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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 ...
Chicago Tonight is a television news program broadcast weeknights on WTTW in Chicago, United States.It reports primarily on local politics, education, business, culture, science, and health, with a mix of in-studio panel discussions, one-on-one interviews, and short documentary-style packages.
The New York City School Construction Authority is considering breaking ground on a new elementary school in Brooklyn – across the street from a state Superfund site with a history of ...
Why are seasonal allergies so bad in Sacramento right now? Kim: “Part of it is the wind. Also the great rain, it’s fantastic for things to bloom and we need it so much, but when that happens ...
😈Describe what you’re “doing” right now. “I’m lying in bed naked.” “I’m touching myself.” “I’m so hard right now, thinking about you.” 😛Describe what you want to do ...
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 ...
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.