Article
Materials Science, Multidisciplinary
Song Li, Xingxing Shi, Chundi Si, Binshuo Bao, Mengmeng Hu
Summary: The properties of asphalt mortar have a significant impact on the performance of an asphalt mixture. This study aimed to evaluate the correlation between the high-temperature performance of an asphalt mixture and the rheological properties of its corresponding asphalt mortar. The multisequence repeated loading (MSRL) test was used to assess the high-temperature performance, while a modified multiple-stress creep-recovery (MSCR) test was proposed to evaluate the rheological properties of asphalt mortar. The results showed a strong correlation between the rheological response of asphalt mortar and the high-temperature behavior of the asphalt mixture.
Article
Construction & Building Technology
Yasser M. Alghrafy, El-Sayed M. Abd Alla, Sherif M. El-Badawy
Summary: This study found that adding recycled plastic waste (RPW) can improve the rutting and fatigue performance of virgin asphalt and sulfur extended asphalt (SEA). RPW addition can slow down the binder oxidation reactions. RPW has a significant impact on the performance of asphalt.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Wuping Ran, Hailin Zhu, Xizhong Shen, Yu Zhang
Summary: This study investigates the use of silane coupling agent modified oil sludge pyrolysis residue in asphalt mortar. The findings show that the use of silane coupling agent significantly improves the high-temperature performance and adhesion performance of the asphalt mortar, while optimizing the low-temperature performance. The modified asphalt mortar exhibits better pavement performance compared to mineral powder asphalt mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Haiqi He, Pengfei Gou, Rui Li, Jianzhong Pei, Baowen Xie, Kai Yang
Summary: In this study, liquid rubber (LR) was used to improve the properties of base asphalt binder, resulting in the liquid rubber modified asphalt (LRMA). The findings showed that LRMA has better thermal stability and workability compared to crumb rubber modified asphalt (CRMA). Additionally, the addition of LR slightly enhances high-temperature rutting resistance and significantly improves resistance to low-temperature cracking and fatigue.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Multidisciplinary Sciences
Daniela Laura Buruiana, Puiu Lucian Georgescu, Gabriel Bogdan Carp, Viorica Ghisman
Summary: One objective of the circular economy is to solve the plastic pollution crisis and promote recycling through waste reduction. This study demonstrates the potential for recycling two types of high-risk waste, polypropylene-based microplastics and abrasive blasting grit, in asphalt roads. The effects of incorporating these wastes into the asphalt mixture were evaluated, and the modified mixture showed improved performance, especially with 0.3% of polypropylene. The use of polypropylene-based microplastics effectively reduces the occurrence of cracks during temperature changes.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Enle Xu, Zhenyong Miao, Xiaofeng Jiang
Summary: In this study, the effect of waste brake oil (WBO) on the dispersion property of coal-sludge oil slurry (CSOS) was investigated. It was found that WBO could significantly reduce the apparent viscosity of CSOS and by adjusting the sewage sludge (SS) content and oil/sludge ratio (O/S), the viscosity of CSOS could be effectively improved. WBO mainly consists of hydrocarbon compounds and oxygenated functional groups, which could form a covering layer on the surfaces of SS and coal particles, reducing their hydrophobicity and the adsorption of dispersant. This research provides a potential method for the disposal of waste sludge and industry oil.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Construction & Building Technology
Yangke Qiu, Yang Gao, Xiao Zhang, Yachun Wei, Junsheng Cao, Xiaolong Wang, Shuhui Wang
Summary: To improve asphalt performance, waste cooking oil (WCO) was used to activate crumb rubber (CR) and acrylonitrile-butadienestyrene (ABS) to produce crumb rubber modified asphalt (CRMA) with low temperature sensitivity, excellent storage stability, and improved working performance. The modified asphalt displayed reduced penetration and increased softening point and low temperature fracture work. WCO activated ABS/CR also lowered the rotational viscosity and mixing and compaction temperature of CRMA. The addition of ABS decreased asphalt temperature sensitivity and improved storage stability, while proper proportions of ABS and WCO reduced separation index (SI) of CRMA.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Rana A. Yousif, Sady A. Tayh, Israa F. Al-Saadi, Abbas F. Jasim
Summary: The increase in oil prices and traffic volumes worldwide has led to a significant rise in the price of asphalt binder. This has spurred the demand for more viscous and lower-cost asphalt for pavement construction, as well as the development of alternative materials that have a positive impact on human health and the environment. The incorporation of fibers in asphalt mixes has been researched for decades and has been found to enhance pavement performance. This study focused on modifying asphalt binders with brown recycled wool fiber and China polyester fiber to improve their high-temperature performance. The results showed that the fiber-enhanced asphalt binders had increased softening point, viscosity, and modulus, while decreasing penetration. These findings suggest that using fibers as modifiers for asphalt binders can enhance their performance and improve pavement rutting resistance.
