Article
Energy & Fuels
Rengguang Liu, Yan Li, Tao Du, Shiming Zhou, Peiqing Lu, Yongliang Wang
Summary: Neat well cement experiences significant strength retrogression at high temperatures due to insufficient hydration and the presence of larger pores in the microstructures. Molecular dynamics simulations reveal that reducing the calcium/silicon ratio can improve hydration and strength. The failure of the calcium silicate hydrate (C-S-H) structure at high temperatures is mainly due to the disassembling of the calcium oxygen layers, leading to decreased strain energy consumption and worse performance.
Article
Construction & Building Technology
Guler Fakhraddin Muhyaddin, Diler Sabah Asaad
Summary: Boron-activated high belite cement is a promising alternative to ordinary Portland cement, offering energy savings and decreased environmental impact. However, its practical use in industry is limited without satisfactory durability.
MATERIALS AND STRUCTURES
(2022)
Article
Construction & Building Technology
Sumit Srivastava, Ruben Snellings, Vera Meynen, Pegie Cool
Summary: This study investigates the carbonation-cementation and bulk reaction mechanisms in systems with different Ca(OH)2 content, CO2 pressure, and temperature, leading to the formation of solid solutions of the (CaxFe1-x)CO3 series minerals and varying product morphologies and cementation performances. Additionally, the exceptional formation of Fe-LDH and (Ca,Fe)-LDH has been observed in some systems, which remained stable even after being exposed to ambient conditions for over 75 days.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Engineering, Chemical
Le Quynh Hoa, Ralph Baessler, Dirk Bettge, Enrico Buggisch, Bernadette Nicole Schiller, Matthias Beck
Summary: Representative low-cost materials were embedded in mortar to mimic the casing-mortar interface in injection wells. Two types of cement were investigated for their corrosion resistance, and exposure tests revealed unexpected corrosion types on steel surfaces. Surface analysis and element mapping were used to trace chloride intrusion and corrosion process on exposed specimens.
Review
Chemistry, Multidisciplinary
Seyed Hasan Hajiabadi, Mahmoud Khalifeh, Reinier van Noort, Paulo Henrique Silva Santos Moreira
Summary: This review paper explores the potential of geopolymer (GP) systems as alternative sealants in wellbores exposed to CO2 during carbon capture and storage (CCS) operations. Key parameters that control the mechanical properties, permeability, and chemical durability of GPs are discussed, along with existing knowledge on the use of GPs as wellbore sealants and the challenges that need to be addressed. The review shows that GPs have great potential as alternative wellbore sealant materials in CCS due to their corrosion durability, low matrix permeability, and good mechanical properties, but further research is needed to optimize their use.
Article
Chemistry, Physical
Alexander G. Domantovsky, Kirill A. Emelyanenko, Alexandre M. Emelyanenko, Ludmila B. Boinovich
Summary: This study investigates the degradation mechanisms of superhydrophobic coatings under high ozone concentrations and reveals that the degradation rate is higher under dynamic conditions compared to nearly static conditions. Factors such as degradation of the hydrophobic agent layer, mechanical deterioration of texture, ozone adsorption, and contact with water play a significant role in the behavior of superhydrophobic coatings.
Article
Construction & Building Technology
Chattarika Phiangphimai, Gonganok Joinok, Tanakorn Phoo-ngernkham, Nattapong Damrongwiriyanupap, Sakonwan Hanjitsuwan, Cherdsak Suksiripattanapong, Piti Sukontasukkul, Prinya Chindaprasirt
Summary: This study examines the feasibility of using alkali-activated/cement powder paste as a coating material for structures exposed to marine environments. The results show that the alkali-activated/cement powder paste has enhanced durability and protection against damage and corrosion.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Energy & Fuels
Amir Jahanbakhsh, Qi Liu, Mojgan Hadi Mosleh, Harshit Agrawal, Nazia Mubeen Farooqui, Jim Buckman, Montserrat Recasens, Mercedes Maroto-Valer, Anna Korre, Sevket Durucan
Summary: The study aimed to investigate the interactions between CO2-brine and cement-caprock/reservoir rock through a series of experiments simulating deep wellbore environments. The results showed significant changes in permeability and mechanical properties of the composite samples after exposure to CO2-rich brine.
