Process Development of Fly Ash-Based Geopolymer Mortars in View of the Mechanical Characteristics
| Autor: | Aykut Tamer, Kadir Gunaydin, Hatice Öznur Öz, Neslihan Doğan-Sağlamtimur, Ahmet Bilgil |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Materials science Curing (food preservation) Absorption of water numerical analysis XRD TGA-DTA 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Article 09 Engineering 0201 civil engineering Flexural strength 021105 building & construction SEM-EDX General Materials Science waste Composite material Porosity geopolymer Microscopy QC120-168.85 QH201-278.5 Engineering (General). Civil engineering (General) TK1-9971 reuse Geopolymer Compressive strength fly ash Descriptive and experimental mechanics Fly ash Electrical engineering. Electronics. Nuclear engineering TA1-2040 Mortar environmentally friendly sustainable material 03 Chemical Sciences |
| Zdroj: | Materials Volume 14 Issue 11 Materials, Vol 14, Iss 2935, p 2935 (2021) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma14112935 |
| Popis: | This study aimed to determine the effects of design parameters, including the liquid/solid ratio (L/S), Na2SiO3/NaOH weight ratio, and curing temperature, on class F fly ash-based geopolymer composites. For this purpose, two disparate sources of fly ash were supplied from Çatalağzı (FA) and İsken Sugözü (FB) Thermal Power Plants in Turkey. Two different L/S ratios of 0.2 and 0.4 were used. The Na2SiO3/NaOH ratios in the alkaline solutions were 1, 1.5, 2, 2.5, and 3 by weight for each type of geopolymer mixture. Then, 40 different mixes were cured at two specific temperatures (70 °C and 100 °C) for 24 h and then preserved at room temperature until testing. Thereafter, the physical water absorption properties, apparent porosity, and bulk density were examined at 28 days on the hardened mortars. Additionally, compressive and flexural tests were applied to the geopolymers at 7, 28, and 90 days. It was found that the highest compressive strength was 60.1 MPa for the geopolymer manufactured with an L/S of 0.2 and Na2SiO3/NaOH ratio of 2. Moreover, the best thermal curing temperature for obtaining optimal strength characteristics was 100 °C for the FB. |
| Databáze: | OpenAIRE |
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