CAJ | 학술논문

以C30普通混凝土为设计配合比基准，研究了聚丙烯纤维、橡胶颗粒对再生混凝土拌合物流动性及基本力学性能的影响规律。试验结果表明：聚丙烯纤维、再生骨料、橡胶颗粒都会降低混凝土的流动性，当三种材料同时使用时流动性降低更加明显；再生混凝土中掺入橡胶颗粒后，混凝土的抗压强度、轴心抗压强度、劈拉强度、抗折强度分别不同程度的降低，但橡胶颗粒能够提高混凝土韧性，减小脆性破坏；聚丙烯纤维对再生橡胶混凝土力学性能增强作用明显，且掺量越大效果越显著。
이C30보통혼응토위설계배합비기준，연구료취병희섬유、상효과립대재생혼응토반합물류동성급기본역학성능적영향규률。시험결과표명：취병희섬유、재생골료、상효과립도회강저혼응토적류동성，당삼충재료동시사용시류동성강저경가명현；재생혼응토중참입상효과립후，혼응토적항압강도、축심항압강도、벽랍강도、항절강도분별불동정도적강저，단상효과립능구제고혼응토인성，감소취성파배；취병희섬유대재생상효혼응토역학성능증강작용명현，차참량월대효과월현저。
Based on the concrete whose strength grade is C30,the effects of polypropylene fiber、rubber particle on the recycled concrete were studied according to the test results. The results show that polypropylene fiber、recycled aggregate and rubber particle can reduce the liquidity of concrete,especially when used at the same time;Rubber particle reduces the mechanical properties(compressive strength、axial compressive strength、splitting tensile strength、flexural strength)of concrete obviously.But rubber particle improves the toughness of con-crete,making the tension and compression ratio of recycled concrete increase significantly;What’s more,we find that Polypropylene fiber can improve the mechanical properties of concrete,and the bigger the dosage is used,the more significant the effect will be.