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Concrete dust released by building demolition and natural disasters can be a major source of dangerous air pollution. The presence of some substances in concrete, including useful and unwanted additives, can cause health concerns due to toxicity and (usually naturally occurring) radioactivity . [ 4 ]
Concrete degradation may have many ... It is a surreptitious and dangerous form of localized corrosion because the rebar sections can be decreased to the point that ...
The building would be an open structure of solid granite or concrete, measuring 40 by 32 by 10 feet (12.2 m × 9.8 m × 3.0 m), and contain Level IV messages. The plans included a suggestion that the building be designed so as to create a "dissonant and mournful" whistling sound when wind blew through it, acting as a Level I message.
G&B Construction: “Why you should Never use Salt on Concrete in Winter” 11 Ice Scrapers With Nearly Perfect Customer Reviews. Here’s Why Light Snow Is Just as Dangerous as a Snowstorm.
The 2023 United Kingdom reinforced autoclaved aerated concrete crisis relates to increased safety concerns over reinforced autoclaved aerated concrete, commonly used historically in roofing and wall construction within the public sector, having gained popularity in the mid-1950s as a cheaper and more lightweight alternative to conventional reinforced concrete.
A fairly well-defined reaction front can often be observed in thin sections; ahead of the front the concrete is normal, or near normal. Behind the reaction front, the composition and the microstructure of concrete are modified. These changes may vary in type or severity but commonly include: Extensive cracking; Expansion
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Concrete waste that is rich in alkaline calcium compounds can be used to remove and recover various elements from an aqueous solution. Waste concrete has been used as a sorbent to remove phosphorus from wastewater after the removal of excess sludge in sewage treatment plants. [26] Concrete waste may also be used as an inexpensive gas treatment ...