Article
Materials Science, Multidisciplinary
Mingxu Chen, Lei Yang, Yan Zheng, Laibo Li, Shoude Wang, Yongbo Huang, Piqi Zhao, Lingchao Lu, Xin Cheng
Summary: In this study, PP and PVA fibers were introduced into 3D printed CSACCs to improve the stable shape retention and mechanical strength by controlling rheological parameters. The experimental results showed that the fibers enhanced the elastic modulus, yield stress, and thixotropy of CSACCs. The radar map revealed the relationship between rheological parameters and structure deformation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Construction & Building Technology
Manu K. Mohan, A. Rahul, Geert De Schutter, Kim Van Tittelboom
Summary: Calcium sulfoaluminate (CSA) cement is a promising low-CO2 binder system that could potentially replace Portland cement in various applications. This study investigated the feasibility of using CSA cement for 3D printable concrete, and identified rapid hydration and high plastic viscosity as critical challenges. It was found that the use of borax and gluconate as retarders can improve the open time of CSA cement mixtures, but may affect early age compressive strength development.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Marcella S. Barbosa, Marcos A. S. dos Anjos, Kleber C. Cabral, Leonardo S. Dias
Summary: Recently, 3D concrete printing based on additive manufacturing techniques has gained attention in the construction industry. This research aims to reduce cement consumption by developing composites for 3D printing with partial replacement of cementitious materials. The results show the possibility of obtaining printable composites with reduced cement consumption, making it a significant alternative for 3D concrete printing technology.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Manu K. Mohan, A. V. Rahul, Yaxin Tao, Geert De Schutter, Kim Van Tittelboom
Summary: This study focuses on enhancing the structural build-up and strength development of extrusion-based concrete 3D printing using a two-stage mixing method. The results show that the addition of calcium hydroxide leads to rapid hydration progress and improved mechanical properties.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Chemistry, Physical
Joanna Marczyk, Celina Ziejewska, Szymon Gadek, Kinga Korniejenko, Michal Lach, Mateusz Gora, Izabela Kurek, Neslihan Dogan-Saglamtimur, Marek Hebda, Magdalena Szechynska-Hebda
Summary: This study presents the development of hybrid materials based on a geopolymer or ordinary Portland cement matrix for 3D concrete printing methods, with a focus on material properties and printing applications assessment. The research includes analysis of raw materials, evaluation of compressive and flexural strength, as well as the influence of liquid-to-solid ratio on geopolymers. Results show that hybrid materials based on geopolymer matrix with 5% cement addition behave similarly to non-Newtonian fluids, suitable for mold filling and precise detail printing.
Article
Construction & Building Technology
Yue Zhou, Zhongping Wang, Zheyu Zhu, Yuting Chen, Kai Wu, Haoliang Huang, Kasimova Guzal Anvarovna, Linglin Xu
Summary: Calcium sulfoaluminate (CSA) cement-calcined clay blends are promising cementitious materials with lower CO2 footprint. The addition of metakaolin and calcined montmorillonite influences the hydration of CSA cement, affecting setting time, physical strength, drying shrinkage, and microstructure of hydrates. Metakaolin reduces drying shrinkage while calcined montmorillonite accelerates initial heat evolution and setting.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Marcelo Tramontin Souza, Igor Maia Ferreira, Elisangela Guzi de Moraes, Luciano Senff, Sabrina Arcaro, Jose Renato Castro Pessoa, Manuel J. Ribeiro, Antonio Pedro Novaes de Oliveira
Summary: Printable concretes require specific rheological properties that can be improved with chemical additives, but interactions between different additives in co-assembly can affect their effectiveness.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Zhuoyue Xu, Dawang Zhang, Hui Li, Xuemei Sun, Kefei Zhao, Yueying Wang
Summary: Recent advances have improved the controlling of the compressive strength, rheology, and printing properties of cement-based 3D printing material by modifying pastes with inorganic regulators. The addition of fly ash and Granular ground blast furnace slag led to improved extrusion and buildability, with optimized slump, expansion, flexural strength, and compressive strength. These findings have practical implications for the development of 3D printed cement-based materials.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Mohammad Amin Moeini, Masoud Hosseinpoor, Ammar Yahia
