Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Social and Behavioral Sciences (5571)
- Library and Information Science (3661)
- Arts and Humanities (2258)
- Engineering (1827)
- Education (1588)
-
- Comparative Literature (1383)
- Physical Sciences and Mathematics (814)
- Communication (693)
- Feminist, Gender, and Sexuality Studies (643)
- American Studies (642)
- Rhetoric and Composition (640)
- Film and Media Studies (599)
- European Languages and Societies (596)
- Critical and Cultural Studies (592)
- Reading and Language (592)
- Other Arts and Humanities (583)
- Computer Sciences (560)
- Theatre and Performance Studies (524)
- Other Film and Media Studies (520)
- Television (504)
- Life Sciences (471)
- Civil and Environmental Engineering (443)
- Medicine and Health Sciences (411)
- Civil Engineering (352)
- English Language and Literature (271)
- Psychology (261)
- Engineering Education (230)
- Nanoscience and Nanotechnology (218)
- Business (217)
- Mechanical Engineering (190)
- Keyword
-
- Comparative literature (496)
- comparative literature (488)
- Comparative cultural studies (302)
- comparative cultural studies (297)
- Cultural studies (155)
-
- cultural studies (152)
- Literary theory (136)
- literary theory (135)
- Education (121)
- Information literacy (116)
- Applied sciences (113)
- Problem-based learning (90)
- Media studies (85)
- media studies (84)
- Comparative humanities (81)
- comparative humanities (81)
- Intercultural studies (75)
- Sustainability (75)
- intercultural studies (75)
- Culture and history (73)
- culture and history (73)
- Postcolonial and colonial studies (72)
- postcolonial and colonial studies (72)
- Diasporic, exile, (im)migrant, and ethnic minority writing (71)
- diasporic, exile, (im)migrant, and ethnic minority writing (71)
- Gender studies (68)
- Simulation (68)
- Culture theory (66)
- Feminist studies (66)
- culture theory (66)
- Publication Year
- Publication
-
- Against the Grain (2392)
- CLCWeb: Comparative Literature and Culture (1418)
- International Refrigeration and Air Conditioning Conference (1331)
- The Writing Center Journal (1027)
- International Compressor Engineering Conference (993)
-
- Proceedings of the IATUL Conferences (861)
- The Journal of Purdue Undergraduate Research (650)
- Charleston Library Conference (608)
- Department of Computer Science Technical Reports (474)
- Open Access Dissertations (470)
- CIB Conferences (466)
- Open Access Theses (382)
- Education and Culture (326)
- CTRC Research Publications (295)
- International Conference on Durability of Concrete Structures (285)
- International High Performance Buildings Conference (275)
- Journal of Southeast Asian American Education and Advancement (275)
- Interdisciplinary Journal of Problem-Based Learning (242)
- Purdue Journal of Service-Learning and International Engagement (233)
- Libraries Faculty and Staff Scholarship and Research (229)
- Journal of Aviation Technology and Engineering (212)
- JTRP Technical Reports (200)
- Department of Physics and Astronomy Faculty Publications (199)
- Journal of Pre-College Engineering Education Research (J-PEER) (189)
- Artl@s Bulletin (188)
- Claritas: Journal of Dialogue and Culture (186)
- Birck and NCN Publications (180)
- Department of Electrical and Computer Engineering Technical Reports (166)
- Publications of the Ray W. Herrick Laboratories (138)
- Global Business Languages (137)
- Publication Type
Articles 541 - 570 of 19337
Full-Text Articles in Entire DC Network
Paws And Effect: Canine Companionship And Outcomes In The Chronic Health Condition Hypermobile Ehlers-Danlos Syndrome, Kimberley C. Schenke, Joanna Foster, Danielle Stephens-Lewis
Paws And Effect: Canine Companionship And Outcomes In The Chronic Health Condition Hypermobile Ehlers-Danlos Syndrome, Kimberley C. Schenke, Joanna Foster, Danielle Stephens-Lewis
People and Animals: The International Journal of Research and Practice
Emerging research suggests canine companions may support the management of health conditions, yet evidence within complex, long-term conditions like hypermobile Ehlers-Danlos Syndrome (hEDS) remains limited. hEDS is a multifaceted condition often associated with social withdrawal. Thus, the current research provided a high-powered investigation into whether the nonjudgmental support of canine companions could improve health and well-being outcomes for individuals with hEDS. An online survey of 401 participants was utilized to compare differences in health and well-being among individuals with hEDS who have a canine companion to those who do not. Results revealed that participants with canine companions experienced fewer difficulties …
Concrete Material Bank In Japan Toward Co2 Recycling, Masaki Tamura, Takafumi Noguchi