Article
Construction & Building Technology
Chen Liang, Piqi Zhao, Lu Liu, Shuo Wang, Shoude Wang, Konstantin Sobolev, Lingchao Lu
Summary: The study successfully developed a hydrophobic emulsion for cement-based materials, which significantly improves the durability and exhibits water repellent properties and corrosion resistance.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
N. T. Dung, R. Hay, A. Lesimple, K. Celik, C. Unluer
Summary: This study found that the microstructural and mechanical properties of reactive MgO cement concrete are enhanced as the CO2 concentration increases. 5-20% CO2 led to a 5-fold increase in compressive strength, but samples cured under 20% CO2 showed limitations on further CO2 diffusion. The use of 5% CO2 produced comparable strengths at 28 days as 20% CO2, while samples cured under 10% CO2 exhibited the best performance.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Environmental Sciences
Qazi Amjad Ali Pathan, Abdul Sami Qureshi, Sajjad Ali Mangi
Summary: The study examines the effect of ageing factors on service life modelling of fly ash cement concrete (FACC) and finds significant variations in the predicted results. More reliable modelling results are needed for reinforced concrete structures in chloride environments, such as the recent failure of the Miami Building in the USA.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Construction & Building Technology
Yihang Zhang, Mingbiao Xu, Jianjian Song, Chunli Wang, Xiaoliang Wang, Bahati Adnan Hamad
Summary: This study investigates the carbonation behavior and phase change relationship of oil well cement paste under high- and ultra-high temperature using indoor simulation experiments. It explores the performance change and weight ratio of cement paste under different influence parameters and develops a corrosion process prediction model suitable for practical engineering applications.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Hao Yao, Zonglin Xie, Chuhan Huang, Qiang Yuan, Zhiwu Yu
Summary: This paper provides a comprehensive review on the latest advances of hydrophobic cement-based materials, including assessment methods, modification strategies, and effects on durability and mechanical properties. Key scientific problems and challenges in this field are concluded, with future research directions proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Claire L. Corkhill, Colleen Mann, Jeremy R. Eskelsen, Donovan N. Leonard, Lucy M. Mottram, Martin C. Stennett, Jennifer M. S. Ayling, Clare L. Thorpe, Max R. Cole, Sarah Nicholas, Ryan Tappero, Eric M. Pierce
Summary: The mechanisms and kinetics of corrosion of a Mg-rich alkali aluminoborosilicate glass simulating UK high-level waste were investigated during dissolution in synthetic cement solutions. The dissolution process varied with the pH and alkaline earth content of the cement solutions. High resolution microscopy and spectroscopy techniques provided insights into the interface between the glass and the cement solutions. Different reaction products and precipitation phases were observed. These findings are important for the final disposition of radioactive waste glasses.
NPJ MATERIALS DEGRADATION
(2022)
Article
Construction & Building Technology
Jinxin Wei, Kim Hung Mo, Tung-Chai Ling
Summary: This study aims to improve our understanding of the pH evolution and further hydration of carbonated cement pastes at different depths upon subsequent standard curing. The results showed that the pH value of cement pastes with a water-cement ratio of 0.3 remained above 12.0 after CO2 curing, while the pH value of the outer layer in the carbonated cement pastes with a water-cement ratio of 0.4 decreased to 11.6. However, with subsequent standard curing, the pH of both specimens increased significantly.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Jinliang Liu, Yao Wang
Summary: A prediction model was developed to quantify the effect of fly ash on chloride diffusion in concrete samples, using the GSC method and Papadakis model for calculations. Experimental validation showed that the model successfully characterizes the impact of fly ash on chloride diffusion in concrete.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Energy & Fuels
Jinliang Liu, Yuxiang Jing, Linfei Li
Summary: In this study, a model was developed to consider the coupling effect of carbonation reaction and chloride diffusion, which is of great significance in CO2 underground storage.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Materials Science, Composites
Jinliang Liu, Xincheng Su, Fangpu Yan
Summary: This study investigates the application of geopolymer adhesive in CFRP-strengthened RC structures and examines the bonding behavior. The optimal proportion of the geopolymer adhesive is obtained through orthogonal tests. A series of adhesively bonded joints are fabricated and tested, and bondslip models are developed for analysis.
POLYMER COMPOSITES
(2022)
Article
Engineering, Multidisciplinary
Jinliang Liu, Fangpu Yan
Summary: This paper studied the flexural performance of reinforced concrete beams strengthened with CFRP, focusing on the effects of geopolymer adhesive, the number of CFRP layers, and the width of pre-crack. The flexural capacity of the strengthened beams was calculated theoretically. Test results showed that the flexural capacity of epoxy resin adhesive CFRP strengthened reinforced concrete beams was 7.76% higher than those strengthened with geopolymer adhesive. Beams strengthened with three layers of CFRP had a flexural capacity 1.86% higher than those with two layers. The test data showed good agreement with the theoretical calculations. This study provides important data support for the popularization and application of the new environmentally-friendly reinforcement technology.
INTERNATIONAL JOURNAL OF STRUCTURAL INTEGRITY
(2022)
Article
Materials Science, Multidisciplinary
Jinliang Liu, Fangpu Yan
Summary: In this study, numerical simulations were conducted using Abaqus and compared with experimental data to analyze the effects of different parameters on the load capacity of reinforced beams. The results showed that the pre-crack height, pre-crack spacing, and strength of the geopolymer adhesive significantly influenced the cracking load and ultimate load of the beams.
