Article
Environmental Sciences
Johanna Menningen, Enrico Sassoni, Robert Sobott, Siegfried Siegesmund
Summary: This study evaluated the consolidating effectiveness and thermal behavior of different consolidants on marble samples subjected to artificial weathering, finding that treatments with ethyl silicate and acrylic total impregnation method significantly improved cohesion. Additionally, Paraloid B72 and ammonium phosphate treatments had their own effects on marble, with Paraloid B72 causing fabric collapse and ammonium phosphate leading to improved cohesion and reduced residual strain.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Construction & Building Technology
B. Sena da Fonseca, A. P. Ferreira Pinto, A. Rodrigues, S. Picarra, C. Santos, M. F. Montemor
Summary: The study found that the improvement of stone cohesion by partially condensed alkoxysilane-based consolidants is primarily affected by the catalytic route and pore size distribution of the stone, with the mineralogical composition of the substrates playing a secondary role.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Ceramics
A. Rodrigues, B. Sena da Fonseca, A. P. Ferreira Pinto, S. Picarra, M. F. Montemor
Summary: This study prepared novel composite materials for the repair of damaged stone in built heritage using nano-sized hydroxyapatite and tetraethoxysilane. The composite materials showed superior potential compared to reference materials.
CERAMICS INTERNATIONAL
(2022)
Article
Archaeology
B. Sena da Fonseca, A. P. Ferreira Pinto, A. Rodrigues, M. Rucha, M. F. Montemor
Summary: This work investigates and compares the ability of novel products to act as consolidants for carbonate stones. The study finds that novel consolidants based on alkoxysilanes and ammonium phosphate can penetrate deeply and have initial efficacy on porous limestone and marble in granular disintegration.
JOURNAL OF CULTURAL HERITAGE
(2022)
Article
Chemistry, Analytical
Elena Possenti, Chiara Colombo, Marco Realini, Cai Li Song, Sergei G. Kazarian
Summary: This study utilized novel applications of ATR-FTIR spectroscopy and macro ATR-FTIR spectroscopic imaging to analyze the time-resolved, chemical, and spatial aspects of inorganic treatments for stone conservation occurring in water-based solutions. The research showed that different treatments led to the formation of new crystalline phases, with subsequent post-treatment rinsing affecting the final composition of reaction phases. This study demonstrates the feasibility and potential of using advanced ATR-FTIR spectroscopic approaches to investigate conservation treatments and offers new analytical tools for conservation decision-making in pilot worksites.
ANALYTICAL CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Yevgeniy Samarkin, Abduljamiu Olalekan Amao, Murtada Saleh Aljawad, Mostafa Borji, Norman Scott, Murtadha J. AlTammar, Khalid M. Alruwaili
Summary: This study aims to assess the feasibility of Diammonium Hydrogen Phosphate (DAP) as a chemical for strengthening rocks. The results showed that DAP effectively improves the mechanical strength of chalk rock, making it a promising consolidation agent in hydrocarbon reservoirs.
SCIENTIFIC REPORTS
(2023)
Article
Polymer Science
Marzia La Rocca, Alessia Rinaldi, Giovanna Bruni, Valeria Friuli, Lauretta Maggi, Marcella Bini
Summary: This paper focuses on the development of new hybrid materials, Hydroxypapatite@Furosemide, which have shown improved dissolution rates and solubility compared to the drug alone. The hybrids formation was confirmed through various measurements and spectroscopy techniques. The substitution of Sr on Ca sites in hydroxyapatite has also been shown to increase its surface area and pore volume, indicating a high drug loading capacity.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Humanities, Multidisciplinary
Nina Owczarek, Anna O'Neill, Molly Gleeson, Jessica Betz Abel, Julia Commander
Summary: The Penn Museum holds many monumental architectural elements from the Palace Complex of Merenptah. These limestone pieces exhibit condition issues, such as powdering, flaking, and cracking. Methods and materials were investigated to strengthen and stabilize the stone for reinstallation in the Museum's renovated Egyptian galleries. CaLoSil E5 and M-3P were found to have better performance in improving strength and reducing powdering.