Concrete Material Bank In Japan Toward Co2 Recycling, Masaki Tamura, Takafumi Noguchi
C3 Symposium 2025
Providing excellent performance as a structural material, concrete has long been essential for modern civilization and recognized as a material that will continue to maintain and support the development of human society. Now that recycling of concrete in a completely closed loop has become technically feasible, concrete is being seen in a new light. On the other hands, the huge issues regarding carbon dioxide emissions all of the world are a concern in the construction field as well as in society. To solve this problem, a concept for new Calcium Carbonate Concrete (CCC) is proposed. This paper is focused on …
Upcycled Medical Hemp Fibers For Enhancing Tensile Strength And Fire Resistance Of High-Strength Concrete, Ahmed Almaadawy, Liahneli Knowles, Abigail Lazier, Srishti Banerji, Zach Haber, Bruce Bugbee
Upcycled Medical Hemp Fibers For Enhancing Tensile Strength And Fire Resistance Of High-Strength Concrete, Ahmed Almaadawy, Liahneli Knowles, Abigail Lazier, Srishti Banerji, Zach Haber, Bruce Bugbee
C3 Symposium 2025
This research investigates fire and tensile resistance of high-strength concretes employing fibers extracted from waste medical hemp stalks. Environmental impact analysis of hemp-based solutions is also considered.
Recovery Of Silica As Scm From Olivine Using Oxalic Acid-Enabled Chemical Comminution, Jie Shi, Hongyan Ma
Recovery Of Silica As Scm From Olivine Using Oxalic Acid-Enabled Chemical Comminution, Jie Shi, Hongyan Ma
C3 Symposium 2025
Using supplementary cementitious materials (SCMs) to substitute cement or clinker, as a decarbonization strategy, is limited by the shortage of conventional SCMs like GGBS, fly ash, and silica fume. Meanwhile, mafic/ultramafic minerals are unlimited to be processed for SCMs production. In this study, oxalic acid is used to dissolve olivine ((Mg, Fe)2SiO4) to produce amorphous silica. Results show that high purity amorphous silica could be successfully obtained and the yield can be up to 93.42%. This process endows the extra value of olivine alongside being used for carbon storage.
Thermochemical Pre-Treatments On Corn Stover Ash To Boost Its Reactivity, P V P Moorthi, Zhihui Sun
Thermochemical Pre-Treatments On Corn Stover Ash To Boost Its Reactivity, P V P Moorthi, Zhihui Sun
C3 Symposium 2025
When treated properly, corn stover ash (CSA) is known to be an effective source of supplementary cementitious materials (SCM) for use in concrete. The influence of thermochemical pre-treatments on the reactivity of CSA was studied in this project. The result shows that acid pre-treatment was effective and necessary in the removal of organic and inorganic compounds from the corn stover. The pre-treatment conditions including type and concentration of acid used, temperature, pre-treatment duration, and the acid/ash (A/A) ratio are important factors that affect the reactivity of the final product. This study shows that a proper pre-treatment condition will lead to …
Hydrophobic Modification For The Design Of High-Performance And Ultra-High Performance Cementitious Composites, Iman Aghayan, Scott Muzenski, Reed T. Heintzkill, Marina I. Kozhukhova, Habib Tabatabai, Konstantin Sobolev
Hydrophobic Modification For The Design Of High-Performance And Ultra-High Performance Cementitious Composites, Iman Aghayan, Scott Muzenski, Reed T. Heintzkill, Marina I. Kozhukhova, Habib Tabatabai, Konstantin Sobolev
C3 Symposium 2025
This paper presents a novel method for designing high-performance and ultra-high-performance concrete (HPC/UHPC) through hydrophobic and nanomaterial modification. Three-dimensional hydrophobization of cementitious matrices is achieved by incorporating water-based emulsions of silico-organic compounds containing active hydrogen. The approach enables high-strength matrices with superior flexural performance via fiber reinforcement, further improved by uniformly distributed small air voids that promote multi-cracking and strain-hardening behavior. Incorporating aluminum oxide (Al₂O₃) nanofibers with 1% silica fume (or metakaolin) produces UHPC-grade strength and ductility while reducing chemical shrinkage and simplifying composition. Developed with Type V and I cements at W/CM < 0.3, the composites reached compressive strengths up to 195 MPa, exhibited high flowability, and showed excellent strain-hardening when reinforced with 2% synthetic macrofibers (PVA and HDPE), with HDPE yielding greater ductility. This synergy of hydrophobic modification, nanoengineered matrix, and synthetic fibers offers a cost-effective, sustainable alternative to conventional HPC/UHPC, exceeding durability and environmental performance benchmarks.
