Geopolymer is an alumina silicate-based ceramic material that has good heat-resistance and fire-resistance; it can be cured at room temperature, and thus its manufacturing process is simple. Geopolymer can be used as a reinforcement or floor finish for high-speed curing applications. In this manuscript, we investigate a high-speed curing geopolymer achieved by adding calcium to augment the curing rate. Metakaolin is used as the main raw material, and aqueous solutions of KOH and K2SiO3 are used as the activators. As a result of optimizing the high bending strength as a target factor for geopolymers with SiO2 / Al2O3 ratio of 4.1 ~ 4.8, the optimum ranges of the active agent are found to be 0.1 ≤ K2O / SiO2 ≤ 0.4 and 10 ≤ H2O / K2O ≤ 32.5, and the optimum range of the curing accelerator is found to be 0.82 Ca (OH)2 / Al2O3 2.87. The maximum flexural strength is found to be 1.35 MPa at Ca (OH)2 / Al2O3 = 2.82, K2O / SiO2 = 0.3, and H2O / K2O = 11.3. The physical and thermal properties are analyzed to validate the applicability of these materials as industrial insulating parts or repairing·finishing materials in construction.

Abstract
1. 서 론
2. 실험 방법
    2.1 지오폴리머 샘플의 제조 방법
    2.2 제조변수 최적화
    2.3 1차 활성제(H2O/K2O) 최적화
    2.4 2차 경화촉진제(Ca(OH)2) 최적화
    2.5 3차 SiO2,Al2O3,K2Osource비율 최적화
    2.6 물성평가
3. 결과 및 토의
4. 결 론
References

• 고현석(한국세라믹기술원 융합기술사업단) | Hyunseok Ko (Convergence Technology Division, Korea Institute of Ceramic Engineering and Technology)
• 노정영(경상대학교 나노신소재공학부 금속재료공학과) | Jung Young Noh (Department of Metallurgical and Materials Engineering, Gyeongsang National University)
• 임형미(한국세라믹기술원 융합기술사업단) | Hyung Mi Lim (Convergence Technology Division, Korea Institute of Ceramic Engineering and Technology) Corresponding author