Article
Construction & Building Technology
Andres Antonio Torres-Acosta, Alberto Patron-Solares, Pablo Alcantara-Lagunes
Summary: A new methodology for durability health monitoring during bridge construction using concrete indicators was developed and compared with data from in-service bridges. Results showed excellent correlations and empirical models confirmed the feasibility of using saturated electrical resistivity test for structural health monitoring, instead of more complicated and expensive methods.
STRUCTURAL CONTROL & HEALTH MONITORING
(2021)
Article
Construction & Building Technology
Luping Tang, Dimitrios Boubitsas, Liming Huang
Summary: This study examined the long-term performance of different concrete mixes in a highway environment with de-icing salt. The results showed that chloride penetration was weaker compared to marine splash environments. The estimated critical chloride content for corrosion initiation was found to be around 0.3% by mass of binder. The ClinConc model was modified to better describe chloride profiles in the concrete at this exposure site.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Wichian Chalee, Tieng Cheewaket, Chai Jaturapitakkul
Summary: The research demonstrated that concrete specimens containing 15-35% replacement levels of GPOFA exhibit the best durability performance at marine sites, with higher resistance to chloride ingress and steel corrosion compared to ordinary Portland cement concrete.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Construction & Building Technology
Andre Valente Monteiro, Arlindo Goncalves
Summary: This article presents a probabilistic methodology based on a frequentist approach for assessing the limit state of depassivation of concrete structures. It introduces the concept of passivation curve, providing a valuable tool for decision-making in the life-cycle management of concrete structures. The article also discusses the experimental and code requirements for condition assessment and the physical interpretation of passivation probability.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Bayezid Baten, Tanvir Manzur, Tafannum Torsha, Shaurav Alam
Summary: This study focused on evaluating the corrosion vulnerability of different concrete mix designs in chloride prone environment through a probabilistic approach, considering uncertainties of various factors. It was found that correlations between supplementary binders and mix design parameters could be utilized to develop generalized guidelines for estimating corrosion risks efficiently.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
Amit Kenny, Ela Ofer Rozovsky
Summary: This study examined the properties of ecological concrete taken from a submerged breakwater in the East Mediterranean Sea. It was found that the biogenic carbonate cover on the concrete surface reduced the diffusion of chloride ions and carbonation rate, without negatively affecting the compressive strength.
Article
Construction & Building Technology
Vute Sirivivatnanon, Caihong Xue, Radhe Khatri
Summary: This study compared the chloride-induced corrosion of low carbon concrete with a high volume of supplementary cementitious materials in three different corrosion environments. The results showed inconsistent rankings in the corrosion resistance of binders under accelerated corrosion tests with different voltage applications. However, electrochemical measurements confirmed the advantage of 30% fly ash blended cement concrete in protecting reinforcement. Overall rating: 7/10.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Marine
Rusheng Qian, Qiang Li, Chuanqing Fu, Yunsheng Zhang, Yixuan Wang, Xianyu Jin
Summary: This study investigated the chloride corrosion of steel-reinforced concrete structures in a marine environment through a 7-year exposure experiment. The results showed that the accumulation of chloride ions was related to the carbonation depth and frontier of the concrete surface. Further research is needed to understand the effects of slag on chloride ions.
Article
Construction & Building Technology
Sofia Real, Jose Alexandre Bogas, Jorge Pontes
Summary: This study characterises the chloride penetration into structural lightweight aggregate concrete after a 5-year exposure period to aggressive marine conditions. The results suggest that LWAC can present similar durability as NWAC, but with differences in surface chloride content. Existing models did not accurately predict the chloride penetration profiles observed in the study.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Valentina Millano-Gonzalez, Oladis Troconis de Rinco, Andres A. Torres-Acosta, Miguel A. Sanchez Gomez, Pedro Castro-Borges, Jose T. Perez-Quiroz, Tezozomoc Perez-Lopez, Rosa Vera, Manuela Salta, Miguel Pedron
Summary: This research evaluated the corrosion situation of reinforced concrete specimens in different environments. The results showed that corrosion was more severe in tropical environments.
Article
Construction & Building Technology
Jierong Cao, Zuquan Jin, Qingjun Ding, Chuansheng Xiong, Gaozhan Zhang
Summary: This study investigates the convection zone of concrete in marine tidal environments, revealing that the dry/wet ratio has a significant impact on the onset and development of the convection zone. Additionally, concrete containing GGBS and fly ash can lower the peak chloride concentration but does not retard the convection zone development compared to Portland cement concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Robert E. Melchers, Igor A. Chaves
Summary: The study case found that concrete structures reinforced with steel can display excellent long-term durability even in harsh conditions, but attention should be paid to ensure sufficient concrete compaction to prevent localized corrosion, and the use of blast furnace slag and other aggregates may contribute to enhancing the structure's durability.
