There’s nothing better than a big glass of water filled with ice on a hot summer day. Concrete may feel the same way, also.
Weather is one of the most important factors during any concrete placement and when placed in hot weather, quality can be greatly diminished if the proper precautions are not taken. The Portland Cement Association estimates that, for every 20 degrees Fahrenheit of increased ambient temperature, the curing time of concrete can be reduced by as much as half. This decreased amount of work-ability time can put stress on a crew to complete the finishing work before it hardens and increase the risk of cracking. The PCA also suggests that steps be taken to reduce hot weather effects when ambient temperatures rise above 77 degrees Fahrenheit and especially after temperatures reach 90 degrees.
One way crews are keeping the temperature of their concrete cooler on hot days is to use ice. In fact, construction crews are using so much ice in Charlotte, North Carolina, that it’s becoming local business Zippy Ice’s fastest growing sector, as well as their highest source of revenue, according to a TWC News story. The ice they produce is 22 degrees, which is sure to be able to bring the temperature of a concrete mix down to more manageable levels. Before dropping chucks of ice into your mix, however, it’s worth noting that ASTM C1602 requires that ice be completely melted by the time mixing is complete. Depending on the amount of ice used and the ambient temperature, it may be better to purchase larger or smaller pieces of ice, or wait until it’s melted before adding it to the mixer. You should also enlist the help of an engineer to help you determine the amount of ice needed.
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I’ve mentioned this several times before, but the single greatest thing technology companies can do for the construction industry is to allow cross-platform integration. That’s essentially what construction is at its core, anyway, a bunch of different entities working together for a common goal. Autodesk’s BIM 360, which already integrates 60+ different softwares into its platform, has recently added NoteVault to its list.
Arizona’s cost of living is 3.5% below the national average, according to MERIC, which helped them jump about 7 spots in the rankings after adjustment. There are two professions ranked in the top 10, including security and fire systems installers at #2 and solar panel installers at #5. The lowest ranked professions in the state are insulation workers at #40 and crane operators at #38.
When we’ve talked about construction robotics in the past, it’s mostly been about really large machines working on exterior structures, like this brick-laying robot, or this self-driving track loader. A technology institute in Japan is busy working towards bringing robotics to the interior finish side of the construction world with the development of a drywall installing robot.
Last week, we shared some newly updated Trenching and Excavation safety information from OSHA, which was part of their priority goals for 2018. Those updates included a public service announcement and updated online resources. The administration has just announced the update of their National Emphasis Program (NEP) on trenching and excavation safety, which features a period of education and prevention outreach.
A construction crane that was working on a highway widening project in St. Martin Parish in Louisiana collapsed onto the adjacent roadway last week, injuring one driver.
The first state to be on the right side of our countdown is the Centennial State: Colorado. It received it’s nickname after becoming an official state 100 years after the Declaration of Independence was signed.
Demolition by implosion videos are always fun to watch. Adding an element of water makes them even more dramatic, though it’s probably not great for the ecosystem. Late last week, a one mile long, 23 year-old bridge in China was imploded in front of a crowd of spectators and caught on camera.
Earlier this year, it was announced that reducing injuries and deaths caused by trenching and excavation collapses would be a priority goal for OSHA in 2018. The administration planned to achieve this through increased inspection rates, public service announcements (PSA), updating online resources, and creating a better public-private partnership. Recently, OSHA made good on their promise to issue PSAs and update their online resources.