scholarly journals Geogrid mechanical damage caused by recycled construction and demolition waste (RCDW) under in-field cyclic loading

2021 ◽  
Vol 44 (2) ◽  
pp. 1-9
Author(s):  
Kátia Regina Monteiro Barbosa ◽  
Eder Carlos Guedes dos Santos ◽  
Alexandre Duarte Gusmão
Keyword(s):  
Sustainable Development ◽  
Cyclic Loading ◽  
Mechanical Damage ◽  
Construction Method ◽  
The Other ◽  
Construction And Demolition Waste ◽  
Operational Performance ◽  
Project Design ◽  
Demolition Waste ◽  
Unpaved Roads

Despite the advances observed over the last decade, Brazil still suffers from the scarce use of recycled construction and demolition waste (RCDW). On the other hand, most of the roads in the country are unpaved and present low loading support. In this context, the construction of geosynthetic reinforced unpaved roads with RCDW could stimulate the market of recycled materials and increase the performance of these roads. This study aims to evaluate the mechanical damage of two types of geogrids due to in-field cyclic loading of RCDW. The simulation of three scenarios of damage revealed specific reduction factors for each geogrid, which could be easily used in project design. This study reinforces the importance of carrying out investigation of geogrid damage using the specific conditions (material, construction method and loading) of each work. Based on these findings, sustainable development can be implemented using RCDW and provide roads to the society with better operational performance.

scholarly journals 3 Tackling Demolition Waste – An en route to Sustainable Development

2018 ◽  
Vol 8 (1) ◽  
pp. 8
Author(s):  
Nadia Qamar ◽  
Ayesha Alam Khurram
Keyword(s):  
Sustainable Development ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Conditions ◽  
Material Flow ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
Construction And Demolition Waste ◽  
Water Tank ◽  
Demolition Waste

In Pakistan, construction and demolition waste(CDW) is generated in voluminous amount each year. CDW iswidely ill-handled and ultimately fed to landfills causing harm tothe already alarming environmental conditions. In order tosearch for the solution of this drastic matter, a study was done,which is explained in this paper. This paper presents the studydone at a demolition site near Karachi, in Sindh while thedemolition works were being carried out. At the site there wereold barracks which were being demolished. Before the demolitionworks were commenced, the site was surveyed and structuralcomponents of the barracks were counted and their dimensionswere measured. When the demolition was over, the demolishedwaste was calculated which comprised of concrete and masonryrubble, steel round bars, steel doors, steel windows, steel ceiling,steel girders, steel main gate, and plastic water tank. This studyinterpreted that construction and demolition (C&D) works wereprogressing considering the works’ deadline and the clients’requirements but the ecosystem’s ecology and the environmentalhealth were not taken into account. Recommendations are madeto handle CDW properly throughout its lifecycle. Theserecommendations aim to provide technological and logicalsolutions to grip CDW. The recommendations include wastereduction and reusing waste, life cycle assessment and costing,environmental and economic impact, material flow analysis, andadvanced computerized-tools.

scholarly journals Composition of Plastic Fractions in Waste Streams: Toward More Efficient Recycling and Utilization

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 69 ◽  
Author(s):  
Ville Lahtela ◽  
Marko Hyvärinen ◽  
Timo Kärki
Keyword(s):  
Sustainable Development ◽  
Infrared Spectrum ◽  
Near Infrared ◽  
Plastic Material ◽  
Construction And Demolition Waste ◽  
Waste Stream ◽  
Polymer Composition ◽  
Waste Streams ◽  
Demolition Waste ◽  
Global Goal

Reuse of materials is a significant global goal that contributes to sustainable development. Polymer-specific plastic identification from the waste stream is examined in this study to achieve environmentally optimistic reuse of plastic material in secondary applications. Two diverse waste streams, 86.11 kg of construction and demolition waste (CDW) plastic and 57.74 kg of mechanically sorted plastic, were analyzed by using a handheld tool whose identification technology was based on the near-infrared spectrum. The study indicates a significant effect of human and single fraction on manual separation. The polymer composition in the plastic waste stream varied depending on the source, but the most common plastic grades, polypropylene (PP) and polyethylene (PE), were represented in every waste stream. The waste stream also included unidentified and unfavorable wastes, which indicates that identification of the plastic fractions is needed and more studies should be done in this field in the future.

