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Article

The Effects of Temperature Curing on the Strength Development, Transport Properties, and Freeze-Thaw Resistance of Blast Furnace Slag Cement Mortars Modified with Nanosilica

1
Faculty of Civil and Environmental Engineering, West Pomeranian University of Technology Szczecin, 70-311 Szczecin, Poland
2
Department of Civil Engineering, São Paulo State University (UNESP), Alameda Bahia, 550, Ilha Solteira 15385000, Brazil
3
Civil Engineering Department, The University of Jordan, Amman 11942, Jordan
4
Raw Building Materials and Processing Technology Research Institute, Housing and Building National Research Center (HBRC), 87 El-Tahreer St., Dokki, Giza, Cairo 12311, Egypt
5
Structural Engineering Department, Faculty of Engineering, Mansoura University, Elgomhouria St., Mansoura 35516, Egypt
6
Building Materials and Construction Chemistry, Technische Universität Berlin, 13355 Berlin, Germany
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(24), 5800; https://doi.org/10.3390/ma13245800
Received: 28 November 2020 / Revised: 12 December 2020 / Accepted: 15 December 2020 / Published: 18 December 2020
(This article belongs to the Special Issue Advanced Civil Engineering Materials: From Synthesis to Application)
This investigation studies the effects of hot water and hot air curing on the strength development, transport properties, and freeze-thaw resistance of mortars incorporating low-heat blast furnace slag cement and nanosilica (NS). Mortar samples were prepared and stored in ambient conditions for 24 h. After demolding, mortar samples were subjected to two different hot curing methods: Hot water and hot air curing (40 °C and 60 °C) for 24 h. For comparison purposes, mortar reference mixes were prepared and cured in water and air at ambient conditions. Strength development (from 1 to 180 days), capillary water porosity, water sorptivity, and freeze-thaw resistance were tested after 180 days of curing. The experimental results showed that both curing regimes accelerate the strength development of mortars, especially in the first seven days of hydration. The highest early strengths were reported for mortars subjected to a temperature of 60 °C, followed by those cured at 40 °C. The hot water curing regime was found to be more suitable, as a result of more stable strength development. Similar findings were observed in regard to durability-related properties. It is worth noting that thermal curing can more efficiently increase strength in the presence of nanosilica, suggesting that NS is more effective in enhancing strength under thermal curing. View Full-Text
Keywords: hot water curing; hot air curing; thermal curing; nanosilica; blast-furnace slag cement; strength; freeze-thaw; sorptivity; porosity; cement mortar hot water curing; hot air curing; thermal curing; nanosilica; blast-furnace slag cement; strength; freeze-thaw; sorptivity; porosity; cement mortar
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MDPI and ACS Style

Federowicz, K.; Figueiredo, V.A.; Al-kroom, H.; Abdel-Gawwad, H.A.; Abd Elrahman, M.; Sikora, P. The Effects of Temperature Curing on the Strength Development, Transport Properties, and Freeze-Thaw Resistance of Blast Furnace Slag Cement Mortars Modified with Nanosilica. Materials 2020, 13, 5800. https://doi.org/10.3390/ma13245800

AMA Style

Federowicz K, Figueiredo VA, Al-kroom H, Abdel-Gawwad HA, Abd Elrahman M, Sikora P. The Effects of Temperature Curing on the Strength Development, Transport Properties, and Freeze-Thaw Resistance of Blast Furnace Slag Cement Mortars Modified with Nanosilica. Materials. 2020; 13(24):5800. https://doi.org/10.3390/ma13245800

Chicago/Turabian Style

Federowicz, Karol, Vitoria A. Figueiredo, Hussein Al-kroom, Hamdy A. Abdel-Gawwad, Mohamed Abd Elrahman, and Pawel Sikora. 2020. "The Effects of Temperature Curing on the Strength Development, Transport Properties, and Freeze-Thaw Resistance of Blast Furnace Slag Cement Mortars Modified with Nanosilica" Materials 13, no. 24: 5800. https://doi.org/10.3390/ma13245800

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