1,939,669 research outputs found
Durability performance of Green Concrete Incorporating Various Wastes: A Review
The present manuscript stands for the review on the topic of durability attribute of concretes developed by means of green conception with incorporation of a variety of solid industrial waste slag from Ground Granulated Blast Furnace, silica fume, rice husk ash, pulverised fly ash, glass powder waste as well as materials that have undergone recycling in order to know its degree of sustainability. It is highly sought-after to transform these types of waste into a precious adding up materials in place of Ordinary Portland Cement (OPC) in building-up of Green concrete with affordable cost and more essential with a little carbon footprint. How far these Green concept concretes have succeeded in context to its durability characteristic is the principal focus of this review study. There prevails an enormous demand for cost-effective construction materials for offering enough residences and infrastructure networks to get rid of the burgeoning population on the planet earth. The centre of attention is to make researcher, engineer and infrastructure related peoples, as well as construction industry au courant of absorbing the, dissipate materials and their promotion as an acceptable, sustainable and cost-effective building materials. The apposite standards of durability and still excellent researches on the sustainability of this novel Green concept concrete will encourage for espousal of gargantuan construction and infrastructures projects globally. Looking to the above facts, it can be predicted that the said Green technology bestows the impression to have dazzling potential and its approval in construction industries which establishes it as the most promising future edifice material
General form of the full electromagnetic Green function in materials physics
In this article, we present the general form of the full electromagnetic
Green function which is suitable for the application in bulk materials physics.
In particular, we show how the seven adjustable parameter functions of the free
Green function translate into seven corresponding parameter functions of the
full Green function. Furthermore, for both the fundamental response tensor and
the electromagnetic Green function, we discuss the reduction of the Dyson
equation on the four-dimensional Minkowski space to an equivalent,
three-dimensional Cartesian Dyson equation.Comment: consistent with published version in Chin. J. Phys. (2019
The Green tensor of Mindlin's anisotropic first strain gradient elasticity
We derive the Green tensor of Mindlin's anisotropic first strain gradient
elasticity. The Green tensor is valid for arbitrary anisotropic materials, with
up to 21 elastic constants and 171 gradient elastic constants in the general
case of triclinic media. In contrast to its classical counterpart, the Green
tensor is non-singular at the origin, and it converges to the classical tensor
a few characteristic lengths away from the origin. Therefore, the Green tensor
of Mindlin's first strain gradient elasticity can be regarded as a physical
regularization of the classical anisotropic Green tensor. The isotropic Green
tensor and other special cases are recovered as particular instances of the
general anisotropic result. The Green tensor is implemented numerically and
applied to the Kelvin problem with elastic constants determined from
interatomic potentials. Results are compared to molecular statics calculations
carried out with the same potentials
Chemistry on the inside: green chemistry in mesoporous materials
An overview of the rapidly expanding area of tailored mesoporous solids is presented. The synthesis of a wide range of the materials is covered, both inorganically and organically modified. Their applications, in particular those relating to green chemistry, are also highlighted. Finally, potential future directions for these materials are discussed
Towards a sustainable economy? Socio-technical transitions in the green building sector
Making the transition to a green economy is a major policy driver in the UK and other countries. Entrepreneurs are suggested as being at the forefront of this transition and as a driving force for sustainability. These “green entrepreneurs” may represent a new type of entrepreneurial behaviour combining economic, environmental and social aims. In this paper, we present empirical work conducted with green entrepreneurs in the UK green building sector. Buildings have significant impacts on the environment, both in terms of materials and post-construction energy demands. Drawing on sustainability transitions theory, we examine the role of green entrepreneurs in affecting change and suggest that green building niches are less consensual than previously theorised. In theorising green entrepreneurs, we also point to the need to consider them within wider networks of activity rather than as lone actors and the implications this has for policy
The effect of different mulches on yield, fruit quality and strawberry mite in organically grown strawberry
An organic strawberry field experiment was started in 2000 at MTT Ecological Production in Mikkeli to study the influence of mulching materials on the growth, yield, microbiological fruit quality and strawberry mite. Mulching materials are black plastic, flax fibre mat, green mass, barley straw, buckwheat husk as well as pine and birch woodchips
The aesthetic turn in green marketing: Environmental consumer ethics of natural personal care products
Green consumerism is on the rise in America, but its environmental effects are contested. Does green marketing contribute to the greening of American consciousness, or does it encourage corporate greenwashing? This tenuous ethical position means that eco-marketers must carefully frame their environmental products in a way that appeals to consumers with environmental ethics and buyers who consider natural products as well as conventional items. Thus, eco-marketing constructs a complicated ethical identity for the green consumer. Environmentally aware individuals are already guided by their personal ethics. In trying to attract new consumers, environmentally minded businesses attach an aesthetic quality to environmental goods. In an era where environmentalism is increasingly hip, what are the implications for an environmental ethics infused with a sense of aesthetics? This article analyzes the promotional materials of three companies that advertise their environmental consciousness: Burt\u27s Bee\u27s Inc., Tom\u27s of Maine, Inc., and The Body Shop Inc. Responding to an increasing online shopping market, these companies make their promotional and marketing materials available online, and these web-based materials replicate their printed catalogs and indoor advertisements. As part of selling products to consumers based on a set of ideological values, these companies employ two specific discursive strategies to sell their products: they create enhanced notions of beauty by emphasizing the performance of their natural products, and thus infuse green consumerism with a unique environmental aesthetic. They also convey ideas of health through community values, which in turn enhances notions of personal health to include ecological well-being. This article explicates the ethical implications of a personal natural care discourse for eco-marketing strategies, and the significance of a green consumer aesthetic for environmental consciousness in general
Influence of insulating materials on green building rating system results
This paper analyzes the impact of a change in the thermal insulating material on both the energy and environmental performance of a building, evaluated through two different green building assessment methods: Leadership in Energy and Environmental Design (LEED) and Istituto per l'innovazione e Trasparenza degli Appalti e la CompatibilitĂ Ambientale (ITACA). LEED is one of the most qualified rating systems at an international level; it assesses building sustainability thanks to a point-based system where credits are divided into six different categories. One of these is fully related to building materials. The ITACA procedure derives from the international evaluation system Sustainable Building Tool (SBTool), modified according to the Italian context. In the region of Umbria, ITACA certification is composed of 20 technical sheets, which are classified into five macro-areas. The analysis was developed on a residential building located in the central Italy. It was built taking into account the principles of sustainability as far as both structural and technical solutions are concerned. In order to evaluate the influence of thermal insulating material, different configurations of the envelope were considered, replacing the original material (glass wool) with a synthetic one (expanded polystyrene, EPS) and two natural materials (wood fiber and kenaf). The study aims to highlight how the materials characteristics can affect building energy and environmental performance and to point out the different approaches of the analyzed protocols
Linear electromagnetic wave equations in materials
After a short review of microscopic electrodynamics in materials, we
investigate the relation of the microscopic dielectric tensor to the current
response tensor and to the full electromagnetic Green function. Subsequently,
we give a systematic overview of microscopic electromagnetic wave equations in
materials, which can be formulated in terms of the microscopic dielectric
tensor.Comment: consistent with published version in Phot. Nano. Fund. Appl. (2017
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