摘要(英) |
To
improve the common shortcoming of the ditch cover, including
weight, unit price, and loading capacity, we try to change the
steel fiber volume content (2.5% , 3%, and 3.5%), with the
different specification of steel fiber (0.20mm and 0.25mm in
diameter). The study mainly discusses the reactive powder
concrete (RPC) in economical viewpoint, high loading capacity,
freeze-thaw cycles tolerance, and free-falling test, and
simulates the destruction of the steel fiber with high loading
by ANSYS analysis.
By numerous experiments we find the ditch cover with capable of
bearing vehicle weight. It assumes that the loading capacity of
a ditch cover is 10 tons if the vehicle weight is distributed
equally among all tires. Compared with the ditch cover with FRP
glass fiber sold in the market, the experimental result shows
the RPC ditch cover containing 2.5% steel fiber content is
reached the predetermined effect, and remains good condition on
the front view after the free-falling test. After freeze-thaw
cycles the loading capacity of the RPC ditch cover has evidently
enhancement, besides bearing at least 10 tons after the loading
capacity test. As a result, an appropriate ratio of RPC applied
in the material of ditch cover has been obtained, the above
study would provide a reference manufacturing for the RPC ditch
covers. |