Fiber reinforced resin base composite material manhole cover
A fiber-reinforced resin and composite material technology, which is used in infrastructure engineering, water conservancy engineering, artificial islands, etc., and can solve the problems of material brittleness, cracks, knocked-off corners, etc.
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[0047] Manhole cover is made according to formula of the present invention, operating procedure:
[0048] 16% unsaturated resin A, 5% prepreg FRP reinforcement B, 70% aggregate C, 6% filler D, 3% wear-resistant material E.
[0049] ① Unsaturated polyester resin A consists of 80 parts of unsaturated dibasic acid and anhydride
[0050] 1.5 parts methyl ethyl ketone peroxide
[0051] 1.0 parts cobalt naphthenate
[0052] 1.0 part flame retardant hexabromobenzene
[0053] 0.1 part of inorganic pigment mixed;
[0054] ②Prepreg FRP bar B consists of 10-20 parts of unsaturated resin
[0055] 8-20 parts glass fiber
[0056] ③ Aggregate C consists of 120 parts of 40-60 mesh sand
[0057] 120 parts of 20-40 mesh sand
[0058] 80 parts of 10-20 mesh sand
[0059] 30 pieces of 2-4mm stones
[0060] 30 pieces of 4-6mm stones
[0061] ④Fil...
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