| Autor: |
Qingwei Zeng, Peiwei Gao, Kuan Li, Guoqing Dong, Guanglai Jin, Xuewei Sun, Jingwei Zhao, Lifeng Chen |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Buildings, Vol 12, Iss 5, p 503 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2075-5309 |
| DOI: |
10.3390/buildings12050503 |
| Popis: |
This paper experimentally investigated the effects of varying contents of Na2O in a modified sodium silicate, sodium silicate moduli (Ms), and contents of granulated blast furnace slag (GBFS) on the compressive strength and drying shrinkage of fly ash (FA)-based geopolymer grouting materials at different ages. X-ray diffraction (XRD), mercury intrusion porosimetry (MIP), and scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM–EDS) were used to study the influences of different amounts of GBFS on the microstructure and product compositions of FA-based geopolymer grouting materials. The results show that the content of Na2O in modified sodium silicate, Ms, and the content of GBFS play a significant role in compressive strength and drying shrinkage of FA-based geopolymer grouting materials. In addition, the influence of Ms as well as the content of GBFS on the compressive strength and drying shrinkage of FA-based geopolymer grouting materials was deeply affected by curing age. The micro-performance tests and analysis clearly showed that incorporating 30 wt% GBFS can decrease the proportion of pores with large pore sizes, improve pore size distribution, and enhance the solubility of FA and further promote the formation of C-A-S-H gel within FA-based geopolymer grouting materials. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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