Article
Construction & Building Technology
Zuzana Slizkova, Dita Frankeova, Milos Drdacky
Summary: The effects of multiple applications of Calosil(R) nanolime products on Maastricht limestone were studied. The experiments showed good penetration of the nanolime products into the limestone, leading to increased bending and compressive strengths and reduced porosity.
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
Maria Apostolopoulou, Elissavet Drakopoulou, Maria Karoglou, Asterios Bakolas
Summary: The study focuses on the consolidation of polluted Pentelic marble to protect architectural heritage. It found that nanolime outperforms traditional reinforced lime in consolidation efficiency, and the addition of sodium stearate reduces micro-cracking and leads to a more homogenous marble surface.
MATERIALS AND STRUCTURES
(2021)
Article
Construction & Building Technology
J. S. Pozo-Antonio, J. Otero
Summary: Consolidation treatment with nanolime often uses a wet cellulose poultice to improve penetration and surface appearance. However, the influence of the poultice on consolidation effectiveness is not well studied or understood yet, and the most suitable application method should be chosen based on the specific characteristics of nanolime and substrate.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
J. Otero, J. S. Pozo-Antonio, C. Montojo
Summary: Nanolime has been recognized as a promising consolidation approach for historic calcareous substrates due to its compatibility, durability, and fast carbonation. This study aimed to investigate the influence of application method and number of applications on the effectiveness of nanolime treatments, finding that repeated applications of low concentrated nanolime can enhance the consolidation effectiveness, while the application method does not significantly affect the overall outcome.
MATERIALS AND STRUCTURES
(2021)
Article
Architecture
J. Otero, A. E. Charola, V. Starinieri
Summary: The conservation of historic structures requires the use of materials that are compatible with the originals. Nanolime has been considered a promising product for the consolidation of calcareous substrates due to its compatibility and durability. This study focuses on investigating nanolime treatments for Indiana limestone and weathered marble. The results show that nanolime is most effective when treated surfaces are exposed to high humidity or regularly sprayed with carbonated water.
INTERNATIONAL JOURNAL OF ARCHITECTURAL HERITAGE
(2022)
Article
Construction & Building Technology
V. Daniele, G. Rosatelli, L. Macera, G. Taglieri
Summary: This paper presents an innovative approach to safeguard the hypogea environment of religious buildings by using new aqueous nanolime formulations. The use of these formulations improves the mechanical resistance and cohesion of the surface, without causing significant surface chromatic alterations.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Nobuyoshi Koga, Yasuhiro Sakai, Masahiro Fukuda, Daichi Hara, Yuu Tanaka, Loic Favergeon
Summary: The thermal decomposition of smithsonite was studied under different heating and atmospheric conditions. The effect of CO2 and H2O on the reaction temperature was identified as specific characteristics of the system. The kinetic behavior of the reaction was explained by considering the retardation effect of CO2 and the catalytic effect of water vapor.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Construction & Building Technology
B. Sena da Fonseca, A. P. Ferreira Pinto, M. Rucha, M. M. Alves, M. F. Montemor
Summary: Consolidation improves the cohesion of stones and preserves stone-built heritage. However, it also modifies other characteristics that affect stone vulnerability to salt crystallization, especially in porous limestones. This study evaluates the compatibility of alkoxysilanes and phosphate-based treatments with a historic porous limestone in both short-term and medium/long-term perspectives. The findings reveal the potential risks of salt entrapment and development of subflorescences when using consolidants, highlighting the importance of addressing consolidation of damaged stones with proper compatibility.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Nicolaus N. N. Mahasti, Jui-Yen Lin, Yu-Jen Huang, Jun-Yi Wu, Ming-Chun Yen, Yu -Hsiang Chiu, Yao-Hui Huang
Summary: Chemical oxo-precipitation (COP) is a facile method to remove boron by precipitating perborate salts using hydrogen peroxide. This study improves the COP method by using calcium precipitant (Ca-COP) to achieve comparable boron removal without generating hazardous waste. The formation of calcium carbonate and calcium peroxide, together with the precipitation of calcium perborate, play decisive roles in the Ca-COP process. A multistage Ca-COP process is developed to prevent incongruent dissolution and enhance sorptive removal, effectively reducing boron levels from 1000 to 5 mg-B/L.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Biochemistry & Molecular Biology
Ihn Han, Chulwoo Rhee, Doyoung Kim
Summary: This study explores the effects of calcium magnesium carbonate nanoparticles on plants, bacteria, and cancer cells, finding that they have stimulating effects on plant growth and inhibitory effects on bacteria and cancer cells.
