Effect of Silica Particle Size and Aging Time on the Improvement of Mechanical Properties of Geopolymer-Fiber Composites

Yoonjoo Lee; Seokhun Jang; Minkyeong Oh; Dong-Gen Shin; Doo Hyun Choi; Jieun Lee; Chang-Bin Oh

doi:10.3740/MRSK.2024.34.3.175

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2024 Vol.34, Issue 3 Preview Page

Research Paper

Effect of Silica Particle Size and Aging Time on the Improvement of Mechanical Properties of Geopolymer-Fiber Composites 실리카의 입자 크기와 Aging 시간이 지오폴리머 섬유 복합체의 기계적 물성 향상에 미치는 효과

27 March 2024. pp. 175-183

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Abstract

Geopolymer, also known as alkali aluminum silicate, is used as a substitute for Portland cement, and it is also used as a binder because of its good adhesive properties and heat resistance. Since Davidovits developed Geopolymer matrix composites (GMCs) based on the binder properties of geopolymer, they have been utilized as flame exhaust ducts and aircraft fire protection materials. Geopolymer structures are formed through hydrolysis and dehydration reactions, and their physical properties can be influenced by reaction conditions such as concentration, reaction time, and temperature. The aim of this study is to examine the effects of silica size and aging time on the mechanical properties of composites. Commercial water glass and kaolin were used to synthesize geopolymers, and two types of silica powder were added to increase the silicon content. Using carbon fiber mats, a fiber-reinforced composite material was fabricated using the hand lay-up method. Spectroscopy was used to confirm polymerization, aging effects, and heat treatment, and composite materials were used to measure flexural strength. As a result, it was confirmed that the longer time aging and use of nano-sized silica particles were helpful in improving the mechanical properties of the geopolymer matrix composite.

Keywords

geopolymer

fiber composite

ceramic composite

ceramic matrix composite

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 34
No :3
Pages :175-183
Received Date : 2023-12-12
Revised Date : 2024-02-20
Accepted Date : 2024-03-05
DOI :https://doi.org/10.3740/MRSK.2024.34.3.175

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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