The Influence of FA Content on the Mechanical and Hydration Properties of Alkali-Activated Ground Granulated Blast Furnace Slag Cement

This study primarily investigates the effect of fly ash (FA) content on the mechanical properties and hydration performance of alkali-activated ground granulated blast furnace slag cement (AAGC) and compares the related properties with ordinary Portland cement (OPC). Additionally, we examined the hy...

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Bibliographic Details
Published inBuildings (Basel) Vol. 14; no. 9; p. 2973
Main Authors Liu, Yunpeng, Fu, Zhenbo, Yang, Xihao, Zhao, Yimeng, Li, Binghan, Xu, Da, Yu, Shige, Yao, Zhiyu, Sun, Zhibin, Zhen, Zhilu, Ouyang, Xinfeng, Zong, Yangyang, Tian, Wendi, Yu, Hai, Zhao, Shuli, Wei, Yen, Niu, Kangmin
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 20.09.2024
Subjects
Acceleration
Age
Bound water
Cement
Compressive strength
Emissions
Energy consumption
Flue gas
Fly ash
GBFS
GGBS
Heat release rate
Heat transfer
Hydration
hydration properties
Mechanical properties
Microcracks
Particle size
pH values
pore structure
Portland cement
Portland cements
Raw materials
Slag
Slag cements
Thermal analysis
Water
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Summary:This study primarily investigates the effect of fly ash (FA) content on the mechanical properties and hydration performance of alkali-activated ground granulated blast furnace slag cement (AAGC) and compares the related properties with ordinary Portland cement (OPC). Additionally, we examined the hydration products; performed thermal analysis, MIP, and SEM; and determined chemically bound water and pH values of AAGC. The compressive strength of AAGC showed a retrogression phenomenon from 3 to 28 days, with the 14-day and 28-day compressive strengths of AAGC being higher than those of OPC. The AAGC with 20% FA content exhibited the highest 28-day compressive strength (75 MPa). The hydration heat release rate curve of OPC and AAGC was divided into the initial induction period, induction period, acceleration period, deceleration period, and steady period. As FA content increased, the 28-day pore volume of AAGC increased, while pH values and chemically bound water decreased. SEM images of AAGC with low FA content showed more microcracks.
ISSN:2075-5309
2075-5309
DOI:10.3390/buildings14092973