JOURNAL OF THE AMERICAN INSTITUTE FOR CONSERVATION
(2023)
Article
Chemistry, Multidisciplinary
M. Carla Aragoni, Laura Giacopetti, Massimiliano Arca, Gianfranco Carcangiu, Stefano Columbu, Domingo Gimeno, Francesco Isaia, Vito Lippolis, Paola Meloni, Antonia Navarro Ezquerra, Enrico Podda, Jordi Rius, Oriol Vallcorba, Anna Pintus
Summary: The study found that the ammonium salt of monoethyloxalate (AmEtOx) can serve as a precursor for protecting carbonate stone substrates, leading to reduced porosity and enhanced cohesion of the treated stone samples. Experimental and theoretical calculations confirmed the formation of microcrystalline phases on the stone surfaces, contributing to the overall preservation of the stone substrates.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Monika Rojewska, Katarzyna Adamska, Justyna Kurnatowska, Andrzej Miklaszewski, Aneta Bartkowska, Krystyna Prochaska, Mohd Sajid Ali, Abbul Bashar Khan, Javed Masood Khan
Summary: This study synthesized thin films containing magnesium-doped hydroxyapatite using the Langmuir monolayer technique and characterized them using BAM microscopy. The presence of phospholipid molecules improved the biocompatibility of the films, while the addition of modified hydroxyapatite particles enhanced antibacterial properties and osteogenesis processes.
Proceedings Paper
Materials Science, Multidisciplinary
D. S. Ramamurthi, S. Judes Sujatha, Ravikant Talluri, U. Muthuraman
Summary: This study investigates the influence of various consolidation materials on the mechanical and micro-structural behavior of feeble Gypsum mortar. The results show that these consolidation products can significantly improve the mechanical and water resistance properties of Gypsum mortar, enhancing its cohesion and stability, and providing a promising technique for the renovation of historic buildings and future artistic constructions.
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Chemistry, Multidisciplinary
Mahmoud Abd El Hafez Adam, Shaymaa El-Sayed El- Shafey, Sahar Ramadan Mohamed
Summary: This study evaluated the effectiveness of nanohydroxyapatite as a consolidating material for limestone monuments. The nanocomposite of nanohydroxyapatite and polymer was found to effectively fill pores and provide good consolidation for the archaeological limestone samples. The use of nanohydroxyapatite/polymer nanocomposite significantly improved the physical and mechanical properties of the treated limestone samples.
EGYPTIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Analytical
Alessandra Botteon, Wang-Hyo Kim, Chiara Colombo, Marco Realini, Chiara Castiglioni, Pavel Matousek, Byung-Man Kim, Tae-Hyuk Kwon, Claudia Conti
Summary: This study demonstrates the ability to monitor the dye depth profile within the light active layer of dye-sensitized solar cells using a non-destructive/non-invasive Raman method, micro-spatially offset Raman spectroscopy (micro-SORS). The results show that micro-SORS can accurately discriminate between homogeneous and inhomogeneous dye depth profiles, and its analysis is reliable compared to destructive time-of-flight secondary ion mass spectrometry measurements.
ANALYTICAL CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Marine Cotte, Victor Gonzalez, Frederik Vanmeert, Letizia Monico, Catherine Dejoie, Manfred Burghammer, Loic Huder, Wout de Nolf, Stuart Fisher, Ida Fazlic, Christelle Chauffeton, Gilles Wallez, Nuria Jimenez, Francesc Albert-Tortosa, Nati Salvado, Elena Possenti, Chiara Colombo, Marta Ghirardello, Daniela Comelli, Ermanno Avranovich Clerici, Riccardo Vivani, Aldo Romani, Claudio Costantino, Koen Janssens, Yoko Taniguchi, Joanne McCarthy, Harald Reichert, Jean Susini
Summary: The European Synchrotron Radiation Facility has upgraded its light source, leading to improved beamline performances. To enhance data acquisition speed, new access modes have been developed. One of these modes guarantees beamtime for 10 European institutes, facilitating applications to cultural heritage.
