Concrete Transportation Methods
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Questions and Answers

What is a key requirement for the continuous operation of a concrete pump?

  • A batching plant with a large storage capacity
  • A constant supply of freshly-mixed concrete (correct)
  • A stationary mixer on the jobsite
  • A flexible hose at the end of the pump's rigid pipeline

    • Which type of truck mixer is often used for large construction projects?

  • Stationary mixer
  • Rear discharge mixer
  • Agitating mixer (correct)
  • Non-agitating mixer

    • What is a major advantage of using pipelines for transporting concrete?

  • They reduce the need for labor on the jobsite
  • They can handle large volumes of concrete
  • They eliminate the need for a central discharge point
  • They take up little space and can be readily extended (correct)

    • What is a potential concern when using a pump for transporting concrete?

    <p>The concrete may segregate during transportation</p> Signup and view all the answers

    What is the primary function of a batching plant?

    <p>To batch and mix concrete</p> Signup and view all the answers

    What should be carefully scheduled to keep a crane busy?

    <p>Trades and operations</p> Signup and view all the answers

    What is a key advantage of nonagitating truck batching, mixing, transporting, and handling concrete systems?

    <p>Lower cost of equipment compared to agitator trucks</p> Signup and view all the answers

    What is a crucial aspect of preventive maintenance for batching and mixing systems?

    <p>Good preventive maintenance program</p> Signup and view all the answers

    What is a primary use case for wheelbarrows and buggies in concrete construction?

    <p>Short flat hauls on onsite concrete construction</p> Signup and view all the answers

    What is a necessary condition for remixing concrete at a jobsite?

    <p>Water is added without exceeding the specified w/c-ratio</p> Signup and view all the answers

    What is a limitation of agitator trucks in concrete transportation?

    <p>Have higher equipment costs compared to nonagitating trucks</p> Signup and view all the answers

    What is a key consideration for transporting concrete using agitator trucks?

    <p>All of the above</p> Signup and view all the answers

    What is the primary difference between a central-mixed concrete and a shrink-mixed concrete?

    <p>The location where the mixing is completed</p> Signup and view all the answers

    What is the recommended number of revolutions for mixing concrete in a truck mixer according to ASTM C 94?

    <p>70 to 100 revolutions</p> Signup and view all the answers

    What is the purpose of a non-agitating truck in concrete transportation?

    <p>To transport the concrete without agitation</p> Signup and view all the answers

    What is the primary advantage of using a portable batch plant?

    <p>It can be used for intermittent production of concrete at jobsite</p> Signup and view all the answers

    What is the recommended speed for mixing concrete in a truck mixer according to ASTM C 94?

    <p>2 to 6 rpm</p> Signup and view all the answers

    What is the primary difference between a truck mixer and a mobile batcher mixer?

    <p>The purpose of the mixer</p> Signup and view all the answers

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