Civil Engineering and Architecture Vol. 9(6), pp. 1698 - 1716
DOI: 10.13189/cea.2021.090604
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Mechanical Properties and Microstructure of Geopolymer Binder Based on Umeanyar Slatestone Powder

Ni Kadek Astariani ^1,2,*, I Made Alit Karyawan Salain ³, I Nyoman Sutarja ³, Ida Bagus Rai Widiarsa ^3
1 Doctoral Program Engineering Science, Udayana University, Denpasar, Indonesia
² Faculty of Science and Technology, Ngurah Rai of University, Denpasar, Indonesia
³ Department of Civil Engineering, Udayana University, Badung, Indonesia

ABSTRACT

This research focuses on the mechanical and microstructure properties of geopolymer binder with slatestone waste as the base material. This geopolymer binder comes from industrial waste crushing slate in the Umeanyar area. This waste is processed into stone powder (USSP) which contains SiO₂ (49%), Al₂O₃ (11%), CaO (11.2%). This USSP uses a sodium hydroxide (SS) activator with a concentration of 14 M. The proportion of the mixture of precursor and activator (P/A) is 70%: 30%; 75%: 25%; 80%: 20% and alkaline activator Na₂SiO₃: NaOH (SS/SH) of 1:1; 1.5:1; 2:1, by weight. Samples of specimens were made in the form of a cube with a side of 50 mm and tested at the age of 7 and 28 days. Mechanical properties tested include density and compressive strength based on ASTM-C39. Meanwhile, the microstructural analysis used X-Ray Diffraction (XRD) and Scanning Electronic Microscope-Energy Dispersive X-Ray (SEM-EDX) analysis. The results of the density test were 1.90g/cm³ and 1.85g/cm³ respectively and the compressive strength test results were 7.40 MPa and 12.73 MPa at the age of 7 and 28 days, respectively.

KEYWORDS
Compressive Strength, Density, Microstructure, Geopolymer Binder, Slatestone, SEM-EDX, XRD

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Ni Kadek Astariani , I Made Alit Karyawan Salain , I Nyoman Sutarja , Ida Bagus Rai Widiarsa , "Mechanical Properties and Microstructure of Geopolymer Binder Based on Umeanyar Slatestone Powder," Civil Engineering and Architecture, Vol. 9, No. 6, pp. 1698 - 1716, 2021. DOI: 10.13189/cea.2021.090604.

(b). APA Format:
Ni Kadek Astariani , I Made Alit Karyawan Salain , I Nyoman Sutarja , Ida Bagus Rai Widiarsa (2021). Mechanical Properties and Microstructure of Geopolymer Binder Based on Umeanyar Slatestone Powder. Civil Engineering and Architecture, 9(6), 1698 - 1716. DOI: 10.13189/cea.2021.090604.