Hybrid geopolymer-cement coating mortar optimized based on metakaolin, fly ash, and granulated blast furnace slag
The use of wastes for new binders aims to reduce the environmental impact caused by the manufacture of Portland cement (PC) given the advance of urbanization. In this work, the main effects of the use of Geopolymer Cement (GC) in partial replacement to PC in mortars for coating were investigated. Th...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-10-01
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| Series: | Cleaner Engineering and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666790821001130 |
| _version_ | 1818603722890018816 |
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| author | Manuela Bazzani Kretzer Carmeane Effting Samoel Schwaab Adilson Schackow |
| author_facet | Manuela Bazzani Kretzer Carmeane Effting Samoel Schwaab Adilson Schackow |
| author_sort | Manuela Bazzani Kretzer |
| collection | DOAJ |
| description | The use of wastes for new binders aims to reduce the environmental impact caused by the manufacture of Portland cement (PC) given the advance of urbanization. In this work, the main effects of the use of Geopolymer Cement (GC) in partial replacement to PC in mortars for coating were investigated. The GC was obtained from mixtures of industrial wastes, fly ash (FA), granulated blast furnace slag (GBFS), and metakaolin (MK), activated by a solution composed of alkaline sodium silicate (SS) and potassium hydroxide (KOH). The factors used for the experimental planning were the cement replacement content, T (10, 30, and 50%, by weight) and the aggregate-cement ratio, A/C (6.11, 6.90, and 7.69, by weight). Some properties were evaluated initially: consistency, compressive strength, durability (sulfate attack) and microstructural analysis (SEM, XRD, DSC, and TG). For optimized mixture and reference were tested: consistency, setting time, the heat of hydration, water retention, compressive strength, flexural tensile strength, tensile bond strength, dimensional variation, water absorption, voids content, elastic modulus, and thermal conductivity. The results are promising for the use of GC in mortars. The optimized mortar reached values of compressive strength and flexural tensile strength of 5.65 MPa and 1.73 MPa, respectively. The results showed the feasibility of using as eco-friendly mortar for internal and external coating, or as a mortar to repair degraded coatings. Hybrid mortars did not show good performance for attack by sulfates. |
| first_indexed | 2024-12-16T13:27:42Z |
| format | Article |
| id | doaj.art-da1927e902714516b1044045b1363d91 |
| institution | Directory Open Access Journal |
| issn | 2666-7908 |
| language | English |
| last_indexed | 2024-12-16T13:27:42Z |
| publishDate | 2021-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Cleaner Engineering and Technology |
| spelling | doaj.art-da1927e902714516b1044045b1363d912022-12-21T22:30:11ZengElsevierCleaner Engineering and Technology2666-79082021-10-014100153Hybrid geopolymer-cement coating mortar optimized based on metakaolin, fly ash, and granulated blast furnace slagManuela Bazzani Kretzer0Carmeane Effting1Samoel Schwaab2Adilson Schackow3State University of Santa Catarina (UDESC), Center of Technological Sciences, Department of Civil Engineering, Civil Engineering Postgraduate Program, 89219-710, Joinville, SC, BrazilState University of Santa Catarina (UDESC), Center of Technological Sciences, Department of Civil Engineering, Civil Engineering Postgraduate Program, 89219-710, Joinville, SC, BrazilState University of Santa Catarina (UDESC), Center of Technological Sciences, Department of Mechanical Engineering, Materials Science and Engineering Postgraduate Program, 89219-710, Joinville, SC, BrazilState University of Santa Catarina (UDESC), Center of Technological Sciences, Department of Civil Engineering, Civil Engineering Postgraduate Program, 89219-710, Joinville, SC, Brazil; Corresponding author.The use of wastes for new binders aims to reduce the environmental impact caused by the manufacture of Portland cement (PC) given the advance of urbanization. In this work, the main effects of the use of Geopolymer Cement (GC) in partial replacement to PC in mortars for coating were investigated. The GC was obtained from mixtures of industrial wastes, fly ash (FA), granulated blast furnace slag (GBFS), and metakaolin (MK), activated by a solution composed of alkaline sodium silicate (SS) and potassium hydroxide (KOH). The factors used for the experimental planning were the cement replacement content, T (10, 30, and 50%, by weight) and the aggregate-cement ratio, A/C (6.11, 6.90, and 7.69, by weight). Some properties were evaluated initially: consistency, compressive strength, durability (sulfate attack) and microstructural analysis (SEM, XRD, DSC, and TG). For optimized mixture and reference were tested: consistency, setting time, the heat of hydration, water retention, compressive strength, flexural tensile strength, tensile bond strength, dimensional variation, water absorption, voids content, elastic modulus, and thermal conductivity. The results are promising for the use of GC in mortars. The optimized mortar reached values of compressive strength and flexural tensile strength of 5.65 MPa and 1.73 MPa, respectively. The results showed the feasibility of using as eco-friendly mortar for internal and external coating, or as a mortar to repair degraded coatings. Hybrid mortars did not show good performance for attack by sulfates.http://www.sciencedirect.com/science/article/pii/S2666790821001130Coating mortarsGeopolymer cementGranulated blast furnace slagFly ash mortarMetakaolin |
| spellingShingle | Manuela Bazzani Kretzer Carmeane Effting Samoel Schwaab Adilson Schackow Hybrid geopolymer-cement coating mortar optimized based on metakaolin, fly ash, and granulated blast furnace slag Cleaner Engineering and Technology Coating mortars Geopolymer cement Granulated blast furnace slag Fly ash mortar Metakaolin |
| title | Hybrid geopolymer-cement coating mortar optimized based on metakaolin, fly ash, and granulated blast furnace slag |
| title_full | Hybrid geopolymer-cement coating mortar optimized based on metakaolin, fly ash, and granulated blast furnace slag |
| title_fullStr | Hybrid geopolymer-cement coating mortar optimized based on metakaolin, fly ash, and granulated blast furnace slag |
| title_full_unstemmed | Hybrid geopolymer-cement coating mortar optimized based on metakaolin, fly ash, and granulated blast furnace slag |
| title_short | Hybrid geopolymer-cement coating mortar optimized based on metakaolin, fly ash, and granulated blast furnace slag |
| title_sort | hybrid geopolymer cement coating mortar optimized based on metakaolin fly ash and granulated blast furnace slag |
| topic | Coating mortars Geopolymer cement Granulated blast furnace slag Fly ash mortar Metakaolin |
| url | http://www.sciencedirect.com/science/article/pii/S2666790821001130 |
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