ADVANCES IN CIVIL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Yuechao Zhao, Meizhu Chen, Shaopeng Wu, Qi Jiang
Summary: The utilization of waste in society is important for sustainable development. This study focused on waste cooking oil (WCO) and reclaimed asphalt pavement (RAP), and investigated the impact of different components of WCO on the rheological properties and microscopic characteristics of aged asphalt. The results showed that all components of WCO had a significant effect on mitigating the brittleness of aged asphalt. However, certain wax-like substances in WCO had a negative effect on the fatigue and low-temperature performance of aged asphalt.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Metallurgy & Metallurgical Engineering
Yong-le Zhao, Guo-qiang Li, Tao Li, Hong-yu Wang, Shu-ting Zhang, Yong-fa Zhang
Summary: The method of preparing modified asphalt mixture with CSPM improves the performance of the asphalt mixture, increasing Marshall stability and dynamic stability while decreasing splitting tensile strength. Chemical analysis shows sulfur reacts with asphalt to improve high temperature stability and water resistance.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
Article
Construction & Building Technology
Hong -Hu Chu, Abdulaziz Ibrahim Almohana, Ghassan A. QasMarrogy, Sattam Fahad Almojil, Abdulrhman Fahmi Alali, Khaled Twfiq Almoalimi, Amir Raise
Summary: The increase in traffic and changes in weather conditions have led to many distresses in the pavement. Asphalt binder modification is the best way to control these stresses. Meanwhile, utilizing warm mix asphalt additives has significant environmental benefits. This research investigates the influence of using waste materials (ground tire rubber and natural bitumen) on the performance behavior of asphalt binders and mixtures containing warm mix asphalt additive. The results show that the combination of waste materials improves the fatigue and rutting performance, and adding waste natural bitumen decreases the low-temperature behavior of the asphalt binder while adding waste ground tire rubber improves the resistance against low-temperature cracking.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Qianli Gu, Aihong Kang, Bo Li, Peng Xiao, Hao Ding
Summary: Fiber has a significant impact on the performance of asphalt materials. Basalt fiber can improve the high-temperature rheological properties of asphalt mortars and enhance stress dissipating ability at low temperatures. factors such as fiber type, content and length all influence the rheological properties of asphalt mortars.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Jianwei Zhang, Meizhu Chen, Shaopeng Wu, Xinxing Zhou, Guangyuan Zhao, Yuechao Zhao, Ming Cheng
Summary: This research investigated the performance of high-content WRP modified asphalt and methods to suppress volatile organic compounds emissions. The results showed that adding 6% nano calcium carbonate can effectively inhibit the production of volatile organic compounds in asphalt.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Yanbing He, Jin Yi, Tuo Huang
Summary: Laboratory tests were conducted to compare the rheological properties of different asphalt types and investigate their mechanical behaviors. The results showed that modified asphalt with a 15% rock compound additive exhibited superior rheological properties compared to other forms of modified asphalt. The addition of the rock compound additive significantly enhanced the compressive strength, splitting strength, and fatigue life of the asphalt mixtures. This research has practical significance for improving the resistance to rutting in asphalt pavement.
Article
Construction & Building Technology
Yasser M. Alghrafy, Sherif M. El-Badawy, El-Sayed M. Abd Alla
Summary: This research evaluates the rheological properties of virgin asphalt and SEA modified with recycled plastic waste, analyzing the effects of different concentrations and comparing environmental and economic benefits. Results show that using modified SEA can reduce costs by approximately 29%, providing better environmental and economic benefits compared to virgin asphalt, with improved performance.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
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)