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The current production and consumption models of building materials are causing severe environmental and social problems worldwide. In this sense, construction and demolition waste (C&DW) are part of the problem and can be part of the solution, particularly in developing countries where the construction industry is growing very rapidly. Although many efforts have been made by stakeholders to increase the use of C&DW in construction materials, articulated efforts are required at global, national, and local scales to develop truly sustainable construction sectors. Therefore, this e-book, which is based on the “Special Issue on Construction and Demolition Waste: Challenges and Opportunities”, is an effort to articulate knowledge on novel and innovative building materials using C&DW and management systems to develop circular economy models (CE) for the construction sector. In this e-book, it is concluded that even though the valorization of C&DW has been developed worldwide, more incentives need to be provided to really convert the local and national construction chains in sustainable sectors, which appropriate the circular economy for production and consumption systems that imrpove, at the least, efficiency in terms of materials, water and energy use.

construction and demolition wastes --- alkali-activated materials --- recycling --- binder --- recycled aggregates --- paving stones --- aggregates --- C&amp --- DW --- sustainability --- mechanical properties --- concrete --- demolition waste --- management --- life cycle assessment --- circular economy --- recycled concrete aggregate --- recycled aggregate concrete --- residual mortar --- reusing --- workability --- compressive strength --- pavement --- green deal --- construction and demolition waste --- quantification --- waste management --- re-use --- material stock analysis --- multi-criteria decision-making --- local authorities --- urban metabolism --- interview --- building --- recycled concrete --- carbonation --- construction and demolition waste (C&DW) --- construction --- municipal solid waste incineration bottom ash --- supplementary cementitious material

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Increases in population, booming economy, rapid urbanization and the rise of living standard have exponentially accelerated waste production. Currently, 2 billion tons per year of municipal solid waste is produced worldwide and about 33% of this amount remains uncollected by different municipalities.. However, the entire waste production process concerns different streams and origins other than municipal solid waste, including industrial, agricultural, construction and demolitions waste; and hazardous, medical and electronic waste. Published papers, as a whole, concern different waste materials such as the recovery of different building materials, the treatment of waste deriving from electrical and electronic equipment, the utilization of stainless-steel slags, agricultural and domestic waste and plastics. In conclusion, the works demonstrate scientific and technological relevance in terms of the topics dealt with, but the problems addressed in this Special Issue proceed beyond the solution that the scientific community is able to propose. In fact, our industrial system, at the end of its cycle of production and consumption, has not developed the capacity to absorb and reuse waste and byproducts. We have not yet managed to adopt a circular model of production capable of preserving resources for present and future generations.

Technology: general issues --- pyrolysis --- biochars --- agricultural waste --- biomass --- recycled aggregates --- self-compacting concrete --- design parameters --- fresh concrete properties --- mix design --- printed circuit boards --- spent mobile phones --- thiourea --- precious metals --- hydrometallurgy --- factorial plans --- plastic waste --- carbon nanotubes --- plastic oil --- fuels --- monomer recovery --- olefins --- reusing of wastes --- secondary lime --- neutralization --- reduce landfill --- acidic wastewater treatment --- sustainable production --- recycling --- lathe waste --- CNC machining --- sustainable development --- mix modification --- workability --- mechanical properties --- thermal properties --- bottom ash --- dry treatment --- incineration --- municipal solid waste --- potential toxic elements --- salts --- sound absorber --- cigarette butts --- sustainable material --- chemical cleaning --- stainless steel slag --- upscale trials --- mixing time --- absorption --- circular economy --- oil spill --- refrigerator --- WEEE --- waste --- value-added materials --- calcium oxide --- eggshell --- incense sticks --- adsorption --- wastewater --- pyrolysis --- biochars --- agricultural waste --- biomass --- recycled aggregates --- self-compacting concrete --- design parameters --- fresh concrete properties --- mix design --- printed circuit boards --- spent mobile phones --- thiourea --- precious metals --- hydrometallurgy --- factorial plans --- plastic waste --- carbon nanotubes --- plastic oil --- fuels --- monomer recovery --- olefins --- reusing of wastes --- secondary lime --- neutralization --- reduce landfill --- acidic wastewater treatment --- sustainable production --- recycling --- lathe waste --- CNC machining --- sustainable development --- mix modification --- workability --- mechanical properties --- thermal properties --- bottom ash --- dry treatment --- incineration --- municipal solid waste --- potential toxic elements --- salts --- sound absorber --- cigarette butts --- sustainable material --- chemical cleaning --- stainless steel slag --- upscale trials --- mixing time --- absorption --- circular economy --- oil spill --- refrigerator --- WEEE --- waste --- value-added materials --- calcium oxide --- eggshell --- incense sticks --- adsorption --- wastewater

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The aggregates used in construction are the natural resource consumed the most in the world after air and water. Due to overexploitation, all environmental laws reward the use of recycled materials to guarantee the reduction of consumption of natural aggregates. The use of reclaimed aggregates, reused aggregates, and recycled aggregates increases sustainability in construction activities. Today, they are strategic materials in the manufacturing of green concrete and mortars and as road construction eco-efficient materials. In addition, the use of recycled aggregates from industrial or mining byproducts presents great potential in construction activities as recycled aggregates and/or supplementary cementitious materials. This Special Issue is open to new experiences in construction materials and/or works made with recycled aggregates.

