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Arabian Journal for Science and Engineering

, Volume 44, Issue 10, pp 8325–8335 | Cite as

Impact of Slag Content and Curing Methods on the Strength of Alkaline-Activated Silico-Manganese Fume/Blast Furnace Slag Mortars

  • Muhammad Nasir
  • Megat Azmi Megat Johari
  • Moruf Olalekan YusufEmail author
  • Mohammed Maslehuddin
  • Mamdouh A. Al-Harthi
  • Hatim Dafalla
Research Article - Civil Engineering
  • 37 Downloads

Abstract

In the reported study, the effect of slag content and curing methods on the strength development of alkaline activated (AA) silico-manganese fume (SiMnF (S)) and ground granulated blast furnace slag (GBSF (G)) blended mortar using NaOHaq and Na2SiO3aq was studied. The mixtures were prepared with 100% SiMnF (AAS100G0), i.e. control binder or 70% SiMnF plus 30% GBFS (AAS70G30), i.e. optimum binder and subjected to room-curing (CR) (25±2 °C) and heat-curing (CH) (60 °C for 24 h in oven) were examined. The raw materials and binders were characterized, while flow and compressive strength of mortar was evaluated. A linear increase in strength was noted in the room-cured specimens, regardless of binder type. The 3-day strength (42.6 MPa) of heat-cured AAS70G30CH specimens was 189 and 97% of the 3-day and 28-day strength, respectively, of room-cured specimens. However, a curing temperature beyond room-temperature did not favour the reaction of AAS100G0 system due to high Mn/Ca ratio and carbonation. It is postulated that the addition of 30% GBFS contributed to the strength and stability in the development of AASG mortar. Heat-curing of AAS70G30CH resulted in highest early-age strength due to dense microstructure induced by conspicuous embedment of Ca ions to the skeletal framework thereby increasing the amorphousity of the binder.

Keywords

Alkaline-activated binder (AAB) Silico-manganese fume (SiMnF) Ground granulated blast furnace slag (GBFS) Curing methods Strength 

Notes

Acknowledgements

The support provided by School of Civil Engineering at Universiti Sains Malaysia is acknowledged.

Compliance of Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© King Fahd University of Petroleum & Minerals 2019

Authors and Affiliations

  • Muhammad Nasir
    • 1
  • Megat Azmi Megat Johari
    • 1
  • Moruf Olalekan Yusuf
    • 2
    Email author
  • Mohammed Maslehuddin
    • 3
  • Mamdouh A. Al-Harthi
    • 4
    • 5
  • Hatim Dafalla
    • 3
  1. 1.School of Civil EngineeringUniversiti Sains MalaysiaNibong TebalMalaysia
  2. 2.Department of Civil EngineeringUniversity of Hafr Al BatinHafr Al BatinSaudi Arabia
  3. 3.Center for Engineering Research, Research InstituteKing Fahd University of Petroleum and MineralsDhahranSaudi Arabia
  4. 4.Department of Chemical EngineeringKing Fahd University of Petroleum and MineralsDhahranSaudi Arabia
  5. 5.Center of Research Excellences in Nanotechnology, Research InstituteKing Fahd University of Petroleum and MineralsDhahranSaudi Arabia

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