Rheological and the Fresh State Properties of Alkali-Activated Mortars by Blast Furnace Slag
1
LAMAV-Advanced Materials Laboratory, UENF-State University of the Northern Rio de Janeiro, Av. Alberto Lamego, 2000, 28013-602 Campos dos Goytacazes, Brazil
2
LECIV-Civil Engineering Laboratory, UENF-State University of the Northern Rio de Janeiro, Av. Alberto Lamego, 2000, 28013-602 Campos dos Goytacazes, Brazil
3
Department of Civil Engineering, UFSC–Federal University of Santa Catarina, Rua João Pio Duarte Silva, 205, 88040-900 Florianópolis, Brazil
4
Coordenadoria Acadêmica, UFSM–Federal University of Santa Maria, Rodovia Taufik Germano, 3013, 96503-205 Cachoeira do Sul, Brazil
5
Department of Materials Science, IME—Military Institute of Engineering, Square General Tibúrcio, 80, 22290-270 Rio de Janeiro, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Gintautas Skripkiunas
Materials 2021, 14(8), 2069; https://doi.org/10.3390/ma14082069
Received: 26 March 2021
/
Revised: 4 April 2021
/
Accepted: 17 April 2021
/
Published: 20 April 2021
(This article belongs to the Special Issue Study on Advanced Cement-Based Materials and Their Applications)
The fresh and rheological properties of alkali mortars activated by blast furnace slag (BFS) were investigated. Consistency tests, squeeze flow, dropping ball, mass density in the hardened state, incorporated air, and water retention were performed. Mortars were produced with the ratio 1:2:0.45 (binder:sand:water), using not only ordinary Portland cement for control but also BFS, varying the sodium content of the activated alkali mortars from 2.5 to 15%. The results obtained permitted understanding that mortars containing 2.5 to 7.5% sodium present a rheological behavior similar to cementitious mortars by the Bingham model. In turn, the activated alkali mortars containing 10 to 15% sodium showed a very significant change in the properties of dynamic viscosity, which is associated with a change in the type of model, starting to behave similar to the Herschel–Bulkley model. Evaluating the properties of incorporated air and water retention, it appears that mortars containing 12.5% and 15% sodium do not have compatible properties, which is related to the occupation of sodium ions in the interstices of the material. Thus, it is concluded that the techniques used were consistent in the rheological characterization of activated alkali mortars.
View Full-Text
Keywords:
rheological; blast furnace slag; alkaline activation
▼
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
Marvila, M.T.; Azevedo, A.R.G.d.; Matos, P.R.d.; Monteiro, S.N.; Vieira, C.M.F. Rheological and the Fresh State Properties of Alkali-Activated Mortars by Blast Furnace Slag. Materials 2021, 14, 2069. https://doi.org/10.3390/ma14082069
AMA Style
Marvila MT, Azevedo ARGd, Matos PRd, Monteiro SN, Vieira CMF. Rheological and the Fresh State Properties of Alkali-Activated Mortars by Blast Furnace Slag. Materials. 2021; 14(8):2069. https://doi.org/10.3390/ma14082069
Chicago/Turabian StyleMarvila, Markssuel T., Afonso R.G.d. Azevedo, Paulo R.d. Matos, Sérgio N. Monteiro, and Carlos M.F. Vieira. 2021. "Rheological and the Fresh State Properties of Alkali-Activated Mortars by Blast Furnace Slag" Materials 14, no. 8: 2069. https://doi.org/10.3390/ma14082069
Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
