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Enhancing The Post-Crack Tensile Strain Capacity Of Metakaolin- Portland Limestone Cement Blend By Using Carbon Nanotubes, Rohitashva K. Singh, Panagiotis A. Danoglidis, Maria S. Konsta-Gdoutos Sep 2025

Enhancing The Post-Crack Tensile Strain Capacity Of Metakaolin- Portland Limestone Cement Blend By Using Carbon Nanotubes, Rohitashva K. Singh, Panagiotis A. Danoglidis, Maria S. Konsta-Gdoutos

C3 Symposium 2025

Incorporating metakaolin (MK) into cementitious materials is known to enhance strength and stiffness, however, this yields a relatively brittle material with a significant loss of the ultimate strain capacity. To compensate for the loss in ductility, well-dispersed carbon nanotubes (CNTs) are incorporated in MK-Portland Limestone Cement (PLC) mortar to reinforce the Interfacial Transition Zone (ITZ) which is crucial for controlling the crack formation and propagation. Nanoscale imaging and mechanical property mapping at the ITZ between the nanomodified MK-PLC matrix and aggregates revealed that the local nanostructure and morphology of the ITZ were modified, resulting in an increase in the modulus …

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Biochar-Amended Engineered Cementitious Composites, Amir Ali Shahmansouri, Zhigang Zhang, Xianming Shi Sep 2025

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 …

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An Interpretable Machine Learning Technique To Predict Size Effect And Fracture Behavior Of Concrete, Md Nasir Uddin, Md Khaliqul Bari, Amlan Majumder, Picasso Kumar Debnath, Xijun Shi Sep 2025

An Interpretable Machine Learning Technique To Predict Size Effect And Fracture Behavior Of Concrete, Md Nasir Uddin, Md Khaliqul Bari, Amlan Majumder, Picasso Kumar Debnath, Xijun Shi

C3 Symposium 2025

The size effect phenomenon, stemming from the inherent fracture characteristics of materials, is notably widespread in concrete. Traditional approaches to investigate this effect and concrete fracture behaviors are typically laborious. To address these issues, this study employs a machine learning (ML) methodology (e.g., light gradient boosting machine (LGBoost) and categorical boosting (CatBoost)). The findings indicate that these models deliver high accuracy in predicting the nominal flexural strength of concrete, reaching R² values of 0.933 and 0.929, respectively, for testing the models. Additionally, SHapley additive exPlanations (SHAP) analysis was used to differentiate the influence of material and geometric parameters on the …

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Rebel Sensor For Real-Time Concrete Strength: Eliminating Calibration And Reducing Carbon Footprint, Rui He, Zhihao Kong, Joe Turek, Na (Luna) Lu Sep 2025

Rebel Sensor For Real-Time Concrete Strength: Eliminating Calibration And Reducing Carbon Footprint, Rui He, Zhihao Kong, Joe Turek, Na (Luna) Lu

C3 Symposium 2025

Concrete strength is a key factor influencing construction quality, cost, schedule, and durability. However, current testing methods—such as cylinder and beam breaks—are time-consuming, costly, and carbon-intensive, often delaying construction and generating unnecessary waste. Existing maturity methods (e.g., ASTM C1074) also require pre-established, mix-specific curves that take weeks and thousands of dollars to develop.To address these challenges, we developed the REBEL Sensor—an IoT-enabled technology that enables direct, real-time, and wireless monitoring of in-place concrete strength without the need for pre-determined calibration curves. By accurately predicting final strength at 28 or 56 days from the initial mix, our sensor empowers engineers to …

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Calcium Sulfoaluminate-Belite Cement Production Using Industrial Wastes, Bipina Thaivalappil, Piyush Chaunsali Sep 2025

Calcium Sulfoaluminate-Belite Cement Production Using Industrial Wastes, Bipina Thaivalappil, Piyush Chaunsali

C3 Symposium 2025

This study explores the development of calcium sulfoaluminate-belite (CSAB) cement using alternative raw materials such as low-CaO limestone and red mud, aiming to reduce cost and environmental impact. CSAB clinkers were synthesized, and the mineralogy and mechanical performance were assessed. The findings demonstrate that CSAB cement with comparable phase composition and mechanical performance to commercial variants can be achieved, supporting the feasibility of sustainable raw material utilization.

