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J Korean Soc Environ Eng > Volume 37(7); 2015 > Article
J Korean Soc Environ Eng 2015;37(7): 412-417. doi: https://doi.org/10.4491/KSEE.2015.37.7.412
하수슬러지 소각재와 무기바인더를 이용한 응용 블록 개발 II
이현주
용인대학교 환경학과
Development of Application Block Using Geobond and Ash from Sewage Sludge Incinerator II
Hyun-joo Lee
Department of Environmental Science, Yongin University
Corresponding author  Hyun-joo Lee ,Tel: 031-8020-2759, Fax: 031-8020-2886, Email: hjleejh@yongin.ac.kr
Received: May 26, 2015;  Revised: July 27, 2015;  Accepted: July 30, 2015.  Published online: July 31, 2015.
ABSTRACT
This study investigated to recycle geobond and ash produced in thesewage sludge incinerator using reduction/stabilization. Nonsintering process was performed by binding cement (High Early Strength Portland cement, Micro cement), geobond and sand mixed with sewage sludge ash (SSA). Chemical ingradients of the sewage sludge ash was mainly composed of SiO2, Al2O3, Fe2O3, CaO and others, which were similar to those of the each binders consisting High Early Strength Portland cement, Micro cement and geobond. Results showed that unconfined the long term compressive strength could be obtained components of sewage sludge ash. It exceeded more than double score 64.6 MPa of the Korean standard (22.54 MPa = 229.7 kg/cm2). Microstructure of solidified block for the different admixture was related to the compressive strength according to SEM analysis. Optimum mixing range of the sewage sludge ash to each binders were found to be 10~40% which can widly safely regulate the confined a long term compressive strength. The best binder of long term compressive strengh was revealed Geobond more than High Early Strength Portland cement and Micro cement. This study revealed the sewage sludge ash can be partial replacement of the inorganic binder & application block for recycling.
Key Words: Geobond, Sewage Sludge Ash (SSA), Long Term Compressive Strength, Paste, Color Block, High Early Strength Portland Cement (HESPC), Micro Cement (MC)
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