Physico-Mechanical Performances of Mortars Prepared with Sorted Earthquake Rubble: The Role of CDW Type and Contained Crystalline Phases
Construction and demolition waste (CDW) from earthquake rubbles was used here as recycled aggregates (RA) in cementitious binders. The materials were sorted in six groups: concrete (CO), natural stone (NS), tile (TI), brick (BR), perforated brick (PF) and roof tile (RT). The abundance (wt.%) of crys...
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MDPI AG
2023-04-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/7/2855 |
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| author | Antonio Galderisi Miguel Bravo Gianluca Iezzi Giuseppe Cruciani Eleonora Paris Jorge de Brito |
| author_facet | Antonio Galderisi Miguel Bravo Gianluca Iezzi Giuseppe Cruciani Eleonora Paris Jorge de Brito |
| author_sort | Antonio Galderisi |
| collection | DOAJ |
| description | Construction and demolition waste (CDW) from earthquake rubbles was used here as recycled aggregates (RA) in cementitious binders. The materials were sorted in six groups: concrete (CO), natural stone (NS), tile (TI), brick (BR), perforated brick (PF) and roof tile (RT). The abundance (wt.%) of crystalline phases in each RA type was determined by X-ray Powder Diffraction (XRPD). Each group of RAs was used alone (100 wt.% of RA) and mixed with quartz-rich virgin aggregates (VA) to prepare 13 types of mortars (12 specimens per type): one reference mortar (RM) with only VA, six recycled aggregate mortars (RAM) and six recycled-plus-virgin aggregate mortars (RVAM). The physical and mechanical properties of aggregates and mortars reflect the type and abundance of crystalline phases in each CDW group. Recycled mortars rich in concrete, natural stones and tiles have better mechanical performance than mortars prepared with recycled bricks, perforated bricks and roof tiles. For each RA, RVAMs have superior mechanical characteristics than the corresponding RAM. Since the type and amount of phases contained in recycled aggregates strongly control the mechanical performance of new construction materials, they should be routinely quantified as reported here, in addition to other physical features (water absorption, density, etc.). The separation of heterogeneous CDW into homogeneous RA groups is necessary for the production of new construction materials with stable and predictable performances to ensure CDW recycling, especially in areas hit by major adverse events, where large amounts of still valuable materials could be used for reconstruction processes. |
| first_indexed | 2024-03-11T05:32:16Z |
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| id | doaj.art-e3ae8e4fcf824268aa7b58017339d6ed |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T05:32:16Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-e3ae8e4fcf824268aa7b58017339d6ed2023-11-17T17:06:08ZengMDPI AGMaterials1996-19442023-04-01167285510.3390/ma16072855Physico-Mechanical Performances of Mortars Prepared with Sorted Earthquake Rubble: The Role of CDW Type and Contained Crystalline PhasesAntonio Galderisi0Miguel Bravo1Gianluca Iezzi2Giuseppe Cruciani3Eleonora Paris4Jorge de Brito5Dipartimento INGEO (Ingegneria & Geologia), Università di Chieti-Pescara ‘G. d’Annunzio’, 66100 Chieti, ItalyCERIS, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, PortugalDipartimento INGEO (Ingegneria & Geologia), Università di Chieti-Pescara ‘G. d’Annunzio’, 66100 Chieti, ItalyDipartimento di Fisica e Scienze della Terra, Università di Ferrara, 44122 Ferrara, ItalyScuola di Scienze e Tecnologie, sez. Geologia, Università di Camerino, 62032 Camerino, ItalyCERIS, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, PortugalConstruction and demolition waste (CDW) from earthquake rubbles was used here as recycled aggregates (RA) in cementitious binders. The materials were sorted in six groups: concrete (CO), natural stone (NS), tile (TI), brick (BR), perforated brick (PF) and roof tile (RT). The abundance (wt.%) of crystalline phases in each RA type was determined by X-ray Powder Diffraction (XRPD). Each group of RAs was used alone (100 wt.% of RA) and mixed with quartz-rich virgin aggregates (VA) to prepare 13 types of mortars (12 specimens per type): one reference mortar (RM) with only VA, six recycled aggregate mortars (RAM) and six recycled-plus-virgin aggregate mortars (RVAM). The physical and mechanical properties of aggregates and mortars reflect the type and abundance of crystalline phases in each CDW group. Recycled mortars rich in concrete, natural stones and tiles have better mechanical performance than mortars prepared with recycled bricks, perforated bricks and roof tiles. For each RA, RVAMs have superior mechanical characteristics than the corresponding RAM. Since the type and amount of phases contained in recycled aggregates strongly control the mechanical performance of new construction materials, they should be routinely quantified as reported here, in addition to other physical features (water absorption, density, etc.). The separation of heterogeneous CDW into homogeneous RA groups is necessary for the production of new construction materials with stable and predictable performances to ensure CDW recycling, especially in areas hit by major adverse events, where large amounts of still valuable materials could be used for reconstruction processes.https://www.mdpi.com/1996-1944/16/7/2855CDWXRPDmechanical propertiesrecycled aggregatemortar |
| spellingShingle | Antonio Galderisi Miguel Bravo Gianluca Iezzi Giuseppe Cruciani Eleonora Paris Jorge de Brito Physico-Mechanical Performances of Mortars Prepared with Sorted Earthquake Rubble: The Role of CDW Type and Contained Crystalline Phases Materials CDW XRPD mechanical properties recycled aggregate mortar |
| title | Physico-Mechanical Performances of Mortars Prepared with Sorted Earthquake Rubble: The Role of CDW Type and Contained Crystalline Phases |
| title_full | Physico-Mechanical Performances of Mortars Prepared with Sorted Earthquake Rubble: The Role of CDW Type and Contained Crystalline Phases |
| title_fullStr | Physico-Mechanical Performances of Mortars Prepared with Sorted Earthquake Rubble: The Role of CDW Type and Contained Crystalline Phases |
| title_full_unstemmed | Physico-Mechanical Performances of Mortars Prepared with Sorted Earthquake Rubble: The Role of CDW Type and Contained Crystalline Phases |
| title_short | Physico-Mechanical Performances of Mortars Prepared with Sorted Earthquake Rubble: The Role of CDW Type and Contained Crystalline Phases |
| title_sort | physico mechanical performances of mortars prepared with sorted earthquake rubble the role of cdw type and contained crystalline phases |
| topic | CDW XRPD mechanical properties recycled aggregate mortar |
| url | https://www.mdpi.com/1996-1944/16/7/2855 |
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