Article
Construction & Building Technology
Dongting Cao, Yue Gu, Linhua Jiang, Weizhun Jin, Kai Lyu, Mingzhi Guo
Summary: The incorporation of carbon fixation components (calcium hydroxide) can enhance the carbon fixation performance of foam concrete but reduce its mechanical properties. To mitigate the adverse effects and optimize carbon absorption properties, a certain amount of polyvinyl alcohol (PVA) was added. The study investigated the production process of nano-modified foam and analyzed the properties, micromorphology, pore structure, and mineral phases of the foam concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Multidisciplinary Sciences
Atia Nurul Sidiqa, Myrna Nurlatifah Zakaria, Arief Cahyanto, I. Made Joni, Ani Melani Maskoen
Summary: This study aimed to evaluate PEG 400 as a dispersing agent in ethanol medium in the beads milling process to prevent carbonation of the fine Ca(OH)2 particles. The results showed that PEG was able to inhibit carbonation and stabilize pH for up to 14 days, providing increased antimicrobial activity against E. faecalis. PEG also facilitates the ability of fine Ca(OH)2 particles to penetrate deeper into the dentine tubules by reducing particle size.
Article
Chemistry, Multidisciplinary
Wenting Gu, Yanfei Wei, Bingbing Liu, Liuyong Hu, Lei Zhong, Guoke Chen
Summary: The nanocomposite PAAG@Ca(OH)(2) successfully protected murals with excellent properties, opening up a new avenue for mural protection.
Article
Food Science & Technology
Pamela Mynsen Machado Martins, Nadia Nara Batista, Jose Augusto Oliveira Naves, Disney Ribeiro Dias, Rosane Freitas Schwan
Summary: This study compared the fermentative performances of fresh and microencapsulated yeasts in coffee fermentation. After 180 hours of fermentation, microencapsulated Torulaspora delbrueckii (MT) had a higher cell population than fresh Torulaspora delbrueckii (FT). The same acids and volatile compounds were detected in both fresh and microencapsulated yeast coffees. However, the yeast state influenced the concentration of these compounds. In pulped coffee, the coffee inoculated with microencapsulated Saccharomyces cerevisiae (MS) obtained the highest concentration of alcohols, esters, pyrazines, and others compared with fresh Saccharomyces cerevisiae (FS), with an increase of up to 47%. Furthermore, the coffee inoculated with MT obtained the highest concentration in almost all chemical classes in both processes compared with FT. These differences ranged up to 55%. Sensory analysis showed that the coffees inoculated with MS had dominant notes of fruity, caramel, and nuts in the natural process, while the coffees inoculated with MT had caramel, honey, and nuts in the pulped process. Therefore, microencapsulated yeasts were metabolically active and had commercial potential. Considering the analyzed parameters, MS and MT were the most suitable yeasts for natural and pulped processing, respectively.
FOOD RESEARCH INTERNATIONAL
(2023)
Article
Construction & Building Technology
Nahida Nisar, Javed Ahmed Bhat
Summary: With cost and availability constraints on conventional materials, designers are turning to alternative materials. Utilizing industrial refuse and agricultural by-products can decrease pollution levels and boost the economy. Alternative materials like rice husk ash can be substituted in cement to make construction more sustainable.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Nguyen Tien Dung, Tung Hoang, En-Hua Yang, Jian Chu, Cise Unluer
Summary: This study proposes a novel technique to enhance hydration and carbonation of reactive MgO cement (RMC) concrete by combining microbial carbonation process (MCP) with nucleation seeding (S). The introduction of urease-producing bacteria catalyzes the hydrolysis of urea, resulting in self-carbonation of RMC and the formation of hydrated magnesium hydroxy carbonates (HMHCs) under ambient conditions. Improved CO2 dissolution and formation of low crystallinity brucite further stimulate HMHC formation under accelerated carbonation conditions. The simultaneous use of MCP and S results in dense microstructures composed of HMHCs with improved morphologies, leading to significantly higher strengths compared to the control group (62 vs 20 MPa).
