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  • Video 
    Does Rebar Rust?

    Does Rebar Rust?

    While steel reinforcement solves one of concrete’s greatest limitations, it creates an entirely new problem: Corrosion of embedded steel rebar is the most common form of concrete deterioration. There are lots of ways to combat this problem, a few of which we discuss/demonstrate in this video, including fiber reinforced concrete, adequate protective cover, and fiber reinforced polymer bars.

    Subjects:
    Building and Real Estate
    Keywords:
    Protective coatings Reinforced concrete -- Corrosion -- Prevention Reinforcing bars -- Corrosion Fiber-reinforced concrete
    Resource Type:
    Video
     
  • Video 
    Was Roman Concrete Better?

    Was Roman Concrete Better?

    This video discusses a few modern techniques that help improve design life of concrete, including roller compacted concrete (RCC) and water reducing admixtures (superplasticizers). There are a whole host of differences between modern concrete and that of the western Roman empire that I didn’t have time to go into, including freeze/thaw damage.

    Subjects:
    Building and Real Estate
    Keywords:
    Concrete construction Roller compacted concrete Concrete -- Additives Concrete
    Resource Type:
    Video
     
  • Video 
    What is a Hydraulic Jump?

    What is a Hydraulic Jump?

    Engineers need to be able to predict how water will behave in order to design structures that manage or control it. And fluids don’t always behave the way you’d expect. On this episode, we’re talking about one of the most interesting phenomena in open-channel flow: the hydraulic jump.

    Subjects:
    Hydraulic Engineering
    Keywords:
    Hydraulics Hydraulic jump
    Resource Type:
    Video
     
  • Video 
    What is a Weir?

    What is a Weir?

    A weir is a small dam built across a river to control the upstream water level. Weirs have been used for ages to control the flow of water in streams, rivers, and other water bodies. Unlike large dams which create reservoirs, the goal of building a weir across a river isn’t to create storage, but only to gain some control over the water level. Over time, the term weir has taken on a more general definition in engineering to apply to any hydraulic control structure that allows water to flow over its top, often called its crest. In fact, the spillways of many large dams use weirs as control structures. So how do they work?

    Subjects:
    Hydraulic Engineering
    Keywords:
    Dams Hydraulics Weirs
    Resource Type:
    Video
     
  • Video 
    The Most Dangerous Dams

    The Most Dangerous Dams

    Dams serve a wide variety of purposes from hydropower to flood control to storage of water for municipal and industrials uses. But when a dam’s useful purpose fades away, the structure itself still remains. Dams come in all shapes and sizes, but contrary to what you might think, the most dangerous dams are often the smallest, also known as low head dams.

    Subjects:
    Hydraulic Engineering
    Keywords:
    Dam safety Dams Hydraulics
    Resource Type:
    Video
     
  • Video 
    How are Underwater Structures Built?

    How are Underwater Structures Built?

    This video gives a quick overview of how we build underwater structures. Oceans, rivers, and lakes are often beautiful, but they’re not necessarily convenient places to build things. Yet, many types of the infrastructure we depend on every day, including wharves, bridges, and dams, are founded below the water. How do they do it? On this episode, we're talking about different types of underwater construction, including cofferdams, diversions, caissons, and drilled shafts. Whether the construction site is on the bottom of a lake or river, or simply located in the floodplain and only at risk during extreme weather, engineers and construction contractors put a significant amount of thought and consideration into the feasibility and costs of managing this water.

    Subjects:
    Hydraulic Engineering
    Keywords:
    Underwater construction Hydraulic engineering
    Resource Type:
    Video
     
  • Video 
    How Do Traffic Signals Work?

    How Do Traffic Signals Work?

    Traffic management in dense urban areas is an extremely complex problem with a host of conflicting goals and challenges. One of the most fundamental of those challenges happens at an intersection, where multiple streams of traffic - including vehicles, bikes and pedestrians - need to safely, and with any luck, efficiently, cross each others’ paths. However we accommodate it now or in future, traffic will continue to be one of the biggest challenges in our urban areas and traffic signals will continue to be one of its solutions.

    Subjects:
    Transportation
    Keywords:
    Traffic signs signals Roads -- Interchanges intersections Traffic flow
    Resource Type:
    Video
     
  • Video 
    How Do Spillways Work?

    How Do Spillways Work?

    We normally build a dam to hold water back and store it for use in water supply, irrigation, hydropower, or flood control. But sometimes we have to let some water go. Whether we need it downstream or the impounded water behind the dam is simply too full to store any more, nearly every dam needs a spillway to safely discharge water. The spillway is a critical part of any dam and often the most complex component. So how does it work?

    Subjects:
    Hydraulic Engineering
    Keywords:
    Hydraulic structures Spillways Dams Reservoirs Diversion structures (Hydraulic engineering)
    Resource Type:
    Video
     
  • Video 
    How Does the Power Grid Work?

    How Does the Power Grid Work?

    The modern world depends on electricity. It’s a crucial resource, especially in urban areas, but electricity can’t be created, stored, and provided at a later time. The instant it’s produced, it’s used no matter how far apart the producer is from the user. And the infrastructure that makes all this possible is one of humanity’s most important and fascinating engineering achievements: the power grid.

    Subjects:
    Building Services Engineering and Electrical Engineering
    Keywords:
    Electric power distribution
    Resource Type:
    Video
     
  • Video 
    How Electricity Generation Really Works

    How Electricity Generation Really Works

    This video continues the series on the power grid by diving deeper into the engineering of large-scale electricity generation. The importance of electricity in our modern world can hardly be overstated. What was a luxury a hundred years ago is now a critical component to the safety, prosperity, and well-being of nearly everyone. Generation is the first step electricity takes on its journey through the power grid, the gigantic machine that delivers energy to millions of people day in and day out. So how does it work?

    Subjects:
    Building Services Engineering and Electrical Engineering
    Keywords:
    Electric power production
    Resource Type:
    Video