Article
Construction & Building Technology
Ariel Berrio, Jorge Tobon, A. G. De la Torre
Summary: The synthesis kinetics of calcium sulfoaluminate polymorphs, OY and CY, were studied. The activation energy and frequency factor of both polymorphs were determined. The coexistence of both polymorphs was found to be crucial in the kinetic study.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Thermodynamics
Melinda Majerova, Anna Prnova, Jozef Kraxner, Beata Pecusova, Alfonz Plsko, Dusan Galusek
Summary: In this study, Bi doped gehlenite glasses were prepared using conventional melting method. The addition of Bi led to a decrease in the crystallization temperature of gehlenite crystals. The thermal properties and crystallization kinetics of the glasses were studied using differential thermal analysis and X-ray diffraction.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Crystallography
Ying Xu, Pan Song, Weigang Cao, Hui Li, Jinglong Liang
Summary: Steel slag, a challenging industrial solid waste to recycle due to its complex components and poor mechanical properties, was successfully modified by adding Al2O3-SiO2 through high temperature sintering, leading to improved compressive strength. The research revealed that the main phase changed to gehlenite at higher temperatures, providing a theoretical basis for enhancing the mechanical properties of modified steel slag.
Article
Construction & Building Technology
Zhen Wang, Jinzhen Li, Shaowen Huang, Feilong Wu, Jie Zhu
Summary: Increasing the Al2O3/SiO2 ratio was found to improve the whiteness of white sulfoaluminate cement (W center dot SAC) and alleviate resource scarcity. By increasing this ratio, iron elements can be better dispersed, leading to increased brightness and greenness, reduced yellowness, and improved whiteness of the clinker. Additionally, increasing the ratio also enhances the hydraulic activity and heat generation of W center dot SAC.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Yan Shen, Xi Chen, Jiang Li, Peifang Wang, Jueshi Qian
Summary: This paper reports the laboratory production of TCSA cement by adding minor elements, investigating the influence of dopants on the mineralogical composition, clinkering conditions, mechanical properties, and hydration products. The results showed that Na2O is the most effective dopant and has a significant impact on the strength development of TCSA cement.
Article
Construction & Building Technology
Natechanok Chitvoranund, Barbara Lothenbach, Diana Londono-Zuluaga, Frank Winnefeld, Karen Scrivener
Summary: This study investigates the effect of temperature on the phase assemblages of belite-ye'elimite cement through thermodynamic modelling and experimental data comparison. The research findings indicate that the degree of belite reaction plays a crucial role in the phase assemblages, and the reaction at high temperature contributes to additional strength. However, the specific effect of temperature remains unclear.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Materials Science, Ceramics
Wenke Zhang, Shengqiang Song, Mithun Nath, Zhengliang Xue, Guojun Ma, Yawei Li
Summary: The Al2O3-CaO-Cr2O3 system doped with SiO2 under heat treatment in an air atmosphere successfully inhibited the generation of toxic Cr6+ and transformed it into stable Cr3+, thus reducing harm. The investigation showed that the addition of SiO2 led to the disappearance of Cr6+ compound Ca4Al6Cr6+O16 and the formation of Cr3+ in a more stable phase, effectively preventing Cr6+ at elevated temperatures.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Jiaoling Zheng, Shuaifei Wei, Qianqian Wang, Xiaodong Li, Suhua Ma
Summary: The synthesis of Alite-ye'elimite cement (ACSA) through the single firing process at lower temperature with the addition of phosphorous slag and copper slag has the potential to become a low-energy Portland cement. The coexistence of alite and ye'elimite can improve cement quality, and controlling the activation energy during their formation and decomposition processes is crucial for their better coexistence in cement production. Results showed that the diffusion model can determine their apparent activation energy, with temperature-dependent activation energy for alite and ye'elimite formation and decomposition.
