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Archaeometry and cultural heritage have lately taken advantage of developments in scientific techniques, offering valuable information to archaeology, art history, and conservation science, involving both instrumental and non-instrumental approaches. Among the possible techniques, X-Ray fluorescence (XRF) has become one of the most applied techniques for cultural heritage elemental material characterization due to its user friendliness; fast, short acquisition times; portability; and most of all, its absolutely non-destructive nature. For this reason, besides being often a first choice for a preliminary overall materials investigation, XRF spectrometers and spectra data handling methods have continuously improved, giving rise to many variations of the same technique; portable spectrometers, micro-probes, and large area scanners are all variations of a very flexible technique. This Special Issue collects papers dealing with most of the analytical techniques related to XRF spectroscopy appropriate for applications to Cultural Heritage materials. We dedicate this Special Issue to the loving memory of Professor Mario Milazzo, a pioneer of Archaeometry in Italy, awarded in 2002 the Gold Medal for Culture by the Italian President. He is remembered as a generous and pleasant man with an insightful, logical mind, who was able to find an appropriate joke for every situation. Many of us following his footsteps in the research field of applied physics for Cultural Heritage still appreciate his vision, teaching, and impact on our lives.

MA-XRF --- conservation studies --- furniture --- Pietro Piffetti --- chinoiserie lacquered cabinet --- SAM --- STEAM --- pigments --- elemental mapping --- painting stratigraphy --- Giotto --- heritage science --- non-invasive analysis --- portable equipment --- pigment identification --- van der Weyden --- Flemish painting --- calco-potassic glass in painting --- INFN-CHNet --- Opificio delle Pietre Dure --- X-ray fluorescence --- synchrotron radiation --- µXRF --- µXANES --- black gloss --- ancient ceramics --- roman mortar --- historic mortar --- mosaic floors --- XRF --- Bracara Augusta --- Stradivari --- musical instrument --- mandolin --- varnish --- coatings --- multi-layered structure --- reflection FT-IR --- spectroscopy --- pXRF --- PCA --- pottery --- EDXRF --- cultural heritage materials --- pigment analysis --- ceramics classification --- metal alloy quantitative analysis --- n/a

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One of the great challenges of contemporary society is establishing a sustainable way of life in harmony with the environment without compromising economic growth and technological development. On the other hand, the increase in the world population has driven per capita consumption, and consequently, the generation of waste. Because of this, new materials are being developed from different types of waste. This Special Issue aims to highlight and share recent scientific findings in the area of “New Environmentally Friendly and Sustainable Materials” manufactured from different material types (polymers, ceramics, metallics, and composites) and urban, industrial, mining and agricultural wastes. Moreover, scientific topics such as improving performance and durability, materials characterization, hybrid materials, foams and porous materials, trends and advances, and mechanical, electrical, magnetic, optical, and thermal properties will also be accepted.

palygorskite --- adsorption --- anionic dye --- cationic dye --- water treatment --- perlite tailings --- aggregate --- alkali–silicate reaction --- ceramic residue --- alkaline activation --- experimental design --- durability tests --- kaolin --- solid residues --- pozzolanic activity --- cement mortar --- carbonation --- poly (lactic acid) --- high-density biopolyethylene --- bioblends --- compatibilization --- scheelite tailings --- sustainable ceramic mass --- red ceramic --- firing parameters

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Cement and lime currently are the most common binders in building materials. However, alternative materials and methods are needed to overcome the functional limitations and environmental footprint of conventional products. This Special Issue dedicated to “New frontiers in cementitious and lime-based materials and composites” gathers selected reviews and experimental articles that showcase the most recent trends in this multidisciplinary field. Authoritative contributions from all around the world provide important insights into all areas of research related to cementitious and lime-based materials and composites, spanning from structural engineering to geotechnics, including materials science and processing technology. This Topical Collection is intended to foster innovation and help researchers and developers to identify new solutions for a more sustainable and functional built environment.

