Properties of basalt-fiber reinforced foam glass

Eunseok Kim, Kwangbae Kim, Ohsung Song

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The changes in mechanical properties and thermal conductivities of fiber reinforced foam glass produced by adding 0 ~ 50 wt% basalt-fibers to 10 µm glass powder containing 6 wt% nano-carbon via low-temperature sintering at 750 °C were examined. The prepared basalt-fibers had an aspect ratio of 70.88. To study the microstructure of the foam glass, optical microscopy and scanning electron microscopy were conducted. To assess the mechanical properties and thermal conductivity of the sample, a compressive strength tester and a heat flowmeter were used, respectively. The sample was confirmed to have closed pores up to the addition of 15 wt% basalt-fiber, with open pores being observed from 20 wt% or more. Microstructure analysis showed that the sample was shown to have dense basalt-fiber clusters with an even distribution of pores at 13 wt% basalt-fibers, whereas irregular pores formed with more basalt-fiber addition. Compressive strength was increased by approximately 48 % compared to the sample without basalt-fiber addition while the sample with 13 wt% basalt-fibers showed gradual improvement up to a total of 2.96 MPa and then a gradual decrease with more addition. The thermal conductivity was seen to increase from 0.16 to 0.28 W/m·K with increasing basalt-fiber addition; nevertheless, the properties were suitable for using the samples as a thermal insulator.

Original languageEnglish
Pages (from-to)170-175
Number of pages6
JournalJournal of Asian Ceramic Societies
Volume8
Issue number1
DOIs
StatePublished - 2 Jan 2020

Keywords

  • Foam glass
  • aspect ratio
  • basalt-fiber
  • compressive strength

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