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Today’s post is a few images of the process of paving the roadway on the new section of Southbound I-65 here in Louisville. In the process of constructing the new downtown bridge there are over 200 additional spans that are being built as the highway passes through Louisville. The photos here are part of the paving of just one of those spans.
The first photo was taken around 4:00 AM while the paving machine was at rest. I think the paving machine is known as a Bidwell Machine because that is who manufactures them. I heard several Operating Engineers refer to it as the “Bidwell” which is why I think I’m correct in calling it that. At any rate this machine spreads and finishes the concrete after the laborers have placed it on the deck using a large hose and a concrete pump to raise it from ground level below the roadway onto the new roadway.
The crew was waiting for the concrete that was being pumped to be certified that it was the correct composition and consistency for use. While that testing process was taking place the leading edge of the fresh concrete already in place was covered with burlap blankets and kept wet so that there wouldn’t be a problem when the pouring resumed. The men on the left side of the image are the quality inspectors and work for the Kentucky Department of Transportation. It is their job to verify that all concrete and construction materials and processes are within the specifications required for proper and safe construction of the roadway.
Very often when we laymen see a construction site we may think that folks are standing around doing nothing. The reality is that there are many facets to a construction project that temporarily halt work but everyone we see is an integral part of the process. I like to think of it as similar to a football game. The team is simply waiting for the ball to be snapped and then everyone has a role to play in an effort to complete the play. In this case the ball is waiting for the officials to place it on the scrimmage line and blow the whistle for the game to resume.
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THis image shows the concrete pump boom that is used to place the concrete on the roadway. In the lower right side you can see two concrete trucks positioned to feed wet concrete into the hopper on the pump. The pump operator then delivers the wet mix through the boom and hose to another operator on top who actually directs the placing of the boom using a joy stick apparatus that he wears on his shoulders. Finally there is a laborer who is aiming the snorkel on the end of the hose to place the concrete where it needs to be.
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This image shows the concrete pump and the two concrete delivery truck that are required to feed it. These truck are just two of many that were delivering concrete to the pump that morning. As soon as they had offloaded their concrete another pair replaced them; this went on for hours as truck after truck delivered more material. In this case there were over 50 loads of concrete delivered just to pour one span of the new roadway.
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As you can see by this image the sun has started to rise and the concrete pour has progressed further south. I couldn’t hear what was being said but clearly this was a moment when people were learning what the next actions they needed to take would be once the next batch of concrete started flowing from the concrete pump.
