Editing Concrete (section)

===Health and safety===
{{see also|Occupational dust exposure#Construction}}
[[File:Dust emission when using electrical power tools.webm|thumb|upright=0.83|[[Concrete dust]] emission from the use of power tool]]
[[File:Crushed Concrete Granular Fill.jpg|thumb|Recycled crushed concrete, to be reused as granular fill, is loaded into a semi-dump truck]]

Grinding of concrete can produce [[hazardous dust]]. Exposure to cement dust can lead to issues such as [[silicosis]], kidney disease, skin irritation and similar effects. The U.S. [[National Institute for Occupational Safety and Health]] in the United States recommends attaching local exhaust ventilation shrouds to electric concrete grinders to control the spread of this dust. In addition, the [[Occupational Safety and Health Administration]] (OSHA) has placed more stringent regulations on companies whose workers regularly come into contact with silica dust. An updated silica rule, which OSHA put into effect 23 September 2017 for construction companies, restricted the amount of breathable crystalline silica workers could legally come into contact with to 50 micro grams per cubic meter of air per 8-hour workday. That same rule went into effect 23 June 2018 for general industry, [[hydraulic fracturing]] and maritime. That deadline was extended to 23 June 2021 for engineering controls in the hydraulic fracturing industry. Companies which fail to meet the tightened safety regulations can face financial charges and extensive penalties. The presence of some substances in concrete, including useful and unwanted additives, can cause health concerns due to toxicity and radioactivity. Fresh concrete (before curing is complete) is highly alkaline and must be handled with proper protective equipment.