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One reason why the carbon emissions are so high is because cement has to be heated to very high temperatures in order for clinker to form. A major culprit of this is alite (Ca 3 SiO 5), a mineral in concrete that cures within hours of pouring and is therefore responsible for much of its initial strength. However, alite also has to be heated to ...
The mono-sulfate (AFm) now more soluble at low temperature slowly dissolves to recrystallize as the less soluble ettringite (AFt). AFt crystal structure hosts more water molecules than AFm. So, AFt has a higher molar volume than AFm because of its 32 H 2 O molecules. During months, or years, after young concrete cooling, AFt crystallizes very ...
The City of Chicago then gave permission to install the new pilings 3.5 feet (1.1 m) south of the old pilings. The crew members who began work at the site did not know that beneath the river was an abandoned Chicago Tunnel Company (CTC) tunnel that had been used in the early 20th century to transport coal and goods. One of the pilings on the ...
"But not only that, now he wants to protect these illegals that are here in Chicago, Ill., illegally, and I just don't believe that's the right thing to do as a mayor when you have a 14% approval ...
Chicago taxpayers are looking at a billion-dollar deficit after elected officials raised the budget from $16.6 billion this year to $17.1 billion for 2025. ... That payment is now going to cost us ...
The reelection of Donald Trump as president of the United States promises great changes in the coming new year. However, there are politicians who have chosen to resist Trump and his administration.
The Chicago Tribune made the point that "Quinn championed the right-to-know law while he was lieutenant governor." [22] As of January 17, 2009, Illinois Governor Quinn has not made this report public. Quinn said if village officials didn't comply with an order not to use the well "they're going to suffer serious consequences." [23]
"Bubbly Creek" is an arm of the Chicago River, and forms the southern boundary of the Union Stock Yards; all the drainage of the square mile of packing-houses empties into it so that it is really a great open sewer a hundred or two feet wide. One long arm of it is blind, and the filth stays there forever and a day.