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.
One of the best parts (for me, anyway) of large developments that cost hundreds of millions of dollars being built is being able to learn about different construction methods that can reduce costs or deliver the project sooner than traditional methods. The Crown Sydney, a future 890 foot tall tower in Australia, is using a method called “top down construction” to shorten their project schedule and avoid additional hazards on the $740 million project.
If not for having the lowest cost of living in the country, according to the MERIC data, MIssissippi would be in contention for the lowest ranking on our list. However, having a 14.5% lower than the national average boosted the state up 15 spots to #35 after adjustment.
In January of 2018, ten construction workers were killed and another eight were injured when a bridge spanning the Chirajara canyon in Columbia partially collapsed. That collapse has since been blamed on a poor design, reports have stated. Last week, the remaining sections of the bridge were demolished in dramatic fashion.
A 47 year old crane operator is facing charges of driving while intoxicated and leaving the scene of an accident after driving a truck mounted crane into several vehicles on the Long Island Expressway in New York.
OSHA's new crystalline silica dust exposure regulations officially went into effect on September 23, 2017. Over the past 10 months, there has been plenty of confusion about the lung disease causing material. In the first 6 months after the effective date, OSHA's inspectors yielded 116 violations across the country.
Vermont is one of the few states in the Northeast that doesn't have a ridiculously high cost of living, according to MERIC, at only 2.9% higher than the national average. That helped Vermont rank higher than many others in the Northeast in this list, but it's lower than average adjusted hourly rates for the construction industry still kept it on the bottom half of the list overall.
A couple weeks ago, we shared a list of the 100 tallest buildings to ever be demolished. One of the most interesting things that I learned while researching for that article was that although Detroit’s Greater Department Hudson Store was not the tallest building on the list (it was #21), it was the tallest on the list to actually be imploded.
Since the dawn of green buildings, these projects have always been synonymous with LEED certification. The process of obtaining that LEED certification has not always been an easy one for contractors; there is a ton of paperwork and documentation that needs to take place in order to prove all LEED credits have been rightfully earned. A new construction standard, called BREEAM, is hoping to disrupt the United States’ green building certification world with its impending New Construction Standard Release in 2019.
Whether you’re looking to begin using software for the first time or update your current system, here are some ways that software can help improve your company in 2018: