摘要
对钢纤维轻骨料混凝土（SFRLAC）进行了抗压、劈拉、抗剪和弯曲性能试验研究，纤维掺量为0～120kg／m3，纤维类型分别为平直型和压痕型。试验结果表明：随着钢纤维掺量的增加，SFRLAC的抗压强度小幅上升，劈拉强度、抗剪强度和弯曲性能则显著提高，同掺量条件下，平直型和压痕型纤维对抗压强度的增强作用几乎无区别，而后者对劈拉强度、抗剪强度和弯曲性能提高幅度更大。从弯曲破坏的试件断面看，钢纤维都是被拔出，而不是被拔断，陶粒是内部断开，而不是与水泥凝胶体脱黏，建议可以适当提高陶粒强度，适当降低钢纤维的抗拉强度，以提高SFRLAC材料性价比。
The experimental research on the compressive strength, split tensile strength, shear strength and flexure behaviours of straight steel fiber and indented steel fiber reinforced lightweight aggregate concrete （SFRLAC） was conducted respectively. The mixing amount of steel fiber ranged from 0 to 120 kg/m3. The results show that the adding of steel fiber into the matrix leads to a little enhancement on compressive strength, while remarkable enhancement on the split tensile strength, shear strength and flexure behaviours. There are almost no difference between enhancing effect on the SFRLAC compressive strength of the straight steel fiber and that of indented steel fiber at the same mixing amount. The indented steel fiber leads the more obvious enhancement on the split tensile strength, shear strength and flexure behaviours of SFRLAC. On the section of bending failure specimen, the steel fibers were pulled out, not broken, and the ceramisite were broken,not destroyed from the interface debonding with the ceramisite. The advice of suitably increasing the tensile strength of ceramisite and decreasing the tensile strength of steel fiber is put forward to increase the performance price ratio of the SFRLAC.
出处
《工业建筑》
CSCD
北大核心
2014年第3期119-122,共4页
Industrial Construction
基金
广州市博士后研究项目资助
关键词
钢纤维轻骨料混凝土
抗压强度
劈拉强度
抗剪强度
弯曲性能
steel fiber reinforced lightweight aggregate concrete （SFRLAC）
compressive strength
split tensile strength
shear strength
flexure behaviours