durability --- hardened properties --- green composite --- fresh properties --- recycled concrete aggregates --- natural coarse aggregates --- enzyme-induced calcite precipitation --- microbial-induced calcite precipitation --- geotechnical engineering --- geoenvironmental engineering --- precast concrete wall --- interfacial bonding strength --- joint concrete --- interface processing --- washed rough surface --- roughness --- storage time --- cement mortar --- End-of-Life Tyre --- waste --- surface treatment --- compressive strength --- flexural strength --- workability --- fly ash --- freezing shaft sinking --- shaft lining structure --- uneven pressure --- hybrid fiber-reinforced concrete --- crack --- autogenous self-healing --- curing conditions --- supplementary cementitious materials (SCMs) --- GRC-PC --- integrated wall panels --- composite method --- shrinkage properties --- dissipation energy density --- high-strength concrete --- Weibull distribution --- damage mechanics --- constitutive model --- repeated impact --- ACI 544-2R --- high temperatures --- fire --- residual strength --- lime-cement mortar --- air-entrained agent --- heritage conservation --- reconstruction and restoration of historical buildings --- properties --- mechanical --- electrical resistivity --- ecofriendly ternary concrete --- SCBA --- SF --- coastal cemented soil --- nano silica --- iron tailings --- mechanical properties --- microscopic mechanism --- granite dust --- stabilizer --- particle size --- plasticity --- unconfined compression strength --- cement --- lime --- sustainable materials --- fibre-reinforced composite --- recycled aggregates

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The Tsinghua University–University of Waterloo Joint Research Center for Micro/Nano Energy & Environment Technology (JCMEET) is a platform. It was established on Nov.11, 2017. The Chairperson of University Council of Tsinghua University, Dr. Xu Chen, and the President of the University of Waterloo, Dr. Feridun Hamdullahpur, attended the opening ceremony and unveiled the nameplate for the joint research center on 29th of March, 2018. The research center serves as a platform for researchers at both universities to conduct joint research in the targeted areas, and to meet regularly for information exchange, talent exchange, and knowledge mobilization, especially in the fields of micro/nano, energy, and environmental technologies. The center focuses on three main interests: micro/nano energy technology, micro/nano pollution control technology, and relevant fundamental research. In order to celebrate the first anniversary of the Joint Research Center, we were invited to serve as the Guest Editors of this Special Issue of Materials focusing on the topic of micro/nano-materials for clean energy and environment. It collects research papers from a broad range of topics related to micro/nanostructured materials aimed at future energy resources, low emission energy conversion, energy storage, energy efficiency improvement, air emission control, air monitoring, air cleaning, and many other related applications. This Special Issue provides an opportunity and example for the international community to discuss how to actively address the energy and environment issues that we are facing.

particle size --- nanoplates --- filter paper --- potassium-based adsorbent --- Limestone --- engine filtration --- particle deposition --- airborne nanoparticle --- CaO --- air filtration --- DFT --- nanoparticles --- model --- multiscale model --- building materials --- shale --- adsorption --- passive building systems --- thermal energy storage (TES) --- As2O3 --- nanofibers --- product island --- TGA --- water quality --- oxidation kinetics --- failure --- loading performance --- kinetics --- pressure decay method --- concrete --- airborne dust --- mortar --- flame synthesis --- permeability measurement --- flame stabilizing on a rotating surface (FSRS) --- particle concentration --- submicro-fiber --- rotational speed --- phase change material (PCM) --- PM2.5 --- load modification --- oxygen carrier --- amalgam --- CO2 adsorption --- Karlovitz number --- cellulose nanofiber --- Lyocell fiber --- microscopic characteristics --- sulfation --- spectral blue shift

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This Special Issue focuses on recycled materials to promote pavement sustainability. It covers the use of construction and demolition waste (reclaimed asphalt pavement, recycled concrete aggregate and glass) and industrial waste (plastic and slag). The application of recycled materials concerns bituminous mixtures, concrete mixtures, and non-traditional interlocking blocks or cobbles.

LCA --- road pavement management --- RAP --- multi-recycling --- circular economy --- sustainability --- electric–electronic waste --- interlock floor --- mechanical resistance --- polymers recycling --- materials --- recycling --- plastics --- cobbles --- lightweight traffic --- pedestrian traffic --- concrete additive --- concrete mixture --- plastic waste --- HDPE --- plastic lamellar particles --- self-compacting concrete (SCC) --- high-performance concrete (HPC) --- recycled concrete aggregate (RCA) --- natural aggregate (NA) --- ageing --- bituminous mixture --- mechanical behaviour --- rejuvenator --- hydraulic mortars --- waste materials --- pozzolanic aggregates --- recycled glass --- marble slurry --- tin slag --- mortar --- compressive strength --- fine aggregate --- rough surfaced --- elongated --- concrete --- costs --- carbon footprint --- carbon price --- asphalt --- waste plastic --- visco-elastic properties --- Marshall stability --- rutting resistance --- environmental impact --- n/a --- electric-electronic waste