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Environmental
Helena Moreno, Francisco Pontiga, Jose M. Valverde
Summary: This paper investigates CO2 capture at room temperature and atmospheric pressure using a fluidized bed of Ca(OH)(2) powder, finding that an increase in relative humidity promotes CO2 capture, especially at near 100% RH. Quantitative analyses using X-ray powder diffractometry reveal that CaCO3 content in samples stored under high humidity originates from carbonation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Construction & Building Technology
Munique Fante, Francisco Roger Carneiro Ribeiro, David Brandao Nunes, Regina Celia Espinosa Modolo, Claudio de Souza Kazmierczak, Mauricio Mancio, Francisco Manoel Wohnrath Tognoli, Afonso Rangel Garcez de Azevedo, Marlova Piva Kulakowski
Summary: This study evaluated the physical and chemical effects of calcium carbonate limestone filler in mortar pastes subjected to accelerated carbonation. Results showed that a 25% filler substitution at a water/cement ratio of 0.42 achieved the best performance in terms of compression strength and water absorption. Carbonation primarily affected by the water/cement ratio rather than substitution level, consuming portlandite and forming calcite. Further studies identified additional calcium carbonate polymorphs after 28 days of accelerated carbonation.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Ting Jiang, Kai Cui, Jun Chang
Summary: The extensive use of Portland cement with a large carbon footprint has caused a significant climate crisis. The proportions of β-C2S and γ-C2S in C2S paste are positively correlated with compressive strength and carbonation degree. An optimum value of compressive strength (54.4 MPa) and carbonation degree (36.7%) can be achieved when β-C2S is 60 wt% and γ-C2S is 40 wt%.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Biotechnology & Applied Microbiology
Jeric Paul R. Cadiz, Rosalie. P. P. Agcaoili, Roselle. Y. Y. Mamuad, Angelo Earvin Sy Choi
Summary: With the growth of population, there is a need to address the depletion of non-renewable energy sources and their negative environmental effects. This study focuses on the production of high ethanol yields from plant-based biofuel through immobilized yeast. The findings show that immobilized yeast has a higher ethanol concentration and conversion compared to free yeast. The study provides important insights for efficient ethanol production and rates a score of 8 out of 10.
FERMENTATION-BASEL
(2023)
Article
Chemistry, Physical
Shunqin Yang, Guoxin Li, Ge Zhang
Summary: In order to resume production quickly after steelmaking, a fast repair material with good carbonation resistance is needed to repair the factory building. The performance of an ordinary Portland cement (OPC)-calcium sulfoaluminate cement (CSA) system under an accelerated carbonization environment was studied, and the OPC-CSA system with a CSA content of 15 wt% was modified by adding calcium hydroxide (CH). The results showed that the addition of CH improved the mechanical properties and carbonation resistance of the OPC-CSA system.
Article
Construction & Building Technology
Sumit Joshi, Young-Ho Ahn, Shweta Goyal, M. Sudhakara Reddy
Summary: The performance of bacterial-treated concrete structures under harsh conditions such as carbonation and chloride exposure was investigated in this study. Bacterial-treated specimens showed improved mechanical strength and reduced penetration properties. The results indicated that these specimens resisted from the deterioration effects of chloride and carbonation exposure and improved their durability properties.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Environmental
Ju Hyun Park, Sun Ha Kim, Jin Chul Kim, Byoung-Young Choi, Sang Kyu Kwak, O. H. Han, Yong-Il Kim, Seung-Woo Lee
Summary: The study observed changes in the physical and chemical properties of hydrated calcium hydroxide (Ca(OH)2) before carbonation through XRD and NMR analysis, revealing the important role of intercalated water in the carbonation reaction of Ca(OH)2. The hydrated Ca(OH)2 formed a stable structure with intercalated water molecules, leading to decreased reaction barrier and heat of reaction in the carbonation process. This study provides insight into the significance of water intercalation between the Ca(OH)2 interlayers in the carbonation reaction.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Construction & Building Technology
Marcos Lanzon, Juan A. Madrid-Mendoza, David Navarro-Moreno, Victoria E. Garcia-Vera
Summary: This paper presents a rapid method to obtain pure suspensions of Ca(OH)2 dispersed in 2-propanol using eggshell wastes (CaCO3). The synthesized Ca(OH)2 suspensions were characterized by XRD, FTIR, TG, TEM, and XRD using Rietveld refinement method. The study found that the method is advantageous due to the high purity of the eggshell and the full conversion of CaO into Ca(OH)2, eliminating the need for purification steps. Furthermore, the Ca(OH)2 from eggshell showed promising results in reinforcing architectural stone.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Biotechnology & Applied Microbiology
Cristian Varela, Lucien Alperstein, Joanna Sundstrom, Mark Solomon, Maggie Brady, Anthony Borneman, Vladimir Jiranek
Summary: This study characterized yeast isolates from the fermentation of way-a-linah and tuba, traditional fermented beverages of Australian Indigenous people. The isolates demonstrated the potential to produce fermented beverages with unique aroma and flavor profiles, highlighting the microbial diversity associated with beverages produced by Australia's Indigenous peoples.
