Microstructural and Mechanical Properties of Alkali Activated Materials from Two Types of Blast Furnace Slags
College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
*
Author to whom correspondence should be addressed.
Materials 2019, 12(13), 2089; https://doi.org/10.3390/ma12132089
Received: 18 May 2019
/
Revised: 24 June 2019
/
Accepted: 24 June 2019
/
Published: 28 June 2019
(This article belongs to the Special Issue Sustainability in Construction and Building Materials)
This paper investigated the effect of blast furnace slags (BFS) characteristics on the properties achievement after being alkali activated. The physical and chemical characteristics of BFS were determined by X-ray fluorescence (XRF), X-ray Diffraction (XRD) and laser granulometry. Multi-technical characterizations using calorimetry, XRD, Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetry (TG-DTG), scanning electron microscope (SEM), nitrogen sorption and uniaxial compressive strength (UCS) were applied to give an in-depth understanding of the relationship between the reaction products, microstructure and BFS characteristics. The test results show that the microstructure and mechanical properties of alkali activated blast furnace slags (BFS) highly depend on the characteristics of BFS. Although the higher content of basic oxide could accelerate the hydration process and result in higher mechanical properties, a poor thermal stabilization was observed. On the other hand, with a higher content of Fe, the hydration process in alkali activated BFS2 lasts for a longer time, contributing to a delayed compressive strength achievement.
View Full-Text
▼
Show Figures
Figure 1
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
MDPI and ACS Style
Xing, J.; Zhao, Y.; Qiu, J.; Sun, X. Microstructural and Mechanical Properties of Alkali Activated Materials from Two Types of Blast Furnace Slags. Materials 2019, 12, 2089. https://doi.org/10.3390/ma12132089
AMA Style
Xing J, Zhao Y, Qiu J, Sun X. Microstructural and Mechanical Properties of Alkali Activated Materials from Two Types of Blast Furnace Slags. Materials. 2019; 12(13):2089. https://doi.org/10.3390/ma12132089
Chicago/Turabian StyleXing, Jun, Yingliang Zhao, Jingping Qiu, and Xiaogang Sun. 2019. "Microstructural and Mechanical Properties of Alkali Activated Materials from Two Types of Blast Furnace Slags" Materials 12, no. 13: 2089. https://doi.org/10.3390/ma12132089
Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