scholarly journals 3 Tackling Demolition Waste – An en route to Sustainable Development

2018 ◽  
Vol 1 (1) ◽  
pp. 8
Author(s):  
Nadia Qamar ◽  
Ayesha Alam Khurram
Keyword(s):  
Sustainable Development ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Conditions ◽  
Material Flow ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
Construction And Demolition Waste ◽  
Water Tank ◽  
Demolition Waste

In Pakistan, construction and demolition waste(CDW) is generated in voluminous amount each year. CDW iswidely ill-handled and ultimately fed to landfills causing harm tothe already alarming environmental conditions. In order tosearch for the solution of this drastic matter, a study was done,which is explained in this paper. This paper presents the studydone at a demolition site near Karachi, in Sindh while thedemolition works were being carried out. At the site there wereold barracks which were being demolished. Before the demolitionworks were commenced, the site was surveyed and structuralcomponents of the barracks were counted and their dimensionswere measured. When the demolition was over, the demolishedwaste was calculated which comprised of concrete and masonryrubble, steel round bars, steel doors, steel windows, steel ceiling,steel girders, steel main gate, and plastic water tank. This studyinterpreted that construction and demolition (C&D) works wereprogressing considering the works’ deadline and the clients’requirements but the ecosystem’s ecology and the environmentalhealth were not taken into account. Recommendations are madeto handle CDW properly throughout its lifecycle. Theserecommendations aim to provide technological and logicalsolutions to grip CDW. The recommendations include wastereduction and reusing waste, life cycle assessment and costing,environmental and economic impact, material flow analysis, andadvanced computerized-tools.

scholarly journals Research On Recycling Of Hardened Mortar From Construction And Demolition Waste

2015 ◽  
Vol 5 (2) ◽  
pp. 81-86
Author(s):  
Irina Smical ◽  
F. Filip-Văcărescu ◽  
G. Danku ◽  
V. Paşca
Keyword(s):  
Sustainable Development ◽  
Compressive Strength ◽  
Circular Economy ◽  
Standard Sample ◽  
Testing Machine ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
The Sustainable Development ◽  
Concrete Production ◽  
Compression Resistance

Abstract The recycling issues related to the construction and demolition (C&D) wastes in the sustainable development and the circular economy context represent a continuous challenge for researchers. This paper reveals the possibility to recycle the hardened mortar recovered from C&D wastes. Thus, the recovered hardened mortar with grains size less than 16 mm was used in the concrete structure. The compression resistance of the final concrete was determined using a Heckert 3000 KN testing machine and the results showed a better compressive strength for the samples with C&D waste content than the standard sample of about 1.19 times. This is a good premise for improving the researches related to C&D waste usage in concrete production.

Prioritizing the effective strategies for construction and demolition waste management using fuzzy IDOCRIW and WASPAS methods

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Maryam Eghbali-Zarch ◽  
Reza Tavakkoli-Moghaddam ◽  
Kazem Dehghan-Sanej ◽  
Amin Kaboli
Keyword(s):  
Decision Making ◽  
Sustainable Development ◽  
Waste Management ◽  
Social Life ◽  
Fuzzy Numbers ◽  
Model Performance ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Content Type ◽  
Effective Strategies

PurposeThe construction industry is a key driver of economic growth. However, the adverse impacts of construction and demolition waste (CDW) resulted from the active construction projects on the economy, environment, public health and social life necessitates an appropriate control and management of this waste stream. Developing and promoting the construction and demolition waste management (CDWM) hierarchy program at the strategic level is essential.Design/methodology/approachThis study aims to propose a hybrid decision model that hybridizes the Integrated Determination of Objective Criteria Weights (IDOCRIW) and weighted aggregated sum product assessment (WASPAS) under a fuzzy environment.FindingsThe proposed method ranks the potential strategic alternatives by the sustainable development criteria to improve the performance of CDWM. As indicated in the results, the fuzzy approach in the decision-making process enables the transformation of linguistic variables into fuzzy numbers that show uncertainty and ambiguity in real-world systems. Moreover, the close correlation between the final ranking of the proposed methodology and the average priority order of the strategic alternatives obtained by five different multi-criteria decision-making (MCDM) methods implies the validity of the model performance.Practical implicationsThis proposed model is an appropriate tool to effectively decide on the development of CDWM from a strategic point of view. It aims to establish an MCDM framework for the evaluation of effective strategies for CDWM according to the indices of sustainable development. Implementing proper operational plans and conducting research in CDWM has the highest priority, and enacting new and more stringent laws, rules and regulations against the production of CDW has secondary priority. This study contributes to the field by optimizing the CDWM by applying the top-priority strategies resulted from the proposed fuzzy hybrid MCDM methodology by the decision-makers or policy-makers to reach the best managerial strategic plan.Originality/valueIn the proposed methodology, the IDOCRIW technique is utilized and updated with the triangular fuzzy numbers for the first time in the literature to derive the weights of sustainable development criteria. The fuzzy WASPAS method is utilized for evaluation and providing a final ranking of the strategic alternatives.

