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An increasing number of people live in cities. In recent decades, this, combined with rural abandonment and landscape polarisation, has resulted in high land ownership concentrations and agricultural intensification. This, in turn, has resulted in a significant decrease in the resilience of agriculture and overall food systems and threatens the maintenance of traditional indigenous and peasant farming. Therefore, there is an urgent need to reconnect society with the sustainable use of agroecosystems by fostering resilient social–ecological systems, emphasising the links between the functioning of natural systems and human well-being, and stressing the benefits that people derive from them. This Special Issue aims to highlight impactful research and commentaries that focus on attempts to connect people with nature for the promotion of sustainable agricultural transitions. This Issue embraces inter- and trans-disciplinary studies from multiple disciplines (e.g., agricultural sciences, environmental sciences, geography, economy, and sociology), as well as those incorporating other knowledge systems (e.g., local and indigenous) in the co-construction of knowledge for sustainable agriculture, including studies in rural areas (e.g., GIAHS or HNV farmland) and initiatives that address urban–rural relationships or those developed within metropolitan areas (e.g., community-supported agriculture, food hubs, domestic gardens, multifunctional agriculture, and farmers´ or consumers´ cooperatives) and studies assessing the societal and ecological impacts of those initiatives.

Research & information: general --- community supported agriculture --- alternative food networks --- spatial proximity --- relational proximity --- cross-national case study --- sustainable agriculture --- rural-urban interaction --- agroecology --- youth --- human-nature connectedness --- sustainability transitions --- depopulation --- ecological agriculture --- water conservation --- double-hurdle model --- interpretative structural modeling --- adoptions --- threatened plant --- agriculture --- Spain --- land use --- conservation --- human-nature reconnection --- cultural landscapes --- drivers of change --- landscape planning --- landscape stewardship --- mixed methods --- participatory governance --- rural abandonment --- stakeholder inclusion --- urban growth --- participatory mapping --- ecosystem services --- demand --- PGIS --- agricultural landscapes --- human nature connectedness --- agricultural innovations --- multi-level perspective --- agricultural knowledge and innovation systems (AKIS) --- conservative agriculture practices --- knowledge co-production --- mediterranean horticulture --- integrated pest management --- greenhouses --- soil health --- biological control --- pond naturalisation --- collective action --- socio-ecological systems --- sustainable agricultural transition --- consumers/citizens --- sustainable consumption --- innovative business models --- alternative agri-food networks (AAFNs) --- human–nature connectedness (HNC) --- multi-level perspective (MLP) --- community-supported agriculture (CSA) --- cooperatives --- food systems governance --- public policy --- inclusive multilateralism --- rights-based approach --- biodiversity --- climate change --- nature --- foodshed archipelago --- proximity food supply chains --- spatial signature --- city-region --- food self-sufficiency --- regional food security --- agricultural diversification --- food planning --- regional food system --- food policy --- socioecological systems --- local identity --- world heritage site --- n/a --- human-nature connectedness (HNC)

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The innovations in construction materials that have been made due to the development of different varieties of concrete have led to innovations in structural applications and design. This Special Issue mainly focuses on state-of-the-art research progress in high-performance concrete, including the effect and characteristics of fibers on the properties of high-performance concrete, the CO2 curing efficiency of high-performance cement composites, and the effect of nano materials when used in ultra-high-performance concrete. This Special Issue also contains two comprehensive review articles covering the following topics: the role of supplementary cementitious materials in ultra-high-performance concrete and recent progress in nanomaterials in cement-based materials. Readers working towards conducting research on innovative construction materials will be exposed to findings related to this topic in this Special Issue.

