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PURPOSES : To investigate the fundamental characteristics of blast-furnace slag mortar that was hardened with activating chemicals to capture and sequester carbon dioxide. METHODS : Various mix proportions were considered to find an appropriate stregnth development in regards with various dosages of activating chemicals, calcium hydroxides and sodium silicates, and curing conditions, air-dried, wet and underwater conditions. Flow characteristics was investigated and setting time of the mortar was measured. At different ages of 3, 7 and 28days, strength development was investigated for all the mix variables. At each age, samples were analyzed with XRD. RESULTS : The measured flow values showed the mortar lost its flowability as the activating chemicals amount increased in the scale of mole concentration. The setting time of the mortar was relatively shorter than OPC mortar but the initial curing condition was important, such as temperature. The amount of activating chemicals was found not to be critical in the sense of setting time. The strength increased with the increased amount of chemicals. The XRD analysis results showed that portlandite peaks reduced and clacite increased as the age increased. This may mean the $Ca(OH)_2$ keeps absorbing $CO_2$ in the air during curing period. CONCLUSIONS : The carbon capturing and sequestering activated blast-furnace slag mortar showed successful strength gain to be used for road system materials and its carbon absorbing property was verified though XRD analysis.
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참고문헌 (7)
참고문헌 신청
Barker T. I. / 2007 / Technical Summary, In Climate Change 2007: Mitigation. Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change / Cambridge University Press
조병완 / 2006 / 알카리 활성화에 의한 플라이 애쉬 모르타르의 강도 발현 및 경화 메커니즘 / 콘크리트학회 논문집 18(4):449~458
강수태 / 2011 / 바텀애쉬를 결합재로 사용한 알칼리 활성화 시멘트 모르타르의 최적배합에 관한 연구 / 콘크리트학회 논문집 23(4):487~494
김건우 / 2012 / 혼합된 나트륨계열 활성화제에 의한 고로슬래그 기반 모르타르의 강도발현 특성 / 콘크리트학회 논문집 24(2):137~145
Lee, K. P. / 2009 / A study on optimum mixing derivation of the enviroment-friendly high performance geopolymer paste / The Korea Institute of building construction 9(2):107~110
조병완 / 2006 / 알카리 활성화에 의한 플라이 애쉬 모르타르의 강도 발현 및 경화 메커니즘 / 콘크리트학회 논문집 18(4):449~458
강수태 / 2011 / 바텀애쉬를 결합재로 사용한 알칼리 활성화 시멘트 모르타르의 최적배합에 관한 연구 / 콘크리트학회 논문집 23(4):487~494
김건우 / 2012 / 혼합된 나트륨계열 활성화제에 의한 고로슬래그 기반 모르타르의 강도발현 특성 / 콘크리트학회 논문집 24(2):137~145
Lee, K. P. / 2009 / A study on optimum mixing derivation of the enviroment-friendly high performance geopolymer paste / The Korea Institute of building construction 9(2):107~110
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