbakkaloglu
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Review
Construction & Building Technology
Mohammad Balapour, Alireza Joshaghani, Fadi Althoey
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Article
Construction & Building Technology
S. Mahmoud Motahari Karein, Alireza Joshaghani, A. A. Ramezanianpour, Soroush Isapour, Moses Karakouzian
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Article
Construction & Building Technology
Alireza Joshaghani
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2019)
Article
Construction & Building Technology
Mohammad Balapour, Alireza Joshaghani, Weijin Zhao
ADVANCES IN CEMENT RESEARCH
(2020)
Article
Engineering, Civil
Alireza Joshaghani, Dan G. Zollinger
TRANSPORTATION RESEARCH RECORD
(2019)
Article
Engineering, Civil
Alireza Joshaghani, Richa Bhardwaj, Dan G. Zollinger, Anol Kanti Mukhopadhyay
TRANSPORTATION RESEARCH RECORD
(2019)
Article
Green & Sustainable Science & Technology
Maria Rashidi, Alireza Joshaghani, Maryam Ghodrat
Article
Construction & Building Technology
Alireza Joshaghani, Mohammad Balapour, Mohammad Mashhadian, Togay Ozbakkaloglu
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Chemistry, Physical
Moses Karakouzian, Visar Farhangi, Marzieh Ramezani Farani, Alireza Joshaghani, Mehdi Zadehmohamad, Mohammad Ahmadzadeh
Summary: This research investigated the combined effect of nano silica particles (NS) and multi-walled carbon nanotubes (MWCNT) on the compressive and flexural strengths of cement paste. The study found that the combined utilization of silica and carbon nanomaterials did not necessarily result in the maximum strengths, and using higher percentages of pristine NS without MWCNT could further enhance the strength properties of the cement paste.
Article
Construction & Building Technology
Alireza Joshaghani, Mehran Shokrabadi
Summary: This article outlines the applications of Ground Penetrating Radar (GPR) in concrete pavements, including detecting layer thickness, rebar properties, defects, and base layer conditions. GPR technology is used for pavement evaluation through different approaches, providing more details of material properties, and also for thickness and air void content measurements.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
Article
Construction & Building Technology
Reza Bani Ardalan, Zahra Nouri Emamzadeh, Haleh Rasekh, Alireza Joshaghani, Bijan Samali
JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS
(2020)
Article
Construction & Building Technology
Mahya Askarian, Siavash Fakhretaha Aval, Alireza Joshaghani
JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS
(2018)
Article
Construction & Building Technology
Alireza Joshaghani, Mohammad Amin Moeini, Mohammad Balapour, Alireza Moazenian
JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS
(2018)
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