Article
Spectroscopy
Chiara Castiglioni, Alessandra Botteon, Claudia Conti, Matteo Tommasini, Pavel Matousek
Summary: This study introduces an analytical physical description of micro-spatially offset Raman spectroscopy (micro-SORS) experiments in turbid samples and highlights its use for studying the penetration depth of chemical species into a matrix. The study demonstrates the relationship between the Raman intensity ratio and the concentration profiles of the analytes using a physical model and Monte Carlo simulation. The obtained formulas provide insights for interpreting micro-SORS data and comparing different samples.
JOURNAL OF RAMAN SPECTROSCOPY
(2022)
Article
Chemistry, Multidisciplinary
Andrea Diaz-Cortes, Gabriela Graziani, Marco Boi, Lucia Lopez-Polin, Enrico Sassoni
Summary: This study investigated the use of DAP aqueous solutions for consolidating archaeological bones and explored ways to improve its performance. Results showed that a 3 M DAP solution effectively improved the bone surface properties and resistance to material loss by peeling off. While Paraloid B72, a commonly used commercial consolidant, was able to penetrate deeper and decrease material loss more effectively, it formed a layer of acrylic resin on the bone surface.
Article
Multidisciplinary Sciences
Elena Possenti, Claudia Conti, G. Diego Gatta, Nicoletta Marinoni, Marco Merlini, Marco Realini, Gavin B. M. Vaughan, Chiara Colombo
Summary: This paper proposes the use of synchrotron X-ray diffraction computed tomography (XRDCT) to non-destructively study diammonium hydrogen phosphate (DAP) consolidating treatments for stone conservation. The study explores the mineralogical composition and localization of crystalline phases formed in a complex mixture, highlighting the coexistence of hydroxyapatite and octacalcium phosphate. The research demonstrates the feasibility and high potential of XRDCT to investigate conservation treatments with CH stone materials.
Article
Materials Science, Ceramics
Greta Ugolotti, Enrico Sassoni
Summary: This study explored different strategies to improve the consolidating efficacy of diammonium hydrogen phosphate (DAP) solution, including increasing pH or adding organic solvents. The results showed that apatite phases were formed as a result of all treatments, except when undesired ammonium calcium phosphate hydrate was formed at pH 12. Higher concentration DAP solutions provided greater strengthening ability.
CERAMICS INTERNATIONAL
(2023)
Article
Infectious Diseases
Daniele Ghezzi, Enrico Sassoni, Marco Boi, Matteo Montesissa, Nicola Baldini, Gabriela Graziani, Martina Cappelletti
Summary: Copper coatings deposited through Ionized Jet Deposition (IJD) on the Calgary Biofilm Device (CBD) demonstrated broad-spectrum antibacterial and antibiofilm activity, indicating their potential application for functionalizing biomedical devices.
Article
Materials Science, Multidisciplinary
Valeria Diella, Marco Cantaluppi, Rosangela Bocchio, Elena Possenti, Ilaria Adamo, Giancarlo Della Ventura, Lucia Mancini, Nicoletta Marinoni
Summary: In this study, natural and Zachery-treated turquoise samples from the Kingman mine in Arizona, USA, were analyzed using various methods. The results revealed distinctive chemical-mineralogical and microstructural features in the treated samples, including higher specific gravity, lower porosity, uneven concentrations of Cu, K, and Na, the presence of tenorite and reaction edges. The hypothesis suggests that the Zachery treatment leads to the formation of a new turquoise-like phase that differs chemically and microstructurally from the natural one.
