Mechanical Properties and Microstructure of a Metakaolin-Based Inorganic Polymer Mortar Reinforced with Quartz Sand

The synthesis, mechanical behaviour, and microstructure of metakaolin-based geopolymer mortar reinforced with quartz sand are presented in this investigation. Fine sand (quartz sand) aggregate were added in different proportions of 50, 60, 70 or 80 wt.% to prepare the fresh metakaolin-based geopolym...

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Bibliographic Details
Published in:SILICON 2022-01, Vol.14 (1), p.263-274
Main Authors: Nana, Achile, Alomayri, Thamer Salman, Venyite, Paul, Kaze, Rodrigue C., Assaedi, Hasan Suliman, Nobouassia, Christelle Bewa, Sontia, Jordan Valdès Metekong, Ngouné, Jean, Kamseu, Elie, Leonelli, Cristina
Format: Article
Language:English
Subjects:
Aggregates
Carbon dioxide
Caustic soda
Cement
Chemistry
Chemistry and Materials Science
Compressive strength
Crack propagation
Energy consumption
Environmental Chemistry
Flexural strength
Fourier transforms
Geopolymers
Inorganic Chemistry
Interfacial bonding
Lasers
Materials Science
Mechanical properties
Metakaolin
Microstructure
Mixtures
Optical Devices
Optics
Original Paper
Photonics
Physical properties
Polymer Sciences
Polymers
Quartz
Room temperature
Sand
Sand & gravel
Sodium
Sodium hydroxide
Sodium silicates
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Summary:The synthesis, mechanical behaviour, and microstructure of metakaolin-based geopolymer mortar reinforced with quartz sand are presented in this investigation. Fine sand (quartz sand) aggregate were added in different proportions of 50, 60, 70 or 80 wt.% to prepare the fresh metakaolin-based geopolymer paste. The geopolymer mortar was achieved by a mixture of geopolymer paste and river sand in the ratio 2:5 by mass. The mixture of sodium hydroxide solution (10 M) and sodium silicate solution (Na 2 SiO 3 ) in a volume ratio of 2:3 was used as an alkaline activator. All the specimens were cured at room temperature and tested after 28 days of curing. The investigations on microstructure and physical properties indicated a significant reduction of the open pores and interconnection of micro and meso cracks in the structure network with increase in the amount of quartz sand. As a consequence, the samples show a good mechanical strength principally with the addition of 60 wt.% of quartz sand to binder with values of 8 and 66 MPa for flexural strength and compressive strength, respectively.
ISSN:1876-990X
1876-9918
DOI:10.1007/s12633-020-00816-4