# machine productivity

50 %
50 %

Published on December 18, 2016

Author: abinrjky

Source: slideshare.net

1. CEB ASSIGNMENT ABIN BABU ANAND PREMNATH AJAS SUNIL

2. • Concrete required -5000CuM • Time -25 months,12.5 months ,5 months • Plants owned by company • 30 M3 batching plant -4 no's • 60 M3 batching plant -1 no's • 120 M3 batching plant -1 no's • Calculate combinations of batching plants to be operated? • Transit mixers and no's?

3. COMBINATIONS months 25 months 12.5 months 5 months Total concrete required 50000 50000 50000 Concrete required/month on average(M3) 2000 4000 10000 Assuming 20 days of delivery Concrete required /day(M3) 100 200 500 Combinations 1)operating 120 m3 plant at plant at lesser efficiency 2)operating 60 m3 at optimum efficiency along with one 30 m3 plant in little higher efficiency 1)operating 120 m3 & 60 m3 60 m3 plant at optimum efficiency and one 30 m3 1)maximum optimum production possible /day /day 300 m3. Have to arrange externally externally 200 m3

4. TRANSIT MIXERS Months 25 months 12.5 months 5 months Total concrete required 50000 50000 50000 Concrete required/month on average(m3) 2000 4000 10000 Assuming 20 days of delivery Concrete required /day(m3) 100 200 500 Assume batching plant is 5 km away .1 cycle time =45 min. Using transit mixers of 8 CuY which is most popular (8yd³= 6.116439m³) No of transit mixers 2 4 10 Efficiency of working assumed is 85%.Mixing speed 8-12 rpm