Article
Archaeology
Ainara Zornoza-Indart, Paula Lopez-Arce, Lucia Lopez-Polin
JOURNAL OF CULTURAL HERITAGE
(2017)
Article
Optics
Javier Garcia-Guinea, Fernando Garrido, Paula Lopez-Arce, Virgilio Correcher, Juan de la Figuera
JOURNAL OF LUMINESCENCE
(2017)
Article
Construction & Building Technology
K. Zoghlami, P. Lopez-Arce, A. Zornoza-Indart
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2017)
Article
Archaeology
Ainara Zornoza-Indart, Paula Lopez-Arce, Karima Zoghlami, Nuno Leal, Joaquim Simao
STUDIES IN CONSERVATION
(2019)
Article
Environmental Sciences
Paula Lopez-Arce, Fernando Garrido, Javier Garcia-Guinea, Andreas Voegelin, Joerg Goettlicher, Jose Miguel Nieto
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Environmental Sciences
Fernando Garrido, Javier Garcia-Guinea, Paula Lopez-Arce, Andreas Voegelin, Joerg Goettlicher, Stefan Mangold, Gonzalo Almendros
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Thermodynamics
Paula Lopez-Arce, Hector Altamirano-Medina, James Berry, Dimitrios Rovas, Fernando Sarce, Steve Hodgson
BUILDING SIMULATION
(2020)
Article
Green & Sustainable Science & Technology
Jaione Korro Banuelos, Alvaro Rodriguez Miranda, Jose Manuel Valle-Melon, Ainara Zornoza-Indart, Manuel Castellano-Roman, Roque Angulo-Fornos, Francisco Pinto-Puerto, Pilar Acosta Ibanez, Patricia Ferreira-Lopes
Summary: This paper discusses the importance of information management in heritage restoration and conservation and proposes a conceptual framework to explore this relationship. Through the analysis of several specific cases, it emphasizes that while the availability of information and tools is growing, further progress is needed in terms of interoperability, outreach, and reuse of different solutions.
Article
Humanities, Multidisciplinary
Ainara Zornoza-Indart, Paula Lopez-Arce, Lucia Lopez-Polin
Summary: Chert tools from the Galeria and Gran Dolina Caves in Spain were studied to determine causes of decay and select appropriate consolidation treatments. Samples containing quartz only showed minimal alterations and required less conservation treatment, while those containing quartz and moganite were more weathered and required consolidation. Traditional consolidating products like acrylic resin and ethyl silicate, as well as novel nanoparticle-based products, were evaluated for their effectiveness in preserving these chert remains.
CONSERVAR PATRIMONIO
(2021)
Proceedings Paper
Archaeology
A. Rodriguez Miranda, J. M. Valle Melon, A. Torices, R. Lostado, P. Navarro, G. Elorriaga Agirre, J. Korro Banuelos, A. Zornoza-Indart
27TH CIPA INTERNATIONAL SYMPOSIUM: DOCUMENTING THE PAST FOR A BETTER FUTURE
(2019)
Article
Environmental Sciences
Paula Lopez-Arce, Javier Garcia-Guinea, Fernando Garrido