Plain Geopolymer Concrete Cross-Section Surface Analysis after Creep and Shrinkage Tests in Compression and Tension
International RILEM Conference on Early-Age and Long-Term Cracking in RC Structures (CRC 2021). RILEM Bookseries. Vol.31 2021
Rihards Gailītis, Andīna Sprince, Leonīds Pakrastiņš, Kinga Korniejenko, Tomass Kozlovskis

Low calcium alkaline solution activated cement composite known as geopolymer has been around for more than 40 years. The main benefit of geopolymer binder based composites is the environmental aspect - it is partially made by utilizing waste products, such as fly ash, slags, and others. It has been estimated that geopolymer binder production can cause up to 6 times less CO2 than the production of Portland cement nature. Due to the nature of the geopolymer concrete binding process, some differences in the methods cause shrinkage and creep. Because of this aspect, the long-term property development mechanism is slightly different, and the microstructure of the specimen could be dissimilar to ordinary Portland cement. There has been a lack of investigations regarding the geopolymer concrete long-term properties and micro-analysis. Also, the conditions affecting and influencing the long-term properties of the geopolymer concrete have been little studied. The geopolymer concrete is the test subject for the research. Plain geopolymer specimens that have been used for compression and tension creep and shrinkage tests. The specimens for microstructure analysis were acquired from the cylindrical shape (compression) and compact tension (CT)(tension) specimens. Polished sections were used for SEM microanalysis. Acquired polished section image cross-sections were analyzed by determining the amount of geopolymer binder, filler, and air void in the analyzed cross-section. The results were cross-referenced with creep and shrinkage test re-sults. After compression and tension creep tests and after shrinkage tests specific specimen’s cross-section parts -samples were prepared. The highest stresses zone cross-section parts had chosen and analyzed. The article's main aim was to determine the loading influence and geopolymer concrete microstructure influence on long-term properties.


Atslēgas vārdi
Geopolymer concrete, polished section microanalysis, long-term properties, compression, tension
DOI
10.1007/978-3-030-72921-9
Hipersaite
https://www.springer.com/gp/book/9783030729202

Gailītis, R., Sprince, A., Pakrastiņš, L., Korniejenko, K., Kozlovskis, T. Plain Geopolymer Concrete Cross-Section Surface Analysis after Creep and Shrinkage Tests in Compression and Tension. No: International RILEM Conference on Early-Age and Long-Term Cracking in RC Structures (CRC 2021). RILEM Bookseries. Vol.31, Francija, Paris, 8.-9. aprīlis, 2021. Cham: Springer Nature Switzerland AG, 2021, 13.-24.lpp. ISBN 978-3-030-72920-2. e-ISBN 978-3-030-72921-9. Pieejams: doi:10.1007/978-3-030-72921-9

Publikācijas valoda
English (en)
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