Summary: This paper investigates the thixotropic behavior of cement-based materials used in large-scale 3D printing. Rheological measurements and compression tests were conducted to study the influence of different admixtures on the thixotropic behavior and buildability of the materials. The results showed that incorporating attapulgite nanoclay and a modified starch-based VMA enhanced the thixotropic behavior of the printing mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Farzaneh Saadati, Ebrahim Najafi Kani
Summary: The key to successful 3D printing lies in the proper binder and correct formulation, resulting in printable mortar. This study successfully fabricated a 3D printable phosphorus slag-based geopolymer concrete by incorporating mullite and precisely determined liquid-based activator. Experimental results showed that the initial setting time and open time increased with the increase of Si/Na ratio. The presence of mullite improved the compressive strength of the geopolymer matrix. The designed geopolymer paste exhibited thixotropic behavior, making it suitable for 3D printing applications.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Risia A. Araujo, Antonioe Martinelli, Kleber C. Cabral, Andre F. O. A. Dantas, Iago F. D. Silva, Allynson A. C. Xavier, Ana L. Santos
Summary: This work aimed to evaluate the influence of substituting conventional fine aggregate with LECA on the physical and mechanical properties of lightweight cement-based composites for 3D printing. The experimental results showed that replacing sand with LECA improved the thermal insulation performance of the composites without compromising their mechanical strength and porosity. Additionally, a mathematical equation that solely depends on the substitution content was derived to model the thermal behavior of the composites.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Jiabin Xu, Mingxu Chen, Zhihui Zhao, Laibo Li, Shoude Wang, Yongbo Huang, Piqi Zhao, Chenchen Gong, Lingchao Lu, Xin Cheng
Summary: By adding different admixtures to modify 3D printed white Portland cement-based materials (WPCMs), this study found that hydroxypropyl methylcellulose (HPMC) and ethylene-vinyl acetate (EVA) can significantly improve their static yield stress, while calcium formate (CF) dosage of 0-1% can have the opposite effect, and increasing the content of HPMC can establish a good printed structure. Response surface methodology (RSM) was used to investigate the properties of WPCMs with hybrid admixtures, and the optimal dosage of hybrid admixtures was determined to achieve controllable rheology and stable printed structure.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Yaxin Tao, Manu K. Mohan, A. V. Rahul, Geert De Schutter, Kim Van Tittelboom
Summary: Recently, a twin-pipe pumping (TPP) system has been developed for 3D concrete printing. However, the flow division pattern in the static mixer used in the system leads to weak zones in the printed concrete due to the unmixed limestone powder. To overcome this, a TPP system consisting of Portland cement-based mixtures and a borated CSA cement-based mixture is proposed. Results show that this binary binder system improves the mechanical behavior of the printed elements by avoiding the formation of weak zones.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Chemistry, Applied
Martin Philipp Heckl, Miriam Korber, Mario Jekle, Thomas Becker
Summary: For the quality control of starch-based food for 3D food printing, it is important to understand the rheological behavior of the inks during and after printing and their influence on printing accuracy. Mechanical forces during printing strongly affect the pseudoplastic networks of the food inks. By using different hydrocolloids to stabilize the inks, the deformation and relaxation behavior of the materials were investigated, revealing a positive correlation between network strength and printing stability.
FOOD HYDROCOLLOIDS
(2023)
Article
Materials Science, Multidisciplinary
Hongping Zhang, Jianhong Wang, Yaling Liu, Xiaoshuang Zhang, Zhiyi Zhao
Summary: The adaptive processing parameters, including printing speed and line width, are crucial for the printing quality of 3D printed composite cement-based materials. Concrete needs to go through leveling stage and the printing thickness of each layer should be controlled. Intermittent printing with joints results in higher printed quality compared to continuous printing, but may cause stress concentration.