Article
Construction & Building Technology
Rotana Hay, Ghanim Kashwani, Kemal Celik
Summary: The limited use of lime in construction due to the emergence of modern Portland cement has shown potential as a sustainable alternative to cement. By studying the carbonation and strength development of calcined limestone, it was found that raw limestone as a partial replacement significantly improved carbonation degree and mechanical properties. The formation of interconnected calcite network led to higher compressive strength compared to disjoint particles or agglomerates formed by supercritical CO2.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Archaeology
Joao Trovao, Fabiana Soares, Igor Tiago, Lidia Catarino, Antonio Portugal, Francisco Gil
Summary: This study evaluated the growth of different fungi on stone replicas and found that different fungi performed differently under different nutrient environments. In addition, aesthetic alterations caused by fungal growth, as well as possible erosion and mineralization phenomena of calcite layers by fungi, were observed.
JOURNAL OF CULTURAL HERITAGE
(2021)
Article
Engineering, Environmental
Eyad Smadi, Mehdi Jafarian, Bassam Dally, Graham J. Nathan
Summary: A process for carbon capture from limestone calcination in a steam atmosphere generated by hydrogen and oxygen combustion has been developed. This process allows for carbon dioxide capture by condensing steam from exhaust gases, eliminating the energy-intensive step of carbon dioxide separation. A techno-economic analysis shows that cost parity can be achieved once the price of hydrogen reaches a certain range.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
A. Esquivias-Fierro, J. R. Gonzalez-Lopez, L. Chavez-Guerrero
Summary: The study introduces a method for synthesizing calcium carbonate films using ash as raw material, with a nylon mesh facilitating calcium uptake and achieving a recovery of up to 64%. The technique has potential for large scale production of highly pure CaCO3 powder, as confirmed by analysis using various techniques including scanning electron microscopy and Raman spectroscopy.
WASTE AND BIOMASS VALORIZATION
(2021)
Article
Archaeology
Giacomo Vinci, Alessandro Fontana, Giorgia Musina, Lucia Mancini, Carmine Lubritto, Lucia Liccioli, Federico Bernardini
Summary: Depositional and erosional processes, subsidence and sea-level changes have significantly impacted the coastal landscape of northern Adriatic lagoons. The retrieval and analysis of six metal swords from Marano Lagoon, combined with the study of the coastal paleo-environment, revealed the historical importance of the area and the significant morphological changes that have occurred there. The data also indicate that Marano Lagoon served as a major hub in the northern Adriatic during the Late Middle Ages and Early Modern times, connecting inland Europe with the Mediterranean Sea. Furthermore, the research highlights the onset of coastal erosion and its possible causes.
Article
Materials Science, Ceramics
Lucie Zarybnicka, Jana Machotova, Petra Macova, Alberto Viani
Summary: The role of carboxyl functional groups in acrylic latex on fabricating an organic-inorganic composite material based on magnesium phosphate cement was investigated. The acidic nature of the latex aqueous medium enhanced the dissolution of magnesium oxide in the initial stages of the cement reaction. The deprotonation of carboxyl groups due to increased pH promoted surface adsorption effects, which controlled the nucleation and growth of reaction products. The resulting hindering effect slowed down reaction rates, delaying the precipitation of solid phosphates and leading to improved properties of the composite.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Alberto Viani, Petra Macova, Radek Sevcik, Lucie Zarybnicka
Summary: Citric acid enhances the dissolution of MgO and delays the nucleation of phosphates in magnesium phosphate cements. Citrates complex the released Mg2+ ions, reducing the degree of supersaturation. The adsorption of citrate hinders crystal growth and amorphous-to-crystalline transformation.