Enhancing Early Strength Development Through Co2-Induced Hydration Acceleration, Patrick Rubaszewski, Thomas Matschei
Enhancing Early Strength Development Through Co2-Induced Hydration Acceleration, Patrick Rubaszewski, Thomas Matschei
C3 Symposium 2025
This study investigates the accelerating effect of gaseous CO2 on cement hydration.The addition of up to 0.2% CO2 by weight of cement during the mixing process led to increased compressive strength after 24 hours and greater heat release during the acceleration phase. However, higher concentrations negatively affected workability and hydration kinetics, resulting in lower compressive strength.
Graphene Reinforced Cement-Based Triboelectric Nanogenerator For Efficient Energy Harvesting, Wenkui Dong, Wengui Li
Graphene Reinforced Cement-Based Triboelectric Nanogenerator For Efficient Energy Harvesting, Wenkui Dong, Wengui Li
C3 Symposium 2025
This study investigated a graphene reinforced cement-based triboelectric nanogenerator (TENG) aimed at harvesting mechanical energies in infrastructure. The triboelectric layers of the cement-based TENG consisted of a fully cured graphene modified cement-based plate and a polytetrafluoroethylene (PTFE) film, which were tested under a contact-separation mode. Microstructural analysis indicated that the graphene was well-dispersed in the cementitious matrix, and the graphene-cement composites achieved excellent compressive and flexural strengths of 53.0 and 3.5 MPa, respectively. The electrical characteristics of the graphene-cement composites, specifically their resistivity and impedance, showed that they did not reach the percolation threshold, making them ideal dielectric materials with …
Computational Simulations Fresh-To-Solid Transition For Additive Manufacturing Of Ultra-High-Performance Fiber Reinforced Concrete, Erol Lale, Bahar Ayhan, Ayesha Ahmed, Elmer Irizarry, Jiaqi Liu, Shady Gomaa, Raul Marrero-Rosa, Gianluca Cusatis
Computational Simulations Fresh-To-Solid Transition For Additive Manufacturing Of Ultra-High-Performance Fiber Reinforced Concrete, Erol Lale, Bahar Ayhan, Ayesha Ahmed, Elmer Irizarry, Jiaqi Liu, Shady Gomaa, Raul Marrero-Rosa, Gianluca Cusatis
C3 Symposium 2025
Additive manufacturing of concrete is a topic of interest within the academia and industry. Simulating the printable concrete behavior from the fresh state to hardened state to long-term will provide the future engineers the ability to optimize the design and predict failure of structural elements. A key aspect for concrete additive manufacturing is the complexity of optimization which includes systems, schedule, and materials. Our research focus on the simulation fresh state, hardened behavior, and the transition from fluid-to-solid of nanoclay modified ERDC ultra-high-performance fiber reinforced concrete system. Discrete fresh concrete model (DFC) and Smooth Particle Hydrodynamics (SPH) model are studied …
Mechanics Of Fracture In Layered Architected Materials, Reza Moini, Aimane Najmeddine, Shashank Gupta
Mechanics Of Fracture In Layered Architected Materials, Reza Moini, Aimane Najmeddine, Shashank Gupta
C3 Symposium 2025
This talk asks the role of mechanics of materials, particularly fracture mechanics in design and engineering civil infrastructure materials. Concrete, a quasi-brittle material is the backbone of the civil infrastructure. Decades of research on engineering and fracture mechanics of concrete led by the hundreds of pioneering works of great scholars, have helped us understand mechanism of crack initiation and propagation in heterogeneous materials. However, there remain a significant need to continue understand mechanics of damage in conventional and novel heterogeneous infrastructure materials. Growth in automation and robotics (e.g., 3D-printing), innovative cementitious composite materials (e.g., architected material), and numerical frameworks (e.g., …
