CAJ | 학술논문

利用直径100 mm的SHPB试验系统，对不同纤维体积掺量的玄武岩纤维混凝土进行平台巴西圆盘试验，研究其在冲击荷载作用下的劈裂拉伸特性。试验结果表明：BFRC的静态劈拉强度和静态抗压强度随纤维体积掺量的增大呈先增大、后减小的变化趋势；随着冲击弹速的提高，BFRC的冲击劈拉强度及冲击劈拉韧度不断增大，表现出明显的冲击强化效应；掺入玄武岩纤维可以有效提高BFRC的冲击劈拉性能，使得同一弹速下BFRC的冲击劈拉强度和冲击劈拉韧度较素混凝土普遍增大；基于本文的试验条件及配合比，玄武岩纤维的相对最优体积掺量为0.2%。
이용직경100 mm적SHPB시험계통，대불동섬유체적참량적현무암섬유혼응토진행평태파서원반시험，연구기재충격하재작용하적벽렬랍신특성。시험결과표명：BFRC적정태벽랍강도화정태항압강도수섬유체적참량적증대정선증대、후감소적변화추세；수착충격탄속적제고，BFRC적충격벽랍강도급충격벽랍인도불단증대，표현출명현적충격강화효응；참입현무암섬유가이유효제고BFRC적충격벽랍성능，사득동일탄속하BFRC적충격벽랍강도화충격벽랍인도교소혼응토보편증대；기우본문적시험조건급배합비，현무암섬유적상대최우체적참량위0.2%。
The impact splitting tensile tests of basalt fiber reinforced concrete(BFRC)using flattened Brazilian disc samples were performed with split Hopkinson pressure bar (SHPB)system of 100 mm diameter.The splitting tensile characteristics of basalt fiber reinforced con-crete under impact loading were investigated.The test results showed that the static splitting tensile strength and static compressive strength of basalt fiber reinforced concrete increase first and then decreased with the increase of fiber volumetric fraction.With the rising of impact veloci-ty,the impact splitting tensile strength and impact splitting tensile toughness of basalt fiber reinforced concrete increased constantly ,the impact strengthening effect was obvious.The addition of basalt fiber can effectively improve the splitting tensile properties of basalt fiber rein-forced concrete and increase it's impact splitting tensile strength and impact splitting tensile toughness compared with plain concrete under the same impact velocity.The relatively best volumetric fraction of basalt fiber was 0.2%based on the test condition and mix proportions.