EXPERIMENTAL STUDY ON THE USE OF GROUND GRANULATED BLAST FURNACE SLAG IN PRODUCING REACTIVE POWDER CONCRETE
Main Article Content
Abstract
With the development of industrial sectors, the demand for steel production is increasing, leading to a large amount of blast furnace slag being released. However, the use of this industrial waste in producing innovative concrete is still limited in Vietnam. The objective of this study is to use ground granulated blast furnace slag (GGBFS) to partially replace cement in the production of reactive powder concrete. The control mixture was designed with 75% cement and 25% silica fume as binder materials. Other studied mixtures were formed by replacing 15-60% cement with GGBFS. Test results indicated that the presence of GGBFS contributes to enhancing the concrete workability, reduces the unit weight of fresh concrete, decreases the water absorption, and increases the thermal insulation. Although the ultrasonic pulse velocity of concrete reduced with increasing GGBFS content, all concrete mixtures in this study had a good quality with compressive strength of higher than 75 MPa, ultrasonic pulse velocity of above 4200 m/s, and the water absorption of lower than 3.42%. Based on the experimental program in this study, the optimal GGBFS content used to replace cement was suggested as 15-30%.
Keywords
Reactive powder concrete, innovative concrete, ground granulated blast furnace slag.
Article Details
References
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