Steel fibers for preparing method caused by different
Steel fiber machine manufacturing because of the properties of different steel fiber
preparationmethods are very different, such as tensile strength of cold drawn steel wire for
tensile strength 8002000MPa, cold rolled strip shearing method for 600900MPa, 700MPa
steel ingot millingmethod; condensation test is 380MPa, but for the production of heat-resistant fiber.
While the addition of enhanced mortar or concrete, length and diameter in a range of fine
wire.
Usethe circular cross section of long straight steel fiber, the length is 10 to 60 mm, diameter
of 0.2 ~ 0.6mm, length to diameter ratio is 50 ~ 100 in order to increase the interfacial
adhesion of fiber andmortar or concrete node, can choose a variety of deformed steel fiber,
the cross section isrectangular, serrated, meniscus shape; the section size along the length
and the alternating;waveform; circle; end amplification or belt hook etc..
In order to make the steel fibers are evenly dispersed in the mortar and concrete, and the
increase of the aspect ratio of the fiber, and can be used by water soluble glue bond in steel
fiber togetherinto a set of fascicular. Legal steel fiber can be used cold drawn wire cutting,
thin steel plate shear,steel block or Ingot Milling and molten steel drawnwork etc.. Preparation
of steel fiber reinforced concrete under normal temperature applications, can use low carbon
steel fiber; steel fiberconcrete and preparation of refractory, you must use the stainless steel
fiber. Mortar or concrete adding proper amount of steel fiber, can improve the tensile, flexural
strength, and greatly improvethe toughness and impact strength.
Influencing factors: according to the theory and mechanism of fiber reinforced, such as the
fiberspacing theory, theory of composite material and micro fracture theory, and analysis the
data of test, can determine the fiber reinforcing effect mainly depends on the matrix strength
(FM), fiber aspect ratio (ratio of steel fiber length of L and diameter of D is I/d), fiber volume
ratio (steel fiber concrete steel fiber volume occupied by percentage), the bonding strength
between the fiber and the matrix (tau), distribution and orientation and fiber in the matrix
(ETA) effect. When the concretedamage of steel fiber mixed, mostly the fibers are pulled out
and not be pulled off therefore, to improve the bond strength between fiber and matrix is one
of the main control factors of improving fiber reinforcing effect.
Steel fiber is mainly used in the manufacture of steel fiber concrete and steel fiber covers,
steel fiber... Any production methods can play the role of reinforcement concrete.
Fiber reinforcing effect mainly depends on the matrix strength (FM), fiber length to diameter
ratio(the ratio of the length of steel fiber, l and D diameter is I/d), fiber (volume ratio of steel
fiber reinforced concrete steel fiber volume fraction occupied), the bonding strength between
the fiber and the matrix (tau), distribution and orientation and the fiber in the matrix (ETA).
When the effect of steel fiber concrete damage, mostly the fibers are pulled out and not be
pulled off, thus to improve the bond strength between fiber and matrix is one of the main
control factors of improving fiber reinforcing effect.