Based on the fact that fiber reinforced concrete meets the actual needs of concrete serv-ice in the current marine environment and the application of basalt fiber reinforced concrete in marine engineering buildings is still in the exploratory stage,research is conducted on the chan-ges and mechanisms of chloride ion penetration resistance and mechanical crack resistance after basalt fiber is added to marine engineering concrete.Using the volume addition method,basalt fi-bers with lengths of 12,18,and 24 mm were added to marine concrete at volumes of 0.1％,0.2％,and 0.3％,respectively.The influence of each fiber variable on the electrical flux and ten-sile and compressive mechanical properties of concrete was analyzed.The results show that the e-lectrical flux of concrete decreases first and then increases with the increase of fiber content,and the optimal dosage to improve the chloride ion corrosion resistance of concrete is between 0.1％and 0.2％.The chloride ion resistance of concrete with the same dosage of fibers of different si-zes is directly proportional to the fiber length.The fiber range with a positive growth trend in the compressive strength of concrete cubes is between 0.1％and 0.2％.The 18 mm fiber with a 0.2％content has the greatest improvement in the splitting tensile strength of concrete,while the 12 mm fiber concrete with a 0.3％content has the least improvement in splitting tensile strength.When 0.2％volume fiber is added,the tensile compression ratio gain of 18,24 mm ba-salt fiber reinforced concrete is the highest.When the volume content is 0.3％,the tensile com-pression ratio gain of 12 mm basalt fiber reinforced concrete is the highest.
关键词
玄武岩纤维/海工混凝土/抗氯离子渗透性能/力学性能/拉压比
Key words
basalt fiber/marine concrete/resistance to chloride ion penetration/mechanical prop-erties/tension-compression ratio
维普
万方数据