Article
Chemistry, Physical
Yesim Tarhan, Remzi Sahin
Summary: The addition of air-entraining admixture (AEA) to mortars designed for 3D printing can decrease certain properties while increasing others, pointing to the need for a unique chemical admixture tailored for 3D printable mortars.
Article
Construction & Building Technology
B. A. Silva, A. P. Ferreira Pinto, A. Gomes, A. Candeias
Summary: This study evaluated the effects of water-reducing and viscosity-modifying admixtures in lime mortars, finding that water-reducing admixtures can improve mechanical strength but delay carbonation, while potato starch can increase porosity and carbonation rate without affecting mechanical strength. The combined use of these two admixtures can help minimize the disadvantages associated with their individual utilization in lime mortars.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Tao Chen, Zhihang Wang, Erlei Bai, Ang Wang, Xin Luo
Summary: The effects of three kinds of nano admixtures on the fluidity, strength, internal temperature, micro-morphology, mineral composition and pore structure of sul-phoaluminate cement mortar were studied. The results showed that the optimal content of silica fume, nano-SiO2, and nano-CaCO3 were 3%, 0.5%, and 0.5% respectively, which resulted in the highest fluidity and strength of the mortar. Nano admixtures can also optimize the pore structure of the mortar at the age of 1 d.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Polymer Science
Tommasina Coviello, Franco Alhaique, Chiara Di Meo, Pietro Matricardi, Elita Montanari, Nicole Zoratto, Mario Grassi, Michela Abrami
Summary: This study investigates the effects of the addition of borax on a mixed system of Scleroglucan and guar gum. It reveals synergistic effects in terms of critical time, mesh size, and crosslinking density. The study also finds that the flexible chains of guar gum contribute to the self-healing properties of the mixed gel system.
EXPRESS POLYMER LETTERS
(2022)
Article
Chemistry, Applied
Athina Theocharidou, Sylvie Lousinian, Apostolos Tsagaris, Christos Ritzoulis
Summary: This study investigates the molecular interactions between guar gum and mucin in order to understand their behavior and functionality during digestion. The results show that pH values affect the phase stability and particle size distributions of guar gum and mucin mixtures. The shear viscosity is mainly influenced by guar gum, while negative synergies are observed in the extensional viscosity when mucin coexists with guar gum.
FOOD HYDROCOLLOIDS
(2022)
Article
Biochemistry & Molecular Biology
Showkat Ali Ganie, Rayees Ahmad Naik, Akbar Ali, Tariq Ahmad Mir, Nasreen Mazumdar
Summary: Guar gum was utilized as a complexing agent for iron to obtain a polysaccharide-bound iron (II) complex in this study. The guar gum-based delivery system showed pH-sensitive behavior towards the controlled release of iron. The new functionalized guar gum iron complexes exhibited positive effects on improving hematological index and growth in rats with iron deficiency anemia.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Food Science & Technology
Zahra Zamani, Seyed Mohammad Ali Razavi
Summary: Water-in-water emulsions were prepared by mixing basil seed gum (BSG) with different concentrations of waxy corn starch (WCS) or high pressure-treated waxy corn starch (HWCS). Increasing the concentration of WCS or HWCS enhanced the stability and viscosity of the emulsions while reducing the droplet size. Microscopic images showed an increase in the number of droplets without coalescence due to electrostatic repulsion. The results demonstrate the potential of using BSG in combination with WCS/HWCS as stable W/W emulsions.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Ankit Saxena, Deepak Kumar, Naresh Tandon
Summary: The grease industry extensively uses harmful ingredients that harm the environment, but a potential alternative has not yet been found. This study explores the use of bio-polymers as additives to enhance the performance of eco-friendly greases. The results show that one bio-polymer significantly improves the anti-wear and friction characteristics of the grease, while the other performs poorly, due to their distinct interaction tendencies with organoclay.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Construction & Building Technology
Bruna Silva, Ana Paula Ferreira Pinto, Augusto Gomes, Antonio Candeias
Summary: The study found that the water-reducer based on polynaphthalene sulfonate and the water-repellent based on silicone resin significantly improved the freeze-thaw resistance of lime mortars, followed by the air-entrainers based on sodium dodecyl sulfate and sodium alfa-olefin sulfonate. Tensile strength and water absorption capacity were identified as the main factors influencing mortar resistance to freeze-thaw cycles. Ultrasonic pulse velocity and drilling resistance were valuable methods for detecting changes in mechanical properties due to freeze-thaw cycles.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Hasan Erinc Keser, Kambiz Ramyar, Adil Gultekin
Summary: The effects of different types of water-reducing admixtures on fly ash-based geopolymer mortars and slag-based alkali-activated mortars were investigated. The study found that the admixtures did not have a positive effect on the fresh properties of the mortars, and the improvements in flow properties were due to the extra water contributed by the admixture. The addition of admixtures also reduced the compressive strength of the mortars.
