CAJ | 학술논문

为探明不同种类钢纤维混凝土的工作性能，依托某高速公路桥梁改扩建项目，根据现场工程的实际要求制定了相应的配合比设计参数，通过室内试验对不同类型的钢纤维混凝土的坍落度、坍落拓展度、抗离析指标、密度、30 min坍落度损失和力学强度等指标进行测试和分析。结果表明：钢纤维混凝土的抗离析指标均小于15％，铣削型、端钩型和压痕型三种类型钢纤维混凝土在28 d时抗压强度均在68 MPa左右；铣削型钢纤维混凝土的劈裂抗拉强度和拉压比明显要比端钩型和压痕型的大，说明其韧性较好，采用铣削型钢纤维混凝土用于桥面后浇带的施工能够较好的满足相关规范技术要求。
위탐명불동충류강섬유혼응토적공작성능，의탁모고속공로교량개확건항목，근거현장공정적실제요구제정료상응적배합비설계삼수，통과실내시험대불동류형적강섬유혼응토적담락도、담락탁전도、항리석지표、밀도、30 min담락도손실화역학강도등지표진행측시화분석。결과표명：강섬유혼응토적항리석지표균소우15％，선삭형、단구형화압흔형삼충류형강섬유혼응토재28 d시항압강도균재68 MPa좌우；선삭형강섬유혼응토적벽렬항랍강도화랍압비명현요비단구형화압흔형적대，설명기인성교호，채용선삭형강섬유혼응토용우교면후요대적시공능구교호적만족상관규범기술요구。
To study the work performance of different kinds of steel fiber reinforced concrete , the design parameters of mix ratio were determined according to the requirements of an expressway reconstruction project .Laboratory experiments were conducted on different kinds of steel fiber reinforced concrete ,the slump ,slump flow ,segregation resistance ,bulk density ,slump loss in 30 minutes ,and mechanical strength (3 d ,7 d ,28 d ) of the concrete samples were tested and analyzed .The results indicate that the segregation resistance index is less than 15% ,and the 28 d compressive strength of the samples are about 68 MPa .The splitting tensile strength and tensile compressive strength ratio of milling type steel fiber reinforced concrete are much higher than those of the hook type and indentation type ,which suggest that the milling type possesses better tenacity .The indexes of milling type steel fiber reinforced concrete applied at the construction of the bridge deck pavement can meet the requirements of the related specifications .