PHYSICS AND CHEMISTRY OF MINERALS
(2023)
Article
Chemistry, Multidisciplinary
Matteo Montesissa, Giorgia Borciani, Katia Rubini, Francesco Valle, Marco Boi, Nicola Baldini, Elisa Boanini, Gabriela Graziani
Summary: Calcium phosphate-based coatings have been extensively studied in orthopedics and dentistry for their similar composition to bone minerals and their ability to promote osseointegration. This study compared different calcium phosphate-based nanostructured coatings obtained from hydroxyapatite, brushite, and beta-tricalcium phosphate precursors. The coatings were systematically evaluated for their composition, morphology, physical and mechanical properties, dissolution, and in vitro behavior. High-temperature depositions were also investigated to further modify the mechanical properties and stability of the coatings. The findings demonstrate that different phosphates can be deposited with good composition fidelity and that brushite exhibits the highest suitability for promoting cell viability.
Article
Construction & Building Technology
Helene Pasco, Sonia Naidu, Barbara Lothenbach, Enrico Sassoni
Summary: This study investigates the ability of aqueous phosphate solutions to enhance the surface properties of cement pastes through the formation of low-solubility calcium phosphate (CaP) phases. Diammonium hydrogen phosphate (DAP), dipotassium hydrogen phosphate (DPP), and disodium hydrogen phosphate (DSP) were studied using thermodynamic modeling and experiments. The best results were obtained with a 1 M DPP + 1 mM CaCl2 solution applied to cement hydrated for 7 days, resulting in a CaP coating that significantly improved the resistance to abrasion, surface indentation, and staining of the cement pastes. Preliminary durability tests confirmed that no efflorescence occurred, indicating the environmental sustainability of the treatment.
CEMENT & CONCRETE COMPOSITES
(2023)
Proceedings Paper
Construction & Building Technology
Alessandro Dal Pozzo, Giulia Masi, Alessandro Tugnoli, Enrico Sassoni
Summary: The formulation of stone consolidants for the restoration of weathered carbonate substrates is a key area of research in conservation science. This study compared the environmental impacts of three consolidants (a novel phosphate-based product, nanolimes, and acrylic resin) through a life cycle assessment. The results showed that the phosphate-based treatment had a lower environmental footprint compared to the commercial alternatives. The analysis also identified the main contributors to the environmental impact for each product.
PROCEEDINGS OF THE 75TH RILEM ANNUAL WEEK 2021
(2023)
Proceedings Paper
Construction & Building Technology
Giulia Masi, Enrico Sassoni
Summary: This study evaluated the performance of four different consolidants on porous limestone, aiming to find the optimal product consumption for each consolidant. The results showed that nanolimes and acrylic resin had inadequate consolidation and resistance to ageing due to insufficient penetration depth. Increasing the consumption of ethyl silicate led to improved mechanical effectiveness but caused color change and poor resistance to freezing-thawing cycles. Ammonium phosphate achieved significant consolidation even with the lowest product consumption and had better compatibility and freezing-thawing resistance than other consolidants.
PROCEEDINGS OF THE 75TH RILEM ANNUAL WEEK 2021
(2023)
Proceedings Paper
Construction & Building Technology
Enrico Sassoni
Summary: This paper summarizes the research results in the past 10 years on the use of ammonium phosphate solutions for conservation of heritage stones and mortars. The most commonly used formulations and various functionalities of the treatment are discussed. The treatment's compatibility, durability, and environmental sustainability are evaluated. Ammonium phosphate is considered one of the most promising inorganic treatments for heritage materials conservation based on laboratory and field studies.
PROCEEDINGS OF THE 75TH RILEM ANNUAL WEEK 2021
(2023)
Article
Chemistry, Analytical
Sara Calandra, Claudia Conti, Irene Centauro, Emma Cantisani
Summary: We demonstrate a non-destructive and effective method to distinguish between geogenic and anthropogenic calcite for the first time. Geogenic calcite comes from natural sedimentary and metamorphic rocks, while anthropogenic calcite is artificially formed through the carbonation process in mortars and plaster lime binders. This distinction is crucial in several fields and has been addressed in this paper using high-resolution micro-Raman spectroscopy combined with data mining and machine learning methods.
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)