Assessment Of Textured Epoxy-Coated Rebars In Concrete For Chloride Induced Corrosion, Kevin Danner, Shayan Ali Khan, John S. Popovics
Assessment Of Textured Epoxy-Coated Rebars In Concrete For Chloride Induced Corrosion, Kevin Danner, Shayan Ali Khan, John S. Popovics
C3 Symposium 2025
Textured-Epoxy coated rebar (TEC) differs from conventional Epoxy coated rebar (ECR) due to its rougher exterior surface – which aims to reduce cracking in concrete and development length. However, no studies have investigated the long-term corrosion response behavior of both TEC and ECR when subjected to service-level bridge deck displacement criteria. This study utilizes Non-Destructive Testing techniques such as Half-Cell Potential (HCP), Ground Penetrating Radar (GPR), Ultrasonic Pulse Velocity (UPV), and Linear Polarization Resistance (LPR) to characterize the corrosion response behavior of service-level stressed TEC and ECR reinforced concrete samples subjected to a realistic chloride environment.
Comparative Analysis Of The Corrosion Resistance Epoxy-Coated, Textured Epoxy-Coated, And Uncoated Reinforcement Bars, Shayan Ali Khan, Kevin Danner, John S. Popovics
Comparative Analysis Of The Corrosion Resistance Epoxy-Coated, Textured Epoxy-Coated, And Uncoated Reinforcement Bars, Shayan Ali Khan, Kevin Danner, John S. Popovics
C3 Symposium 2025
The corrosion of steel reinforcement inside concrete remains a significant challenge for the construction industry. In the United States alone, an estimated annual cost of $240 billion is incurred from corrosion-related damage, with about 20% attributed to the corrosion of reinforced concrete [1]. Among various corrosion prevention techniques for reinforced concrete, epoxy coating of rebars (EC), has been widely adopted. However, due to the smooth surface of epoxy coating, its bond strength with concrete is reduced significantly, which has become a barrier for its large-scale adoption [2]. To tackle this, Sherwin Williams developed textured epoxy coated rebars (TEC) (figure 1a) …
Cathodic Protection Of Reinforced Concrete Infrastructure Using Mmo-Coated Titanium Alloy Bars, Naveen Krishnan, Christopher Higgins, O. Burkan Isgor
Cathodic Protection Of Reinforced Concrete Infrastructure Using Mmo-Coated Titanium Alloy Bars, Naveen Krishnan, Christopher Higgins, O. Burkan Isgor
C3 Symposium 2025
ASTM B1009 titanium alloy bars (TiABs), which are chemically and mechanically equivalent to Grade 5 titanium, have recently gained attention as dual-purpose materials for near-surface-mounted retrofit (NSMR) of concrete. These bars offer both structural reinforcement and corrosion protection when used as anodes in impressed current cathodic protection (ICCP) systems. While TiABs without mixed metal oxide (MMO) coating provide inherent corrosion resistance as an ICCP anode, their effectiveness in ICCP applications may be limited. This study evaluates the electrochemical behavior of iridium-based MMO coatings on TiABs that are designed as ICCP anodes. Open circuit potential (OCP) measurements showed that both uncoated …
Development Of Ternary Blended Cement Incorporating Limestone And Natural Pozzolan For Enhanced Durability And Sustainability, Azadeh Hosseinpanahi, Luis Baquerizo Ibarra, Hamed Maraghechi
Development Of Ternary Blended Cement Incorporating Limestone And Natural Pozzolan For Enhanced Durability And Sustainability, Azadeh Hosseinpanahi, Luis Baquerizo Ibarra, Hamed Maraghechi
C3 Symposium 2025
This study evaluates the commercial development of ternary blended cement with integration of a zeolite based natural pozzolan as a supplementary cementitious material (SCM). The experimental program involved a systematic characterization of the natural pozzolan, as well as assessment of fresh, mechanical and durability properties of the ternary blended cement to ascertain short-term and long-term performances.
