SUSTAINABILITY OF THE CONCRETE BY USING RECYCLED WASTE MATERIALS

Recycled waste materials obtained from industrial and agricultural processes are becoming promising thermal and acoustic insulating solutions in building applications; their use can play an important role in the environmental impact reduction. The aim of the present paper is the evaluation of the thermal performance of recycled waste panels consisting of cork scraps, rice husk, coffee chaff, and end-life granulated tires, glued in different weight ratios and pressed. Six panels obtained from the mixing of these waste materials were fabricated and analyzed. In particular, the scope is the selection of the best compromise solutions from the thermal and environmental points of view. To this aim, thermal resistances were measured in laboratory and a Life Cycle Assessment (LCA) analysis was carried out for each panel; a cross-comparative examination was performed in order to optimize their properties and find the best panels solutions to be assembled in the future. Life Cycle Analysis was carried out in terms of primary Embodied Energy and Greenhouse Gas Emissions, considering a ‘‘cradle-to-gate” approach. The obtained thermal conductivities varied in the 0.055 to 0.135 W/mK range, in the same order of magnitude of many traditional systems. The best thermal results were obtained for the panels made of granulated cork, rice husk, and coffee chaff in this order. The rubber granulate showed higher values of the thermal conductivity (about 0.15 W/mK); a very interesting combined solution was the panel composed of cork (60%), rice husk (20%), and coffee chaff (20%), with a thermal conductivity of 0.08 W/mK and a Global Warming Potential of only 2.6 kg CO2eq/m2. Considering the Embodied Energy (CED), the best solution is a panel composed of 56% of cork and 44% of coffee chaff (minimum CED and thermal conductivity).

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Removal of mixed contaminants by Fe0-based biobarrier in flow-through columns using recycled waste materials

Journal of Material Cycles and Waste Management ◽

10.1007/s10163-009-0253-5 ◽

2009 ◽

Vol 11 (3) ◽

pp. 214-221 ◽

Cited By ~ 5

Author(s):

Jai-Young Lee ◽

Sun Young Youm ◽

Sang-Il Choi ◽

Byung-Taek Oh

Keyword(s):

Waste Materials ◽

Mixed Contaminants ◽

Flow Through ◽

Recycled Waste

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Evaluation Indexes System for Assessing Road Construction with Recycled Waste Materials to Achieve Better Environmental Impacts

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.250-253.1001 ◽

2011 ◽

Vol 250-253 ◽

pp. 1001-1006 ◽

Cited By ~ 1

Author(s):

De Zhen Chen ◽

Cui Jie Geng ◽

Wen Zhou Sun

Keyword(s):

Energy Consumption ◽

Environmental Impact ◽

Waste Disposal ◽

Large Scale ◽

Construction Material ◽

Bottom Ash ◽

Road Construction ◽

Waste Materials ◽

Evaluation Indexes ◽

Recycled Waste

Evaluation indexes system has been put forward in this paper for quantifying thesystematical energy consumption, resources consumption, total emissions’ change and waste disposal capacity in road construction with recycled waste materials involved. With help of this evaluation indexes system, the contributions to environmental improvement caused by recycling waste materials in road construction can be quantified through calculating savings on environmental impact potentials, savings on energy consumption, on virgin materials’ consumption and waste disposal capacity provided by road construction. Based on the construction project of a road section numbered No.20 EWK0+400 ~ EWK0+600 of North highway to Shanghai Pudong international airport, which was the first trial project of using several kinds of recycled waste materials including bottom ash from incinerators to replace commonly used materials such as gravel in large scale in road pavement, the results of the four indexes, namely, savings on energy consumption and virgin materials’ consumption, environmental impact potentials as well as waste disposal capacity were obtained. It was found out that with multi recycled waste materials replacing part of the common construction material, systematical energy consumption can be reduced by 30%, a large amount of virgin resource consumption can be avoid and road construction also provides a remarkable large “dumping site” for solid wastes; while at the same time environmental impact potentials were saved for most impact categories except for increase in Ecotoxicity, water chronic, which was caused by heavy metals’ leaching and can be prevented by pre-treatment. Those results are useful for guiding the utilization of recycled waste materials, as well as for developing new technology process and advanced materials in road construction.

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Monitoring of experimental sections with recycled waste materials

Research and Applications in Structural Engineering, Mechanics and Computation ◽

10.1201/b15963-324 ◽

2013 ◽

pp. 673-674

Keyword(s):

Waste Materials ◽

Recycled Waste

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Application of Recycled Waste Materials for Highway Construction: Prospect and Challenges

Journal of Physics Conference Series ◽

10.1088/1742-6596/1378/2/022058 ◽

2019 ◽

Vol 1378 ◽

pp. 022058

Author(s):

D.D. Adegoke ◽

T. O. Ogundairo ◽

D.O Olukanni ◽

O.M. Olofinnade

Keyword(s):

Highway Construction ◽

Waste Materials ◽

Recycled Waste

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Comparison of mechanical and physical properties of SBR-polymer modified mortars using recycled waste materials

Journal of Industrial and Engineering Chemistry ◽

10.1016/j.jiec.2008.02.009 ◽

2008 ◽

Vol 14 (5) ◽

pp. 644-650 ◽

Cited By ~ 26

Author(s):

Eui-Hwan Hwang ◽

Young Soo Ko

Keyword(s):

Physical Properties ◽

Waste Materials ◽

Mechanical And Physical Properties ◽

Recycled Waste

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A Comprehensive Review on the Utilization of Recycled Waste Fibers in Cement-Based Composites

Materials ◽

10.3390/ma14133643 ◽

2021 ◽

Vol 14 (13) ◽

pp. 3643

Author(s):

Yang Ming ◽

Ping Chen ◽

Ling Li ◽

Guoxing Gan ◽

Gelin Pan

Keyword(s):

Resource Depletion ◽

Cost Effective ◽

Cement Composite ◽

Sustainable Construction ◽

Waste Materials ◽

Construction Sector ◽

Cost Effective Alternative ◽

Recycled Fibers ◽

Strength And Durability ◽

Recycled Waste

Ecological problems such as natural resource depletion and massive quantities of waste for disposal are now guiding progressive civilization towards sustainable construction. The reduction of natural resources and the discarding of debris into open landfills are the two main environmental concerns. As a result, managing these solid wastes is a major challenge worldwide. In comparison to disposal, insufficient landfills, ecological degradation and the economic load on the relevant agencies, recycling and reusing waste materials have a considerable influence. Waste fiber has been studied for use as a cement-based composite (CBC) ingredient. Recycling waste fibers not only makes the cement composite more cost-effective and long-lasting but also helps to reduce pollution. Plastics, carpets and steels are among the various types of waste fibers reviewed in this study for their applications in cement-based materials. The mechanical properties of CBCs with different kinds of recycled-waste fibers were explored, including their compressive, flexural and splitting tensile strength and durability properties. The use of recycled fibers in the construction industry can help to ensure sustainability from environmental, economic and social standpoints. As a result, additional scientific research is needed, as well as guidance for more researchers and experts in the construction sector to examine the unknown sustainability paths. The barriers to the effective implementation of waste fiber recycling techniques in the construction sector were reviewed, and various solutions were proposed to stimulate and ensure their use in CBCs. It was concluded that CBCs containing recycled fibers provide a long-term and cost-effective alternative for dealing with waste materials.

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