Experimental Study On Three - Dimensional Fabric Reinforced Reactive Powder Concrete Sheet And Its Punching Resistance

This dissertation is based on the National Natural Science Foundation of China:"Textile Reinforced Concrete composite beam slab structure and life mechanical cycle experimental investigation. The experiment involves new structural material and structural engineering related subject areas.This experiment used the reactive powder concrete plate component as matrix material, three-dimensional space fabric fiber network as network pouring into sheet.A kind of high performance concrete which belongs to reactive powder concrete in recent years development, compared with ordinary concrete which has high strength,strong durability and other characteristics. The test method of reactive powder concrete with the orthogonal test method was used to find out a suitable sheet a mix.A test of reactive powder concrete cube, found a strength value is relatively stable, a method of flow performance in line with the actual needs of the. This experiment also uses 3D spacer fabric, 3D spacer fabric mesh fabric net compared with the common plane, it is compressible in the thickness direction, which can withstand the pressure.In the test, the 400 mm x 100 mm x25mm 400 mm specification is used in the test, and the thin plate is used in accordance with a series of strength C120, C90, C30 pouring out the properties of the thin plate bending mechanical properties and shear mechanical properties test. In the bending test, four point bending test method is adopted, each group of test sheet includes 2-3. The shear properties of the thin plate were also tested. The test method was tested by the double side shear test. According to the C140, C120 and C90 three kinds of strength specifications, each group contains2-3 thin plate. The bending strength test and shear strength test results show that the bending strength of the thin plate can be effectively improved by using the 3D spacer mesh. Test results show that, in terms of ductility and stiffness, although the increase in the magnitude of the increase is greatly lower than the bearing capacity, the ductility enhancement effect is not obvious. After a series of thin plate bending mechanical properties and shear based on the test of mechanical properties tests using the fabric network and reactive powder concrete pouring in slab column connectionplate at the bottom of the enhancement of slab column connections after punching mechanical properties. Experiment with two groups of nodes, each node in a column.Test method for the load of hydraulic servo loading system on the stigma,displacement and mechanical curve through the computer data acquisition instrument data acquisition point. The test results show that the enhanced bearing capacity of joint mechanical enhancement after using this method, but the displacement of the node plate at the bottom of the column are not significantly increased. At the same time, the test found that the interfacel adhesion of nodes at the bottom and reactive powder concrete still need further research, can give full play to the characteristics of reactive powder concrete with high strength, high ductility.