MULTIDISCIPLINE MODELING IN MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Baocheng Liu, Jinliang Liu, Yanqian Wen, Qinglin Hu, Liang Liu, Shili Zhao
Summary: The shear and bending performance of CFRP-strengthened beams bonded by geopolymers and epoxy were investigated through static loading tests and finite element analysis. The results showed that geopolymer-CFRP-strengthened beams had similar or even better bearing capacity and stiffness compared to epoxy-CFRP-strengthened beams.
INTERNATIONAL JOURNAL OF STRUCTURAL INTEGRITY
(2022)
Article
Materials Science, Multidisciplinary
Jinliang Liu, Xincheng Su
Summary: This article investigates the effects of failure mode and strain conditions of CFRP, concrete, and stirrups on the shear capacity of reinforced beams bonded by geopolymer and epoxy. A prediction model for the ultimate bearing capacity of CFRP-shear-strengthened beams is proposed, considering adhesive performance parameters and FRP width parameters. Experimental results show that the failure modes of CFRP-strengthened beams bonded by geopolymer are a combination of CFRP-concrete interface substrate failure and fracture failure of CFRP, while for epoxy, it is localized substrate failures with a small area. The ultimate load of CFRP-strengthened beams is directly influenced by the failure modes.
MULTIDISCIPLINE MODELING IN MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Civil
Jinliang Liu, Wei Zhao, Xincheng Su, Xuefeng Xie
Summary: This paper studied the ternary geopolymer concrete (TGC) using granulated blast furnace slag, fly ash, and zeolite powder as binders, activated with sodium silicate solution. The results showed that increasing alkali content and decreasing alkaline activator modulus had positive effects on the mechanical properties of TGC. Compared to ordinary Portland cement, TGC had higher flexural tensile strength but lower elastic modulus at the same compressive strength. Appropriate prediction models for flexural tensile strength and elastic modulus of TGC were proposed based on compressive strength, and fitting models considering the effects of alkali content and alkaline activator modulus were also proposed.
FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Jinliang Liu, Xincheng Su
Summary: This paper investigates the effects of CFRP reinforcement form, adhesive type, and pre-crack width on the failure mode, shear capacity, deflection response, CFRP strain response, and crack patterns of strengthened specimens. The findings indicate that there are two failure modes for different structural properties of specimens, i.e., CFRP-concrete interface substrate failure and CFRP fracture failure. The U-shaped CFRP-strengthened beams show improved shear capacity, ultimate deflection, and bending stiffness compared to the complete-wrapping CFRP-strengthened beams. The proposed finite element model effectively evaluates the mechanical characteristics of CFRP-strengthened RC beams.
INTERNATIONAL JOURNAL OF STRUCTURAL INTEGRITY
(2023)
Article
Construction & Building Technology
Wei Zhao, Jinliang Liu, Huanyu Guo, Linfei Li
Summary: This paper investigates the water absorption and crushing index of recycled coarse aggregate (RCA) soaked in nano-SiO2 (NS-RCA), and studies the mechanical properties of recycled aggregate concrete (RAC) prepared with NS-RCA (NS-RAC). The study proposes a modified stress-strain model for NS-RAC, considering the concentration of nano-SiO2 and soaking time. The results show that the concentration of nano-SiO2 and soaking time significantly affect the strength and durability of RCA and the mechanical properties of RAC. The modified NS-RAC exhibits higher compressive strength, flexural strength, and elastic modulus compared to unmodified RAC.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Jinliang Liu, Wenjie Zhao, Linfei Li
Summary: This study aims to prepare rice straw fiber reinforced concrete (RSFRC) by grafting Nano-SiO2 on the surface of rice straw fibers, and evaluate the interface properties of silica grafted fibers with cement. The results show that straw fibers grafted with Nano-SiO2 significantly improve the mechanical and fatigue properties of RSFRC, with a 14.6% increase in compressive strength, 22.3% increase in flexural strength, and 87.1% increase in abrasion resistance compared to ordinary RSFRC.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Liu Jin-liang, Jia Yan-min
CIVIL ENGINEERING JOURNAL-STAVEBNI OBZOR
(2019)
Article
Materials Science, Multidisciplinary
Jinliang Liu, Yanmin Jia, Guanhua Zhang, Jiawei Wang
MULTIDISCIPLINE MODELING IN MATERIALS AND STRUCTURES
(2019)
Article
Engineering, Multidisciplinary
Jinliang Liu, Yanmin Jia
INTERNATIONAL JOURNAL OF STRUCTURAL INTEGRITY
(2019)
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)
