Construction Engineering & Management - Vol 2 | 16. Loading Time and Gravimetric Capacity by Abraham | Learn Smarter
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Knowledge
16. Loading Time and Gravimetric Capacity

The chapter focuses on the importance of understanding machine operating loads, gravimetric capacity, and the relationship between trucks and excavators in earthmoving operations. It emphasizes that exceeding the safe operating weight can lead to significant wear and tear on machinery, affecting production efficiency and costs. Furthermore, it discusses the balancing of interdependent machinery, highlighting how proper load management and scheduling can optimize operations.

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Sections

  • 1

    Loading Time And Gravimetric Capacity

    This section discusses the importance of loading time and the safe gravimetric capacity of machinery, emphasizing the consequences of overloading machines.

    Learning Practice

  • 1.1

    Safe Gravimetric Capacity Of Machines

    This section discusses the importance of adhering to the safe gravimetric capacity of machinery, emphasizing how overloads can lead to damage and increased operational costs.

    Learning Practice

  • 1.2

    Checking Load Weight Against Gravimetric Capacity

    This section discusses the importance of adhering to the gravimetric capacity of machines and how to effectively check the load weight against that capacity.

    Learning Practice

  • 1.3

    Impact Of Overloading On Truck And Tires

    This section discusses the consequences of overloading trucks and tires, emphasizing the importance of adhering to gravimetric capacities to avoid machine wear and increased operating costs.

    Learning Practice

  • 1.4

    Consequences Of Overloading Trucks

    Overloading trucks can lead to serious mechanical issues and increased operational costs due to wear and tear.

    Learning Practice

  • 2

    Dumping Time

    This section explains the factors affecting dumping time in construction operations, including machine types and conditions of material.

    Learning Practice

  • 2.1

    Factors Affecting Dumping Time

    This section explores the key factors that influence the time required for dumping materials in construction operations.

    Learning Practice

  • 2.2

    Comparison Of Dump Times For Different Truck Types

    This section discusses the significance of understanding dump times for various truck types, emphasizing the impact of load weight, material density, and operational conditions on productivity.

    Learning Practice

  • 2.3

    Conditions Affecting Dump Times

    This section discusses the impact of various conditions on the efficiency of dump times for trucks in construction operations.

    Learning Practice

  • 3

    Haul Time And Return Time

    This section explores the importance of understanding haul time, return time, and the safe gravimetric capacity of machinery involved in construction and material handling.

    Learning Practice

  • 3.1

    Determining Haul Time From Performance Chart

    This section focuses on calculating haul time using performance charts while emphasizing the importance of adhering to the gravimetric capacity of equipment.

    Learning Practice

  • 3.2

    Calculating Return Time

    This section explains how to calculate return time for trucks based on their loading conditions and machine capabilities, emphasizing safe operating limits.

    Learning Practice

  • 4

    Balancing Interdependent Machines

    This section explains the importance of balancing interdependent machines, specifically trucks and excavators, to maximize efficiency and reduce operational costs.

    Learning Practice

  • 4.1

    Balancing Trucks And Excavators

    This section discusses the principles of balancing trucks and excavators to achieve optimal loading efficiency and productivity while adhering to safety load limits.

    Learning Practice

  • 4.2

    Determining Balanced Number Of Trucks

    This section addresses the importance of balancing the number of trucks with the excavator's cycle time to optimize productivity and avoid machinery overload.

    Learning Practice

  • 4.2.1

    When Trucks Are Less Than The Balanced Number

    This section discusses the importance of adhering to the balanced number of trucks relative to an excavator to maximize efficiency while also considering the machine’s gravimetric capacity to prevent overload.

    Learning Practice

  • 4.2.2

    When Trucks Are Greater Than The Balanced Number

    This section discusses the implications of having more trucks than the balanced number relative to excavators, focusing on productivity and operations.

    Learning Practice

  • 4.3

    Economics Of Rounding Truck Numbers

    This section focuses on the implications of loading trucks according to their gravimetric capacity and how to determine the optimal number of trucks needed for efficient loading processes.

    Learning Practice

  • 5

    Working On The Problem For Balancing Machines

    This section covers the importance of balancing machines, particularly in terms of gravimetric capacity and cycle time in load distribution.

    Learning Practice

  • 5.1

    Finding Balance Number Of Bucket Loads

    This section examines the importance of proper truck loading and balancing excavators and trucks for optimal productivity.

    Learning Practice

  • 5.2

    Calculating Truck Cycle Time

    This section discusses methodologies for calculating the truck cycle time by considering factors such as loading time, gravimetric capacity, hauling speed, and the relationship between truck and excavator productivity.

    Learning Practice

  • 5.3

    Determining Truck Payload

    This section discusses how to determine the safe payload for trucks based on gravimetric capacity and material density.

    Learning Practice

  • 5.4

    Estimating Truck Production

    This section focuses on estimating truck production by understanding loading and unloading times, machine capacities, and balancing interdependent machines.

    Learning Practice

References

15 b.pdf

Class Notes

Memorization

What we have learnt

  • The gravimetric capacity is...
  • Congestion at dumping sites...
  • Balancing the capacities of...

Final Test

Revision Tests