II) calculate the unit cost without taxes of materials supplied on site
A retaining wall is to be constructed to retain an embankment on a construction site.The wall is 70m long and 5.45 m high The wall has a thickness of 40cm at base and 30cm on top. The batching of the is as follows
+ Lean concrete 250g/m3 of 400l/m3 of sand, and 800l/m3 of gravel
+ Reinforced concrete 350k/m3 of cement, 0.22tonne/m3 of rods, 400l /m3 of sand, 800L/m3 of gravel.
Consider waste in materials as supplied on site to be as follows: cement =2% sand =3% gravel 3% rods =2% . The prices below are those of materials supplied on site
. Cement=100000frs/tonne, transportation=10000frs/tonne, and handling is 4000frs/tonn.
Sand 16000frs/m3, transportation 2000frs/m3
. Gravel =36, 000frs/m3, transportation transportation 2000frs
Rods=1, 200,000frs/tonne, transportation=10, 000frs/tonne and handling=6000frs/tonne.
Execution time
-lean concrete=0.50hr/m3
-Reinforced concrete wall+footing=2hrs/m3
-Formwork placing/striking=0.75hr/m3
-Reinforcement=0.75hr/tonne
To completely construct the wall, the contractor hires 6shuttering panels for 80,000frs each and two mixers for 150,000frs each.
Work required
1) calculate the following:
a) The volume of lean concrete
b) The volume of reinforced concrete.
C) The surface area of formwork.
II) After calculation, the following quantities were obtained:
. The volume of lean concrete =14.5m3
. Volume of reinforced concrete=277m3
. Surface area of formwork=843m3
Established the command of materials to be supplied, that is, cement, sand, gravel, and rods for the project
III) calculate the unit cost without taxes of materials supplied on site
Step by step
Solved in 5 steps with 14 images
