Article
Construction & Building Technology
Rui Tang, Qunshan Wei, Kai Zhang, Shuai Jiang, Zhemin Shen, Yanxia Zhang, Christopher W. K. Chow
Summary: Construction waste and waste fabric are major types of solid waste that cause landfill issues and environmental pollution. This study presents an innovative solution to transform waste concrete and waste polyester fabric into recycled foamed concrete (RFC), which has excellent economic and environmental benefits. The research findings demonstrate that the addition of recycled powder can improve the compressive strength of foam concrete, while PET fiber reinforcement enhances durability. Recycled PET fiber shows better enhancement effects compared to PET fiber.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Rui Tang, Qunshan Wei, Kai Zhang, Shuai Jiang, Zhemin Shen, Yanxia Zhang, Christopher W. K. Chow
Summary: This study introduces an innovative solution to transform waste concrete and waste polyester fabric into recycled foamed concrete (RFC), with evaluations on the physical properties of different types of RFC. It found that recycled PET fiber has a better enhancement effect on RFC compared to PET fiber.
JOURNAL OF BUILDING ENGINEERING
(2022)
Review
Construction & Building Technology
Jawad Ahmad, Zhiguang Zhou
Summary: This study discusses various techniques to enhance the properties of natural fibers used in concrete and shows that incorporating fibers with synthetic fibers prioritized can promote environmentally friendly and long-term solutions in the construction industry. The study recommends using 1.0% fiber to improve the tensile capacity of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Bing Liu, Xuanyu Zhang, Junpeng Ye, Xiaoyan Liu, Zhiheng Deng
Summary: This study investigated the effect of microfibers and macrofibers on the mechanical properties of coral concrete. The results showed that both types of fibers can improve the mechanical properties, with microfibers mainly affecting the stage before macrocracks formation and macrofibers mainly exerting positive effects after macrocracks appeared. The hybrid addition of microfibers and macrofibers further enhanced the mechanical properties.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Shucheng Yuan, Kunpeng Li, Jiale Luo, Zhanyuan Zhu, Yusheng Zeng, Jiangfeng Dong, Wei Liang, Fengyu Zhang
Summary: This study evaluates the effects of incorporating basalt fiber (BF) on the mechanical properties and microstructure of recycled brick concrete aggregate concrete (RBAC). The results show that the addition of BF enhances the failure mode and compressive strength of RBAC. Additionally, the elastic modulus and compressive strength decrease with an increase in the recycled brick aggregate replacement ratio.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Amirhosein Sahraei Moghadam, Fereydoon Omidinasab, Mehdi Abdalikia
Summary: The study showed that the initial strength of recycled concrete aggregates (RCA) has a significant impact on the workability, quality, and mechanical properties of concrete. It is suggested that increasing the initial strength of RCAs and incorporating recycled steel fibers (RSF) can mitigate the negative effects. Multi-criteria optimization indicated that using 50% RCA with initial strength of 40 and 80 MPa, along with RSF, is justified in terms of several parameters including workability, quality, water absorption, mechanical properties, and economic aspects.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Guanzhi Liu, Nikola Tosic, Albert de la Fuente
Summary: The feasibility of using recycled aggregate and recovered fibers obtained from recycling polypropylene fiber-reinforced concrete in new concrete production was investigated in this study. The mechanical properties of different concretes were compared, showing that the recycled aggregate and recovered fibers can benefit the design-oriented properties of new concretes.
APPLIED SCIENCES-BASEL
(2023)
Review
Polymer Science
Zhenya Zhang, Yongcheng Ji, Dayang Wang
Summary: This paper reviews the research on the mechanical properties of fiber-reinforced recycled brick aggregate concrete. It demonstrates that the addition of fibers can strengthen the inherent deficits and deficiencies of concrete containing recycled aggregates and enlarge its application range. The effects of the content of broken brick and different categories and contents of fiber on the mechanical properties of recycled concrete are analyzed. The paper also presents the problems to be solved in research on the mechanical properties of fiber-reinforced recycled brick aggregate concrete and provides research suggestions and prospects. This review serves as a reference for further research in this field and the popularization and application of fiber-reinforced recycled concrete.
