Study of Different Recycling Approaches for Gypsum-Based Composites with Recycled Rubber Aggregates
The worldwide demand for gypsum resources is continuously growing due to its versatility in the building industry. In this context, incorporating recycled aggregates is gaining attention for enhancing the physico-mechanical properties of gypsum-based composites. Recycled rubber aggregates have stood...
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MDPI AG
2025-02-01
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| author | Daniel Ferrández Alicia Zaragoza-Benzal Evangelina Atanes-Sánchez Beatriz Merillas Ricardo Mateus Paulo Santos |
| author_facet | Daniel Ferrández Alicia Zaragoza-Benzal Evangelina Atanes-Sánchez Beatriz Merillas Ricardo Mateus Paulo Santos |
| author_sort | Daniel Ferrández |
| collection | DOAJ |
| description | The worldwide demand for gypsum resources is continuously growing due to its versatility in the building industry. In this context, incorporating recycled aggregates is gaining attention for enhancing the physico-mechanical properties of gypsum-based composites. Recycled rubber aggregates have stood out in recent decades as a common option in the development of prefabricated panels and sheets. This study presents a design of gypsum-based composites in which 20 to 40% of the volume of the binding material has been replaced with recycled rubber in two different formats: granulates (1.0–2.5 mm) and powder (<0.8 mm). Three series of composites have been developed to explore their recyclability: Series 1, recycled rubber aggregates and commercial gypsum; Series 2, recycled rubber aggregates (by trituration of samples from Series 1) and commercial gypsum; and Series 3, 100% recycled gypsum and rubber aggregates. All the composites surpass the minimum values of flexural and compressive strength (1 and 2 MPa, respectively) indicated by the normative result. Furthermore, the physicochemical characterisation showed the effectiveness of the recycling process of the triturated dihydrate for obtaining the hemihydrate. A study of the environmental impact revealed a 60% reduction in CO<sub>2</sub> emissions, the equivalent of producing 1 m<sup>2</sup> of prefabricated board using traditional gypsum. Therefore, this research outlines the potential of gypsum recycling with recycled rubber aggregates, thus promoting the circularity of construction products and decreasing the building’s environmental footprint. This represents a novelty compared to current studies, which are more oriented towards recycling and recovery of waste from conventional plasterboards. |
| format | Article |
| id | doaj-art-da7c67ddc93a449fbcf62ab69077cefc |
| institution | DOAJ |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj-art-da7c67ddc93a449fbcf62ab69077cefc2025-08-20T02:44:34ZengMDPI AGBuildings2075-53092025-02-0115457710.3390/buildings15040577Study of Different Recycling Approaches for Gypsum-Based Composites with Recycled Rubber AggregatesDaniel Ferrández0Alicia Zaragoza-Benzal1Evangelina Atanes-Sánchez2Beatriz Merillas3Ricardo Mateus4Paulo Santos5Departamento de Tecnología de la Edificación, Universidad Politécnica de Madrid, Avda Juan de Herrera, 6, 28040 Madrid, SpainDepartamento de Tecnología de la Edificación, Universidad Politécnica de Madrid, Avda Juan de Herrera, 6, 28040 Madrid, SpainDepartamento de Ingeniería Mecánica, Química y Diseño Industrial, Universidad Politécnica de Madrid, 28012 Madrid, SpainCellular Materials Laboratory (CellMat), Department of Condensed Material Physics, Facultad de Ciencias, University of Valladolid, 47011 Valladolid, SpainDepartment of Civil Engineering, Institute for Sustainability and Innovation in Structural Engineering (ISISE), University of Minho, 4800-058 Guimarães, PortugalUniversity of Coimbra, Department of Civil Engineering, ISISE, ARISE, 3030-788 Coimbra, PortugalThe worldwide demand for gypsum resources is continuously growing due to its versatility in the building industry. In this context, incorporating recycled aggregates is gaining attention for enhancing the physico-mechanical properties of gypsum-based composites. Recycled rubber aggregates have stood out in recent decades as a common option in the development of prefabricated panels and sheets. This study presents a design of gypsum-based composites in which 20 to 40% of the volume of the binding material has been replaced with recycled rubber in two different formats: granulates (1.0–2.5 mm) and powder (<0.8 mm). Three series of composites have been developed to explore their recyclability: Series 1, recycled rubber aggregates and commercial gypsum; Series 2, recycled rubber aggregates (by trituration of samples from Series 1) and commercial gypsum; and Series 3, 100% recycled gypsum and rubber aggregates. All the composites surpass the minimum values of flexural and compressive strength (1 and 2 MPa, respectively) indicated by the normative result. Furthermore, the physicochemical characterisation showed the effectiveness of the recycling process of the triturated dihydrate for obtaining the hemihydrate. A study of the environmental impact revealed a 60% reduction in CO<sub>2</sub> emissions, the equivalent of producing 1 m<sup>2</sup> of prefabricated board using traditional gypsum. Therefore, this research outlines the potential of gypsum recycling with recycled rubber aggregates, thus promoting the circularity of construction products and decreasing the building’s environmental footprint. This represents a novelty compared to current studies, which are more oriented towards recycling and recovery of waste from conventional plasterboards.https://www.mdpi.com/2075-5309/15/4/577gypsum-based compositesrecycled rubberend-of-life tyrescircular economylife cycle assessmentmechanical properties |
| spellingShingle | Daniel Ferrández Alicia Zaragoza-Benzal Evangelina Atanes-Sánchez Beatriz Merillas Ricardo Mateus Paulo Santos Study of Different Recycling Approaches for Gypsum-Based Composites with Recycled Rubber Aggregates Buildings gypsum-based composites recycled rubber end-of-life tyres circular economy life cycle assessment mechanical properties |
| title | Study of Different Recycling Approaches for Gypsum-Based Composites with Recycled Rubber Aggregates |
| title_full | Study of Different Recycling Approaches for Gypsum-Based Composites with Recycled Rubber Aggregates |
| title_fullStr | Study of Different Recycling Approaches for Gypsum-Based Composites with Recycled Rubber Aggregates |
| title_full_unstemmed | Study of Different Recycling Approaches for Gypsum-Based Composites with Recycled Rubber Aggregates |
| title_short | Study of Different Recycling Approaches for Gypsum-Based Composites with Recycled Rubber Aggregates |
| title_sort | study of different recycling approaches for gypsum based composites with recycled rubber aggregates |
| topic | gypsum-based composites recycled rubber end-of-life tyres circular economy life cycle assessment mechanical properties |
| url | https://www.mdpi.com/2075-5309/15/4/577 |
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