Article
Engineering, Civil
Rubaiya Rumman, Meraj Rubayat Kamal, Tanvir Manzur, Munaz Ahmed Noor
Summary: This study aims to investigate the impact of different supplementary cementing materials on the carbonation and chloride penetrability of concrete. Based on the experimental results, an optimal proportion of 20% replacement of cement has been proposed, and the preliminary service life has been estimated. This is of significant importance for the durability and cost-effectiveness of concrete structures.
Article
Multidisciplinary Sciences
Ginneth Patricia Millan Ramirez, Hubert Bylinski, Maciej Niedostatkiewicz
Summary: This paper assesses the performance of different coatings in saltwater and regular water, and evaluates the pull-off adhesion strength of coatings applied to concrete slabs dried with different processes. The results show that epoxy coatings demonstrate the best performance in terms of pull-off adhesion strength, water absorption rate, and carbonation rate.
SCIENTIFIC REPORTS
(2022)
Article
Construction & Building Technology
Neusa Ap. Munhak Beltrame, Roberto Luiz Dias, Franky Bruno Witzke, Ronaldo A. Medeiros-Junior
Summary: This study evaluated the effect of carbonation curing on the physical, mechanical, and microstructural properties of metakaolin-based geopolymer concrete. The results showed that carbonation curing did not affect compressive strength but improved pore structure and reduced water absorption.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Zhidong Zhang, Ueli Angst
Summary: This study investigated the effects of cellulose nanofibrils (CNFs) on the durability of carbonated cement-based materials. The results showed that increasing the dosage of CNFs can reduce the impact of carbonation on cement-based materials, preserving more hydration products in the carbonated materials. In addition, CNFs can weaken the coarsening effect of carbonation on pore structure and reduce the microstructural damage caused by carbonation.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Construction & Building Technology
Liang Li, Qiong Liu, Min Wu
Summary: This study investigated the carbonation of cement mortars with different conditions and found that increasing CO2 concentration can improve compressive strength gain and carbonation shrinkage rate. Accelerated carbonation treatment can reduce gas permeability and water absorption of mortars. Higher carbonation temperature can enhance early-age strength gain but may compromise it when extended.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Engineering, Mechanical
Xiguang Liu, Erhao Ma, Jun Liu, Binqiang Zhang, Ditao Niu, Yan Wang
Summary: The study conducted a multi-faceted test on a reinforced concrete wet quenching tower across height and depth, and proposed an improved carbonation depth model, showing significant unevenness in carbonation depth and compressive strength of the concrete under high temperature and dry-wet cycle conditions.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Civil
Xiao-Wei Zheng, Hong-Nan Li, Paolo Gardoni
Summary: This study presents a probabilistic methodology to assess the annual damage probability of high-rise buildings considering carbonation-induced corrosion and uncertainties associated with seismic excitations. The results show significant impacts of carbonation-induced corrosion on structural performances. The necessity of comprehensively discussing the detrimental effects of harsh environments on high-rise buildings is highlighted to avoid erroneous predictions of damage probabilities.
ENGINEERING STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Farah Kaddah, Harifidy Ranaivomanana, Ouali Amiri, Emmanuel Roziere
Summary: The accelerated carbonation of recycled concrete aggregates has been suggested as a way to improve their properties. This study investigates the effects of carbonation on cement paste and mortar specimens at different scales. The results show that carbonation leads to the precipitation of different minerals and the development of material stiffness, which in turn affects the microcracking and permeability of the specimens. The formation of calcium carbonate also reduces the porosity and pore sizes.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Construction & Building Technology
Aoao Zhu, Xin Zhang, Rongwei Yang, Changlong Wang
Summary: In saline soil or salt lake regions, the deterioration mechanism of cement-based materials exposed to the combined action of salt attack, carbonation, and cyclic wetting-drying remains unclear. This study utilizes various techniques to uncover the deterioration mechanism of hardened cement paste exposed to sulfate salt or sulfate-chloride salt attack, natural or accelerated carbonation, and cyclic wetting-drying. The results indicate that the deterioration mechanism of hardened cement paste varies depending on the concentration of carbon dioxide, with chemical sulfate attack dominating under natural carbonation and C-S-H decomposition and gypsum formation being the main mechanisms under accelerated carbonation. The presence of sodium chloride inhibits both sulfate and carbonation attack on hardened cement paste.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Computer Science, Interdisciplinary Applications
Chandra Harshitha, Bhaskar Sangoju, Ramesh Gopal
Summary: Corrosion of rebar is a significant deteriorating mechanism affecting the durability of reinforced concrete structures. This study aims to modify the carbonation depth prediction empirical model and verify it using carbonation data from selected RC structures and literature. The effectiveness of the oxygen permeability index (OPI) test in estimating carbonation depth in laboratory specimens and in-situ structures is also explored. The modified empirical model shows good correlation with measured carbonation depth, and the OPI test proves to be a suitable method for assessing carbonation depth in both new and existing RC structures.
COMPUTERS AND CONCRETE
(2023)
Review
Engineering, Environmental
Dhanalakshmi Padmaraj, Dali Naidu Arnepalli
Summary: Carbonation is a harmful reaction in lime-stabilized earthworks as it leads to lime consumption, compromises the stability of cementitious phases, and affects the cohesion and shear strength of stabilized clays. Despite extensive research on the carbonation mechanism in cement and concrete, the understanding of carbonation in lime-treated soils is limited.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Geochemistry & Geophysics
Wang Changhao, Zhang Ling, Li Shibin, Zhao Huizhi, Liang Kai, Wang Xiaoming, Wang Chunhua
Summary: This study investigates the effect of drilling fluid action time on the physical and mechanical properties of shale and establishes equations relating the parameters. Experimental and numerical simulation results show that the fluid absorption rate, dynamic elastic parameters, and rock deterioration vary with immersion time. Based on the findings, a safe drilling fluid density window is proposed for the target interval.
Article
Construction & Building Technology
Han Zhu, Fuqiang Duan, Jian-wen Shao, Wanwan Shi, Zhicheng Lin
Summary: In early August 2006, a CRC bridge deck was constructed in a suburb of Tianjin, China, marking the first reported application of such technology. More than 10 years later, the deck was found to be in good condition with little deterioration in material properties. Various tests and evaluations were carried out, showing no major issues.
MAGAZINE OF CONCRETE RESEARCH
(2021)
Article
Construction & Building Technology
Duo Zhang, Brian R. Ellis, Beata Jaworska, Wei-Hsiu Hu, Victor C. Li
Summary: The study demonstrates that ECC can sequester CO2 through carbonation curing while increasing the material's strength and ductility, which has potential environmental significance for precast construction elements.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Yang Zhou, Zechuan Peng, Luchuan Chen, Jiale Huang, Tao Ma
Summary: The addition of lactates effectively improves the mechanical performance, water impermeability, and carbonation resistance of supersulfated cement concrete, while the addition of sodium hydroxide does not enhance the performance.
CEMENT & CONCRETE COMPOSITES
(2021)
