Papers by Keyword: Reuse

Abstract: It is increasingly evident that the construction industry must undergo a thorough transformation. Globally, the construction sector is responsible for up to 50% of carbon emissions and approximately 50% of resource consumption. This high resource consumption correlates with substantial waste generation. To reduce the environmental impact of civil engineering, priority should be given to preserving existing structures, even if they require repair or significant retrofitting, or at least reusing their components.. However, practical implementation is challenging, primarily due to the lack of proper assessment of existing structures, which is crucial for making decisions regarding liability. Currently, there are no well-established rules for determining the design life and safety of structures incorporating elements derived from dismantled ones. This paper identifies, based on the report prepared for the European Commission [1], best practices in the construction industry and the most promising measures to reduce its climate impact in the future. From the structural engineer's perspective, these measures would certainly involve substituting carbon-intensive materials with low-carbon alternatives and embracing adaptive, modular, and reversible designs supported by data-driven models. Reuse and disassembly are crucial for circular systems in the construction industry, particularly in designing connections and ensuring the transfer of information about structural elements throughout their lifecycle, including the concept of creating 'smart elements' equipped with Structural Health Monitoring (SHM) systems. The possibilities for implementing the concept of reuse of building structures is also discussed in the paper.

Abstract: Finding an effective framework for the consumption of municipal and construction/demolition wastes has been the main research consideration for decades. For different categories of wastes, there is a need for the development of working systems for cleaner utilization of the materials. This study is focused on the review of composite development using paper waste and pulverized ceramics. The issues discussed comprises; excessive waste production, the building sector’s ecological effects, paper waste availability, and proposed solutions to realizing a sustainable built environment. The study also discussed standard mortar and the various types that exist, lightweight mortar, its nature, intricacies of its production process, and the prior use of waste materials for its manufacture. Paper waste, although not having enough strength as conventional aggregate, but with its filling effect, could fit lightweight mortar production along with other similar aggregates. The study gave an overview of the methodological deficiency found and proposed viable approaches to combat these gaps and further advance sustainable and eco-friendly construction.

Abstract: Civil construction is a sector of extreme impact on the Brazilian economy, both in terms of jobs as well as consumption of raw material and waste generation. Civil construction waste (CCW) represents a large part of the total mass of municipal solid waste in a medium and large city. An alternative to diminish these released wastes is to reuse them. In this work, a study was carried out using CCW both to produce concrete with sand substitution and as a small aggregate for use in mortar. The compression strength of structural concrete and mortar, with total and partial replacement of sand, was analyzed. In addition, the consistency of mortar with the replacing was also studied. The results of the compression test indicate superior quality for concretes (75wt% CCW) and mortar with CCW incorporation. The required amount of water for good workability in the modified mortar is 310 g, against 270 g for the reference mortar.

Abstract: The paper was removed due to copyright misconduct (missing consensus from all co-authors)

Abstract: The paper was removed due to copyright misconduct (missing consensus from all co-authors)

Abstract: In silicon wafer manufacturing for solar cells, the hazardous sawing waste results in serious environmental problems. In this paper, a novel approach for the recycling and reusing of slurry waste is reported. The results show that slurry waste is recycled and reused completely, and composite material of Si₃N₄-Si₂N₂O-SiC is prepared. The residual gas from oxygen enrich gas production is used, which reduced cost effectively. In addition, the reaction is exothermic, which is also energy saving and ensure the production to be continuous without external heat source. The mechanism was also discussed in this paper.

Abstract: The paper describes the project facade4zeroWaste which includes the development, architectural design relevance, grants of patents, results of pre-certification testing’s and the product publication in the time frame from 2009 till 2017. Aim of the research project facade4zeroWaste was the idea of a recyclable facade insulation system that can easily be dismantled after its lifetime and reused thanks to an innovative grip fixing system consisting of mushroom-shaped heads and loops - Grip fixing instead of adhesive. The project won numerous prices and awards like the EQAR - Recycling Prize 2015 or the Innovation Award for Architecture and Building 2017. The project is a contract research project tasked by Sto SE & Co. KGaA, Germany and Sto GesmbH, Austria. The façade system was presented to the public in January 2017 as the product Sto Systain R (R = render: seamless plaster layer surface) on the building fair BAU 2017 in Munich. *

Abstract: The reuse of treated wastewater can reduce the water deficit in Saharan areas, especially in Ghardaia. The M'Zab wastewater treatment plant (WWTP) is designed to treat wastewater by the natural lagoon system, and to reuse the treated water for irrigation of agricultural perimeters in order to contribute to sustainable development efforts in the region. Indeed the present work aims to search for the study of the possibility of reusing treated wastewater of M 'Zab in irrigation, to do this, we established and followed the evolution of the various physical-chemical and bacteriological analysis for two years (2013-2015), to study the effectiveness of biological treatment in the reduction of wastewater pollution, and then compare the results of treated water with national and international standards in the field of 'irrigation. The results showed that the treated water is considered as poor quality water is not usable only for some salt-tolerant species and on well-drained soil and leached, require additional treatments for ensured the quality of this precious resource.

Abstract: The industry of ceramic tiles exploits large amounts of natural resources and produces a lot of solid waste, especially porcelain tiles, a product of this industry that involves high technology fabrication. A previous study showed that, if the calcination conditions are respected (1200°C for 2 hours), it is possible to produce new ceramic tiles from the shards of porcelain tiles generated during construction or demolition. This study uses techniques such as X-Ray Fluorescence, X-Ray Diffraction and Scanning Electronic Microscopy in order to investigate the microstructural phenomena that allow the new materials’ sintering.

Abstract: Fresh water resources have been depleted and polluted globally. Many developed countries have encouraged in using grey water recycling as an alternative water resource. Many developing countries are however very slow to adopt the need for the alternative. Surakarta City is the second largest city in Central Java Province, Indonesia. The city is experiencing in drought and flooding. Rivers and groundwater have been polluted as well. This paper recommended decentralized urban greywater management strategies with two greywater treatment systems i.e. Two-stage and Subsurface constructed wetland systems. The application of the systems could provide householders getting significant water saving, reducing the amount of wastewater entering the existing drainage channels, and improving surface and groundwater quality.