摘要
为探讨混杂纤维对喷射混凝土的力学性能影响,分别对双掺仿钢纤维与聚丙烯纤维、双掺钢纤维与仿钢纤维喷射混凝土的抗压强度、抗折强度和折压比进行试验研究,并将其与基准组、单掺纤维组的力学性能进行比较。结果表明,混杂纤维喷射混凝土较单掺纤维时的抗压强度、抗折强度及折压比均有明显提高,并能充分发挥混杂纤维的叠加效应。其中,掺量为0.7%的钢纤维与掺量为0.3%的仿钢纤维混掺时的强度及折压比为最优,并能有效弥补钢纤维易锈蚀、质量大和造价高等不足。
The experiments of the mixing of macro-synthetic fibers and polypropylene fibers,the mixing of steel fibers and macro-synthetic fibers reinforced shotcrete on the compressive strength and flexural strength were carried out,whose mechanical properties were compared with those of baseline group and single fibers group,The results show that the compressive strength,flexural strength,flexural compression ratio of hybrid fibers shotcrete are more obviously improved than those of single fibers shotcrete,and it can give full play to the superimposed effect.When the mixing contents are 0.7% of steel fibers and 0.3% of macro-synthetic fibers,the strength and flexural compression ratio of shotcrete are the best,and it is effective to make up for the disadvantages of steel fiber with its easy rust,heavy weight and high cost etc.
出处
《工业建筑》
CSCD
北大核心
2013年第8期101-105,共5页
Industrial Construction
基金
国家自然科学基金项目(41172317)
深部矿井建设省重点学科开放实验室开放基金(2011KF-01)
河南省教育厅科技攻关资助项目(2010A560010)
关键词
喷射混凝土
仿钢纤维
聚丙烯纤维
钢纤维
混杂纤维
抗压强度
抗折强度
折压比
shotcrete
macro-synthetic fiber
polypropylene fiber
steel fiber
hybrid fiber
compressive strength
flexural strength
flexural compression ratio