CERAMICS INTERNATIONAL
(2023)
Article
Electrochemistry
Benedetto Bozzini, Marco Boniardi, Tommaso Caielli, Andrea Casaroli, Elisa Emanuele, Lucia Mancini, Nicola Sodini, Jacopo Strada
Summary: Secondary Zn-based batteries are a promising alternative to Li batteries for stationary storage, but their commercialization is hindered by issues such as anode shape-change and passivation. This study investigates the use of mildly acidic electrolytes to limit the unstable growth of Zn, with a focus on the impact of specific quaternary ammonium salts as electrolyte additives. The results show that TBAB is the most effective additive for low-current density operation, while additive-free electrolyte performs better at high current densities, consistent with previous findings for alkaline electrolytes.
Article
Chemistry, Inorganic & Nuclear
Lucie Zarybnicka, Martin Marek, Radek Sevcik, Radek Stolin, Jaroslav Pokorny, Jiri Sal
Summary: This work characterizes 3D printed structures with different infill densities made of a thermoplastic material containing magnetic particles. The study finds that the relative permeability depends on the internal structures of the printed products, with samples of denser structures showing higher permeability. Finite Element Modelling simulations were used to determine magnetic field distributions and holding forces for all printed samples. The results suggest that the produced composites can be used as magnetic switches and sensors, or advanced components for homogenizing electric motors' magnetic fields.
Article
Construction & Building Technology
Lucie Zarybnicka, Jaroslav Pokorny, Jana Machotova, Radek Sevcik, Jiri Sal, Alberto Viani
Summary: New acrylic latex additives with and without keto-hydrazide crosslinking were prepared and incorporated into Portland cement-based mortars. The results showed that the latexes without crosslinking had the highest effect on heat flow evolution. The addition of both latex types increased the open porosity and decreased the mechanical strength of the cement composites, but improved the liquid water transport properties.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
R. Punturo, V. Indelicato, G. Lanzafame, R. Maniscalco, E. Fazio, A. Bloise, L. Muschella, R. Cirrincione
Summary: The study aims to investigate the relationship between microstructural properties and bitumen impregnation in Pitchstone, which gives this valuable geomaterial its distinctive shades and excellent physical-mechanical properties. Various techniques including optical microscopy, synchrotron X-ray microtomography, ultrasonic testing, gas chromatographic analysis, differential scanning calorimetry, and thermogravimetry were used to analyze two differently impregnated samples representing the main pitchstone lithotypes. The results revealed a close relationship between petrofabric, petrophysical properties, and impregnation amount.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Geochemistry & Geophysics
Gabriele Lanzafame, Alexander Bolam, Andrea Di Muro, Silvia Portale, Sandro Donato, Pascale Besson, Carmelo Ferlito
Summary: In this study, the Bellecombe products were investigated using various techniques to characterize the evolution of the magmatic system feeding the eruptive activity in Piton de la Fournaise. The results suggest that the lava flows share a geochemical affinity with the main series documented at the volcano, indicating the dynamic activity of the plumbing system in the recent past.
Article
Construction & Building Technology
Jaroslav Pokorny, Radek Sevcik, Lucie Zarybnicka, Lubos Podolka
Summary: This study aimed to investigate the effect of partially substituting ordinary Portland cement (OPC) with biochar (BC) and coal dust (CD) on the properties of hardened specimens. The results showed that replacing OPC with small amounts of BC and CD led to an increase in mechanical strengths due to decreased porosity and enhanced formation of hydration products. Overall, these alternative materials have the potential to contribute significantly to the long-term sustainability of the construction industry.