Technology: general issues --- History of engineering & technology --- ultrahigh-performance concrete --- nanosilica --- dynamic light scattering --- zeta potential --- pore solution --- alkali-activator --- GGBFS --- Na2O content --- Ms (SiO2/Na2O) --- workability --- setting time --- steel fiber --- fiber content --- aspect ratio --- toughness index --- high-strength concrete --- fibers --- smart materials --- fiber/matrix bond --- physical properties --- heat treatment --- alkali-activated material --- calcium sulfoaluminate-based expansive additive --- concrete shrinkage --- modulus of elasticity --- shrinkage stress --- SIFRCC --- fiber volume fraction --- direct tensile strength --- energy absorption capacity --- direct tensile test --- carbon nanotubes --- cement-based materials --- concrete infrastructure --- graphene --- graphene oxide --- mechanical strength --- nanomaterials --- nano-Al2O3 --- nano-Fe2O3 --- nano-SiO2 --- nano-TiO2 --- smart infrastructure --- slurry-infiltrated fiber-reinforced cementitious composite --- high-performance fiber-reinforced cementitious composite --- compressive stress --- stress-strain relationship --- filling slurry matrix --- bio-slime --- sulfate attack --- chloride attack --- service life --- multi-layer diffusion --- repair --- concrete --- dynamic compression --- Split Hopkinson Pressure Bars (SPHB) --- brittle materials --- simulation --- calcined zeolite sand --- ultra-high-performance concrete --- pre-wetted --- autogenous shrinkage --- internal curing --- reactive powder concrete --- strength --- basalt fibers --- abrasion --- porosity --- microscopic image processing --- X-ray CT analysis --- porous cementitious materials --- 3D tomographic image --- CO2 curing --- size effect --- colloidal silica --- cement-based material --- casting method --- ultra-high performance fiber-reinforced concrete --- densified silica fume --- agglomeration --- pozzolanic reaction --- densification --- alternative alkali-activated material --- ground granulated blast-furnace slag --- strength development --- CSA expansive additive --- ultrasonic pulse velocity --- temperature --- high performance concrete (HPC) --- C-shape magnetic probe test --- fibre orientation angle --- flexural test --- attenuation factor --- ultra-high-performance steel fiber-reinforced concrete --- multiscale finite element modeling --- multi-point constraint --- multi-scale interface connection --- concrete damage plasticity model --- ABAQUS --- ultra high-performance concrete (UHPC) --- supplementary cementitious materials (SCMs) --- sustainability --- compressive strength --- flowability --- shrinkage --- railway sleeper --- static bending test --- numerical simulation --- structural performance --- high performance fiber reinforced concrete (HPFRC) --- polypropylene fiber (PP) --- polyvinyl alcohol fiber (PVA) --- residual flexural strength --- splitting tensile strength

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• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

The innovations in construction materials that have been made due to the development of different varieties of concrete have led to innovations in structural applications and design. This Special Issue mainly focuses on state-of-the-art research progress in high-performance concrete, including the effect and characteristics of fibers on the properties of high-performance concrete, the CO2 curing efficiency of high-performance cement composites, and the effect of nano materials when used in ultra-high-performance concrete. This Special Issue also contains two comprehensive review articles covering the following topics: the role of supplementary cementitious materials in ultra-high-performance concrete and recent progress in nanomaterials in cement-based materials. Readers working towards conducting research on innovative construction materials will be exposed to findings related to this topic in this Special Issue.

ultrahigh-performance concrete --- nanosilica --- dynamic light scattering --- zeta potential --- pore solution --- alkali-activator --- GGBFS --- Na2O content --- Ms (SiO2/Na2O) --- workability --- setting time --- steel fiber --- fiber content --- aspect ratio --- toughness index --- high-strength concrete --- fibers --- smart materials --- fiber/matrix bond --- physical properties --- heat treatment --- alkali-activated material --- calcium sulfoaluminate-based expansive additive --- concrete shrinkage --- modulus of elasticity --- shrinkage stress --- SIFRCC --- fiber volume fraction --- direct tensile strength --- energy absorption capacity --- direct tensile test --- carbon nanotubes --- cement-based materials --- concrete infrastructure --- graphene --- graphene oxide --- mechanical strength --- nanomaterials --- nano-Al2O3 --- nano-Fe2O3 --- nano-SiO2 --- nano-TiO2 --- smart infrastructure --- slurry-infiltrated fiber-reinforced cementitious composite --- high-performance fiber-reinforced cementitious composite --- compressive stress --- stress-strain relationship --- filling slurry matrix --- bio-slime --- sulfate attack --- chloride attack --- service life --- multi-layer diffusion --- repair --- concrete --- dynamic compression --- Split Hopkinson Pressure Bars (SPHB) --- brittle materials --- simulation --- calcined zeolite sand --- ultra-high-performance concrete --- pre-wetted --- autogenous shrinkage --- internal curing --- reactive powder concrete --- strength --- basalt fibers --- abrasion --- porosity --- microscopic image processing --- X-ray CT analysis --- porous cementitious materials --- 3D tomographic image --- CO2 curing --- size effect --- colloidal silica --- cement-based material --- casting method --- ultra-high performance fiber-reinforced concrete --- densified silica fume --- agglomeration --- pozzolanic reaction --- densification --- alternative alkali-activated material --- ground granulated blast-furnace slag --- strength development --- CSA expansive additive --- ultrasonic pulse velocity --- temperature --- high performance concrete (HPC) --- C-shape magnetic probe test --- fibre orientation angle --- flexural test --- attenuation factor --- ultra-high-performance steel fiber-reinforced concrete --- multiscale finite element modeling --- multi-point constraint --- multi-scale interface connection --- concrete damage plasticity model --- ABAQUS --- ultra high-performance concrete (UHPC) --- supplementary cementitious materials (SCMs) --- sustainability --- compressive strength --- flowability --- shrinkage --- railway sleeper --- static bending test --- numerical simulation --- structural performance --- high performance fiber reinforced concrete (HPFRC) --- polypropylene fiber (PP) --- polyvinyl alcohol fiber (PVA) --- residual flexural strength --- splitting tensile strength