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Contact with wet concrete can cause skin chemical burns due to the caustic nature of the mixture of cement and water (including rainwater). Indeed, the pH of fresh cement water is highly alkaline due to the presence of free potassium and sodium hydroxides in solution (pH ~ 13.5).
Example of flat piece of concrete having dislodged with corroded rebar underneath, Welland River bridge across Queen Elizabeth Way in Niagara Falls, Ontario. The expansion of the corrosion products (iron oxides) of carbon steel reinforcement structures may induce internal mechanical stress (tensile stress) that cause the formation of cracks and disrupt the concrete structure.
The alkali–silica reaction (ASR), also commonly known as concrete cancer, [3] is a deleterious internal swelling reaction that occurs over time in concrete between the highly alkaline cement paste and the reactive amorphous (i.e., non-crystalline) silica found in many common aggregates, given sufficient moisture.
FJM Concrete Pumping employed the concrete truck driver who struck a Hays school district bus and a passenger vehicle on March 22. ... Burns' office issued a warrant for Martinez in relation to ...
More than 7,500 feet of concrete barriers and more than 6,500 sandbags have been deployed to areas burned in the Palisades Fire in case of debris flows, Los Angeles Mayor Karen Bass announced Tuesday.
In north Altadena, a road near the Eaton Fire burn scar was also submerged by 3 feet (91 centimeters) of mud, vegetation and trees as a flood of water overcame concrete blocks put in place to ...
Chemical burns may occur through direct contact on body surfaces, including skin and eyes, via inhalation, and/or by ingestion. Substances that diffuse efficiently in human tissue, e.g., hydrofluoric acid , sulfur mustard , and dimethyl sulfate , may not react immediately, but instead produce the burns and inflammation hours after the contact.
Land and debris can move easily in burn scars even during short-lived rain events. ... Trees, brush, mud and debris get mixed together to flow like concrete moving at a fast pace downhill. They ...