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  2. Concrete recycling - Wikipedia

    en.wikipedia.org/wiki/Concrete_recycling

    Concrete waste that is rich in alkaline calcium compounds can be used to remove and recover various elements from an aqueous solution. Waste concrete has been used as a sorbent to remove phosphorus from wastewater after the removal of excess sludge in sewage treatment plants. [27] Concrete waste may also be used as an inexpensive gas treatment ...

  3. McGregor, Iowa - Wikipedia

    en.wikipedia.org/wiki/McGregor,_Iowa

    McGregor is a city in Clayton County, Iowa, United States. The population was 742 at the time of the 2020 census. [2] McGregor is located on the Mississippi River across from Prairie du Chien, Wisconsin. Pike's Peak State Park is located just south of the city. Just to the north of McGregor is the city of Marquette.

  4. Marquette, Iowa - Wikipedia

    en.wikipedia.org/wiki/Marquette,_Iowa

    Marquette is a city in Clayton County, Iowa, United States. The population was 429 at the time of the 2020 census , up from 421 in 2000. [ 2 ] The city, which is located on the Mississippi River , is named after Jesuit missionary Jacques Marquette , who along with Louis Joliet discovered the Mississippi River just southeast of the city on June ...

  5. Marquette Cement Manufacturing Company - Wikipedia

    en.wikipedia.org/wiki/Marquette_Cement...

    Marquette Cement was founded in 1898 in Chicago, Illinois. In 1972, James E. Poole was named president and chief executive officer of the company by its directors. [ 1 ] Marquette Cement moved its headquarters to Nashville , Tennessee in 1974, [ 2 ] and two years later it was acquired by Gulf and Western Industries , becoming part of the Gulf ...

  6. Concrete degradation - Wikipedia

    en.wikipedia.org/wiki/Concrete_degradation

    Degraded concrete and rusted, exposed reinforcement bar (rebar) on Welland River bridge of the Queen Elizabeth Way in Niagara Falls, Ontario. Concrete degradation may have many different causes. Concrete is mostly damaged by the corrosion of reinforcement bars due to the carbonatation of hardened cement paste or chloride attack under wet ...

  7. Sulfate attack in concrete and mortar - Wikipedia

    en.wikipedia.org/wiki/Sulfate_attack_in_concrete...

    A fairly well-defined reaction front can often be observed in thin sections; ahead of the front the concrete is normal, or near normal. Behind the reaction front, the composition and the microstructure of concrete are modified. These changes may vary in type or severity but commonly include: Extensive cracking; Expansion

  8. U.S. Route 18 in Iowa - Wikipedia

    en.wikipedia.org/wiki/U.S._Route_18_in_Iowa

    The first car to cross the bridges did so on March 7, 1932. Users of the bridge had to pay a toll until July 15, 1954. The bridges remained in use for another 20 years, when they were replaced by the Marquette–Joliet Bridge. [13] In 1988–1989, a bypass was built around McGregor so US 18 could connect directly to the Marquette–Joliet ...

  9. United Building & Construction Trades Council v. Mayor and Council of Camden, 465 U.S. 208 (1984), was a case in which the Supreme Court of the United States held that a city can pressure private employers to hire city residents, but the same exercise of power to bias private contractors against out-of-state residents may be called into account under the Privileges and Immunities Clause of ...