Article
Engineering, Chemical
Soumia Kheira Sebsadji
Summary: The study aims to develop a mathematical model to characterize the properties of different dry concrete mixtures. By proposing a single equation to describe continuous aggregate gradations and combining multiple ideal grading curves, higher flexibility in optimizing the particle-size distribution of a concrete mixture can be achieved.
Article
Engineering, Chemical
Julien Dupas, Florent Baldeweck, Vincent Meunier
Summary: The flow performance of food powders is crucial in product development, as it can affect the dosing and filling processes. This study investigates the influence of various parameters on the flowability of carbohydrate powders, such as particle size and moisture content.
JOURNAL OF FOOD ENGINEERING
(2024)
Article
Construction & Building Technology
Chao Zhao, Qujian Li, Xingu Zhong, Tianyu Zhang
Summary: A composite cementitious material named as porous metal concrete (PMC) is proposed in this study, which has excellent characteristics such as large plastic deformation and superior energy absorption properties. The presence of porous metal may be one of the possible reasons for the excellent mechanical properties of PMC.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Md Ibrahim Mostazid, Yuya Sakai
Summary: This study investigates the effects of thermal treatment on the physical and hydration characteristics of waste concrete, and finds that a higher amount of slag can improve the properties of the compacted concrete. The results show that thermally treated compacts have sufficient hydration and good mechanical performance, making them viable materials for prefabricated nonstructural applications.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Yi Zhang, Hui Li, Ahmed Abdelhady, Jie Yang, Hanbing Wang
Summary: The study investigated the influence of size and shape on the permeability and mechanical properties of porous concrete. The results showed that factors such as porosity, aggregate size, aggregate type, and cement grade could affect the strength of porous concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Yunteng Huang, Jun Wang, Mengjie Ying, Junfeng Ni, Mingfeng Li
Summary: The particle-size gradation significantly affects the cyclic shear behavior of recycled concrete aggregate (RCA). Well-graded RCA exhibits higher shear strength, vertical displacement, stiffness, and damping compared to poorly-graded and discontinuously-graded RCA. Further, post-cyclic shear tests show enhanced shear strength in RCA, with well-graded RCA demonstrating superior friction characteristics.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Wei Jiang, Rong Lu, Chengwei Xing, Qing Zhang, Dongdong Yuan, Yining Li
Summary: Permeable pavement is prone to blockage, which affects drainage and skid resistance. This study examined the clogging characteristics and cleaning methods of different permeable pavement specimens. The results showed that vacuum cleaning and high-pressure washing had higher recovery rates compared to high-pressure washing alone.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2023)
Article
Materials Science, Ceramics
Guobing Chen, Feiyue Yang, Shuang Zhao, Kunfeng Li, Jun Chen, Zhifang Fei, Zichun Yang
Summary: Porous mullite ceramics with high strength were successfully prepared using fly ash hollow spheres as raw materials through the protein foaming method. By increasing the sintering temperature, the crystal structure of the samples improved, enhancing their compressive strength and flexural strength. The use of smaller hollow spheres reduced the open porosity of the samples and shifted the median pore size to smaller diameters. Reducing the particle size of the fly ash hollow spheres significantly improved the compressive strength and flexural strength of the samples.
CERAMICS INTERNATIONAL
(2022)
Article
Construction & Building Technology
Bo Wen, Ding Huang, Lu Zhang, Qiyu Song, Guanyi Gao, Dewen Huo
Summary: A numerical model of coal gangue concrete based on a mesoscale was established to study its mechanical properties and failure modes. Increasing the mortar strength can increase the peak stress and brittleness of the concrete. The size effect of coal gangue concrete is more significant, and conversion factors should be considered.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Jinxu Mo, Fengming Ren, Yaohong Ye, Shiyu Tian, Chuling Lai
Summary: This study investigates the substitution of natural fine aggregates with crumb rubber in concrete, showing that different CR particle size intervals can affect the flexural properties and microstructure of the concrete. Incorporating CR improves the concrete's ductility, with apparent density and flexural strength initially decreasing then increasing with decreasing CR size.
Article
Construction & Building Technology
Jinxu Mo, Fengming Ren, Shiyu Tian, Qing Wang, Johnny Ching Ming Ho
Summary: This paper investigates the impact of crumb rubber (CR) particle size on the mechanical and microstructure properties of crumb rubber concrete (CRC). The results show that as the size of CR decreases, the workability of CRC significantly improves, and the apparent density and strength exhibit a trend of initial decrease followed by an increase. The presence of CR greatly improves the brittleness of the concrete, with smaller-sized CR showing greater effectiveness.
STRUCTURAL CONCRETE
(2023)
Article
Green & Sustainable Science & Technology
Sachinthani Karunarathna, Steven Linforth, Alireza Kashani, Xuemei Liu, Tuan Ngo
Summary: By adding recycled tire aggregates into rubberized concrete, it can enhance the ductility and energy absorption, improving the toughness of concrete with minimal impact on its strength and other properties. This modified RC has the potential to be used in structural elements for earthquake resistance, integral bridges, or impact resistant road barriers.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Construction & Building Technology
Chang Sun, Qiuyi Chen, Jianzhuang Xiao, Weiyang Ge
Summary: The study analyzed the aggregate interlock behavior of recycled aggregate concrete (RAC) through experiments on pre-cracked push-off specimens. Various factors such as surface roughness, RCA replacement ratio, concrete strength, aggregate particle size, and loading rate were considered. It was found that factors like RCA replacement ratio and concrete strength have significant impacts on the surface roughness and aggregate interlock capacity of RAC specimens. Additionally, the loading rate showed insignificant influence on the aggregate interlock behavior within a certain range.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Chemistry, Physical
Lucie Korena, Vaclav Slovak, Gabriela Zelenkova, Tomas Zelenka
Summary: The effects of porosity and particle size on carbon surface oxidation were investigated. Carbon xerogels with different porosity and particle size were prepared and characterized. Isothermal thermogravimetry experiments showed that particle size and porosity significantly influence diffusion and heat transfer during carbon oxidation. The apparent kinetic parameters were determined, and it was found that porosity and particle size do not affect the basic chemical reactions occurring on the carbon surface during oxidation.
Article
Mathematics, Interdisciplinary Applications
D. Sun
Summary: The migration of particles in slurry is constrained in porous media, leading to changes in the structure and topology of the media and affecting the fluid dynamics of both fluid and particles. Clogging issues, primarily determined by the size ratio between pore throat openings and particle diameters, reduce flow and permeability. Numerical simulation is used to study the transport and clogging of particles in microscale porous media, focusing on the effects of particle volume fraction and Stokes number on clogging, as well as the permeability of the media.
COMPUTATIONAL PARTICLE MECHANICS
(2023)