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Mix Designs Of Low Modulus Of Elasticity Of Mass Concrete And Cushion Concrete Used In Yusufeli Dam Body, Aydın Saglik Sep 2025

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 …

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Co₂ Seeding Admixtures For Enhanced Concrete Activation, Shipeng Zhang, Guangqi Xiong, Shuangshuang Liu Sep 2025

Co₂ Seeding Admixtures For Enhanced Concrete Activation, Shipeng Zhang, Guangqi Xiong, Shuangshuang Liu

C3 Symposium 2025

In this study, on-site CO2 seeding admixtures were prepared using power ultrasound-assisted pre-carbonation and chelator-assisted pre-carbonation (GLTA, EDTA) to enhance the carbonation efficiency and mechanical properties. Studies have shown that the application of power ultrasound can achieve a maximum CO2 uptake of 9.0% of the binder during the preacarbontion process. Compared with those of the traditional mixing batch and ordinary carbonation seeding activated batch, the strength of the power ultrasound seeding activated batch increased by 27.2 % and 21.4 %, respectively, after 1 day. Additionally, the EDTA-assisted pre-carbonation can achieve a maximum CO2 uptake of 9.6% of the binder during …

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Cold-Compacted Concrete Waste Composites – Sustainable Low-Carbon Materials: Effect Of Original Concrete Quality, Ngoc Kien Bui, Takafumi Noguchi, Ippei Maruyama Sep 2025

Cold-Compacted Concrete Waste Composites – Sustainable Low-Carbon Materials: Effect Of Original Concrete Quality, Ngoc Kien Bui, Takafumi Noguchi, Ippei Maruyama

C3 Symposium 2025

A compacted concrete waste composite material (CWC) is developed using a cold compaction approach with recycled concrete waste particles, without the use of cement. This study aims to investigate the effects of carbonation and the original quality of the concrete waste (CW) particles on the properties of composite material, with the goal of proposing a pretreatment of concrete waste particles which proposed for CO2 sequestered for producing CWC with attained strength. This study found that the original quality of the CW strongly affects the properties of the CWC.

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Practical Implementation Of Internally Cured Concrete Using Superabsorbent Polymers, Chibueze Ajuonuma, Raikhan Tokpatayeva, Jan Olek, Kendra A. Erk Sep 2025

Practical Implementation Of Internally Cured Concrete Using Superabsorbent Polymers, Chibueze Ajuonuma, Raikhan Tokpatayeva, Jan Olek, Kendra A. Erk

C3 Symposium 2025

This study investigates the practical implementation of internally cured plain and slag cement concrete using superabsorbent polymers (SAPs) through a comprehensive field trial. The objective was to develop strategies to successfully deliver and disperse SAP in concrete, evaluate the internal curing performance of SAP in concrete mixtures containing Type IL cement, slag-cement and colloidal nanosilica and evaluate fresh properties, strength development and durability performance of SAP-modified concrete mixes in real-world applications. The incorporation of SAPs aims to enhance internal curing, reduce shrinkage, and improve the long-term performance of concrete structures. Six concrete mixtures were evaluated with Type IL cement, 30% …

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Leveraging The Use Of Carbonated Water For Sustainable Low-Carbon Cements, Aswathy Rajendran, Sripriya Rengaraju, Abir Al-Tabbaa Sep 2025

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 …

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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 Sep 2025

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 …

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Computer Vision-Driven Sorptivity Tests For Cementitious Materials, Hossein Kabir, Sunav Dahal, Nishant Garg Sep 2025

Computer Vision-Driven Sorptivity Tests For Cementitious Materials, Hossein Kabir, Sunav Dahal, Nishant Garg

C3 Symposium 2025

Assessing water absorption, or 'sorptivity,' in cement-based materials is a crucial method for evaluating durability. The ASTM C1585 standard provides a straightforward approach for measuring sorptivity, yet it is often labor-intensive and time-consuming. This study presents two innovative strategies to accelerate and automate sorptivity measurements through computer vision. The first method involves a droplet test, demonstrating that the initial dynamics of a water droplet's contact angle, characterized by CNNs, strongly predict the initial sorptivity of paste samples. By analyzing data from 63 different paste systems, this method estimates the 6-hour initial sorptivity in mere seconds. The second method utilizes a …

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Computational Assessment Of Earthquake Resistance Of Natural Pozzolan-Based Engineered Cementitious Composite Structures, Junyi Duan, Diego Aparicio, Alvaro Paul, Chengcheng Tao, Qingxu Jin Sep 2025

Computational Assessment Of Earthquake Resistance Of Natural Pozzolan-Based Engineered Cementitious Composite Structures, Junyi Duan, Diego Aparicio, Alvaro Paul, Chengcheng Tao, Qingxu Jin

