Determine the weight of rebar reinforcement for the tunnel concreting works per specified diameter, using the following considerations: a. Rebars are assumed at 150 kg per cubic meter of concrete. b. Proportions: i.  32-mm dia. Rebar = 30% ii.  25-mm dia. Rebar = 25% iii.  20-mm dia. Rebar = 20% iv.  16-mm dia. Rebar = 15% V. 10-mm dia. Rebar = 10%

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