Thursday, November 26, 2009
Sunday, November 22, 2009
Monday, November 9, 2009
Here is the rig. A mixer dumps its load into the hopper of the pumper. The pumper pumps it through the 2-inch line to the men at the pour. The pump operator has a remote control that controls the flow. He stays with the concrete men and pumps when they call for more and turns it off when they say. Neat. Pumping two mixers full of concrete took about 3 hours. The pump operator said he could pump that amount in 30 minutes if they didn't need him to stop. Fun.
Since the site sits on top of hill, there is no way to get a concrete truck in there to pour. We had to hire a concrete pumper to pump all 17 yards of concrete up the hill. Due to the power lines, we could not hire a boom truck. And, since we needed to be able to move the nozzle around the pour, we hired a grout pumper with a 2-inch line. A 4-inch would be too heavy for the men to move around. In order to pump concrete through a 2-inch line, you have to get smaller aggregate. The smaller aggregate costs a bit more per yard.
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