Optimizing Thermoelectric Efficiency In Cementitious Nanocomposites Via Hybrid Swcnt/Ncf Reinforcement, Myrsini E. Maglogianni, Panagiotis A. Danoglidis, Maria S. Konsta-Gdoutos
Optimizing Thermoelectric Efficiency In Cementitious Nanocomposites Via Hybrid Swcnt/Ncf Reinforcement, Myrsini E. Maglogianni, Panagiotis A. Danoglidis, Maria S. Konsta-Gdoutos
C3 Symposium 2025
Cement-based materials with thermoelectric functionalities offer new opportunities for harvesting waste heat from civil infrastructure. While carbon nanomaterials have been shown to enhance the electrical conductivity of cementitious composites, achieving efficient thermoelectric energy conversion requires simultaneously controlling the thermal properties while preserving the electrical properties. In this study, insulating cellulose nanofibrils (NCFs) are combined with superconducting single-walled carbon nanotubes (SWCNTs) to develop nano-engineered cementitious materials capable of converting thermal gradients into electrical energy. Results show that the hybrid SWCNT/NCF mortars exhibited a Seebeck coefficient up to 4083.61 μV/K and ZT of 0.46 while maintaining high electrical conductivity of 126.42 S/m …
Biochar-Amended Engineered Cementitious Composites, Amir Ali Shahmansouri, Zhigang Zhang, Xianming Shi
Biochar-Amended Engineered Cementitious Composites, Amir Ali Shahmansouri, Zhigang Zhang, Xianming Shi
C3 Symposium 2025
This study investigates the incorporation of biochar as a sustainable cement replacement in high-strength ECC, focusing on mechanical properties, durability, microstructural characteristics, and environmental impacts. Biochar was added at 5%, 10%, 20%, and 30% replacement levels by cement weight, and its effects were assessed through compressive and tensile strength tests, TGA, SEM, and LCA. Results showed that biochar-enhanced ECC achieved 28-day compressive strengths of 95.4–99.6 MPa, with a peak tensile strength of 8.58 MPa at 20% biochar content, though higher dosages reduced strain capacity. TGA confirmed increased pozzolanic activity with reduced portlandite content, while SEM images revealed a denser ITZ …
Carbon-Negative Concrete By Using Biochar, Matteo Pavese, Luca Lavagna, Carlo Amata, Jean Marc Tulliani, Mattia Bartoli, Mauro Giorcelli, Claudia Guzzoni Iudice, Alessio Mondello, Matthew Mallory, Chris Carstens, Douglas Dufaux
Carbon-Negative Concrete By Using Biochar, Matteo Pavese, Luca Lavagna, Carlo Amata, Jean Marc Tulliani, Mattia Bartoli, Mauro Giorcelli, Claudia Guzzoni Iudice, Alessio Mondello, Matthew Mallory, Chris Carstens, Douglas Dufaux
C3 Symposium 2025
In this paper we present the realization of carbon negative concrete by substituting cement and aggregate with biochar. By conveniently choosing feedstock and properties of biochar, it is possible to maintain the same compression strength of standard concrete. Several biochar types derived from different vegetal feedstocks were used, that were characterized for their composition and physical properties. The effect of biochar type and grain size distribution was studied, demonstrating the possibility of maintaining or even slightly improving the mechanical properties of mortar and concrete, depending on the biochar content. The physical properties and pore distribution of mortar containing biochar was …
Mix Designs Of Low Modulus Of Elasticity Of Mass Concrete And Cushion Concrete Used In Yusufeli Dam Body, Aydın Saglik
Mix Designs Of Low Modulus Of Elasticity Of Mass Concrete And Cushion Concrete Used In Yusufeli Dam Body, Aydın Saglik
C3 Symposium 2025
The construction of the Yusufeli Dam and Hydroelectric Power Plant on the Coruh River has been completed and the dam, which has a total water storage volume of approximately 2,2 billion cubic meters, has become the highest dam in Turkey and the fifth highest dam in the world with a height of 275 meters in the double-curvature concrete arch dam type. During the design process of the mass concrete body of the Yusufeli Dam, relatively low deformation modulus zones were encountered in some slope rock soils where the thin arch structure would create pressure. It was taken into consideration that …
Using Fluid Absorption Modeling To Determine The Intrinsic Permeability Of Cement-Based Materials, Luiz Antonio De Siqueira Neto, O. Burkan Isgor, W. Jason Weiss