Article
Construction & Building Technology
Kangning Liu, Sheliang Wang, Xiaoyi Quan, Wei Duan, Zhao Nan, Tao Wei, Fan Xu, Binbin Li
Summary: The study aimed to investigate the compound effect of metakaolin (MK) and fiber on recycled aggregate concrete (RAC). It was found that MK had a positive effect on improving the mechanical properties and microstructure of RAC, and the combined effect of fiber and MK further enhanced the performance of RAC, especially in terms of mechanical properties. (c) 2021 Elsevier Ltd. All rights reserved.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
Yuanxun Zheng, Jingbo Zhuo, Peng Zhang, Mei Ma
Summary: This study evaluates the mechanical properties of basalt fiber-reinforced recycled aggregate concrete (BFRAC) at macro-micro-meso levels. The effects of different contents and lengths of basalt fiber (BF) on the mechanical properties of recycled aggregate concrete (RAC) are analyzed. Scanning electron microscopy (SEM) and energy-dispersive x-ray spectroscopy (EDS) are used to analyze the distribution of BF, bond between BF and matrix, failure form of BF, and element composition of the fiber interface transition zone. Numerical simulations of compression and splitting tensile tests are conducted, and the stress-strain curve and failure morphology of RAC under static loading are studied. The research results can be used as reference for the establishment of the RAC mechanical model and practical engineering application in the future.
JOURNAL OF CLEANER PRODUCTION
(2022)
Review
Construction & Building Technology
Xinglong Yao, Zhiyang Pei, Haoyuan Zheng, Qizhou Guan, Fupeng Wang, Shuo Wang, Yongcheng Ji
Summary: This study discusses the enhancement mechanism of various fibers on the mechanical properties, high-temperature resistance, and freeze-thaw cycle resistance of recycled aggregate concrete. The results indicate that fibers can significantly improve the flexural strength and tensile strength of recycled aggregate concrete and can also improve its performance at higher temperatures. Additionally, the type and content of fibers have an impact on the properties of recycled aggregate concrete and its resistance to freeze-thaw damage.
Article
Construction & Building Technology
Chunru Dong, Qingyang Zhang, Chuan Chen, Tianxun Jiang, Zhanggen Guo, Yi Liu, Shanli Lin
Summary: This study investigates the influence of waste plastic fibers and supplementary cementitious materials (SCMs) on the properties of recycled aggregate self-compacting concrete (RA-SCC). The results show that the combined addition of SCMs and recycled plastic fibers can greatly improve the workability and mechanical properties of the concrete.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Yuanxun Zheng, Jingbo Zhuo, Yamin Zhang, Peng Zhang
Summary: In this study, nano-SiO2 and basalt fiber were used to improve the quality of recycled aggregate concrete. The effects of different contents and lengths of basalt fiber on the mechanical properties of the concrete were analyzed, as well as the micro-composite effect between nano-SiO2 and basalt fiber. The study found that the optimum modified concentration of nano-SiO2 was 2%, and the optimum length and content of basalt fiber were 12 mm and 0.2%, respectively. The addition of basalt fiber significantly increased the compressive strength, splitting tensile strength, and flexural strength of the concrete.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Construction & Building Technology
Muhammad Ahmad Farooq, Muhammad Fahad, Babar Ali, Shahid Ullah, Mohamed Hechmi El Ouni, Ahmed Babeker Elhag
Summary: This study assessed the influence of recycled nylon fiber (RNF) on the properties of medium-strength concrete. The findings showed that higher volume fractions of RNF reduced the compressive strength, while recommended doses of RNF improved splitting-tensile strength and flexural-tensile strength. RNF also helped in minimizing water absorption and chloride penetration depth of the concrete.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Min Huang, Yuru Zhao, Haonan Wang, Shihao Lin
Summary: This study investigates the mechanical properties of basalt fiber reinforced recycled concrete (BFRRC) through a series of tests. It is found that the addition of basalt fiber significantly improves the compressive and flexural strength of recycled concrete, while the splitting tensile strength decreases with the increase of replacement ratio of recycled aggregates. The results provide valuable insights for the mix ratio of BFRRC.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Environmental Sciences
Maria Alice P. Cechinel, Thays de Oliveira Guidolin, Andresa Rodrigues da Silveira, Janaina dos Santos Tasca, Oscar Rubem Klegues Montedo, Sabrina Arcaro
Summary: Raw pyritic waste and pure pyritic waste were found to be effective catalysts for discoloration of organic dyes, with the latter demonstrating faster discoloration rate due to larger surface area. However, a decrease in discoloration efficiency was observed for pure pyritic waste after 6 cycles of use.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Construction & Building Technology
Patricia de Oliveira Piccolo, Alexandre Zaccaron, Luyza Bortolotto Teixeira, Elisangela Guzi de Moraes, Oscar Rubem Klegues Montedo, Antonio Pedro Novaes de Oliveira
Summary: A translucent ceramic was developed using porcelain stoneware paste modified with a frit to enhance translucency. The C06 composition showed superior translucency and stain resistance, making it suitable for ceramic tile production.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Materials Science, Ceramics
Mariana Borges Polla, Joao Lucas Nicolini, Janio Venturini, Alexandre da Cas Viegas, Marcos Antonio Zen Vasconcellos, Oscar Rubem Klegues Montedo, Sabrina Arcaro
Summary: A new approach to obtaining superparamagnetic magnetite nanoparticles through citrate-nitrate sol-gel synthesis and heat treatment is presented. The study found that decreasing the equivalence ratio can decrease the temperature required for magnetite formation, and the release rates of reducing gases influence the properties of the final product. The prepared iron oxide nanoparticles were in the magnetite phase and displayed excellent potential for biomedical and environmental applications.
