Consistency of fly ash and Metakaolin concrete
As high‐performance Portland cement (PC), fly ash (FA) and metakaolin (MK) concrete have been developed in wide applications, it has growing interest in optimizing and predicting consistency of fresh PC‐FA‐MK concrete for efficient and practical design and construction. This paper presents statistic...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Vilnius Gediminas Technical University
2009-06-01
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| Series: | Journal of Civil Engineering and Management |
| Subjects: | |
| Online Access: | https://www.bme.vgtu.lt/index.php/JCEM/article/view/6398 |
| _version_ | 1818913976498520064 |
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| author | Jiping Bai Albinas Gailius |
| author_facet | Jiping Bai Albinas Gailius |
| author_sort | Jiping Bai |
| collection | DOAJ |
| description | As high‐performance Portland cement (PC), fly ash (FA) and metakaolin (MK) concrete have been developed in wide applications, it has growing interest in optimizing and predicting consistency of fresh PC‐FA‐MK concrete for efficient and practical design and construction. This paper presents statistical models for predicting the consistency of concrete incorporating PC, FA and MK from the experimental results of standard consistency tests. They reflect the effect of variations of pozzolanic replacement materials including FA and MK at graduated replacement levels of up to 40% and 15%, respectively. The predictions produced are compared with the experimental results of consistency of concrete blends. Models show that they can be used to predict the consistency parameters including slump, compacting factor and Vebe time with a good degree of accuracy in a wide range of FA‐MK blends. Design guidelines for evaluating consistency parameters are tentatively recommended along with their confidence intervals for prediction limits at 5% significance levels.
Santrauka
Straipsnyje aprašyti cementbetonio mišinio su lakiaisiais pelenais ir metakaolinu konsistencijos (slankumo, sutankinamumo, Vebe rodiklio) tyrimai. Parenkant betono mišinių sudėtis buvo naudojami lakieji pelenai, kurie pakeisdavo iki 40 % portlandcemenčio ir metakaolinas, kurio buvo dedama iki 15 % cemento masės. Atitinkamai buvo keičiami ir portlandcemenčio kiekiai. Remiantis tyrimų rezultatais, pasiūlyti statistiniai modeliai įvairių sudėčių betono mišinio konsistencijai prognozuoti. Palyginus prognozuojamus ir eksperimentinių tyrimų betono mišinio konsistencijos rodiklius nustatyta, kad jie labai gerai koreliuoja. Todėl pasiūlytus statistinius prognozavimo modelius galima taikyti betonų technologijos praktikoje.
First Published Online: 14 Oct 2010
Reikšminiai žodžiai: betono mišinio konsistencija, regresijos modelis, prognozavimas, portlandcementis, lakieji pelenai, metakaolinas. |
| first_indexed | 2024-12-19T23:39:03Z |
| format | Article |
| id | doaj.art-03609afc79b14c93b4010e39f63500e5 |
| institution | Directory Open Access Journal |
| issn | 1392-3730 1822-3605 |
| language | English |
| last_indexed | 2024-12-19T23:39:03Z |
| publishDate | 2009-06-01 |
| publisher | Vilnius Gediminas Technical University |
| record_format | Article |
| series | Journal of Civil Engineering and Management |
| spelling | doaj.art-03609afc79b14c93b4010e39f63500e52022-12-21T20:01:29ZengVilnius Gediminas Technical UniversityJournal of Civil Engineering and Management1392-37301822-36052009-06-0115210.3846/1392-3730.2009.15.131-135Consistency of fly ash and Metakaolin concreteJiping Bai0Albinas Gailius1Dept of Engineering, Faculty of Advanced Technology, University of Glamorgan, Pontypridd, CF37 1DL, UKDept of Building Materials, Vilnius Gediminas Technical University, Saulėtekio al. 11, 10223 Vilnius, LithuaniaAs high‐performance Portland cement (PC), fly ash (FA) and metakaolin (MK) concrete have been developed in wide applications, it has growing interest in optimizing and predicting consistency of fresh PC‐FA‐MK concrete for efficient and practical design and construction. This paper presents statistical models for predicting the consistency of concrete incorporating PC, FA and MK from the experimental results of standard consistency tests. They reflect the effect of variations of pozzolanic replacement materials including FA and MK at graduated replacement levels of up to 40% and 15%, respectively. The predictions produced are compared with the experimental results of consistency of concrete blends. Models show that they can be used to predict the consistency parameters including slump, compacting factor and Vebe time with a good degree of accuracy in a wide range of FA‐MK blends. Design guidelines for evaluating consistency parameters are tentatively recommended along with their confidence intervals for prediction limits at 5% significance levels. Santrauka Straipsnyje aprašyti cementbetonio mišinio su lakiaisiais pelenais ir metakaolinu konsistencijos (slankumo, sutankinamumo, Vebe rodiklio) tyrimai. Parenkant betono mišinių sudėtis buvo naudojami lakieji pelenai, kurie pakeisdavo iki 40 % portlandcemenčio ir metakaolinas, kurio buvo dedama iki 15 % cemento masės. Atitinkamai buvo keičiami ir portlandcemenčio kiekiai. Remiantis tyrimų rezultatais, pasiūlyti statistiniai modeliai įvairių sudėčių betono mišinio konsistencijai prognozuoti. Palyginus prognozuojamus ir eksperimentinių tyrimų betono mišinio konsistencijos rodiklius nustatyta, kad jie labai gerai koreliuoja. Todėl pasiūlytus statistinius prognozavimo modelius galima taikyti betonų technologijos praktikoje. First Published Online: 14 Oct 2010 Reikšminiai žodžiai: betono mišinio konsistencija, regresijos modelis, prognozavimas, portlandcementis, lakieji pelenai, metakaolinas.https://www.bme.vgtu.lt/index.php/JCEM/article/view/6398concrete consistencypredictionregression modelsportland cementfly ashmetakaolin |
| spellingShingle | Jiping Bai Albinas Gailius Consistency of fly ash and Metakaolin concrete Journal of Civil Engineering and Management concrete consistency prediction regression models portland cement fly ash metakaolin |
| title | Consistency of fly ash and Metakaolin concrete |
| title_full | Consistency of fly ash and Metakaolin concrete |
| title_fullStr | Consistency of fly ash and Metakaolin concrete |
| title_full_unstemmed | Consistency of fly ash and Metakaolin concrete |
| title_short | Consistency of fly ash and Metakaolin concrete |
| title_sort | consistency of fly ash and metakaolin concrete |
| topic | concrete consistency prediction regression models portland cement fly ash metakaolin |
| url | https://www.bme.vgtu.lt/index.php/JCEM/article/view/6398 |
| work_keys_str_mv | AT jipingbai consistencyofflyashandmetakaolinconcrete AT albinasgailius consistencyofflyashandmetakaolinconcrete |