Calcium Sulfoaluminate, Geopolymeric, and Cementitious Mortars for Structural Applications
This paper deals with the study of calcium sulfoaluminate (CSA) and geopolymeric (GEO) binders as alternatives to ordinary Portland cement (OPC) for the production of more environmentally-friendly construction materials. For this reason, three types of mortar with the same mechanical strength class...
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-09-01
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| Series: | Environments |
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| Online Access: | https://www.mdpi.com/2076-3298/4/3/64 |
| _version_ | 1811297860500586496 |
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| author | Alessandra Mobili Alberto Belli Chiara Giosuè Antonio Telesca Milena Marroccoli Francesca Tittarelli |
| author_facet | Alessandra Mobili Alberto Belli Chiara Giosuè Antonio Telesca Milena Marroccoli Francesca Tittarelli |
| author_sort | Alessandra Mobili |
| collection | DOAJ |
| description | This paper deals with the study of calcium sulfoaluminate (CSA) and geopolymeric (GEO) binders as alternatives to ordinary Portland cement (OPC) for the production of more environmentally-friendly construction materials. For this reason, three types of mortar with the same mechanical strength class (R3 ≥ 25 MPa, according to EN 1504-3) were tested and compared; they were based on CSA cement, an alkaline activated coal fly ash, and OPC. Firstly, binder pastes were prepared and their hydration was studied by means of X-ray diffraction (XRD) and differential thermal-thermogravimetric (DT-TG) analyses. Afterwards, mortars were compared in terms of workability, dynamic modulus of elasticity, adhesion to red clay bricks, free and restrained drying shrinkage, water vapor permeability, capillary water absorption, and resistance to sulfate attack. DT-TG and XRD analyses evidenced the main reactive phases of the investigated binders involved in the hydration reactions. Moreover, the sulfoaluminate mortar showed the smallest free shrinkage and the highest restrained shrinkage, mainly due to its high dynamic modulus of elasticity. The pore size distribution of geopolymeric mortar was responsible for the lowest capillary water absorption at short times and for the highest permeability to water vapor and the greatest resistance to sulfate attack. |
| first_indexed | 2024-04-13T06:11:18Z |
| format | Article |
| id | doaj.art-06ab24c1ce7246298272280b9a73acfe |
| institution | Directory Open Access Journal |
| issn | 2076-3298 |
| language | English |
| last_indexed | 2024-04-13T06:11:18Z |
| publishDate | 2017-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Environments |
| spelling | doaj.art-06ab24c1ce7246298272280b9a73acfe2022-12-22T02:59:03ZengMDPI AGEnvironments2076-32982017-09-01436410.3390/environments4030064environments4030064Calcium Sulfoaluminate, Geopolymeric, and Cementitious Mortars for Structural ApplicationsAlessandra Mobili0Alberto Belli1Chiara Giosuè2Antonio Telesca3Milena Marroccoli4Francesca Tittarelli5Department of Materials, Environmental Sciences and Urban Planning, Università Politecnica delle Marche, via Brecce Bianche 12, Ancona 60131, ItalyDepartment of Materials, Environmental Sciences and Urban Planning, Università Politecnica delle Marche, via Brecce Bianche 12, Ancona 60131, ItalyDepartment of Materials, Environmental Sciences and Urban Planning, Università Politecnica delle Marche, via Brecce Bianche 12, Ancona 60131, ItalySchool of Engineering, Università degli Studi della Basilicata, Viale dell’Ateneo Lucano 10, Potenza 85100, ItalySchool of Engineering, Università degli Studi della Basilicata, Viale dell’Ateneo Lucano 10, Potenza 85100, ItalyDepartment of Materials, Environmental Sciences and Urban Planning, Università Politecnica delle Marche, via Brecce Bianche 12, Ancona 60131, ItalyThis paper deals with the study of calcium sulfoaluminate (CSA) and geopolymeric (GEO) binders as alternatives to ordinary Portland cement (OPC) for the production of more environmentally-friendly construction materials. For this reason, three types of mortar with the same mechanical strength class (R3 ≥ 25 MPa, according to EN 1504-3) were tested and compared; they were based on CSA cement, an alkaline activated coal fly ash, and OPC. Firstly, binder pastes were prepared and their hydration was studied by means of X-ray diffraction (XRD) and differential thermal-thermogravimetric (DT-TG) analyses. Afterwards, mortars were compared in terms of workability, dynamic modulus of elasticity, adhesion to red clay bricks, free and restrained drying shrinkage, water vapor permeability, capillary water absorption, and resistance to sulfate attack. DT-TG and XRD analyses evidenced the main reactive phases of the investigated binders involved in the hydration reactions. Moreover, the sulfoaluminate mortar showed the smallest free shrinkage and the highest restrained shrinkage, mainly due to its high dynamic modulus of elasticity. The pore size distribution of geopolymeric mortar was responsible for the lowest capillary water absorption at short times and for the highest permeability to water vapor and the greatest resistance to sulfate attack.https://www.mdpi.com/2076-3298/4/3/64calcium sulfoaluminate cementdurabilitygeopolymerhydrationmechanical strengthmicrostructuremortarportland cement |
| spellingShingle | Alessandra Mobili Alberto Belli Chiara Giosuè Antonio Telesca Milena Marroccoli Francesca Tittarelli Calcium Sulfoaluminate, Geopolymeric, and Cementitious Mortars for Structural Applications Environments calcium sulfoaluminate cement durability geopolymer hydration mechanical strength microstructure mortar portland cement |
| title | Calcium Sulfoaluminate, Geopolymeric, and Cementitious Mortars for Structural Applications |
| title_full | Calcium Sulfoaluminate, Geopolymeric, and Cementitious Mortars for Structural Applications |
| title_fullStr | Calcium Sulfoaluminate, Geopolymeric, and Cementitious Mortars for Structural Applications |
| title_full_unstemmed | Calcium Sulfoaluminate, Geopolymeric, and Cementitious Mortars for Structural Applications |
| title_short | Calcium Sulfoaluminate, Geopolymeric, and Cementitious Mortars for Structural Applications |
| title_sort | calcium sulfoaluminate geopolymeric and cementitious mortars for structural applications |
| topic | calcium sulfoaluminate cement durability geopolymer hydration mechanical strength microstructure mortar portland cement |
| url | https://www.mdpi.com/2076-3298/4/3/64 |
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