CAJ | 학술논문

针对 C70等级高强混凝土，设计了4种超高分子量聚乙烯纤维掺量混凝土，通过立方体抗压、劈裂抗拉和四点弯曲抗折试验，分析了纤维掺量对混凝土力学性能的影响。结果表明：超高分子量聚乙烯纤维对混凝土的抗压强度增强作用不明显，但较大提高了混凝土的抗拉强度和抗折强度，且对混凝土有很好的阻裂、增韧效果。在纤维体积掺量为0．3％～0．5％时，劈裂抗拉强度提高25％以上；掺量0．5％时，弯曲抗折强度提高率超过23％。
침대 C70등급고강혼응토，설계료4충초고분자량취을희섬유참량혼응토，통과립방체항압、벽렬항랍화사점만곡항절시험，분석료섬유참량대혼응토역학성능적영향。결과표명：초고분자량취을희섬유대혼응토적항압강도증강작용불명현，단교대제고료혼응토적항랍강도화항절강도，차대혼응토유흔호적조렬、증인효과。재섬유체적참량위0．3％～0．5％시，벽렬항랍강도제고25％이상；참량0．5％시，만곡항절강도제고솔초과23％。
Based on the rank C70 high strength concrete,the experiments of the cubic compression,splitting tensile and four-point bending for four kinds of ultra high molecular weight polyethylene (UHMWPE)concrete with different fiber contents were conducted to research the effects of the fiber content on mechanical properties of concrete.The results show that the enhancement effect of the UHMWPE fiber on the compressive strength of concrete is not obvious.However,the added UHMWPE fiber greatly improves the splitting tensile strength and bending strength of concrete and it has excellent effects on toughness and crack resistance of concrete.The splitting tensile strength increases more than 25% when the fiber content is between 0.3% and 0.5%;the bending strength increases more than 23% when the fiber content is 0.5%.