摘要
对不同体积掺量和不同长度的短切玄武岩纤维混凝土开展单轴抗压试验和巴西劈裂试验,分析玄武岩纤维对混凝土力学性能的影响。结果表明,玄武岩纤维的掺入使混凝土的破坏形态由脆性破坏向延性破坏转变。混凝土各龄期的立方体抗压强度在玄武岩纤维掺量0.05%和0.10%时均有不同程度的提升,当玄武岩纤维掺量提高到0.20%时,则有所降低;混凝土各龄期的劈裂抗拉强度在不同掺量下均有不同程度的提升。玄武岩纤维可以显著提升混凝土立方体的抗压韧性。对养护龄期为28 d时的混凝土而言,长度12 mm的玄武岩纤维,对混凝土韧度提升优于长度18 mm的纤维,其中体积掺量为0.05%时,对混凝土抗压韧度提升显著效果优于长度18 mm的纤维。
Uniaxial compression test and Brazilian splitting test were carried out on chopped basalt fiber concrete with different volume content and length to analyze the influence of basalt fiber on the mechanical properties of concrete.The results showed that the addition of basalt fiber changes the failure mode of concrete from brittle failure to ductile failure.The cube compressive strength of concrete at each age increases in varying degrees when the content of basalt fiber is 0.05%and 0.10%,and decreases when the content of basalt fiber is increased to 0.20%;The splitting tensile strength of concrete at each age increases to varying degrees with different content.Basalt fiber significantly improves the compressive toughness of concrete cube.For the concrete with a curing age of 28 days,when the volume content is 0.05%,the basalt fiber with a length of 12 mm has a significantly better effect on the compressive toughness of concrete than the fiber with a length of 18 mm.
作者
许泽宁
鲍犇
姚华彦
沈筠
孙磊
XU Zening;BAO Ben;YAO Huayan;SHEN Yun;SUN Lei(Anhui Transportation Holding Group Company,Hefei 230088,China;College of Civil Engineering,Hefei University of Technology,Hefei 230009,China)
出处
《金属矿山》
CAS
北大核心
2024年第1期310-314,共5页
Metal Mine
基金
安徽省交通控股集团有限公司科技项目(编号:JKKJ-2019-05)
安徽省重点研究与开发计划项目(编号:202004a07020027)。
关键词
玄武岩纤维混凝土
体积掺量
纤维长度
单轴抗压强度
劈裂抗拉强度
抗压韧性
basalt fiber concrete
volume content
fiber length
uniaxial compressive strength
splitting tensile strength
compressive toughness
