摘要
为了研究不同掺量、长度、形状、类型的混杂纤维混凝土的断裂性能,制备掺入聚丙烯纤维、钢纤维混凝土试件,采用三点弯曲试验研究不同掺量、长度、形状、类型等纤维混凝土的断裂性能。结果表明:与基准试件相比,0.9 kg/m^(3)掺量的聚丙烯纤维的抗断裂性能最佳;掺入12 mm长度的聚丙烯纤维的混凝土抗断裂性能最佳;聚丙烯纤维乱向分散,黏结力较强,0.3%体积掺量的钢纤维的断裂性能最佳;掺入3 cm钢纤维混凝土的裂纹扩展范围最小;弓字型钢纤维增强混凝土结构的裂缝扩展复杂程度最高。研究成果可为混凝土力学性能优化提供借鉴与参考。
In order to study the fracture properties of mixed fiber reinforced concrete with diferent dosages,lengths,shapes,and types,specimens of polypropylene fiber and steel fiber reinforced concrete were prepared,and three-point bending tests were conducted to investigate the fracture properties of fiber-reinforced concrete with different dosages,lengths,shapes,and types.The results showed that compared with the reference specimen,the polypropylene fiber with a dosage of 0.9 kg/m^(3)had the best fracture resistance;the concrete with a length of 12mm polypropylene fibers has the best fracture resistance;Polypropylene fibers are randomly dispersed and have strong adhesion.Steel fibers with a volume fraction of 0.3%have the best fracture performance;the crack propagation range of concrete with 3cm steel fiber added is the smallest;The crack propagation complexity of bow shaped steel fiber reinforced concrete structures is the highest.The research results can provide reference and guidance for optimizing the mechanical properties of concrete.
作者
唐优秀
王中荔
TANG Youxiu;WANG Zhongli(Guangxi Vcational&Technical Institute of Industry,Nanning 530001,China)
出处
《粉煤灰综合利用》
2025年第5期33-37,共5页
Fly Ash Comprehensive Utilization
关键词
纤维改良
自密实混凝土
配合比
性能
试验
improvement of fibers
self compacting concrete
mix proportion
performance
experiment