C3 Symposium 2025

The increasing frequency and intensity of earthquakes worldwide pose significant challenges to the structural integrity and safety of infrastructure systems. Engineered cementitious composites (ECC), known for their superior tensile ductility, strength and cracking control, provide a promising solution for enhancing earthquake resistance of structures. This study presents a computational assessment of natural pozzolan (NP)-reinforced ECC structures subjected to seismic impact through finite element analysis. The analysis investigates the dynamic performance of NP-ECC structures in terms of stress distribution and structural deformation. A three-story NP-ECC frame structure under a 6.5 magnitude earthquake on Richter scale is studied and compared with a …

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Properties Of Calcined Clay-Limestone Cement Concrete, Dayou Luo, Maria Juenger, Kimberly Kurtis, Kyle Riding, Peter Taylor, Kejin Wang Sep 2025

Properties Of Calcined Clay-Limestone Cement Concrete, Dayou Luo, Maria Juenger, Kimberly Kurtis, Kyle Riding, Peter Taylor, Kejin Wang

C3 Symposium 2025

Incorporating calcined clay (C) and limestone powder (L) into concrete effectively reduces carbon emissions. However, its application is mainly limited by commercial material variability, availability, and specifications. This study presents the properties of concrete made with Type IL cement, 30% C, and/or 15% L from commercially available sources across various U.S. regions. Results indicate that C extended setting time and reduced early-age strength and surface resistivity (SR) but enhanced both at later ages, while further addition of L lowered strength due to dilution effect, as expected. Overall, concrete properties are sufficient for implementation in construction.

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Evaluating Fire Resistance Of Calcium Sulfoaluminate Cement-Based Lightweight Mortar: A Comparative Analysis Of Raw And Expanded Vermiculite, Jean Jacques Kouadjo Tchekwagep, Shifeng Huang Sep 2025

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, …

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Perovskite Materials For Photocatalytic Reduction Of Co2, Meraly D. Lopez Morales, Anna Benko, Petr Zilberman, Edith Luevano Hipolito, Konstantin Sobolev Sep 2025

Perovskite Materials For Photocatalytic Reduction Of Co2, Meraly D. Lopez Morales, Anna Benko, Petr Zilberman, Edith Luevano Hipolito, Konstantin Sobolev

C3 Symposium 2025

Perovskite photocatalysts have emerged as promising candidates for carbon dioxide (CO2) reduction due to their outstanding light absorption properties, efficient charge separation, and tunable band structures. Reported research explored the pathways for optimization of the perovskite structures, surface modifications, and doping strategies to enhance the efficiency of CO2 conversion. This research was focused on translating laboratory synthesis into practical applications such as the use of perovskites as coatings on construction materials, improving the materials' resistance to environmental conditions and degradation over time and contribute to effective conversion of carbon dioxide into products with potential use. Further optimization of perovskite coatings …

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Materials Processing Strategies For Valorizing Industrial Residues In Construction: Mechanical Separation, Co2 Mineralization, And Metal Recovery/Stabilization, Yixi Tian Sep 2025

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, …

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Carbon Sequestration Technology In Cement-Based Materials: A Review Of Mechanisms And Applications, Yingfang Fan, Lei Wang, Xiangming Zhou Sep 2025

Carbon Sequestration Technology In Cement-Based Materials: A Review Of Mechanisms And Applications, Yingfang Fan, Lei Wang, Xiangming Zhou

C3 Symposium 2025

Carbon sequestration technology is crucial for achieving the Net Zero climate target. Regarding carbon sequestration via concrete technology, it mainly involves two approaches: reacting natural ores or industrial waste with CO2 to incorporate them into concrete and ensuring stable CO2 storage throughout the concrete lifecycle. The basic mechanism relies on the formation of calcium carbonate through reactions between CO2 and calcium/magnesium components in concrete. This technology spans from raw material carbon capture to the entire production process, enhancing concrete performance by filling pores, improving interfacial bonding, and promoting CO2 mineralization. Factors influencing sequestration efficiency include material composition, particle size, reaction …

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Performance Of Carbonated Low-Lime Calcium Silicate Composites Upon Exposure To Sea Water, Raikhan Tokpatayeva, Jan Olek Sep 2025

Performance Of Carbonated Low-Lime Calcium Silicate Composites Upon Exposure To Sea Water, Raikhan Tokpatayeva, Jan Olek

