SCGPA(Spent Coffee Grounds Pellet Ash) 치환율에 따른 시멘트 복합체의 강도 특성 및 혼화제로서의 적용 가능성에 관한 연구

초록

In this study, we evaluated the applicability of spent coffee ground pellet ash (SCGPA) as a new construction material by incorporating it into cement composites with various mixing ratios. The strength tests reveal that the optimal mixing ratio results in a 28-day compressive strength of 36.31 MPa and a flexural strength of 12 MPa. The results also show that as the replacement ratio of SCGPA in cement increases, the overall composite strength decreases. Scanning electron microscopy and X-ray diffraction analyses confirmed that SCGPA can function as a cement substitute without substantially reducing its strength when the replacement ratio is maintained at or below 10%. The findings of this study demonstrate that structural concrete with a compressive strength exceeding 30 MPa can be produced by combining SCGPA with high-quality coarse aggregates.

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