Environmental Waste Management in Constructions

Kralj, Davorin

doi:10.5772/10099

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…The overall goals of sustainable development are to meet human needs and improve quality of life; to live within the earth's ecological carrying capacity and maintain or enhance its natural capital; and to protect future generations from reduced quality of life [1]. Companies prove their respect towards the capacity of interior sources and the surroundings of the business system not only from the viewpoint of economy and quantity but first of all from the viewpoint of sustainability.…”

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confidence: 99%

Sustainable Teaching and Innovation for Zero Waste

Zhu

Kralj²

2011

AMR

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The contribution focuses on teaching and innovation for Sustainable development. Teaching the theory on the basis of the practical experiences envisages sustainable development planning as a process of continuous improvement. The article shows an optimization of recycling of concrete from lightweight aggregates containing expanded glass and hard rubber. The purpose of this work was to produce the new combination using rest, construction waste of concrete from lightweight aggregates and hard rubber and new raw components of concrete from lightweight aggregates, as key reactive material.

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confidence: 99%

Sustainable Teaching and Innovation for Zero Waste

Zhu

Kralj²

2011

AMR

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“…We focused on identifying opportunities to improve the environmental aspects of LWC and the next step was to recycle crushed construction waste of concrete from lightweight aggregates and fresh concrete from lightweight aggregates as a binding. Recycling was the next activity at normal room conditions: 1) Rest construction waste was assembled from LWC with aggregates containing expanded glass and hard PU, 2) Then crumbled into small pieces, 3) The crumbled construction waste of concrete from LWC with aggregates containing expanded glass and hard PU(mechanical reprocessing) was taken as a raw input material in the processing line to the standard mould, 4) Volume of standard mould was charged and used for preparation of concrete specimens for compression test with "new" raw material, 5) Binding reaction occurred between new raw materials of fresh LWC with aggregates containing expanded glass and rest (waste) material of LWC with aggregates containing expanded glass and hard PU, 6) Binding process or the binding reaction refers to hydration of cement and 7) Quality control was implemented [7]. A test cube of recycled "new" material from LWC with aggregates containing expanded glass was prepared for studying the characteristics.…”

Section: Methodsmentioning

confidence: 99%

Green Environmental Protection as a Result of Systems Thinking

Kralj¹,

Gashi²,

Kralj³

2013

JOEBM

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Many scholars interested in environmental management discuss it from different aspects; the overwhelming majority of companies are trying to implement environmental management from theoretical point of view into everyday situations. It is important to underscore the fact that environmental management is a concept used every bit as theory as in practice in different aspects from different point of views. The similar case exists in concepts of management, organization and quality; the content of environmental management is dealt with insufficiently examined theory basis and also the interpretation and use in business practice is not systematical and consistent. In our research we propose a model of recycling isolating materials, made of hard polyurethane and lightweight concrete, with aggregates containing expanded glass as an innovative construction material-green lightweight composite. The scope of the aforementioned model is to plan production processes without waste and to improve energy efficiency in buildings. The model proposed solution enables a process alternative to be enhanced in sustainable development. Composites characteristics of density, compressive strength and thermal conductivity are changing in dependency of the type and part of waste as well as the type and part of fresh binding components. Method shows great possibilities for increasing use of construction waste isolating materials from hard polyurethane and lightweight concrete with aggregates containing expanded glass in order to benefit from better use of available capacity of existing construction waste.

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“…The applied mold and core manufacture technology makes a direct impact on the production costs and labor productivity and, consequently, on the profit and profitability; therefore, it is one of the factors shaping the development strategies of the enterprise as a whole [ 14 ]. For this reason, in industrialized countries, cold-hardening mixtures with synthetic resins are attracting more and more attention from the foundry industry [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

The Technology of Using Liquid Glass Mixture Waste for Reducing the Harmful Environmental Impact

et al. 2022

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The spent liquid glass mixture, which is widely used in foundries as a binder after knocking out of moldings, contains pieces of different sizes and strengths, and there is a strong silicate film on the sand grains themselves. The proposed regeneration plants, which provide for the removal of the silicate film by scrubbing, have low productivity and lead to abrasion of the grains themselves. For this reason, the knocked-out mixture is taken to the dump. As a result of the study of the state of the spent liquid glass mixture in the dump, it was found that, in the spent mixture that had lain for 8–10 years, under prolonged exposure to atmospheric precipitation at plus and minus temperatures, part of the silicate film dissolves and almost all monolithic pieces are destroyed. Further use of hydraulic regeneration allows us to reduce the film thickness and thereby reduce the percentage of liquid glass from 5–5.5% to 0.8–1.2%. This made it possible to select the composition of the molding sand for an automatic line, using the AlpHaset-process, which consists of 22–29% of liquid glass mixture from a dump, 65–72% of liquid glass, 5.5% of liquid glass, and a hardener in the amount of 0.55%.

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Environmental Waste Management in Constructions

Cited by 4 publications

References 2 publications

Sustainable Teaching and Innovation for Zero Waste

Sustainable Teaching and Innovation for Zero Waste

Green Environmental Protection as a Result of Systems Thinking

The Technology of Using Liquid Glass Mixture Waste for Reducing the Harmful Environmental Impact

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