Article
Crystallography
Yongfan Gong, Jianming Yang, Haifeng Sun, Fei Xu
Summary: Fly ash belite cement can enhance the performance of cement by shortening setting time, improving early strength, and enhancing long-term strength. Excessive porosity will reduce the strength of cement, while fly ash belite cement promotes the formation of higher strength cement gel.
Article
Construction & Building Technology
Luis Urbano Durlo Tambara Junior, Geannina Terezinha dos Santos Lima, Laura Silvestro, Artur Spat Ruviaro, Philippe Jean Paul Gleize, Afonso Rangel Garcez de Azevedo
Summary: This study evaluated the influence of different polycarboxylate-based superplasticizer (SP) contents on PC and PC-CSA binary cement pastes. The results showed that the incorporation of SP reduced the dynamic yield stress of PC pastes, but progressively increased the yield stress of PC-CSA systems. The increase in SP content increased the main heat flow peak of PC-CSA pastes, although it did not significantly affect the cumulative heat after 160 hours of hydration. XRD and FTIR analysis confirmed higher ettringite contents in the binary systems and the presence of carboaluminates phases after 7 days of hydration in both PC and PC-CSA pastes, and hemicarboaluminate in PC-CSA pastes. CSA incorporation reduced the cumulative pore volume by up to 32% compared to PC pastes, while the evaluated SP content did not significantly affect the porosity of PC-CSA pastes.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
S. Ozuzun, B. Uzal
Summary: The significance of superplasticizers in sustainable concrete industry lies in reducing water and Portland cement content in mixtures. Development of eco-efficient alternative superplasticizers is needed. A humic-acid based superplasticizer derived from leonardite showed similar impact on early hydration kinetics and setting time of Portland cement compared to naphthalene-based admixture, while lignosulfonate caused significant retardation. LHA also increased the degree of hydration of Portland cement at 7 and 28 days, with a comparable plasticizing performance and improved compressive strength of mortars.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Osama Massarweh, Mohammed Maslehuddin, Salah U. Al-Dulaijan, Mohammed Shameem
Summary: The study found that solid retarding admixtures like heavy oil fly ash can effectively extend the setting time of cement, comparable to chemical retarders. The selected retarders also had a similar 28-day compressive strength of concrete to ordinary Portland cement, but may have an impact on early-age drying shrinkage strain.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Jianguo Chen, Yuling Zhu, Weilian Du, Mengxiang Li, Yifan Wang, Chunling Zhang, Mingsheng Shi, Binghan Xue
Summary: This study proposes the use of polycarboxylate superplasticizer to improve the performance of concrete. Experimental results show that polycarboxylate superplasticizer can delay the onset time and reduce the peak value of hydration heat in concrete, improve the density of the slurry, and decrease the amount of chemically bound water. Additionally, it can delay the overall hydration process of the concrete, slow down the adiabatic temperature increase rate and early drying shrinkage rate, and improve the mechanical properties and impermeability of the concrete.
Article
Construction & Building Technology
Tamino Hirsch, Zichen Lu, Dietmar Stephan
Summary: The hydration of cements containing different sulphate carriers, namely gypsum, hemihydrate, and anhydrite, was investigated with and without triethanolamine. The presence of triethanolamine significantly affects the hydration process by increasing the initial dissolution of aluminates, leading to an increase in aluminium species in solution, and substantial retardation of C3S hydration. Hemihydrate can suppress this impact due to its high dissolution rate.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Characterization & Testing
Tao Lu, Jinfu Fang, Zhuqing Yu, Qingzong Xue
Summary: This study investigates the use of coral powder (CP) and fly ash (FA) as partial replacements for portland cement (PC) in the production of concrete materials. The results show that the reaction of CP is slow, but can be improved by adding FA. The addition of 25% FA to a mixture of 15% CP and PC leads to a compressive strength of 52.5 MPa at 180 days, saving 40% of PC and reducing carbon emissions.