STRUCTURAL CONCRETE
(2023)
Article
Construction & Building Technology
Rafael Zarzuela Sanchez, Jorge Gonzalez-Coneo, Manuel Luna, Ana Diaz, Maria Jesus Mosquera
Summary: Hydrophobic mortars are produced by combining a silane-based admixture with the pre-treatment of the aggregates with an alkoxysilane-ended fluoropolymer. A comparative study is conducted to evaluate the impact of different components and curing conditions on the hydrophobicity, mechanical performance, composition, and micro-structure. The combination of both strategies allows achieving hydrophobic properties under varying curing conditions, compensating for the limitations of silane admixtures.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Ilker Bekir Topcu, Aytac Unverdi, Vural Yildirim
Summary: This paper examines the changes in the strength of mortar by conducting experiments with different temperatures and ratios of admixture materials. The results indicate that the temperature and admixture ratios can affect the performance of mortar.
COMPUTERS AND CONCRETE
(2022)
Article
Construction & Building Technology
Muhammet Gokhan Altun, Suleyman Ozen, Ali Mardani-Aghabaglou
Summary: The study investigated the effect of side chain length changes of polycarboxylate-ether-based HRWR admixture on fresh properties and flowability of cementitious systems. The results showed that increasing side chain length had a positive impact on flowability up to a certain value, beyond which it adversely affected the flow properties.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Shengli Wu, Chaocan Zhang, Fen Zhou, Shuangping Ma, Hancheng Zheng
Summary: The use of nano-scale calcium stearate emulsion can significantly improve the integral waterproof performance and chloride resistance of cement mortar, enhancing the durability of cement-based concrete materials.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Lin Lu, Zhengxian Yang, Kang Li, Kunchao Zhang, Xueyuan Yan, Giuseppe Carlo Marano, Bruno Briseghella
Summary: This study investigated the synergistic effect of granite powder and different mineral admixtures on the properties of manufactured sand mortar. The results showed that the combination of these materials had a positive impact on the mortar's performance.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Thomas Poinot, Marie-Claude Bartholin, Alexandre Govin, Philippe Grosseau
CEMENT AND CONCRETE RESEARCH
(2015)
Article
Geography, Physical
E. Capron, A. Govin, R. Feng, B. L. Otto-Bliesner, E. W. Wolff
QUATERNARY SCIENCE REVIEWS
(2017)
Article
Energy & Fuels
Brieuc Evangelista, Patricia Arlabosse, Alexandre Govin, Sylvain Salvador, Olivier Bonnefoy, Jean-Louis Dirion
Article
Construction & Building Technology
Thomas Poinot, Alexandre Govin, Philippe Grosseau
CEMENT AND CONCRETE RESEARCH
(2013)
Article
Construction & Building Technology
Thomas Poinot, Alexandre Govin, Philippe Grosseau
CEMENT AND CONCRETE RESEARCH
(2014)
Article
Construction & Building Technology
Thomas Poinot, Alexandre Govin, Philippe Grosseau
CEMENT AND CONCRETE RESEARCH
(2014)
Article
Construction & Building Technology
Thomas Poinot, Kawtar Benyahia, Alexandre Govin, Thomas Jeanmaire, Philippe Grosseau
CONSTRUCTION AND BUILDING MATERIALS
(2013)
Article
Biotechnology & Applied Microbiology
Thu Hien Tran, Alexandre Govin, Rene Guyonnet, Philippe Grosseau, Christine Lors, Eric Garcia-Diaz, Denis Damidot, Olivier Deves, Bertrand Ruot
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2012)
Article
Biotechnology & Applied Microbiology
Thu Hien Tran, Alexandre Govin, Rene Guyonnet, Philippe Grosseau, Christine Lors, Denis Damidot, Olivier Deves, Bertrand Ruot
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2013)
Article
Biotechnology & Applied Microbiology
Thu Hien Tran, Alexandre Govin, Rene Guyonnet, Philippe Grosseau, Christine Lors, Denis Damidot, Olivier Deves, Bertrand Ruot
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2014)
Article
Engineering, Chemical
Laetitia Vieille, Alexandre Govin, Philippe Grosseau
Article
Construction & Building Technology
Alexandre Govin, Marie-Claude Bartholin, Wolfram Schmidt, Philippe Grosseau
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Construction & Building Technology
Rachid Belhadi, Alexandre Govin, Philippe Grosseau
Summary: This study investigated the impact of citric acid, PCE, and their combination on the hydration and workability of CSA, finding that citric acid could help retain the dispersion efficiency of PCE over time, although it also decreased the initial dispersion efficiency. A dispersion model was proposed to describe the mechanism of action of these admixtures on CSA.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Linda Anes, Mansour Tazrout, Alexandre Govin
Summary: The study suggests that treating wood with boiling water can improve the compatibility between wood and cement, affecting the hydration kinetics of the cement. Higher wood powder content delays the hydration reaction of cement components and slows down the hydration rate of silicate phases. The presence of wood extractives does not affect the formation of ettringite.
MATERIAUX & TECHNIQUES
(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)
