scholarly journals Mechanical Characterization of Gypsum Composites Containing Inert and Insulation Materials from Construction and Demolition Waste and Further Application as A Gypsum Block

Materials ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 193 ◽  
Author(s):  
Paola Villoria Sáez ◽  
Mercedes del Río Merino ◽  
Marica Sorrentino ◽  
César Porras Amores ◽  
Jaime Santa Cruz Astorqui ◽  
...  
Keyword(s):  
Mechanical Characteristics ◽  
Surface Hardness ◽  
Expanded Polystyrene ◽  
Raw Material ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Density Surface ◽  
Reference Samples ◽  
Physical And Mechanical Characteristics

This article analyzes the feasibility of using construction and demolition waste (expanded polystyrene, ceramic, and concrete waste) in a gypsum matrix to manufacture plaster for interior coatings or for prefabricated elements for interior partitions. To do this, several gypsum specimens were prepared (4 × 4 × 16 cm) incorporating different percentages of waste based on the weight of the gypsum (25%, 50%, and 75% of ceramic, concrete, and a mixture of both). Reference samples were also produced (without additions) to compare the results obtained. The compounds with the best performance were selected and lightened by preparing other samples in which 1/3 and 2/3 of the volume of ceramic, concrete, and mixed waste were replaced with expanded polystyrene (EPS). All samples were tested in the laboratory and the following physical and mechanical characteristics were determined: density, surface hardness, flexural strength, compressive strength, capillary water absorption, and thermal conductivity. Several applications were proposed for the selected compounds. A gypsum block with a sandwich configuration was obtained (40 × 20 × 10 cm) using the optimum compound. The block was further tested regarding its density and compression strength. A comparative analysis showed that it is possible to produce materials with a gypsum matrix by adding ceramic, concrete, and EPS waste, improving the behavior of the traditional gypsum and enabling them to be applied in various construction applications. These applications have a lower environmental impact than ordinary ones because they use less primary raw material, due to the reuse of waste.

scholarly journals Physical and mechanical characteristics of recycled aggregate obtained from construction and demolition waste.

2014 ◽  
Vol 78 (2) ◽  
pp. 121
Author(s):  
Pedro Enrique Mattey Centeno ◽  
Rafael Andrés Robayo Salazar ◽  
Yimmy Fernando Silva Urrego ◽  
Norman Andrés Álvarez Jaramillo ◽  
Silvio Delvasto Arjona
Keyword(s):  
Mechanical Characteristics ◽  
Construction And Demolition Waste ◽  
Recycled Aggregate ◽  
Demolition Waste ◽  
Physical And Mechanical Characteristics

 La saturación de los sitios de disposición de desechos sólidos es una de las grandes problemáticas que enfrentan actualmente los países latinoamericanos, incluyendo Colombia, lo que se puede atribuir a su ineficiente aprovechamiento y a la falta de políticas adecuadas para el manejo y gestión de los escombros de construcción y demolición. En la ciudad de Cali, Colombia, por ejemplo, se generan diariamente un promedio de 2.480 m3 de estos residuos sólidos, de los cuales sólo el 40% es reutilizado. Una alternativa que surge es aprovechar los residuos de la construcción en la producción de elementos prefabricados. En este estudio se realizó una transformación de una muestra puntual y representativa de escombros de demolición en agregados de diversos tamaños, con el fin de caracterizarlos desde el punto de vista físico y mecánico; evaluar su uso potencial en concretos convencionales; y estudiar la viabilidad de su uso en la producción de materiales de construcción.  

scholarly journals Construction and demolition waste as a raw material for wood polymer composites – Assessment of environmental impacts

2019 ◽  
Vol 225 ◽  
pp. 716-727 ◽  
Author(s):  
Miia Liikanen ◽  
Kaisa Grönman ◽  
Ivan Deviatkin ◽  
Jouni Havukainen ◽  
Marko Hyvärinen ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Environmental Impacts ◽  
Raw Material ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Wood Polymer ◽  
Wood Polymer Composites

The Present and the Future of Polystyrene Foam in Construction

2014 ◽  
Vol 1020 ◽  
pp. 43-48
Author(s):  
Jan Pasek ◽  
Frantisek Vörös
Keyword(s):  
Life Cycle ◽  
Environmental Issues ◽  
Expanded Polystyrene ◽  
Construction And Demolition Waste ◽  
Polystyrene Foam ◽  
Demolition Waste ◽  
Market Mechanisms ◽  
Societal Changes ◽  
Production Technologies ◽  
Sustained Effort

Chain of the life cycle of construction expanded polystyrene (production – construction application – liquidation after the end of the life cycle) is connected with significant energy consumption, consumption of oil, and production of considerable volume of construction and demolition waste. A sustained effort has been applied to increase effectiveness and to reduce the ecology waste from this process. Tools of this effort are the market mechanisms and legislation in the area of environmental issues and also the societal changes. Their consequences are especially the changes in structure of polystyrene producers and their production technologies, changes in composition of polystyrene and modification of procedures for handling the construction and demolition waste.

scholarly journals The elementary characterization of anthill clay for composite materials

2020 ◽  
Author(s):  
Suresh Aluvihara ◽  
C.S. Kalpage ◽  
P.W.S.K. Bandaranayake
Keyword(s):  
Mechanical Characteristics ◽  
Ph Value ◽  
Industrial Applications ◽  
Raw Material ◽  
Advanced Material ◽  
Standard Procedures ◽  
Soil Clay ◽  
Water Treatments ◽  
Elementary Characterization

