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However, concrete itself may be damaged by fire, with one notable example being the 1996 Channel Tunnel fire where fire damage extended along several hundred meters of the tunnel's length. For this reason, common fire testing standards, such as ASTM E119, [ 21 ] do not permit fire testing of cementitious products unless the relative humidity ...
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]
ASTM C1293: "Test Method for Concrete Aggregates by Determination of Length Change of Concrete Due to Alkali-Silica Reaction". It is a long-term confirmation test (1 or 2 years) at 38 °C in a water-saturated moist atmosphere (inside a thermostated oven) with concrete prisms containing the aggregates to be characterised mixed with a high-alkali ...
A 21-story skyscraper in Louisiana, abandoned for almost four years, was demolished over the weekend after it was damaged beyond repair by multiple hurricanes which passed through the region ...
Concrete is used to create hard surfaces that contribute to surface runoff, which can cause heavy soil erosion, water pollution, and flooding, but conversely can be used to divert, dam, and control flooding. Concrete dust released by building demolition and natural disasters can be a major source of dangerous air pollution.
Concrete sealers are applied to concrete to protect it from surface damage, corrosion, and staining. They either block the pores in the concrete to reduce absorption of water and salts or form an impermeable layer which prevents such materials from passing.
Concrete from a joint in Boston’s Prudential Tunnel collapsed on Friday, causing damage to vehicles. Despite the event there were no reported injuries according to Massachusetts transportation ...
The dust from the collapsed towers was "wildly toxic", according to air pollution expert and University of California Davis Professor Emeritus Thomas Cahill. [6] Much of the thousands of tons of debris resulting from the collapse of the Twin Towers was pulverized concrete, which is known to cause silicosis upon inhalation.