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논문 기본 정보

자료유형
학술저널
저자정보
양근혁 (경기대학교) 황혜주 (목포대학교)
저널정보
대한건축학회 대한건축학회 논문집 - 구조계 大韓建築學會論文集 構造系 第26卷 第3號
발행연도
2010.3
수록면
69 - 76 (8page)

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This study examined the effect of specimen size on the compressive strength and elastic modulus of high-performance rammed earth concrete. Natural hwangtoh or alkali-activated (AA) hwangtoh was used for cementless binder. The diameter of cylindrical specimens varied from 100 ㎜ to 300 ㎜, while the aspect ratio of specimens remained constant to be 2.0. In addition, a rammed earth wall of 2400×1800×300 ㎜ was constructed and cylindrical core samples of 100×200 ㎜ were prepared from the wall in order to evaluate the compressive strength of rammed earth concrete against the placing position of the concrete. Test results showed that the decreasing rate of compressive strength according to the increase of specimen size was more prominent in rammed concrete than in wet-cast concrete. In particular, the scale factor for cylindrical specimen with 100 ㎜ diameter against that with 150 ㎜ diameter was recorded to be 0.52 and 0.6 for natural hwangtoh-based rammed concrete and AA hwangtoh-based rammed concrete, respectively, indicating that these values are much lower than the scale factor for ordinary portland cement concrete specified in ACI 318-08 code provision. The compressive strength of rammed earth concrete was also significantly affected by the placing position of concrete. The compressive strength measured from core specimens sampled from bottom zone of rammed earth concrete wall was lower by around 35% than that measured from top zone. On the other hand, the elastic modulus of AA hwangtoh-based rammed concrete could be conservatively predicted using the equation proposed by ACI 318-08 when the diameter of cylindrical specimen was below 200 ㎜.

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Abstract
1. 서론
2. 실험
3. 실험결과 및 분석
4. 결론
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UCI(KEPA) : I410-ECN-0101-2010-540-002235894