OSHA has had numerous recent rulings and interpretations that have been good for our industry. Just yesterday, they announced further clarification on a COVID interpretation that was released earlier this year. In the earlier interpretation, they stated that if you wrote down temperatures of employees while screening for the day that you needed to keep them for 30 years. In addition, they also stated that any screening paperwork asking about COVID symptoms would also need to be kept for 30 years. The MCAA, through our coalition (Construction Industry Safety Coalition), asked for OSHA to reconsider and to further clarify their ruling (click here to read the letter).
Reade more: https://www.masoncontractors.org/2020/06/19/new-osha-clarifications-impact-the-masonry-industry/?utm_source=Masonry%20Messenger&utm_medium=Masonry%20Messenger&utm_campaign=Masonry%20Messenger&_zs=XWnRX&_zl=xV092#newsletter
Around three billion tons of cement are produced around the world each year (Guillaume, 2014), of which the majority is consumed in developing countries due to ceaselessly growing demand, attributed to their emerging economies.
In addition to the construction activities, natural disasters such as earthquakes and wars lead to the destruction of many infrastructures, increasing the constant demand for cement and cement-based materials such as mortar and concrete.
Mortar is cement mixed with fine sand, water and lime to improve the durability of the product. It is generally used as a paste that holds together other common materials of masonry construction, including bricks, concrete blocks and stone.
Although mortar has many advantages, it is less resistant to earthquakes, brittle, and has low tensile strength. These drawbacks have led scientists to investigate multiple alternative solutions, including the use of nanoparticles.
Read more: https://www.azonano.com/article.aspx?ArticleID=5506
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