Research on Mechanical Properties of Fiber Modified Self-compacting Concrete
In order to improve the mechanical properties of self-compacting concrete,steel fi-bers,carbon nanotube fibers,and steel fiber+carbon nanotube mixed fibers were used to modify the self-compacting concrete.The effects of the content of steel fibers,carbon nanotube fibers,and steel fiber+carbon nanotube mixed fibers on the workability,compressive strength,and splitting tensile strength of modified self-compacting concrete were studied.The results show:with the increase of steel fiber content,the slump expansion and J-ring expansion of modified self-compacting concrete gradually decrease,and T50 increases from 3.8 s to 14.3 s;as the con-tent of carbon nanotube fibers increases,the slump expansion and J-ring expansion of modified self-compacting concrete first increase and then decrease,and T50 first decreases and then increa-ses.As the content of steel fibers or carbon nanotube fibers increases,the average compressive strength of modified self-compacting concrete cubes gradually increases;as the content of carbon nanotube fibers increases from 1%to 4%,the average compressive strength of mixed fiber modi-fied self-compacting concrete cubes first increases and then decreases,reaching its maximum val-ue at a carbon nanotube fiber content of 2%.The splitting tensile strength of mixed fiber modi-fied self-compacting concrete cubes increases with the increase of steel fiber content,and the av-erage splitting tensile strength of mixed fiber modified self-compacting concrete cubes is higher than that of steel fiber modified self-compacting concrete cubes and carbon nanotube fiber modi-fied self-compacting concrete cubes.
NETL
NSTL
万方数据
维普
