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  2. Environmental impact of concrete - Wikipedia

    en.wikipedia.org/wiki/Environmental_impact_of...

    The environmental impact of concrete, its manufacture, and its applications, are complex, driven in part by direct impacts of construction and infrastructure, as well as by CO 2 emissions; between 4-8% of total global CO 2 emissions come from concrete. [1] Many depend on circumstances.

  3. Sustainability reporting - Wikipedia

    en.wikipedia.org/wiki/Sustainability_reporting

    Today, these reports are common: 93% of the world's two hundred and fifty largest companies publish them annually. [19] Indeed, CSR and its concrete implementation are increasingly valued by public opinion. [20] This interest has led to the emergence of reference frameworks, guidelines, standards and regulations in this area.

  4. List of companies and cities in Africa that manufacture cement

    en.wikipedia.org/wiki/List_of_companies_and...

    Egyptian Cement Company recently became Lafarge Cement Egypt with a total production capacity of about 10 million tons of cement coming from five lines designed and manufactured by POLYSIUS FRANCE, LCE arranged as the second plant all over the world on the cement production. Sinai White Cement Portland. Misr-Beni Suef. Misr-Quena.

  5. Limestone Calcined Clay Cement - Wikipedia

    en.wikipedia.org/wiki/Limestone_Calcined_Clay_Cement

    The main components of LC3 cements are clinker, calcined clay, limestone, and gypsum. [24] [25] [26] The fresh concrete production involves synergetic hydration.[10] [27] Adding large amounts of calcined clay and ground limestone to the dry cement powder, [28] [29] when adding water to the mix for making concrete, cement and additives start to hydrate and the soluble aluminates released in ...

  6. Environmental issues in Africa - Wikipedia

    en.wikipedia.org/wiki/Environmental_issues_in_Africa

    Sand and water on the side of the road, causing erosion on the environment Plastic bags dumped by the road side in Katete in mbarara district in western Uganda. The erosion caused by rains, rivers and winds as well as over-use of soils for agriculture and low use of manures have resulted in turning the soils infertile, as for example, in the plains of the Nile and the Orange River.

  7. Cement - Wikipedia

    en.wikipedia.org/wiki/Cement

    Cement manufacture causes environmental impacts at all stages of the process. These include emissions of airborne pollution in the form of dust, gases, noise and vibration when operating machinery and during blasting in quarries, and damage to countryside from quarrying. Equipment to reduce dust emissions during quarrying and manufacture of ...

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  9. Concrete degradation - Wikipedia

    en.wikipedia.org/wiki/Concrete_degradation

    The presence of water is always an aggravating factor. Concrete structures immersed in water as dams and bridge piles are therefore particularly sensitive. These reactions are also characterized by slow reaction kinetics, depending on environmental conditions such as temperature and relative humidity. They develop at a slow rate and may take ...

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