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.
For the past few years, tool manufacturers have been making cordless tools possible that no one thought could be done. We now have battery powered table saws, 12” miter saws, even battery powered pipe threaders. But one thing that no one has done yet, until now, is a battery powered worm drive circular saw.
It’s no secret that the construction workforce is dominated by men, but women are slowly increasing their numbers in recent years as gender barriers continue to be knocked down. With construction jobs expected to continue to grow over the next few years, women will play a significant role in filling job openings.
Construction employers are legally responsible for following and enforcing safety regulations on their jobsites. If caught not abiding by these rules and failing to keep workers safe, an OSHA violation and fine can follow. Recently, however, several contractors are also facing criminal charges following employee deaths on their jobsites.
After causing devastation in the Bahamas, Hurricane Dorian worked its way up the U.S. East Coast last week and eventually made its way up to Nova Scotia, Canada as a Category 2 storm. The storm left more than 369,000 without power in the Canadian Region, according to CBC, but also caused a tower crane to buckle and collapse in the city of Halifax.
A little over 3 years ago, reports surfaced that San Francisco’s luxury high rise, the Millennium Tower, has been consistently sinking and tilting since it was completed in 2009. Lawsuits have been underway for years involving dozens of lawyers from many different parties, but an expert panel has just approved a $100 million plan to keep the building from sinking and tilting any further.
If you are looking for the right scaffolding for your construction project, you will need to consider the choice of scaffolding available to you. However, there is one type of scaffolding that is chosen for a number of different projects because of the benefits that come with it. This kind of scaffolding is Mobile Scaffolding and regardless of whether you are working on a roof or working on the brickwork of a building, they are often a great choice.
Unless you work on infrastructure and some other specialty structures, you’ve probably always wondered how underwater structures are built. It’s always admittedly been a bit of a mystery to me, as I only encounter relatively small amounts of water on my retail construction sites. Some dewatering here and there or a small creek relocation can add some difficulty to a project, but they’re manageable.
As large of an industry as the construction industry is and with the amount of characters that I’ve met in my career, I’ve always been surprised at the lack of television programming covering large building projects. The Construction Channel, an online new media company, is taking matters into their own hands and has recently released episodes of a documentary series called “Six Figures, No Suits” (SFNS)
A 2018 trench collapse in Colorado lead to the death of a construction worker named Rosario “Chayo” Martinez-Lopez. Now, his employer faces manslaughter charges for his death.
It’s not often that contractors completely invent a new method of building high rises. We’ve certainly seen some very interesting methods in recent projects, such as the “top-down” method that allows the sub and super-structure to be built at the same time, but a contractor in London has a new way to shave time off of the construction schedule of a high rise building.