Article
Materials Science, Ceramics
Davide Bernasconi, Alberto Viani, Lucie Zarybnicka, Petra Macova, Simone Bordignon, Caterina Caviglia, Enrico Destefanis, Roberto Gobetto, Alessandro Pavese
Summary: This study investigates the incorporation of solid waste incineration fly ash into phosphate-based geopolymers as a substitute for metakaolin. Analytical techniques such as X-ray diffraction, scanning electron microscopy, solid-state nuclear magnetic resonance spectroscopy, and infrared spectroscopy were used to analyze the changes in mineralogy and structural modifications of the geopolymer networks, which affected the mechanical performance of the materials. The results show that fly ash behaves differently from metakaolin, primarily acting as an alkali source and competing with the aluminosilicate metakaolin fraction by precipitating crystalline and amorphous phosphates. The substitution of 10% metakaolin with fly ash preserves the amorphous geopolymer matrix and retains the mechanical properties. However, at higher waste content (30-50% wt), the fast acid-base reactions involving the fly ash reactive phases dominate, leading to a shift in the material nature towards an alkali-phosphate cement/phosphate-geopolymer composite. This change, along with the development of porosity and the presence of low-strength phases in the ash, results in a decline in mechanical performance. Overall, this work provides valuable information for the sustainable utilization of phosphate-based geopolymers, while highlighting the recycling potential for this type of fly ash.
CERAMICS INTERNATIONAL
(2023)
Article
Archaeology
Radek Sevcik, Jana Machotova, Lucie Zarybnicka, Petra Macova, Alberto Viani
Summary: This investigation evaluates the use of polyacrylate latex nanodispersions as consolidation agents for sandstones. Four types of latex with different polymer fluorination and crosslinking have been synthesized and tested on Prague sandstone. The consolidated stone samples showed significant improvements in mechanical properties, even with diluted latex nanodispersions, while maintaining comparable moisture transport properties. The flexibility of the chemical properties of these novel nanodispersions allows for customized treatments to preserve cultural heritage objects at risk from climate change.
JOURNAL OF CULTURAL HERITAGE
(2023)
Article
Geochemistry & Geophysics
F. Colle, M. Masotta, S. Costa, S. Mollo, P. Landi, A. Pontesilli, S. Peres, L. Mancini
Summary: This study investigates the textural and compositional evolution of clinopyroxene crystals using undercooling experiments. The results show that plagioclase is the dominant mineral phase at low undercooling, while clinopyroxene and spinel co-saturate the melt at higher undercooling. The morphological and geochemical changes in clinopyroxene are controlled by melt supersaturation and relaxation phenomena.
Article
Construction & Building Technology
Simona Raneri, Lucia Mancini, Gabriele Lanzafame, Alexander Peter Kao, Konstantinos Giannoukos, Ravi Chandra Malladi, M. Shiva Kumar, Vincenzo Palleschi, Thirumalini Selvaraj
Summary: The characterisation of lime mortars is crucial for the conservation and repair of ancient buildings. The pore structure, influenced by manufacturing processes, recipes, and technical expedients, plays a significant role in the strength and durability of mortars. Fermenting organic matter in water and adding it to lime mixture has shown promising potential for improving workability and mechanical performance. The use of high-resolution synchrotron radiation computed microtomography (SR-mu-CT) proves to be an effective tool for studying the contribution of organically fermented water in lime mortars and understanding the impact on pore structure and mechanical properties.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Crystallography
Alberto Viani, Lucie Zarybnicka, Radek Sevcik, Petra Macova, Jana Machotova
Summary: The mechanisms of how EDTA and NTA sodium salts control the precipitation of struvite-K from solution have been investigated. These additives influence the precipitation process by extending the induction time, reducing the crystallization rate, and decreasing the amount of reaction product.
JOURNAL OF CRYSTAL GROWTH
(2023)