Research & information: general --- steel reinforced concrete --- polarization --- coal bottom ash --- coal fly ash --- waste --- aggregates --- fines processing --- porosity --- recycled aggregates --- permeable concrete --- interfacial transition zone --- image analysis --- porosimetry mercury intrusion --- lime treatment --- modified Proctor --- CBR --- subbase --- road construction --- concrete --- slag --- valorisation --- cement --- circular economy --- statistical analysis --- estimation --- permeability --- constant head method --- estimation coefficient of permeability --- recycled concrete aggregate --- recycled aggregate --- polyacrylonitrile microfibers --- electrospinning --- durability --- carbonation --- 3D BFEM --- recycled aggregate concrete --- numerical simulation --- failure pattern --- cathode ray tube glass --- civil infrastructures --- cement-treated materials --- self-compacting concrete --- coarse recycled aggregate --- sustainable concrete --- construction and demolition waste management plant --- mercury intrusion porosimetry --- SEM observation --- new paste --- compressive strength --- construction and demolition waste --- recycled fine aggregate --- mortars --- sustainable construction --- mining waste --- ultra-high performance fibres reinforced concrete --- flexural strength --- seaport loading platform --- structural granular layers

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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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This book is dedicated to “High-Performance Eco-Efficient Concrete” and concrete fatigue behavior, more sustainable construction materials, capable of complying with quality standards and current innovation policies, aimed at saving natural resources and reducing global pollution. The development of self-compacting concretes with electric arc furnace slags is a further achievement. In addition, the technical and economic viability of using coarse recycled aggregates from crushed concrete in shotcrete, enhanced quality and reduced on-site construction time are the basic features of prefabricated bridge elements and systems, biomass bottom ash as aluminosilicate precursor and phosphogypsum were discussed. On the other hand, basalt fiber improving the mechanical properties and durability of reactive powder concrete, alkali-activated slag and high-volume fly ash and the potential of phosphogypsum as secondary raw material in construction industry, the effects of fly ash on the diffusion, bonding, and microproperties of chloride penetration in concrete were studied. Increasing amounts of sustainable concretes are being used as society becomes more aware of the environment. Finally, the circular economy as an economic model of production and consumption that involves reusing, repairing, refurbishing, and recycling materials after their service life are presented in this book.

Technology: general issues --- high-frequency fatigue test --- recycled aggregate --- recycled aggregate concrete --- fatigue --- Locati test --- electric arc furnace slags --- mechanical properties --- durability --- self-compacting concrete --- high-performance concrete --- EAFS --- cupola slag --- electric arc furnace slag --- shotcrete --- deep tunnels --- convergence-confinement method --- coarse recycled concrete aggregate --- dry-mix process --- prefabricated --- bridge deck --- prestressed --- UHPC --- sustainable --- biomass bottom ash --- phosphogypsum --- alkali activated fine-grained concrete --- reactive powder concrete --- basalt fiber --- chloride-salt corrosion --- freeze-thaw durability --- alkali-activated concrete --- shrinkage --- cracking --- internal curing --- metakaolin --- ternary binder --- high performance --- strength --- foam --- lightweight material --- thermal conductivity --- fly ash --- carbon dioxide emission --- chloride diffusion --- binding capacity of chlorine --- HVFA --- RAC --- sustainable building --- reinforced concrete --- corrosion of concrete --- fiber-reinforced --- natural fibers --- bamboo --- sustainable mortar --- mechanical characterization --- by-products --- toughness --- recycled concrete --- low clinker cement --- precast --- physical properties --- New Jersey barriers --- recycled aggregates --- recycled mortar --- construction and demolition waste --- decontaminating --- photocatalysis --- glass powder --- green cements --- slag-pozzolanic cement --- CEM V --- tunnel spoil recycling --- high durability --- high-frequency fatigue test --- recycled aggregate --- recycled aggregate concrete --- fatigue --- Locati test --- electric arc furnace slags --- mechanical properties --- durability --- self-compacting concrete --- high-performance concrete --- EAFS --- cupola slag --- electric arc furnace slag --- shotcrete --- deep tunnels --- convergence-confinement method --- coarse recycled concrete aggregate --- dry-mix process --- prefabricated --- bridge deck --- prestressed --- UHPC --- sustainable --- biomass bottom ash --- phosphogypsum --- alkali activated fine-grained concrete --- reactive powder concrete --- basalt fiber --- chloride-salt corrosion --- freeze-thaw durability --- alkali-activated concrete --- shrinkage --- cracking --- internal curing --- metakaolin --- ternary binder --- high performance --- strength --- foam --- lightweight material --- thermal conductivity --- fly ash --- carbon dioxide emission --- chloride diffusion --- binding capacity of chlorine --- HVFA --- RAC --- sustainable building --- reinforced concrete --- corrosion of concrete --- fiber-reinforced --- natural fibers --- bamboo --- sustainable mortar --- mechanical characterization --- by-products --- toughness --- recycled concrete --- low clinker cement --- precast --- physical properties --- New Jersey barriers --- recycled aggregates --- recycled mortar --- construction and demolition waste --- decontaminating --- photocatalysis --- glass powder --- green cements --- slag-pozzolanic cement --- CEM V --- tunnel spoil recycling --- high durability