Journal Articles

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https://hdl.handle.net/20.500.14170/316

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Properties of a new insulation material glass bubble in geopolymer concrete

( 2021)
Noor Fifinatasha Shahedan
;
Mohd. Mustafa Al Bakri Abdullah
;
Norsuria Mahmed
;
Andri Kusbiantoro
;
Sam Tammas-Williams
;
Petrică Vizureanu
;
Jerzy J. Wysłocki
;
Ikmal Hakem Aziz
;
Katarzyna Błoch
;
Marcin Nabiałek

This paper details analytical research results into a novel geopolymer concrete embedded with glass bubble as its thermal insulating material, fly ash as its precursor material, and a combination of sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) as its alkaline activator to form a geopolymer system. The workability, density, compressive strength (per curing days), and water absorption of the sample loaded at 10% glass bubble (loading level determined to satisfy the minimum strength requirement of a load-bearing structure) were 70 mm, 2165 kg/m3, 52.58 MPa (28 days), 54.92 MPa (60 days), and 65.25 MPa (90 days), and 3.73 %, respectively. The thermal conductivity for geopolymer concrete decreased from 1.47 to 1.19 W/mK, while the thermal diffusivity decreased from 1.88 to 1.02 mm2/s due to increased specific heat from 0.96 to 1.73 MJ/m3K. The improved physicomechanical and thermal (insulating) properties resulting from embedding a glass bubble as an insulating material into geopolymer concrete resulted in a viable composite for use in the construction industry.

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