Properties of a new insulation material glass bubble in geopolymer concrete

Shahedan, Noor Fifinatasha and Abdullah, Mohd Mustafa Al Bakri and Mahmed, Norsuria and Kusbiantoro, Andri and Tammas-Williams, Sam and Long, Yuan Li and Aziz, Ikmal Hakem and Vizureanu, Petrica and J. Wysłocki, Jerzy and Błoch, Katarzyna and Nabiałek, Marcin (2021) Properties of a new insulation material glass bubble in geopolymer concrete. Materials, 14 (809).

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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.

Item Type: Article
Uncontrolled Keywords: Glass bubble; geopolymer concrete; thermal conductivity; specific heat; thermal diffusivity.
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Depositing User: Mr. Abdul Rahim Mat Radzuan
Date Deposited: 18 Oct 2021 02:28
Last Modified: 18 Oct 2021 02:28

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