Improving the Performance of Mortars Made from Recycled Aggregates by the Addition of Zeolitised Cineritic Tuff
Metropolitan construction and demolition waste (CDW) is currently an important source of recycled materials that, despite having completed their useful life cycle, can be reincorporated into the circular economy process (CEP); however, the recycling process is very selective, and waste material is n...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/12/1/77 |
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| author | Domingo A. Martín Jorge L. Costafreda Jorge L. Costafreda Leticia Presa |
| author_facet | Domingo A. Martín Jorge L. Costafreda Jorge L. Costafreda Leticia Presa |
| author_sort | Domingo A. Martín |
| collection | DOAJ |
| description | Metropolitan construction and demolition waste (CDW) is currently an important source of recycled materials that, despite having completed their useful life cycle, can be reincorporated into the circular economy process (CEP); however, the recycling process is very selective, and waste material is not always fully satisfactory due to the intrinsic nature of the waste. This work aims to demonstrate and establish how to increase the effectiveness of the construction and demolition waste in more resistant mortars, by mixing it with zeolitised cinerite tuff (ZCT) at varying normalised proportions. To attain the objectives of this research, a series of tests were done: First, a chemical, physical and mineralogical characterisation of the CDW and the ZCT through XRF, XRD, SEM and granulometric methods. Second, a technological test was made to determine the mechanical strength at 7, 28 and 90 days of specimens made with Portland cement (PC) and mixtures of PC/CDW, PC/ZCT, and PC/CDW-ZCT. The results obtained through the characterisation methods showed that the sample of construction and demolition waste consisted of the main phase made of portlandite and tobermorite, and by a secondary phase consisting of quartz, ettringite and calcite; whereas the ZCT has a main phase of mordenite and a secondary phase of smectite (montmorillonite), amorphous materials consisting of devitrified volcanic glass, quartz and plagioclase. Mechanical strength tests established that specimens made with PC/CDW mixtures have very discreet compressive strength values up to 44 MPa at 90 days, whereas specimens made with PC/ZCT mixtures achieved a remarkably high mechanical strength consisting of 68.5 MPa. However, the most interesting conclusion in this research is the good result obtained in mechanical strength of the specimens made up of mixtures of PC/CDW-ZCT, which increased from 52.5 to 62 MPa at 90 days of curing; this fact establishes the positive influence of ZCT on waste in the mortar mixtures, which permits the authors to establish that the objective of the work has been fulfilled. Finally, it can be argued that the results obtained in this research could contribute to more effective use of construction and demolition waste in metropolitan areas. |
| first_indexed | 2024-03-10T01:40:37Z |
| format | Article |
| id | doaj.art-acc6a9574cd548a985b8671b0c75e8c6 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T01:40:37Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-acc6a9574cd548a985b8671b0c75e8c62023-11-23T13:24:50ZengMDPI AGCrystals2073-43522022-01-011217710.3390/cryst12010077Improving the Performance of Mortars Made from Recycled Aggregates by the Addition of Zeolitised Cineritic TuffDomingo A. Martín0Jorge L. Costafreda1Jorge L. Costafreda2Leticia Presa3Escuela Técnica Superior de Ingenieros de Minas y Energía, Universidad Politécnica de Madrid C/Ríos Rosas, 21, 28003 Madrid, SpainEscuela Técnica Superior de Ingenieros de Minas y Energía, Universidad Politécnica de Madrid C/Ríos Rosas, 21, 28003 Madrid, SpainEmpresa de Proyectos Vértice, Departamento de Estructuras, Avenida XX Aniversario, Reparto Piedra Blanca, Holguín 80949, CubaEscuela Técnica Superior de Ingenieros de Minas y Energía, Universidad Politécnica de Madrid C/Ríos Rosas, 21, 28003 Madrid, SpainMetropolitan construction and demolition waste (CDW) is currently an important source of recycled materials that, despite having completed their useful life cycle, can be reincorporated into the circular economy process (CEP); however, the recycling process is very selective, and waste material is not always fully satisfactory due to the intrinsic nature of the waste. This work aims to demonstrate and establish how to increase the effectiveness of the construction and demolition waste in more resistant mortars, by mixing it with zeolitised cinerite tuff (ZCT) at varying normalised proportions. To attain the objectives of this research, a series of tests were done: First, a chemical, physical and mineralogical characterisation of the CDW and the ZCT through XRF, XRD, SEM and granulometric methods. Second, a technological test was made to determine the mechanical strength at 7, 28 and 90 days of specimens made with Portland cement (PC) and mixtures of PC/CDW, PC/ZCT, and PC/CDW-ZCT. The results obtained through the characterisation methods showed that the sample of construction and demolition waste consisted of the main phase made of portlandite and tobermorite, and by a secondary phase consisting of quartz, ettringite and calcite; whereas the ZCT has a main phase of mordenite and a secondary phase of smectite (montmorillonite), amorphous materials consisting of devitrified volcanic glass, quartz and plagioclase. Mechanical strength tests established that specimens made with PC/CDW mixtures have very discreet compressive strength values up to 44 MPa at 90 days, whereas specimens made with PC/ZCT mixtures achieved a remarkably high mechanical strength consisting of 68.5 MPa. However, the most interesting conclusion in this research is the good result obtained in mechanical strength of the specimens made up of mixtures of PC/CDW-ZCT, which increased from 52.5 to 62 MPa at 90 days of curing; this fact establishes the positive influence of ZCT on waste in the mortar mixtures, which permits the authors to establish that the objective of the work has been fulfilled. Finally, it can be argued that the results obtained in this research could contribute to more effective use of construction and demolition waste in metropolitan areas.https://www.mdpi.com/2073-4352/12/1/77construction and demolition wastezeolitised cinerite tuffcementmechanical strength |
| spellingShingle | Domingo A. Martín Jorge L. Costafreda Jorge L. Costafreda Leticia Presa Improving the Performance of Mortars Made from Recycled Aggregates by the Addition of Zeolitised Cineritic Tuff Crystals construction and demolition waste zeolitised cinerite tuff cement mechanical strength |
| title | Improving the Performance of Mortars Made from Recycled Aggregates by the Addition of Zeolitised Cineritic Tuff |
| title_full | Improving the Performance of Mortars Made from Recycled Aggregates by the Addition of Zeolitised Cineritic Tuff |
| title_fullStr | Improving the Performance of Mortars Made from Recycled Aggregates by the Addition of Zeolitised Cineritic Tuff |
| title_full_unstemmed | Improving the Performance of Mortars Made from Recycled Aggregates by the Addition of Zeolitised Cineritic Tuff |
| title_short | Improving the Performance of Mortars Made from Recycled Aggregates by the Addition of Zeolitised Cineritic Tuff |
| title_sort | improving the performance of mortars made from recycled aggregates by the addition of zeolitised cineritic tuff |
| topic | construction and demolition waste zeolitised cinerite tuff cement mechanical strength |
| url | https://www.mdpi.com/2073-4352/12/1/77 |
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