Article
Construction & Building Technology
Fatima-Zahra Abir, Youssef El Hafiane, Agnes Smith, Yoshinobu Kondo, Yusuke Sakai, Toru Asaka, Koichiro Fukuda, Mohamed Mesnaoui, Younes Abouliatim, Lhabib Nibou
Summary: Pure powders of ye'elimite Ca4Al6-2xFe2xSO16 particles containing iron were synthesized by chemical route for the first time. The increase in iron content in the reaction system leads to an increase in the amount of iron-stabilized cubic phase and a decrease in the orthorhombic phase until a concentration of x = 1.13 where only the cubic phase is detected. The presence of iron also causes the formation of ferritic phases, and a chemical treatment with sodium dithionite was proposed to eliminate them.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Construction & Building Technology
Marco Simoni, Theodore Hanein, Tristana Y. Duvallet, Robert B. Jewell, John L. Provis, Hajime Kinoshita
Summary: This study investigates the formation of cement clinker assemblages at different temperatures, exploring the compatibility of various compounds during the process and the interactions between different clinker components.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Construction & Building Technology
Diandian Zhao, Jonah M. Williams, Ah-Hyung Alissa Park, Shiho Kawashima
Summary: In this research, all three forms of calcium carbonate (calcite, aragonite, and vaterite) were synthesized and their effects on cement rheology were studied. It was found that aragonite increased the yield stress and storage modulus of cement pastes, while calcite and vaterite did not. The mechanisms underlying these changes were discussed, including geometric features, hydration kinetics, and surface charge.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Construction & Building Technology
Diandian Zhao, Jonah M. Williams, Zhanzhao Li, Ah-Hyung Alissa Park, Aleksandra Radli, Pengkun Hou, Shiho Kawashima
Summary: Three anhydrous calcium carbonate polymorphs (calcite, aragonite, and vaterite) were synthesized and characterized in this study. The effects of these polymorphs on cement pastes, including compressive strength, hydration kinetics, and phase compositions, were investigated. The results showed that aragonite and vaterite remained stable in the cement systems even after a prolonged age, which had implications for their use in cement systems depending on the intended applications.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Construction & Building Technology
Solmoi Park, Yeonung Jeong, Juhyuk Moon, Namkon Lee
Summary: When blended with CSA/OPC paste, the addition of C (S) over bar can delay the hydration of C3S, negatively affecting the strength development of the blended paste; with increasing C (S) over bar content, the induction period is prolonged, leading to an increase in initial setting time; the addition of C (S) over bar results in delayed hydration of C(4)A(3)(S) over bar and more ettringite formation after a few hours of hydration.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Ai Zhang, Yong Ge, Sen Du, Guangzhi Wang, Xin Chen, Xu Liu, Hebin Li
Summary: This paper investigated the durability performance of cement paste and cement mortar containing nano-SiO2 and nano-Al2O3 attacked by Na2SO4 solution under different air pressures. The results showed that lower air pressure exacerbated salt efflorescence, but the incorporation of nanomaterials reduced the damage caused by Na2SO4. The flexural/compressive strength of nano-modified mortar improved due to the presence of NS and NA. Additionally, the addition of nanomaterials reduced porosity and the generation of corrosion products.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
A. Barneoud-Chapelier, G. Le Saout, N. Azema, Y. El Bitouri
Summary: This study investigates the effect of polycarboxylate superplasticizer (SP) on BYF cement paste. It is found that a low dosage of SP is necessary to avoid destabilization and improve resistance to bleeding and segregation. The affinity of polycarboxylate-based superplasticizer with cement surface enhances cement particle dispersion and reduces yield stress during the low activity period. Furthermore, SP delays early age hydration, resulting in a decrease in compressive strength at early age but an increase after 90 days.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Ary Alain Hoyos-Montilla, Francisca Puertas, Jorge Ivan Tobon
Summary: The study evaluated the roles of sodium hydroxide, calcium hydroxide, and temperature on the reaction stages and heat flow evolution of alkali-activated coal fly ash. The factors were found to significantly influence the dissolution of ash rich in aluminium units, diffusion-nucleation processes, formation of reaction products, and the efficiency of alkali activation at high temperatures.