Using Fluid Absorption Modeling To Determine The Intrinsic Permeability Of Cement-Based Materials, Luiz Antonio De Siqueira Neto, O. Burkan Isgor, W. Jason Weiss
C3 Symposium 2025
Neutron radiography (NR) is used during unidirectional fluid absorption experiments to obtain moisture profiles through the height of mortar specimens. The moisture profiles are compared to the results of an established fluid absorption modeling technique, and linear interpolation is used to accurately determine the intrinsic permeability (Kl) of all samples.
Characterization Of Local 2:1 Clays For Utilization In Limestone Calcined Clay Cements, Aiswaria G R, Athira Gopinath
Characterization Of Local 2:1 Clays For Utilization In Limestone Calcined Clay Cements, Aiswaria G R, Athira Gopinath
C3 Symposium 2025
As calcined clays are gaining prominence as supplementary cementitious materials (SCM), demand for kaolinite-based 1:1 clay has surged, especially for Limestone Calcined Clay Cements (LC3). However, the potential of readily available 2:1 clay remains underexplored. Clays vary in composition, microstructure, and reactivity, with most becoming viable SCMs when activated. This study characterizes three local 2:1 clays in India against pure kaolinite to assess their suitability for LC3. Clays were characterized based on geotechnical properties, XRD and thermogravimetric analysis. Based on the TGA analysis, the dehydroxylation temperature for each clay was ascertained and calcined accordingly. The reactivity of the calcined clays …
Leveraging The Use Of Carbonated Water For Sustainable Low-Carbon Cements, Aswathy Rajendran, Sripriya Rengaraju, Abir Al-Tabbaa
Leveraging The Use Of Carbonated Water For Sustainable Low-Carbon Cements, Aswathy Rajendran, Sripriya Rengaraju, Abir Al-Tabbaa
C3 Symposium 2025
The sustainability of the construction industry has been significantly enhanced by the development and use of low-carbon cements. However, achieving net-zero emissions requires more than just reducing embodied carbon of cements; it necessitates the adoption of effective carbon sequestration methods. Although various strategies for incorporating carbon sequestration into construction materials have been explored, the use of carbonated water in low-carbon cement systems remains less-researched. This study investigates the impact of adding carbonated water to two key low-carbon cement types: Slag-based cement (80% cement replacement) and Limestone Calcined Clay Cement (LC3, 50% cement replacement). The findings show that carbonated water improves …
Characterizing Co2 In Cementitious Materials With Qxrd And Tga And Remote Fiber Optic Raman Probe, Mohammad Azimi Pour, Bohong Zhang, Jiaqi Li, Jie Huang, Hongyan Ma
Characterizing Co2 In Cementitious Materials With Qxrd And Tga And Remote Fiber Optic Raman Probe, Mohammad Azimi Pour, Bohong Zhang, Jiaqi Li, Jie Huang, Hongyan Ma
C3 Symposium 2025
The urgent need for producing sustainable cementitious materials has led to increased interest in using carbon-negative technology to enhance sustainability. In this regard, measuring the amount of CO2 is one essential issue. This study evaluated the potentials and the limitation of Thermal Gravimetric Analysis (TGA), Quantitative X-ray Diffraction (QXRD), and Optic Raman Probe in characterizing the CO2 in cementitious material with different dosages. traditional methods like TGA are accurate for measuring CO2 but need destructive or extensive sample preparation. This study proposes using a remote fiber optic Raman spectroscopy probe for non-destructive, in situ CO2 analysis in cementitious materials. Raman …
Advancing Characterization Of Cementitious Systems Via Raman Imaging, Chirayu Kothari, Sudharsan R. Kumar, Yaman Garg, Nishant Garg
Advancing Characterization Of Cementitious Systems Via Raman Imaging, Chirayu Kothari, Sudharsan R. Kumar, Yaman Garg, Nishant Garg
C3 Symposium 2025
The drive for sustainability within the cement industry has resulted in the formulation of complex low-carbon cements that show considerable variation in their mineralogical phases, chemical compositions, and particle sizes. These differences can impact the workability, strength, and durability of concrete. Accurately characterizing these properties is challenging and requires a combination of techniques such as microscopy, spectroscopy, and diffraction. Raman imaging is particularly valuable for investigating the entire lifecycle of cement, covering everything from anhydrous cements to hydration and long-term durability. Here, we present its capability to analyze the phase composition of Ordinary Portland Cement (OPC) and Calcium Sulfoaluminate (CSA) …
