contributor author | Leping Liu | |
contributor author | Yao Hong | |
contributor author | Yue Xu | |
contributor author | Yuanyuan Li | |
contributor author | Yan He | |
date accessioned | 2024-04-27T22:56:58Z | |
date available | 2024-04-27T22:56:58Z | |
date issued | 2024/03/01 | |
identifier other | 10.1061-JMCEE7.MTENG-16493.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4297908 | |
description abstract | In this study, the changes in the phase and microstructure of alkali-activated slag (AAS) in ultralow-temperature environments (−170°C) was experimentally studied by means of X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, thermal gravimetric (TG), scanning electron microscopy energy dispersive X-ray spectroscopy (SEM-EDS), Si29 magic-angle spinning nuclear magnetic resonance (MAS NMR), and pore structure. The results show that as the modulus of water glass increased, the mass loss of AAS after the ultralow-temperature freeze–thaw cycles (ULT-FTC) decreased, the freeze–thaw resistance increased. The ULT-FTC caused the internal structure of the AAS samples using different activators to slip and rearrange. Partial calcium-(alumina)-silicate-hydrate gel [C─ (A)─ S─ H] gel was decalcified. The gel structure formed using 2.0 M water glass as the activator was the most stable. The dense structure with a lower Ca/Si ratio enables the AAS to maintain a relatively stable microstructure after undergoing ULT-FTC. | |
publisher | ASCE | |
title | Microstructure of Alkali-Activated Slag in Ultralow Temperature Environments | |
type | Journal Article | |
journal volume | 36 | |
journal issue | 3 | |
journal title | Journal of Materials in Civil Engineering | |
identifier doi | 10.1061/JMCEE7.MTENG-16493 | |
journal fristpage | 04023637-1 | |
journal lastpage | 04023637-11 | |
page | 11 | |
tree | Journal of Materials in Civil Engineering:;2024:;Volume ( 036 ):;issue: 003 | |
contenttype | Fulltext | |