Residents living near a Jersey City, New Jersey construction site were frightened as they watched “explosions” of smoke coming out of holes in the ground.
In order to break up some rock in the subgrade, contractors used a chemical called Da-Mite, according to NJ.com, which is a non-explosive rock splitting mortar. Holes are drilled into the rock, the chemical is then poured into the holes, and the mortar then expands with a force of around 18,000psi, causing the rock to break apart, according to the manufacturer’s website.
City spokesperson Jennifer Morrill told NJ.com that the chemical was not approved by the city’s Building Department. Jersey City Fire Chief also told them that he believes the explosions happened because they reacted with the air temperature “in a way it wasn’t supposed to.”
The explosions of smoke continued for around two hours and McGill said that some windows were cracked by flying rock.
A representative from the general contractor explained to NJ.com that the puffs of dust coming out of the holes is “completely normal” and does not agree that any windows were broken by the reaction. The site was shut down earlier in the day due to haphazard jackhammering that “failed to protect neighboring property,” according to Morrill.
On Daigh Company, Inc.’s website, the maker of Da-Mite, they include a note at the bottom of their “how to use” page, which states:
“Let Drilled Holes Cool Off before placing Dā-mite® in them. Cover the area with a tarp or other device after loading with Dā-mite® to minimize effect of blowouts. Also cover in case of rain to keep product dry until after Dā-mite®'s chemical reaction is complete.”
Below is a video of one of the “explosions”, uploaded to Youtube by NJ.com
Full Story: 'Explosions' rock Jersey City construction site | NJ.com
As a storm blew through the Dallas, Texas area on Sunday afternoon, a tower crane standing near an occupied apartment building collapsed causing at least one fatality and 6 injuries.
Completed in 1976, the CN Tower in Toronto, Canada held the record for the tallest freestanding structure in the world from 1975-2007, until it was supplanted by Dubai’s Burj Khalifa. At its highest point, the CN Tower, which is mainly used as a communications and observation tower, reaches 1,815.4 feet (533.33m). Last year, the tower underwent a $16 million renovation and Priestly Demolition shared a fascinating, in-depth video for how they took care of the demolition of the interior space and walls.
Cranes collapsing on-site are serious business, especially since many of them resulted in the loss of life. A recent crane collapse on a construction site in Alpharetta, GA was caught on camera after it caught fire, but luckily no one was injured.
There are a lot of different specialty construction contracting sectors within the industry and cruise ships are definitely one of them. There are plenty of unique challenges when dealing with a moving ship versus a static building. A recent accident highlighted the challenges when a crane collapsed on a cruise ship under renovations, injuring 8 people.
Demolitions by implosion can be fun to watch when they go right – or wrong – but nearby residents can be greatly affected by the high powered blasts and huge clouds of debris that follow. A few years ago, a botched demolition in England left dozens of nearby residents unable to return to their homes for several days. Last week, an obsolete Steel Basic Oxygen Plant in Weirton, West Virginia is leaving residents in a similar situation.
Over the years, Liebherr, the German Crane Manufacturer, has given us some absolutely amazing videos. For example, they put on a show for their best customers one year and lifted one crane with another crane, which was lifted by a third crane, which was then lifted by a fourth crane. Another video highlighted the 58 cranes that were on site at the same time at the world’s largest airport build in Istanbul. Well, the company is back at it again, this time on top of Europe’s new tallest building.
As you may already know, the NBA’s Milwaukee Bucks officially opened their new home, the Fiserv Forum, for the 2018-2019 NBA season last October. That new stadium is being heralded as the “World’s First Bird Friendly Arena,” due to many of the design features. Well, since the new one is open, we can only expect that the old, non-bird friendly (I’m assuming) arena has overstayed its welcome and has to go.
Let’s get 2019 started with the first building demolition by implosion of the year.