Affiliations 

  • 1 Geopolymer and Green Technology, Center of Excellence (CEGeoGTech), Universiti Malaysia Perlis, Kangar 01000, Malaysia
  • 2 Department of Civil Infrastructure Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia
  • 3 Sultan Azlan Shah Power Station, TNB Janamanjung Sdn. Bhd, Seri Manjung, Perak 32040, Malaysia
  • 4 Faculty of Mechanical Engineering and Computer Science, Częstochowa University of Technology, 42201 Częstochowa, Poland
  • 5 Department of Physics, Częstochowa University of Technology, 42201 Częstochowa, Poland
Materials (Basel), 2021 Apr 15;14(8).
PMID: 33920865 DOI: 10.3390/ma14081973

Abstract

Thermal performance, combustibility, and fire propagation of fly ash-metakaolin (FA-MK) blended geopolymer with the addition of aluminum triphosphate, ATP (Al(H2PO4)3), and monoaluminium phosphate, MAP (AlPO4) were evaluated in this paper. To prepare the geopolymer mix, fly ash and metakaolin with a ratio of 1:1 were added with ATP and MAP in a range of 0-3% by weight. The fire/heat resistance was evaluated by comparing the residual compressive strengths after the elevated temperature exposure. Besides, combustibility and fire propagation tests were conducted to examine the thermal performance and the applicability of the geopolymers as passive fire protection. Experimental results revealed that the blended geopolymers with 1 wt.% of ATP and MAP exhibited higher compressive strength and denser geopolymer matrix than control geopolymers. The effect of ATP and MAP addition was more obvious in unheated geopolymer and little improvement was observed for geopolymer subjected to elevated temperature. ATP and MAP at 3 wt.% did not help in enhancing the elevated-temperature performance of blended geopolymers. Even so, all blended geopolymers, regardless of the addition of ATP and MAP, were regarded as the noncombustible materials with negligible (0-0.1) fire propagation index.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.