Article
Thermodynamics
Mingxu Chen, Laibo Li, Piqi Zhao, Shoude Wang, Lingchao Lu
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2019)
Article
Materials Science, Ceramics
Zhen Yan, Laibo Li, Mingxu Chen, Lingchao Lu, Piqi Zhao, Xin Cheng
Article
Construction & Building Technology
Mingxu Chen, Laibo Li, Jiaao Wang, Yongbo Huang, Shoude Wang, Piqi Zhao, Lingchao Lu, Xin Cheng
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Engineering, Multidisciplinary
Mingxu Chen, Bo Liu, Laibo Li, Lidong Cao, Yongbo Huang, Shoude Wang, Piqi Zhao, Lingchao Lu, Xin Cheng
COMPOSITES PART B-ENGINEERING
(2020)
Article
Construction & Building Technology
Yongbo Huang, Yan Pei, Jueshi Qian, Xin Gao, Jiao Liang, Guangbin Duan, Piqi Zhao, Lingchao Lu, Xin Cheng
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Construction & Building Technology
Lei Yang, Min Jing, Lingchao Lu, Xiaohong Zhu, Piqi Zhao, Mingxu Chen, Laibo Li, Jingyu Liu
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Mingxu Chen, Lei Yang, Yan Zheng, Laibo Li, Shoude Wang, Yongbo Huang, Piqi Zhao, Lingchao Lu, Xin Cheng
Summary: In this study, PP and PVA fibers were introduced into 3D printed CSACCs to improve the stable shape retention and mechanical strength by controlling rheological parameters. The experimental results showed that the fibers enhanced the elastic modulus, yield stress, and thixotropy of CSACCs. The radar map revealed the relationship between rheological parameters and structure deformation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Construction & Building Technology
Jiabin Xu, Mingxu Chen, Zhihui Zhao, Laibo Li, Shoude Wang, Yongbo Huang, Piqi Zhao, Chenchen Gong, Lingchao Lu, Xin Cheng
Summary: By adding different admixtures to modify 3D printed white Portland cement-based materials (WPCMs), this study found that hydroxypropyl methylcellulose (HPMC) and ethylene-vinyl acetate (EVA) can significantly improve their static yield stress, while calcium formate (CF) dosage of 0-1% can have the opposite effect, and increasing the content of HPMC can establish a good printed structure. Response surface methodology (RSM) was used to investigate the properties of WPCMs with hybrid admixtures, and the optimal dosage of hybrid admixtures was determined to achieve controllable rheology and stable printed structure.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Zhihui Zhao, Mingxu Chen, Jiabin Xu, Laibo Li, Yongbo Huang, Lei Yang, Piqi Zhao, Lingchao Lu
Summary: The study investigated the effects of mix design on the performance of magnesium potassium phosphate cement composites (MPCCs) for 3D printing, focusing on initial setting time and rheological properties. By optimizing the mix design, the initial setting time was prolonged and the compressive strength was improved.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jun Xu, Lingchao Lu, Guangbin Duan, Weilin Zhao
Summary: Three eco-friendly reduced graphene oxides (rGOs) were obtained using beer, wine and cocoa as reducing agents. The properties of the rGO nanofluids were found to be influenced by the type of base fluids and nanoparticles. Among the rGO nanofluids, those prepared using wine showed excellent stability and thermal conductivity.
Article
Construction & Building Technology
Lu Liu, Piqi Zhao, Chen Liang, Shoude Wang, Yongbo Huang, Na Cui, Lingchao Lu
Summary: This study investigated the effect of hydrophobic flake as a functional filler on the polymer-modified cement-based coating. The results showed that the hydrophobic flake improved the protection performance and durability of the coating.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Lei Yang, Mingxu Chen, Zeyu Lu, Yongbo Huang, Jiaao Wang, Lingchao Lu, Xin Cheng
CEMENT & CONCRETE COMPOSITES
(2020)
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)