ADVANCES IN CEMENT RESEARCH
(2021)
Article
Engineering, Multidisciplinary
Jorge I. Tobon, Juan D. Cohen, Ludovic Dorkis
REVISTA FACULTAD DE INGENIERIA-UNIVERSIDAD DE ANTIOQUIA
(2020)
Article
Materials Science, Multidisciplinary
I Bolanos-Vasquez, R. Trauchessec, J. Tobon, A. Lecomte
MATERIALS TODAY COMMUNICATIONS
(2020)
Article
Engineering, Environmental
J. Pedraza, A. Zimmermann, J. Tobon, R. Schomaecker, N. Rojas
Summary: The study discusses the option of reducing CO2 emissions in the cement industry by utilizing CO2-containing flue gas and cement kiln dust to produce mineral carbonates. Implementing the MCCKD process results in an increase in cost of goods and a decrease in CO2 emissions, especially in scenarios with full abatement. From an economic feasibility and environmental advantage perspective, the MCCKD process combined with renewable energy for transport and storage shows significant benefits compared to the same process based on fossil energy sources.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Construction & Building Technology
Jose Rodriguez, Moises Frias, Jorge Tobon
Summary: The study evaluated coal washing waste as a potential new raw material for ecocements, finding that high-quality eco-pozzolans can be obtained through a thermal activation process. Good correlation was found between the compressive strength of blended cements and the amorphous content of thermally activated waste.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Environmental Sciences
Natalia Marin-Alzate, Jorge Tobon, Bruno Bertolotti, Maria Esther Quintana Caceda, Elena Flores
Summary: This study found that Peruvian diatomites have potential for removing heavy metals from contaminated effluents, with removal efficiency exceeding 98% for Zn. Different properties of diatomites do not directly determine the efficiency of removing different metals, and multiple parameters must be considered simultaneously.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Materials Science, Multidisciplinary
Natalia Betancur-Granados, Jarol E. Molina, Herbert Pollmann, Jorge Tobon, Oscar Jaime Restrepo-Baena
Summary: By utilizing different metallic precursors, the alternative process can produce cementitious materials with faster hydration rates. Compared to traditional cementitious materials, these new materials can complete the hydration process within 24 hours, demonstrating good hydraulic behavior.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Construction & Building Technology
B. A. Feijoo, J. Tobon, O. J. Restrepo-Baena
Summary: The study showed that the physical properties of mortars were influenced by the type of residual foundry sand used as a substitute for the aggregate, with heat treated residual foundry sand leading to a decrease in compressive strength for the mortars. The pozzolanic effect achieved in the clay from the sand washing did not translate to an improvement in compressive strength for mortars containing heat treated residual foundry sand.
MATERIALES DE CONSTRUCCION
(2021)
Article
Construction & Building Technology
Ariel Berrio, Jorge Tobon, A. G. De la Torre
Summary: The synthesis kinetics of calcium sulfoaluminate polymorphs, OY and CY, were studied. The activation energy and frequency factor of both polymorphs were determined. The coexistence of both polymorphs was found to be crucial in the kinetic study.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Oscar O. Vasquez-Torres, Francisco D. Cabrera-Poloche, Jorge Tobon
Summary: Calcined clays can be used as supplementary cementitious materials to reduce CO2 emissions. Multicomponent clays from metamorphic rocks show potential as pozzolanic materials with thermal activation.
CLAYS AND CLAY MINERALS
(2022)
Article
Chemistry, Physical
Diana Gomez-Cano, Yhan P. Arias-Jaramillo, Roberto Bernal-Correa, Jorge I. Tobon
Summary: This research focused on improving the quality of recycled concrete fine aggregates (RFA) through the use of diammonium hydrogen phosphate (DAP). The study examined the impact of DAP treatment on the durability performance of mortars with partially and fully substituted treated RFA. The results indicated that using a minimum DAP concentration led to a maximum reduction in RFA water absorption by up to 33%, resulting from pore refinement and the formation of calcium phosphates. Carbonation did not significantly affect the durability of mortars with DAP-treated RFA, and an inversely proportional relationship was found between accelerated carbonation and compressive strength.
Article
Construction & Building Technology
Ary A. Hoyos-Montilla, Jorge I. Tobon, Francisca Puertas
Summary: This research examines the influence of calcium hydroxide on the alkaline activation of coal fly ash with sodium hydroxide. The presence of calcium hydroxide increased the compressive strength and modified the type and quantity of cementing gels.
CEMENT & CONCRETE COMPOSITES
(2023)
Review
Construction & Building Technology
D. Gomez-Cano, Y. P. Arias-Jaramillo, R. Bernal-Correa, J. I. Tobon
Summary: This paper focuses on the enhancement treatments for coarse and fine recycled concrete aggregates (RCAs) and their effect on the durability of recycled concrete (RC). The study demonstrates that reducing water absorption in RCAs increases the compressive strength of RC and shows a strong linear trend in improving carbonation depth, chloride ion penetration, and compressive strength of RC. Treatment mechanism and particle size are key factors in efficiently improving RC durability.
MATERIALES DE CONSTRUCCION
(2022)
Article
Construction & Building Technology
Ana Gomez, Jorge I. Tobon, Carlos Orozco
Summary: The high affinity between polycarboxylate-based superplasticizer admixtures and aggregates containing clay has been a challenge in concrete production. This study investigates the adsorption of the admixtures on two types of clays and the effectiveness of using quaternary ammonium compounds as sacrificial agents.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Natalia Betancur-Granados, Jorge Tobon, Oscar Jaime Restrepo-Baena
Summary: Flame Spray Pyrolysis (FSP) is a promising method for large-scale nanoparticle production, with potential for scalability and continuous production. This review discusses the chemical and physical phenomena involved in the process, from preparation of starting solution to formation of nanoparticles, and emphasizes the importance of synthesis setup design on material properties.
MATERIA-RIO DE JANEIRO
(2021)
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)