Evaluating Fire Resistance Of Calcium Sulfoaluminate Cement-Based Lightweight Mortar: A Comparative Analysis Of Raw And Expanded Vermiculite, Jean Jacques Kouadjo Tchekwagep, Shifeng Huang
Evaluating Fire Resistance Of Calcium Sulfoaluminate Cement-Based Lightweight Mortar: A Comparative Analysis Of Raw And Expanded Vermiculite, Jean Jacques Kouadjo Tchekwagep, Shifeng Huang
C3 Symposium 2025
This study examined the impact of direct fire exposure on the engineering properties of calcium sulfoaluminate cement (CSA) mortars with substitutions of vermiculite, either raw or expanded, at 10%, 20%, and 30% replacement ratios by volume. Specimens measuring 40x40x160 mm were cured for 28 days, dried, exposed to fire, and subsequently cooled. Various tests were conducted before and after exposure to evaluate the fire’s impact on the mortars. Results indicated that increasing the vermiculite content significantly diminished both compressive and flexural strength across all replacement levels, with reductions persisting after fire exposure. Additionally, thermal properties were notably affected; for instance, …
Materials Processing Strategies For Valorizing Industrial Residues In Construction: Mechanical Separation, Co2 Mineralization, And Metal Recovery/Stabilization, Yixi Tian
C3 Symposium 2025
Building a roadmap for integrating processing strategies for waste valorization with potential across multi-categories of industrial residues (metallurgical slags/residues, power-plant ashes, and mine wastes) is an emerging trend. This roadmap [1] seeks to address common industry questions regarding the most suitable valorization approaches for different industrial residues generated in plants based on specific conditions. The effective strategies involve specific technologies such as mechanical separation, CO2 mineralization, and metal recovery/stabilization—all of which extend the value of industrial residues before they can be largely incorporated into construction applications, supporting waste digestion and reducing direct disposal. This talk discusses route competition, research needs, …
In-Situ Stabilization Of Caco3 Polymorphs In Cementitious Systems, Yogiraj Sargam, Vishnu Chaudhari
In-Situ Stabilization Of Caco3 Polymorphs In Cementitious Systems, Yogiraj Sargam, Vishnu Chaudhari
C3 Symposium 2025
The technology of injecting CO2 in a cementitious system (concrete) during mixing has demonstrated scalability and significant potential. This process involves CO2 dissolving in water, releasing carbonate and bicarbonate ions that react with calcium ions from dissolving clinker and hydrate phases, leading to in-situ CaCO3 precipitation. This study examines CaCO3 formation pathways and explores stabilizing favourable polymorphs using additives. Cement paste samples were analyzed using FTIR and X-ray diffraction. Initial results suggest CaCO3 formation follows Ostwald's process. In early hydration (up to 6 hours), amorphous calcium carbonate and metastable crystalline polymorphs (vaterite and aragonite) form. These metastable forms then crystallize …
Carbonated Industrial Waste By Co2 Mineralization As New Constituent For Cements, Maria Chiara Bignozzi, Alessia Artale, Alessandro Allegri, Stefania Albonetti, Alessandro Dal Pozzo, Valentina Scognamiglio, Alberto Renato De Angelis, Roberto Millini
Carbonated Industrial Waste By Co2 Mineralization As New Constituent For Cements, Maria Chiara Bignozzi, Alessia Artale, Alessandro Allegri, Stefania Albonetti, Alessandro Dal Pozzo, Valentina Scognamiglio, Alberto Renato De Angelis, Roberto Millini
C3 Symposium 2025
Carbonation of industrial waste by CO2 mineralization is a carbon capture solution that offers a way to reduce CO₂ emissions and improve waste management. In this study, carbonated waste from the ceramic industry is used in cementitious binders, reducing the carbon footprint of cement production. Mortars prepared with these binders have been tested for strength and physical properties. Preliminary results show that all formulations meet EN 197-1:2011 strength requirements, demonstrating that the carbonated product can reduce clinker content in cementitious binders without compromising their performances.