JOURNAL OF TESTING AND EVALUATION
(2023)
Article
Construction & Building Technology
Wujian Long, Jing Xie, Xuanhan Zhang, Shicong Kou, Feng Xing, Chuang He
Summary: This work proposes a new method to overcome the slow setting and low early strength of cement-based composites with high-volume fly ash (HVFA). The effects of a binary system containing calcined hydrotalcite (CHT) and Na2SO4 (NS) on the early strength, hydration process, pore structure, and microstructural morphology of HVFA composites were investigated. Results showed that the CHT and NS co-doped system exhibited better performance in improving the mechanical properties and porosity of HVFA cement than the CHT or NS single system, due to the accelerated hydration process, increased hydration product content, and refined pore structure. These findings provide guidance for enhancing the early strength of HVFA concrete in practical engineering.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Xingdong Lv, Lu Yang, Fazhou Wang, Shuguang Hu, Jiazheng Li
Summary: High-ferrite Portland cement (HFPC) has advantages in sulfur resistance, abrasion resistance, energy consumption, and CO2 emission. The effects of fly ash (FA) and phosphorus slag (PS) on the hydration process, mechanical properties, and pore structure of HFPC were studied. FA has a more significant influence than PS.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Construction & Building Technology
Alexander Mezhov, Ira Ben Shir, Asher Schmidt, Konstantin Kovler, Charles E. Diesendruck
Summary: The retardation mechanism of cement hydration caused by polyphosphate comb superplasticizer was studied using XRD, ss NMR, and calorimetry. The findings show that at low dosage, polyphosphates inhibit the silicate reaction without affecting the aluminate reaction, while at high doses, both reactions are hampered followed by an extended induction period.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Baixing Song, Xiang Hu, Songhui Liu, Caijun Shi
Summary: This study compared the chloride binding of Portland cement pastes with and without early CO2 curing and investigated the effects of FA and GGBS on the chloride binding of early CO2-cured cement paste. The results showed that the chloride binding capacity of early CO2-cured Portland cement paste was lower compared to the untreated paste, and different isotherm models were suitable for describing the two types of pastes. The chloride binding of Portland cement-fly ash-GGBS pastes subjected to early CO2 curing primarily relied on physical adsorption, and the chemical binding related to Friedel's salt was weak. The addition of FA and GGBS decreased the chloride binding capacity of early CO2-cured Portland cement paste due to the lack of calcium hydroxide. However, when CaCl2 solution was used as a soaking solution, the chloride binding of Portland cement-fly ash-GGBS pastes subjected to early CO2 curing was improved through enhanced physical adsorption. The presence of cation ions in the chloride solution had little influence on the formation of Friedel's salt.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Thermodynamics
Iwona Wilinska, Barbara Pacewska, Andrzej Ostrowski
Summary: Introducing supplementary cementitious materials can bring ecological benefits, but using a high proportion of such materials as a replacement for cement can affect the properties of the final composite. This study investigates the influence of mechanical activation on hydration and microstructure of a binder composed of fly ash and cement, and discusses the activation mechanism.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Green & Sustainable Science & Technology
Yan Xia, Minghao Liu, Yading Zhao, Xiaobing Ma
Summary: This study investigates the effect of Na2SO4 on the hydration and microstructure of Portland cement blended with a high dosage of sewage sludge ash (SSA). The addition of Na2SO4 significantly improves the compressive strength of the blended systems and enhances the microstructure. Na2SO4 also promotes the formation and growth of AFt crystals in the blended systems.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Construction & Building Technology
Zichen Lu, Jiayun Lu, Zhiwei Liu, Zhenping Sun, Dietmar Stephan
Summary: The effect of water to cement ratio on the compatibility of polycarboxylate superplasticizer with ordinary Portland cement was studied. It was found that the incompatibility between the superplasticizer and cement occurred under a low water to cement ratio of 0.27, but could be eliminated by increasing the ratio. Additionally, superplasticizers with higher charge density showed more serious compatibility issues.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Xingdong Lv, Yan Shi, Yuanyi Wang, Jiazheng Li
Summary: This study found the benefits of using phosphorus slag (PS) instead of fly ash (FA) in low-heat Portland cement blends. PS has inferior mechanical properties and lower hydration heat compared to FA after the first three days, but reaches a similar level at 180 days. The effects of pozzolanic reaction and pore structure refinement are more pronounced in PS, resulting in higher Qmax values.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Ophthalmology
Jeremy J. Hoffman, Reena Yadav, Sandip D. Sanyam, Pankaj Chaudhary, Abhishek Roshan, Sanjay K. Singh, Sailesh K. Mishra, Simon Arunga, Victor H. Hu, David Macleod, Astrid Leck, Matthew J. Burton
Summary: This study aimed to investigate whether the use of low-cost 0.2% chlorhexidine gel is noninferior to 5% topical natamycin for the treatment of filamentous fungal keratitis. The results showed that natamycin treatment is associated with significantly better visual acuity and fewer adverse events compared to chlorhexidine treatment.
Article
Microbiology
Jeremy J. Hoffman, Reena Yadav, Sandip Das Sanyam, Pankaj Chaudhary, Abhishek Roshan, Sanjay Kumar Singh, Simon Arunga, Victor H. Hu, David Macleod, Astrid Leck, Matthew J. Burton
Summary: This study investigated the clinical and epidemiological features of microbial keratitis in Nepal and developed a predictor score to determine the microbial aetiology. Fungal infection was found to be the main cause of keratitis, with dematiaceous fungi being particularly prevalent. Serrated infiltrate margins, patent nasolacrimal duct, raised corneal slough, and organic trauma were identified as independent predictors of fungal keratitis.