Anthill clay is a distinct soil/clay genre among common soil types because of the extraordinary stockpiling method. The small particles are carried in and erected an anthill by a small creature that it is called as termite. In generally, clay is a conspicuous raw material for industrial applications greatly and the assay of expediencies of anthill clay for advanced material applications were the prospects of the existing research. Carefully collected anthill clay samples were characterized under the physically and chemically using standard procedures and instruments. The mechanical characteristics of prepared bricks from anthill clays under 8000C were investigated. As the major outcomes of the existing investigation of raw clays, there were looked to 5.56 of PH value, 15% of natural moisture content, gap graded and symmetrically distributed arrangement of grains, 60% finer particle percentage (<0.075mm) according to the weight, composition of Fe, Ti, Ba and K based compounds including Fe minerals with large sorption capacity for other metals. In addition that 25% of water absorption, 2.62 of bulk specific gravity, 65% of apparent porosity, 21 Mpa compressive strength and 0.4 Mpa splitting tensile strength were observed with respect to the bricks which were prepared from the anthill clay. Based on the behaviors of such anthill clay it should be an influential material in the advanced material manufacturing in the industrial purposes such as the water treatments, rigid materials, catalysts and refractors.

scholarly journals A Recycling Alternative for Expanded Polystyrene Residues Using Natural Esters

2022 ◽  
Author(s):  
Luisa V. García-Barrera ◽  
Dafne L. Ortega-Solís ◽  
Gabriela Soriano-Giles ◽  
Nazario López ◽  
Fernando Romero-Romero ◽  
...  
Keyword(s):  
Environmental Problem ◽  
Good Alternative ◽  
Expanded Polystyrene ◽  
Raw Material ◽  
Omega 3 ◽  
Scanning Calorimetry ◽  
Fishing Activity ◽  
Polystyrene Waste ◽  
Recovered Material

Abstract The objective of this research is to provide a new recycling method for one of the most consumed plastics today, since it is used for the manufacture of a wide variety of industrial products, which leads to an environmental problem caused by incorrect handling and final disposal.The dissolution of expanded polystyrene waste (WEP) was evaluated by using natural esters for its post treatment and recovery. The use of omega-3 as a natural solvent creates an opportunity to take advantage of natural biomass, since it can be obtained from the residues from the fishing activity, this being an economic advantage for obtaining raw material and also friendly with the environment.For the development of this research, expanded polystyrene containers were used, as well as omega-3 and glyceryl tributyrate as natural solvents and ethyl butyrate as synthetic solvent, methanol and isopropanol for recovery and cleaning of the polystyrene. The characterization of the recovered material was carried out with thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and infrared spectroscopy (FTIR) techniques. The experimental data obtained indicated that the use of these esters is a good alternative for the recycling of expanded polystyrene.

Mechanical and microstructural characterization of geopolymers from assorted construction and demolition waste-based masonry and glass

2021 ◽  
Vol 280 ◽  
pp. 124358
Author(s):  
Hüseyin Ulugöl ◽  
Anıl Kul ◽  
Gürkan Yıldırım ◽  
Mustafa Şahmaran ◽  
Alper Aldemir ◽  
...  
Keyword(s):  
Microstructural Characterization ◽  
Construction And Demolition Waste ◽  
Demolition Waste

Re-cycling of construction and demolition waste and steel slag: characterization of the durability

2020 ◽  
Vol 22 (6) ◽  
pp. 1699-1711
Author(s):  
António José Roque ◽  
Gonçalo Manuel Rodrigues ◽  
Paula F. da Silva
Keyword(s):  
Steel Slag ◽  
Construction And Demolition Waste ◽  
Demolition Waste

Use of construction and demolition solid wastes for basket gabion filling

2020 ◽  
Vol 38 (12) ◽  
pp. 1321-1330
Author(s):  
João Alexandre Paschoalin Filho ◽  
Diego Gonçalves Camelo ◽  
David de Carvalho ◽  
António José Guerner Dias ◽  
Brenno Augusto Marcondes Versolatto
Keyword(s):  
Solid Waste ◽  
Environmental Impacts ◽  
Retaining Wall ◽  
Retaining Walls ◽  
Raw Material ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Management Tools ◽  
Basaltic Rocks ◽  
Vertical Displacements

Construction and demolition wastes have been studied by technical means aiming at the development of management tools to reduce their environmental impacts. Among these, recycling can be highlighted. This paper aims at the technical assessment of basket gabions filled with construction and demolition solid waste. Gabions are usually used for retaining walls construction, and these are commonly filled with rocks. Retaining walls are essential for earthfill slopes stabilization, and they must have proper characteristics of strength. However, depending on the slope height or the technical responsibility of the retaining wall, alternative materials with proper characteristics could be used to fill the gabions. The use of recycled material for gabion filling could reduce environmental impacts and costs caused by retaining wall construction. So, basket gabion cells were filled with construction solid waste and basaltic rocks, both crushed into coarse granulometry aiming to compare technical characteristics among them. The performed laboratory tests showed that the horizontal and vertical displacements determined for gabion filled with wastes were near to those obtained for gabions filled with basaltic rocks for a retaining wall of 5 m and up. In conclusion, it can be drawn that basket gabions filled with construction and demolition waste may be a technical alternative for civil construction, reducing environmental impacts and raw material consumption for retaining wall execution.

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