C3 Symposium 2025

This presentation compares the seawater resistance of carbonated mortar specimens made with a nonhydraulic calcium silicate cement and those made with Type I portland cement (OPC). Seawater resistance tests were conducted following procedures adapted from ASTM C1012, with all specimens exposed to artificial seawater prepared according to ASTM D1141-98 under three conditions: (a) room temperature (RT), (b) 60°C, and (c) deionized water (DI) as a reference. The study involved measuring length changes, visually assessing changes in specimen’s appearance, conducting microstructural characterization using scanning electron microscopy (SEM), performing thermogravimetric analysis (TGA), and analyzing the chemical composition of the soak solution using …

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Synergistic Effects Of Co2 Curing And Recovered Carbon Black Nano Additives On Early Age Performance Of Cementitious Composites, Aniya Edwards, Raikhan Tokpatayeva, Jan Olek, Mirian Velay-Lizancos Sep 2025

Synergistic Effects Of Co2 Curing And Recovered Carbon Black Nano Additives On Early Age Performance Of Cementitious Composites, Aniya Edwards, Raikhan Tokpatayeva, Jan Olek, Mirian Velay-Lizancos

C3 Symposium 2025

Both CO2 curing, a potential precast plant treatment, and nano-additives can enhance the strength and reduce the porosity of cementitious composites. However, their simultaneous application may lead to interactions that influence curing effectiveness, particularly as nanoparticles may alter the effectiveness of CO2 curing. This study investigates the combined effects of CO₂ curing and nanomodification on the early-age strengths of precast cementitious composites, given its importance for precast industry productivity. Mortar and paste batches incorporating recovered carbon black (rCB), a nanomaterial derived from recycled waste rubber, were prepared with 0% and 2% rCB by cement weight. Specimens form each mixture were …

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Serpentine Activation And Co2 Mineralization: A Pathway To Sustainable Cementitious Materials, Shayan Gholami, Luis Baquerizo Ibarra, Hamed Maraghechi Sep 2025

Serpentine Activation And Co2 Mineralization: A Pathway To Sustainable Cementitious Materials, Shayan Gholami, Luis Baquerizo Ibarra, Hamed Maraghechi

C3 Symposium 2025

Serpentine, a naturally occurring magnesium-rich mineral, has a significant capacity to bind carbon dioxide (CO₂). This study explores the activation and CO₂ mineralization with serpentine, investigating its potential as a supplementary cementitious material (SCM). The findings of this research could play a crucial role in assisting the cement industry in reducing its carbon footprint while promoting greater sustainability.

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Converting Olivine Into A Novel Mg-Based Cement For Carbon Sequestration, Jihui Qin, Xing Cheng, Hongyan Ma Sep 2025

Converting Olivine Into A Novel Mg-Based Cement For Carbon Sequestration, Jihui Qin, Xing Cheng, Hongyan Ma

C3 Symposium 2025

Natural Mg-rich olivine could potentially serve as a scalable feedstock for Mg-based cements with zero CO2 emissions. This study explores an innovative synthesis of a Mg-based cement by directly reacting olivine with oxalic acid (H2C2O4). The hydration behaviors and cementitious properties of olivine–oxalic acid blends are investigated, as a function of olivine-to-oxalic acid (OL/OA) weight ratio. Higher OL/OA ratio results in faster hydration, while the best compressive strength with up to 32 MPa is obtained at a moderate OL/OA ratio of 3.5 after 28 days. The obtained cements are composed of residual olivine minerals and a dense and compact glushinskite …

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Mechano-Carbonation Of Mineral And Construction Waste Streams: Manufacturing High-Performance Cement Replacements Through Advanced Co2 Capture And Utilization, Matthew Hollingham, Jon Smith, Juan Pablo Gevaudan Sep 2025

Mechano-Carbonation Of Mineral And Construction Waste Streams: Manufacturing High-Performance Cement Replacements Through Advanced Co2 Capture And Utilization, Matthew Hollingham, Jon Smith, Juan Pablo Gevaudan

C3 Symposium 2025

SCM production is far from reaching the levels demanded by industry, with the US relying heavily on fly ash and slag imports to meet this requirement. To address this challenge, we have developed a novel method, referred here to as mechano-carbonation, that utilizes CO₂ during simultaneous milling to manufacture supplementary cementitious materials (SCMs) from abundant volcanic rocks, namely basalt, as well as concrete waste. For basalt, this innovative process accelerates the natural formation of carbonic acid during processing, enabling the creation of pozzolanic silica gels that enhance the reactivity of basalt by 4.5-fold. This presentation will also demonstrate that the …