Article
Plant Sciences
Brij Bala Mattoo, Avneet Pal Singh, Gurpaul Singh Dhingra, Sanjay Kumar Singh, Shiwali Rana, Deepak Kumar Maurya
Summary: This paper reports a new species of Gloeophyllum collected from the Doda district of Jammu and Kashmir, India. The species, named Gloeophyllum longisporum, is different from previously described taxa within the genus based on morphological features and phylogenetic analysis.
Article
Physics, Condensed Matter
Shakeel Ahmad Sofi, Thamraa Alshahrani, Manal Morsi, Dinesh C. Gupta
Summary: This study investigates the physical properties of two Cobalt-based Heusler materials using density functional theory calculations and Boltzmann transport simulations. The results show that these materials exhibit half-metallic behavior, ferromagnetic half-metallic character, good mechanical stability, and directional-dependent thermal conductivity.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2022)
Article
Management
Ranya Saeed Alhumoudi, Sanjay Kumar Singh, Syed Zamberi Ahmad
Summary: Perceived corporate social responsibility has a positive impact on passionate attitudes towards work and mediates the relationship between perceived CSR and innovative work behavior. The study suggests mixed-method investigations for future research and emphasizes the importance of engaging in CSR activities for organizations. Passionate Gen Y nurses play a valuable role in improving patient care services through innovative work behavior.
INTERNATIONAL JOURNAL OF ORGANIZATIONAL ANALYSIS
(2023)
Article
Biochemistry & Molecular Biology
Sanjeev Meena, Radheshyam Sharma, Sanjay Kumar Singh, Ashish Kumar, R. Shiv Ramakrishnan, Stuti Sharma, G. K. Koutu, Lokesh Gaur
Summary: This study characterized the genetic diversity of farmers' varieties in central India using SSR markers and blast-linked markers. The results showed clear geographical discrimination among the varieties and the presence of multiple blast resistance genes, which could be utilized in future breeding programs.
JOURNAL OF PLANT BIOCHEMISTRY AND BIOTECHNOLOGY
(2023)
Article
Chemistry, Analytical
Kanchan Yadav, Shubham Garg, Ankush Kumar Singh, Sanjay Singh, Avanish Singh Parmar, Rosy
Summary: This study presents a facile approach to fabricate a Protein Nanodots (PNDs) conjugated AuNP, poly-Lysine biointerface for the estimation of Melatonin. The fabricated biointerface exhibits excellent detection performance and specific interactions.
MICROCHEMICAL JOURNAL
(2022)
Article
Computer Science, Information Systems
Durgesh Singh, Sanjay K. Singh, Sandeep Sambhaji Udmale
Summary: In this paper, a self-embedding block-wise fragile image watermarking scheme is proposed for authentication, localization, and recovery with enhanced accuracy. The scheme splits the cover image into non-overlapping blocks and calculates restoration and authentication bits from the MSBs planes. The proposed scheme achieves high-quality restoration and significant authentication possibilities for each block, with high Peak Signal to Noise Ratio and Normalized Correlation Coefficient up to 50% tampering rate.
MULTIMEDIA TOOLS AND APPLICATIONS
(2023)
Article
Mycology
P. W. Crous, J. Boers, D. Holdom, E. R. Osieck, T. Steinrucken, Y. P. Tan, J. S. Vitelli, R. G. Shivas, M. Barrett, A-G Boxshall, J. Broadbridge, E. Larsson, T. Lebel, U. Pinruan, S. Sommai, P. Alvarado, G. Bonito, C. A. Decock, S. De la Pena-Lastra, G. Delgado, J. Houbraken, J. G. Macia-Vicente, H. A. Raja, A. Rigueiro-Rodriguez, A. Rodriguez, M. J. Wingfield, S. J. Adams, A. Akulov, T. AL-Hidmi, V Antonin, S. Arauzo, F. Arenas, F. Armada, J. Aylward, J-M Bellanger, A. Berraf-Tebbal, A. Bidaud, F. Boccardo, J. Cabero, F. Calledda, G. Corriol, J. L. Crane, J. D. W. Dearnaley, B. Dima, F. Dovana, A. Eichmeier, F. Esteve-Raventos, M. Fine, L. Ganzert, D. Garcia, D. Torres-Garcia, J. Gene, A. Gutierrez, P. Iglesias, L. Istel, P. Jangsantear, G. M. Jansen, M. Jeppson, N. C. Karun, A. Karich, P. Khamsuntorn, K. Kokkonen, M. Kolarik, A. Kubatova, R. Labuda, A. C. Lagashetti, N. Lifshitz, C. Linde, M. Loizides, J. J. Luangsa-ard, P. Lueangjaroenkit, S. Mahadevakumar, A. E. Mahamedi, D. W. Malloch, S. Marincowitz, A. Mateos, P-A Moreau, A. N. Miller, A. Molia, A. Morte, A. Navarro-Rodenas, J. Nebesarova, E. Nigrone, B. R. Nuthan, N. H. Oberlies, A. L. Pepori, T. Rama, D. Rapley, K. Reschke, B. M. Robicheau, F. Roets, J. Roux, M. Saavedra, B. Sakolrak, A. Santini, H. Sevcikova, P. N. Singh, S. K. Singh, S. Somrithipol, M. Spetik, K. R. Sridhar, M. Starink-Willemse, V. A. Taylor, A. L. van Iperen, J. Vauras, A. K. Walker, B. D. Wingfield, O. Yarden, A. W. Cooke, A. G. Manners, K. G. Pegg, J. Z. Groenewald
Summary: This study describes novel species of fungi from various countries, including Australia, Canada, Czech Republic, France, India, Israel, Italy, Netherlands, Norway, Portugal, South Africa, Spain, Sweden, Thailand, Ukraine, and USA. The morphological and culture characteristics of these fungi are supported by DNA barcodes.
