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.

1. 서 론
2. 실 험
    2.1. 지오폴리머 레진 제조
    2.2. Cf-geopolymer 복합체 성형
    2.3. 분석
3. 결과 및 고찰
    3.1. Geopolymerization
    3.2. 복합체 제조 및 특성
    3.3. Cf-geopolymer 복합체의 굴곡강도
4. 결 론
Acknowledgement
References
<저자소개>

• 이윤주(한국세라믹기술원 반도체소재센터) | Yoonjoo Lee (Semiconductor Materials Center, Korea Institute of Ceramic Engineering & Technology, Jinju 52851, Republic of Korea) Corresponding author
• 장석훈(한국세라믹기술원 반도체소재센터) | Seokhun Jang (Semiconductor Materials Center, Korea Institute of Ceramic Engineering & Technology, Jinju 52851, Republic of Korea)
• 오민경(한국세라믹기술원 반도체소재센터) | Minkyeong Oh (Semiconductor Materials Center, Korea Institute of Ceramic Engineering & Technology, Jinju 52851, Republic of Korea)
• 신동근(한국세라믹기술원 우주항공융복합소재센터) | Dong-Gen Shin (Convergence Transport Materials Center, Korea Institute of Ceramic Engineering & Technology, Jinju 52851, Republic of Korea)
• 최두현(국방과학연구소 소재에너지센터) | Doo Hyun Choi (Materials & Energy Technology Center, Agency for Defense Development, Daejeon, 34186, Republic of Korea)
• 이지은(국방과학연구소 소재에너지센터) | Jieun Lee (Materials & Energy Technology Center, Agency for Defense Development, Daejeon, 34186, Republic of Korea)
• 오창빈(국방과학연구소 소재에너지센터) | Chang-Bin Oh (Materials & Energy Technology Center, Agency for Defense Development, Daejeon, 34186, Republic of Korea)