Article
Construction & Building Technology
Sumit Joshi, Young-Ho Ahn, Shweta Goyal, M. Sudhakara Reddy
Summary: The performance of bacterial-treated concrete structures under harsh conditions such as carbonation and chloride exposure was investigated in this study. Bacterial-treated specimens showed improved mechanical strength and reduced penetration properties. The results indicated that these specimens resisted from the deterioration effects of chloride and carbonation exposure and improved their durability properties.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Zhihua Liu, Liqin Gan, Hui Rong
Summary: Laboratory-simulated microbially induced corrosion was conducted to evaluate the durability of concrete in seawater. Sulphur-oxidizing bacteria (SOB) were used in the biotic test group (BTG) specimens, while the abiotic control group (ACG) specimens did not contain SOB. The BTG specimens exhibited severe deterioration with pitting and material losses, while the ACG specimens only showed slight weathering and breakage. The study also found that the biological effects caused concrete dissolution, crystalline swelling, and increased porosity, leading to concrete deterioration.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sumit Chakraborty, Romio Mandal, Subrata Chakraborty, Maurizio Guadagnini, Kypros Pilakoutas
Summary: The study investigates the sulfate and chloride resistance of cement composites manufactured using electrolyzed water, showing that the electrolyzed water-based specimens exhibit enhanced durability performance with reduced compressive strength losses and corrosion potential compared to control specimens. This improvement is attributed to the less porous and compact microstructure of the hardened composites, leading to lower ingress of deleterious agents.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Construction & Building Technology
Valdith Lopes Jeronimo, Gibson Rocha Meira, Luiz Carlos Pinto da Silva Filho
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Raphaele Malheiro, Aires Camoes, Gibson Meira, Maria Teresa Amorim, Joao Castro-Gomes, Rui Miguel Ferreira
MATERIA-RIO DE JANEIRO
(2018)
Article
Construction & Building Technology
Raphaele Malheiro, Aires Camoes, Gibson Meira, Maria Teresa Amorim
Summary: An experimental investigation was conducted to understand the effect of chloride on the carbonation front. Results show that the presence of chloride decreases the carbonation front in cement based materials, possibly due to pore refinement and humidity retention caused by chloride. The impact on carbonation reduction varies according to the testing method used.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
M. R. Carvalho, G. R. Meira, P. R. R. Ferreira, M. Medeiros
Summary: This study investigates the effectiveness of realkalisation treatment on reinforcement repassivation using simulated concrete pore solution. The results suggest that higher alkaline media are more beneficial for reinforcement repassivation after realkalisation. Furthermore, there is a limit of 28 days of reinforcement exposure to corrosion from which repassivation becomes more difficult to achieve. The effectiveness of realkalisation can be analysed using the parameters E-index and i-index, which decrease with exposure time and corrosion depth.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Review
Construction & Building Technology
Daniela E. Angulo Ramirez, Gibson Rocha Meira, Marco Quattrone, Vanderley M. John
Summary: A metaanalysis was conducted to study the corrosion current density (icorr) in carbonated concrete, revealing a higher icorr than expected, especially in low-binder concretes. Concrete resistivity was found to be the most important factor related to icorr in carbonated concrete, reflecting moisture content and pore saturation conditions better than external relative humidity. Further research on the relationship between icorr, carbonation degree, microstructure, residual alkalinity, and resistivity in low-binder concretes is needed.
CEMENT & CONCRETE COMPOSITES
(2023)
Proceedings Paper
Construction & Building Technology
Gibson Meira, Pablo Ferreira
Summary: This paper analyses the influence of height on the vertical distribution of marine aerosol salinity. It considers altitudes between 1.5 and 10 m from the ground in a region under the major influence of surf produced aerosol and its impact on chloride accumulation into concrete over time. Results show that the rate of chloride deposition decreases with increasing altitude and this trend can be described by a power decay function. The decrease in salinity with altitude has significant implications for chloride accumulation in concrete and can exceed 50% after 50 years of exposure. Therefore, this behavior should be taken into account when analyzing the performance of vertical concrete structures in marine atmospheres.
PROCEEDINGS OF THE 75TH RILEM ANNUAL WEEK 2021
(2023)
Article
Materials Science, Multidisciplinary
Robson Arruda dos Santos, Gibson Rocha Meira, Wesley Vitor Dantas de Carvalho Bezerra, Francisco Alisson Vieira Braga, Dayvison Leoncio de Pontes
Summary: Optimizing particle packing can reduce the cement content in concrete without loss of performance, the study found that the q values directly affect the fine aggregate content in the mixture, with lower q values favoring higher fine aggregate contents, and there is a certain value below which the sand content increases. Concretes with superior packing showed better performance in terms of compressive strength and binder intensity.
MATERIA-RIO DE JANEIRO
(2021)
Proceedings Paper
Engineering, Multidisciplinary
Raphaele Malheiro, Aires Camoes, Gibson Meira, Joao Pinto
13TH INTERNATIONAL CONFERENCE INTERDISCIPLINARITY IN ENGINEERING (INTER-ENG 2019)
(2020)
Proceedings Paper
Construction & Building Technology
Gibson R. Meira, Taissa G. Candido, Mariane R. Carvalho, Pablo R. R. Ferreira, Carla C. Araujo
XIV INTERNATIONAL CONFERENCE ON BUILDING PATHOLOGY AND CONSTRUCTIONS REPAIR
(2018)
Article
Construction & Building Technology
Malheiro Raphaele, Aires Camoes, Gibson Meira
REVISTA ROMANA DE MATERIALE-ROMANIAN JOURNAL OF MATERIALS
(2018)
Article
Multidisciplinary Sciences
P. R. R. Ferreira, G. R. Meira, D. C. Barbosa, M. Carvalho, J. Andrade
Article
Construction & Building Technology
G. R. Meira, W. T. A. Pinto, E. E. P. Lima, C. Andrade
CONSTRUCTION AND BUILDING MATERIALS
(2017)
Article
Construction & Building Technology
Raphaele Malheiro, Gibson Rocha Meira, Munique Lima
REVISTA DE LA CONSTRUCCION
(2016)
Proceedings Paper
Construction & Building Technology
Raphaele Malheiro, Gustavo Camacho, Aires Camoes, Gibson Meira, Teresa Amorim, Rui M. Ferreira, Rui Reis
II INTERNATIONAL CONFERENCE ON CONCRETE SUSTAINABILITY - ICCS16
(2016)
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)