1) Calculate the time required to grade and finish 30 km of road formation of 9.0 m width for two-lane road with motor grader having width of 3.0 m, using six passes with speed for each of the successive two passes as 5 kmph, 7 kmph and 9 kmph respectively. Assume machine efficiency based on operator skill, machine characteristics and working conditions as 80%. 2) Calculate number of transit mixers (TM) required for transporting concrete from central batching plant to site. The cycle time data of a 6 m³ typical transit mixers is given below: Loading time of TM = 6.0 minutes. Travel time of loaded TM to site = 30 minutes Average waiting time at site = 5.0 minutes Discharge time of concrete at site through concrete pump 15 Travel time for return trip = 24 minutes minutes. If the central batching plant having average output of 60 m³/hr is to run continuously, work out the requirement of no. of concrete pumps and TM.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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1) Calculate the time required to
grade and finish 30 km of road
formation of 9.0 m width for two-lane
road with motor grader having width
of 3.0 m, using six passes with speed
for each of the successive two
passes as 5 kmph, 7 kmph and 9
kmph respectively. Assume machine
efficiency based on operator skill,
machine characteristics and working
conditions as 80%.
2) Calculate number of transit mixers
(TM) required for transporting
concrete from central batching plant
to site. The cycle time data of a 6 m³
typical transit mixers is given below:
Loading time of TM = 6.0 minutes.
Travel time of loaded TM to site = 30 minutes
Average waiting time at site = 5.0 minutes
Discharge time of concrete at site through
concrete pump 15
Travel time for return trip = 24 minutes minutes.
If the central batching plant having average
output of 60 m³/hr is to run continuously, work
out the requirement of no. of concrete pumps
and TM.
Transcribed Image Text:1) Calculate the time required to grade and finish 30 km of road formation of 9.0 m width for two-lane road with motor grader having width of 3.0 m, using six passes with speed for each of the successive two passes as 5 kmph, 7 kmph and 9 kmph respectively. Assume machine efficiency based on operator skill, machine characteristics and working conditions as 80%. 2) Calculate number of transit mixers (TM) required for transporting concrete from central batching plant to site. The cycle time data of a 6 m³ typical transit mixers is given below: Loading time of TM = 6.0 minutes. Travel time of loaded TM to site = 30 minutes Average waiting time at site = 5.0 minutes Discharge time of concrete at site through concrete pump 15 Travel time for return trip = 24 minutes minutes. If the central batching plant having average output of 60 m³/hr is to run continuously, work out the requirement of no. of concrete pumps and TM.
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