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California passed a law in 2021 that requires the state’s Air Resources Board to develop a strategy for the state’s cement industry to reduce its greenhouse gas emissions by 40% by 2035 and ...
The cement plant at the quarry has been fueled by petroleum coke since 2007, the latter (along with the limestone itself) is a major source of mercury emissions. The cement plant was responsible for 29 percent of total Bay Area airborne mercury emissions and was shown to impact a rural site, Calero Reservoir, 20 miles (32 km) away. [86]
The speaker of the California State Assembly presides over the State Assembly. The lieutenant governor is the ex officio president of the Senate and may break a tied vote, and the president pro tempore of the California State Senate is elected by the majority party caucus. The Legislature meets in the California State Capitol in Sacramento.
Cement manufacture is a source of the following airborne contaminants: particulate matter, nitrogen oxides, sulfur dioxide, carbon monoxide, and carbon dioxide. [3] Cement production releases carbon dioxide by sintering limestone or shells. It is also very energy-intensive, with the result that the cement industry is a large emitter of carbon ...
Some jurisdictions including Vancouver, British Columbia have building standards that encourage lower-carbon concrete. California passed a law in 2021 that requires the state’s Air Resources Board to develop a strategy for the state’s cement industry to reduce its greenhouse gas emissions by 40% by 2035 and achieve net zero by 2045.
Concrete has a very low coefficient of thermal expansion, and as it matures concrete shrinks. All concrete structures will crack to some extent, due to shrinkage and tension. Concrete which is subjected to long-duration forces is prone to creep. The density of concrete varies, but is around 2,400 kilograms per cubic metre (150 lb/cu ft). [1]
Combinations of economic and technical aspects and, increasingly, environmental concerns have made so-called blended cements, i.e., cements that contain considerable amounts of supplementary cementitious materials (mostly around 20% by weight, but over 80% by weight in Portland blast-furnace slag cement), the most widely produced and used ...
California state government's bank account has dwindled from a nearly $100-billion surplus 18 months ago to a projected $68-billion deficit. Column: Sacramento politicians need the guts to fix ...