Tag: concrete

Concrete Supply Plus April 2023

Posted on by Nanette

A housing complex outside Paris is touted as the world’s first fully recycled concrete building

Holcim, a Swiss provider of sustainable building solutions, has developed a concrete made with recycled construction and demolition waste, recycled wastewater, and rainwater.

https://www.bdcnetwork.com/housing-complex-outside-paris-touted-worlds-first-fully-recycled-concrete-building

Construction Humor for the week…

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NYC Awards $2.95B Borough-Based Jail Contract

At the beginning of the month, civil, building and specialty construction company Tutor Perini Corporation reported that it was awarded a design-build contract for the New York City Borough-Based Jails System.

The contract, valued at approximately $2.95 billion by the New York City Department of Design and Construction, is specifically for the Brooklyn Facility. Four new borough jails are slated to replace the aging facilities on Rikers Island, which will close permanently in 2027.

Design work is expected to commence following the receipt of a Notice to Proceed, which the company anticipates in June of this year.

https://www.paintsquare.com/news/view/?26417

Sandbaggy Rebar Mushroom Safety Caps | for Rebar #3 to #8 | Concrete Stakes | T-Posts Caps | Reusable Multiple Times | Bright OSHA Orange Color | Provides Protection from Exposed Rebar (500)https://www.amazon.com/Sandbaggy-Mushroom-Concrete-Reusable-Protection/dp/B09JLM5PLY

Concrete Supply Plus January Week 2023 # 2

Posted on by Nanette

Scientists chip away at how ancient Roman concrete stood test of time

Roman concrete contains white bits called “lime clasts,” remnants of the lime used in the concrete. These features, the researchers said, appear to have resulted from a process called “hot mixing” that employs a lime variant called quicklime that reacts with water to heat the mortar mix and fosters beneficial chemistries that otherwise would not occur.

“Essentially it works like this: when concrete cracks, water or moisture enters and the crack widens and spreads throughout the structure. The lime clasts dissolve with the infiltration of water and provide calcium ions that recrystallize and repair the cracks. Additionally, the calcium ions can react with volcanic ingredients to reinforce the structure,” Masic said.

Masic is a co-founder of a company called DMAT, based in the United States and Italy, that is commercializing concrete inspired by the ancient Roman version.

https://www.reuters.com/lifestyle/science/scientists-chip-away-how-ancient-roman-concrete-stood-test-time-2023-01-09/?

BASF has broken ground on the third and final phase of the methylene diphenyl diisocyanate (MDI) expansion project at its Verbund site in Geismar, Louisiana, announced in July 2022. The company will increase production capacity to approximately 600,000 metric tons per year by the middle of the decade to support the ongoing growth of its North American MDI customers.

https://www.ien.com/operations/news/22644490/basf-breaks-ground-on-780m-expansion-in-louisiana?__lt

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New, rugged ergonomically designed enclosure.

Non-destructive in operation with no need to probe, drill or mechanically damage the surface.

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