CERAMICS INTERNATIONAL
(2023)
Article
Environmental Studies
J. Acordi, L. Simao, M. N. S. Faraco, C. H. Borgert, E. Olivo, O. R. K. Montedo, F. Raupp-Pereira
Summary: Mineral coal reserves are widely distributed and the extraction and processing of these reserves lead to the generation of large amounts of tailings. This study analyzes the valorization potential of these wastes in Brazil, using a circular economy perspective and a systematic classification-quantity-potentiality and feasibility-application criterion. The waste was classified as nonhazardous and noninert and showed similarities to raw materials used in construction materials manufacturing. The analysis indicated that coal tailings have great application potential in the construction sector, contributing to cleaner production and a more circular economy.
Article
Materials Science, Ceramics
Jordana Mariot Inocente, Renata Bochanoski da Costa, Ana Sonia Mattos, Rodrigo Moreno, Sabrina Arcaro, Oscar Rubem Klegues Montedo
Summary: This study presents the synthesis of low-CTE lithium aluminium silicate nanoparticles obtained through a colloidal approach using lithium acetate, silica, and alumina. The powders mainly consisted of beta-spodumene and beta-eucryptite phases, which showed a low CTE after thermal treatment. With some adjustments in the synthesis conditions, powders with even lower CTE could be obtained.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Vitor de Souza Nandi, Alexandre Zaccaron, Fabiano Raupp-Pereira, Sabrina Arcaro, Adriano Michael Bernardin, Oscar Rubem Klegues Montedo
Summary: This study investigated three different clays for producing clay-based structural products via fast drying. The optimal clay compositions were determined based on their plasticity and extrusion properties.
Article
Green & Sustainable Science & Technology
Diorgines Mattos Machado, Bruno Gambalonga Jr, Lisandro Sima, Manuel Joaquim Ribeiro, Oscar Rubem Klegues Montedo, Fabiano Raupp-Pereira, Sabrina Arcaro
Summary: The manufacturing and processing industries in Brazil are important for the economy but generate significant waste from natural resources, much of which is disposed of in industrial landfills. Extending the life cycle of industrial waste is essential for promoting sustainability. This study evaluated the solid industrial residue of foundry sand using the CPQvA system, which assesses environmental class, analyzes potential, identifies quantity and feasibility, and suggests applications. After assessing environmental impact and economic feasibility, asphalt mass, concrete blocks for civil construction, and hexagonal concrete blocks for interlocking pavement were found to be the most favorable for valorizing foundry sand.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Environmental
Bruno Gambalonga, Joao Lucas Nicolini, Jordana Mariot Inocente, Claus Troger Pich, Elidio Angioletto, Fabiano Raupp Pereira, Oscar Rubem Klegues Montedo, Sabrina Arcaro
Summary: This study aims to evaluate the value of metal smelting waste foundry sand (WFS) as an aggregate in hot-mix asphalt mixtures (HMA) using systematic criteria. The results showed that a composition containing 10 wt% of waste foundry sand was suitable for recovery into HMA.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Chemistry, Physical
Laura Silvestro, Caroline Maroli, Brenda Koch, Artur Spat Ruviaro, Geannina Lima, Mariane Kempka, Camila Fabiano de Freitas Marin, Daniela Zambelli Mezalira, Philippe Jean Paul Gleize
Summary: This study evaluated the impact of different Nb2O5 concentrations on parameters such as rheological characteristics, hydration kinetics, compressive strength, and photocatalytic activity in cement pastes. The inclusion of Nb2O5 increased the yield stress and viscosity of the pastes, but did not significantly affect hydration kinetics or compressive strength. Interestingly, the degradation of RhB in the presence of cement-based materials was not dependent on light but on the production of superoxide anion radicals.