Article
Business
Tachia Chin, Yi Shi, Sanjay Kumar Singh, George Kwame Agbanyo, Alberto Ferraris
Summary: This study investigates the impact of blockchain technology on ecosystem-based business models (EBMs) from a dynamic capability perspective. The results suggest that value appropriation capability plays a crucial role in realizing green innovation through blockchain technology in EBMs. This study offers new insights into the mechanisms between disruptive technology and the evolution towards EBMs, and provides practical guidance for organizations to inspire green innovation and establish sustainable EBMs.
TECHNOLOGICAL FORECASTING AND SOCIAL CHANGE
(2022)
Article
Construction & Building Technology
Raju Goyal, Vinay K. Verma, N. B. Singh
Summary: The cement industry is under significant pressure to reduce carbon dioxide emissions, which account for nearly 7% of global emissions. Supplementary cementitious materials can effectively lower these emissions, but they also have adverse effects on the performance of cement. Nanomaterials, however, can offset these adverse effects and offer additional benefits by reducing CO2 intensity.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Ashish Malik, Sanjay Kumar Singh
Summary: An experimental program was conducted to determine the dynamic properties of pond ash and the effects of additives such as crumb rubber and coir fiber. The results showed that crumb rubber improved the liquefaction resistance of pond ash, while coir fiber had no significant effect on it. The dynamic shear modulus of pond ash decreased when mixed with crumb rubber, but increased significantly when mixed with coir fiber.
JOURNAL OF RENEWABLE MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Anupam Agarwal, Bushra Shaida, Mayuri Rastogi, Nakshatra Bahadur Singh
Summary: Food packaging plays a crucial role in food preservation and quality improvement. Biodegradable plastics are considered as environmentally friendly alternatives to non-biodegradable plastics. However, there is a lack of comprehensive information, and further research is needed to address the challenges of commercialization.
CHEMISTRY AFRICA-A JOURNAL OF THE TUNISIAN CHEMICAL SOCIETY
(2023)
Article
Business
Haoyu Liu, Kim Hua Tan, Ajay Kumar, Sanjay Kumar Singh, Leanne Chung
Summary: This study explores the microfoundations of value co-creation by external actors (viewers and streamers) on sports live streaming platforms (SLSPs) through empirical research. It reveals the value co-creation activities between viewers and streamers in different activities, as well as the unique value-in-use among them. The model presented in this study demonstrates that the viewers' engagement and the microlevel value co-creation activities between viewers and streamers determine the formation of value-in-use, contributing to the competitive advantages for SLSPs at a macrolevel. This study contributes to the existing literature on engagement behavior and value co-creation in the context of SLSPs, by empirically examining the role of external actors' engagement as the microfoundations of value cocreation.
IEEE TRANSACTIONS ON ENGINEERING MANAGEMENT
(2022)
Article
Food Science & Technology
Nusrat Jan, H. R. Naik, Gousia Gani, Omar Bashir, Tawheed Amin, Sajad Mohd Wani, Shakeel Ahmad Sofi
Summary: This study examined the impact of rice flour incorporation on various quality attributes of low-gluten wheat-based pretzels. The results showed that the addition of rice flour increased the swelling power and bulk density, while decreasing the oil absorption capacity, solubility index, foaming capacity, and foaming stability. The study also found that the incorporation of rice flour affected the elastic modulus, starch digestion characteristics, and texture of the flour blend. Furthermore, the developed low-gluten pretzels with rice flour had higher mineral profile and lightness, and better overall acceptability.
FOOD PRODUCTION PROCESSING AND NUTRITION
(2022)