scholarly journals Sustainable Management of Construction and Demolition Waste

2021 ◽  
Vol 9 (12) ◽  
pp. 250-257
Author(s):  
Kaushik Bokarde
Keyword(s):  
Sustainable Development ◽  
Natural Resources ◽  
Construction Industry ◽  
Social Life ◽  
Construction Materials ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Management Plans ◽  
Natural Aggregates ◽  
Mother Earth

Abstract: Construction activity in India has magnified well within the past decade. Likewise, there has conjointly been a proportion to rise within the generation of construction and demolition waste (C&DW). This, alongside the fact that in India the speed of recycling and reuse of C&DW continues to be quite low and has engendered a heavy environmental downside and a motivation to develop ways and management plans to resolve it. Almost every time the construction and demolition waste end up settling in landfills disrupting the environmental, economic, and social life cycle. Its composition has a significant potential to reuse or recycle C&DW, and thereby, contribute to enhancing the sustainability of construction, however, practical procedures don’t seem to be widely known or practiced within the construction industry. Elements of construction and demolition waste generally embrace concrete, asphalt, wood, metals, roofing, paper, plastic, drywall, and glass. Sustainable development defines as accomplishing the current requirements without compromising the ability of future generations to satisfy their own needs and can be thought of as one of the concrete solutions to resolve construction and demolition waste downside. Sustainable development in construction can facilitate plenty to cut back the issues associated with the environment and natural resources as the construction industry is among the major user of the world’s resources. Sustainable design, correct use, and reuse of the resources/construction materials can create the construction industry a lot more economical and greener. There’s conjointly a large demand for natural aggregates within the construction sector with a big gap in its demand and supply, which may even be reduced marginally by the employment of recycling and reuse of construction and demolition waste. Correct handling, storage, and treatment of C&D waste not only solely forestall degradation of Mother Earth but even have an important impact on sustainability using reducing the usage of natural resources. The paper covers various issues associated with the reusing and recycling of C&D waste, which needs restrictive mechanisms and procedures to be followed for achieving the aim of sustainability in the construction industry.

scholarly journals REVIEW ON GREEN BUILDING RATING TOOLS WORLDWIDE: RECOMMENDATIONS FOR AUSTRALIA

2019 ◽  
Vol 25 (8) ◽  
pp. 831-847
Author(s):  
I. M. Chethana S. Illankoon ◽  
Vivian W. Y. Tam ◽  
Khoa N. Le ◽  
Cuong N. N. Tran ◽  
Mingxue Ma
Keyword(s):  
Sustainable Development ◽  
Greenhouse Gases ◽  
Green Building ◽  
Environmental Issues ◽  
Green Buildings ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Adverse Impacts ◽  
The World ◽  
Emission Of Greenhouse Gases

Buildings could be led to adverse impacts on environment, such as generation of construction and demolition waste, and emission of greenhouse gases (GHG). Therefore, promotion on development of green buildings is in need. With the increasing awareness in sustainable development, various rating tools are promoted to evaluate the performance of green buildings. Nowadays, these tools function as a guideline for green building development. There are various green building rating tools developed worldwide, and various countries follow different rules, incentives and regulations. However, despite of promotion of green building rating tools, environmental issues from buildings are still significant in Australia. This research compared green building rating tools in Australia and other countries or regions around the world. This research found that rating tools in Australia lack of (1) mandatory criteria and (2) regulations and incentives. This paper recommended that governmental incentives should be promoted.

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