Article
Geochemistry & Geophysics
Cleidson Alves, Fernando Pelisser, Joao Labrincha, Rui Novais
Summary: Lightweight geopolymers have been studied and used in specific applications due to their unique properties and lower environmental impacts. In this study, lightweight geopolymers using metakaolin, sodium silicate, sodium hydroxide, and hydrogen peroxide (H2O2) were evaluated. The effects of H2O2 concentration on various properties were determined, and a thermal conductivity simulation was performed for cladding panels. The results showed that mortars with a H2O2 concentration of 0.2% had a compressive strength of 18 MPa and a thermal conductivity of 0.55 W/mK, which was 60% lower than the reference composition.
Article
Construction & Building Technology
Luis Urbano Durlo Tambara Jr, Paulo Ricardo de Matos, Geannina dos Santos Lima, Laura Silvestro, Janaide Cavalcante Rocha, Carlos Eduardo Maduro de Campos, Philippe Jean Paul Gleize
Summary: This study investigated the impact of three types of nanosilica on the hydration, strength, and microstructure of calcium sulfoaluminate cement pastes with and without a superplasticizer. The results showed that powdered nanosilica delayed cement hydration, while colloidal nanosilica had little effect. The superplasticizer improved the dispersion of cement particles and increased the degree of hydration. However, when the superplasticizer was used with powdered nanosilica, it hindered cement hydration, while it had little effect on the system with colloidal nanosilica. The SEM images indicated that the superplasticizer altered the morphology of ettringite and negatively affected the mechanical strength of the cement pastes.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Maria Alice Prado Cechinel, Joao Lucas Nicolini, Pedro Monteiro Tapia, Edgar Andres Chavarriaga Miranda, Sarah Eller, Tiago Franco de Oliveira, Fabiano Raupp-Pereira, Oscar Rubem Klegues Montedo, Tiago Bender Wermuth, Sabrina Arcaro
Summary: In this study, cobalt ferrite spinel was used for the first time as a catalyst in the Fenton process to degrade Remazol Red RR dye in water. By evaluating its structural, surface optics, magnetic properties, and optimal Fenton reagent conditions, the potential of CoFe2O4 as an effective catalyst for dye degradation was demonstrated.
Article
Materials Science, Multidisciplinary
Emilia J. Fensterseifer, Marcelo M. Lima, Philippe J. P. Gleize, Paulo R. de Matos, Erich D. Rodriguez
Summary: Rheology is a powerful tool for accurately assessing the fresh properties of cementitious systems. This study evaluates the effect of testing conditions on the measurement of the rheological properties of fly ash-based geopolymer paste, and finds that different testing geometries and shear rate increments have a significant impact on the results.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Environmental
Thays de Oliveira Guidolin, Kelvin Goularte dos Santos, Oscar Rubem Klegues Montedo, Fabiano Raupp Pereira, Sabrina Arcaro, Maria Alice P. Cechinel
Summary: This study investigated the use of pyritic waste as a catalyst for the discoloration of textile effluents. The particle size and pre-treatment of the catalyst were found to affect the efficiency of the discoloration process. The results showed that the catalyst concentration, H2O2 concentration, and reaction time were important factors in achieving optimal discoloration. The study also revealed the stability of the catalyst and its potential environmental benefits.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Taylana Piccinini Scolaro, Laura Silvestro, Artur Spat Ruviaro, Afonso R. G. de Azevedo, Sergio Neves Monteiro, Fernando Pelisser
Summary: The study found that incorporating 10 wt.% of ornamental stone waste into ordinary Portland cement can achieve similar rheological and mechanical properties as plain cement while reducing CO2 emissions.