Wet-Carbonation Of Rcas For Improved Carbonation Efficiency And Mechanical Properties Of Carbonated Rcas And Rca Concrete, Xiang Zhao, Qingli Dai, Jiankai Xie
Wet-Carbonation Of Rcas For Improved Carbonation Efficiency And Mechanical Properties Of Carbonated Rcas And Rca Concrete, Xiang Zhao, Qingli Dai, Jiankai Xie
C3 Symposium 2025
The increasing volume of construction and demolition waste (C&DW) poses significant environmental challenges, making its effective management and treatment crucial. Recycled coarse aggregates (RCA), derived from C&DW, often exhibit weak interfacial transition zones (ITZ), high porosity, and micro-cracks due to residual mortar, limiting their structural performance [1] [2]. This study developed a novel wet carbonation process using glycine acid as an inducer to enhance the mechanical and durability properties of RCA and RCA concrete. Glycine acid, with carboxyl and amino functional groups, formed stable complexes with Ca²⁺ ions, increasing calcium solubility and accelerating carbonation[3]. The process promoted the formation of …
Experimental Study About Various Factors That Influence Quantitative Accuracy Of Co2 Content In Carbonated Cementitious Material, Kazuya Yamashita, Kazuto Tabara, Hiroyuki Kameda, Sho Yoshino
Experimental Study About Various Factors That Influence Quantitative Accuracy Of Co2 Content In Carbonated Cementitious Material, Kazuya Yamashita, Kazuto Tabara, Hiroyuki Kameda, Sho Yoshino
C3 Symposium 2025
We investigated a method to accurately quantify the amount of CO2 fixed in concrete. There are major measurement methods which have different sample decomposition process by acid (AC) and thermal decomposition (TC) method, and the type of CO2 which is able to be quantified is determined by the decomposition methods. Theoretically AC method can quantify only inorganic carbon in cementitious materials. On the other hand, CO2 content by TC method would be affected by organic and elemental carbon containing in the sample, because TC method cannot recognize those. In this study, we designed to compare the CO2 content of cement …
Aqueous Carbonation For Co2 Curing Of Construction Materials, Jae Hong Kim, Seongho Han, Yubin Jun
Aqueous Carbonation For Co2 Curing Of Construction Materials, Jae Hong Kim, Seongho Han, Yubin Jun
C3 Symposium 2025
This paper reviews CO2 curing process for construction materials, focusing on conventional and aqueous carbonation methods. While conventional CO2 curing utilizes gaseous CO2 to accelerate early-age strength development, aqueous carbonation introduces CO2-dissolved water as an advanced alternative. The latter approach, particularly when combined with amine solutions, offers improved application efficiency without requiring specialized curing chambers. The applications of aqueous carbonation extend beyond traditional curing to include surface treatment for enhanced durability, recycled aggregate strengthening, and geopolymer concrete production. These developments represent significant progress toward sustainable concrete production while contributing to carbon utilization in construction industry.