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A Mathematical Model For Co2 Capture Via Mineral Carbonation Using Hydrated Lime, Natalia Vidal De La Peña, Grégoire Léonard, Dominique Toye Sep 2025

A Mathematical Model For Co2 Capture Via Mineral Carbonation Using Hydrated Lime, Natalia Vidal De La Peña, Grégoire Léonard, Dominique Toye

C3 Symposium 2025

The construction sector contributes to approximately 37% of global GHG emissions. To mitigate this impact, this study develops a mathematical model to analyze CO2 capture via hydrated lime carbonation. The model integrates reaction kinetics, diffusion and heat balance, considering the effects of liquid water saturation, the influence of porosity on diffusion and the heat generated by both the reaction and water evaporation. For a specific case, the carbonation front and temperature gradient along the reactor are analyzed. Then, the model is validated, demonstrating promising results for optimizing future carbonation processes.

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Proportioning And Curing Optimization Of Carbonated Calcium Silicate-Based Materials Via Machine Learning And Genetic Algorithm, Kangyi Cai, Hongyan Ma Sep 2025

Proportioning And Curing Optimization Of Carbonated Calcium Silicate-Based Materials Via Machine Learning And Genetic Algorithm, Kangyi Cai, Hongyan Ma

C3 Symposium 2025

Calcium silicate can react with CO2 in the presence of water to gain strength and thus can be both taken as an alternative binder and a carbon sink. A series of calcium silicates exists in industrial products and natural rocks with diverse material properties, implying its promising sustainable potential and yet foreseeable obstacles in quality control. To tackle that, a data-driven prediction-optimization computational framework was proposed based on a high-fidelity dataset of carbonated calcium silicate-based materials. Ensemble machine learning models were built based on the curated data for CO2 uptake and strength predictions. Pareto front searching was further conducted using …

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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 Sep 2025

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.

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Wet-Carbonation Of Rcas For Improved Carbonation Efficiency And Mechanical Properties Of Carbonated Rcas And Rca Concrete, Xiang Zhao, Qingli Dai, Jiankai Xie Sep 2025

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 …

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Aqueous Carbonation Of Recycled Concrete Fine Dust: Efficiency And Feasibility Analyses, Yuyan Huang, Hongyan Ma Sep 2025

Aqueous Carbonation Of Recycled Concrete Fine Dust: Efficiency And Feasibility Analyses, Yuyan Huang, Hongyan Ma

C3 Symposium 2025

This study investigates the potential of recycled concrete fine dust (RCD) as a sustainable supplementary cementitious material (SCM) and evaluates its carbonation efficiency through aqueous carbonation. By utilizing RCD, a waste byproduct of concrete demolition, the research aims to enhance the circularity of construction materials while reducing the carbon footprint of cementitious systems. The carbonation process was assessed using X-ray diffraction (XRD) and thermogravimetric analysis (TGA) to identify phase assemblage evolutions and carbonation products. Results reveal that aqueous carbonation significantly enhances the formation of calcium carbonate phases. XRD confirmed the presence of carbonate phases, while TGA provided insights into the …

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Change In Property Of Hardened Cement Specimens Having Different Mineral Composition Cured In High Concentration Co2 From The Very Early Material Age, Kazuto Tabara, Kazuya Yamashita, Hiroyuki Kameda, Shintaro Miyamoto Sep 2025

Change In Property Of Hardened Cement Specimens Having Different Mineral Composition Cured In High Concentration Co2 From The Very Early Material Age, Kazuto Tabara, Kazuya Yamashita, Hiroyuki Kameda, Shintaro Miyamoto

C3 Symposium 2025

We conducted research of CO2 capture behavior and rate of CO2 diffusion into hardened cement specimens of different pre-curing period before starting accelerating carbonation curing for ordinary portland cement (herein after OPC), OPC mixed with ground granulated blast furnace slag (herein after BB), and OPC mixed with an amorphous calcium aluminate-based accelerator (hereinafter ACC) respectively. We prepared two-type of hardened cement specimens, the first was in the case of powder shape hardened cement paste specimen which is designed to avoid carbon dioxide diffusion’s influence as much as possible and to evaluate fixation capacity of CO2, as a result CO2 content …

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Aqueous Carbonation For Co2 Curing Of Construction Materials, Jae Hong Kim, Seongho Han, Yubin Jun Sep 2025

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.

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