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  • Environmental impact of concrete - Wikipedia

    OverviewDesign improvementsCarbon dioxide emissions and climate changeSurface runoffUrban heatConcrete dustToxic and radioactive contaminationHandling precautions

    There is a growing interest in reducing carbon emissions related to concrete from both the academic and industrial sectors, especially with the possibility of future carbon tax implementation. Several approaches to reducing emissions have been suggested. 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 (Ca3SiO5), a mineral in concrete that cures within hours of pouring and is therefore responsible for much of its initial strength. H

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    There is a growing interest in reducing carbon emissions related to concrete from both the academic and industrial sectors, especially with the possibility of future carbon tax implementation. Several approaches to reducing emissions have been suggested. 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 (Ca3SiO5), 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 1,500 °C in the clinker-forming process. Some research suggests that alite can be replaced by a different mineral, such as belite (Ca2SiO4). Belite is also a mineral already used in concrete. It has a roasting temperature of 1,200 °C, which is significantly lower than that of alite. Furthermore, belite is actually stronger once concrete cures. However, belite takes on the order of days or months to set completely, which leaves concrete weak for longer. Current research is focusing on finding possible impurity additives, like magnesium, that might speed up the curing process. It is also worthwhile to consider that belite takes more energy to grind, which may make its full life of impact similar to or even higher than alite. Another approach has been the partial replacement of conventional clinker with such alternatives as fly ash, bottom ash, and slag, all of which are by-products of other industries that would otherwise end up in landfills. Fly ash and bottom ash come from thermoelectric power plants, while slag is a waste from blast furnaces in the ironworks industry. These materials are slowly gaining popularity as additives, especially since they can potentially increase strength, decrease density, and prolong durability of concrete. The main obstacle to wider implementation of fly ash and slag may be largely due to the risk of constru

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  • The Environmental Impacts of Concrete - GreenSpec

    Cement and Global WarmingConcrete Raw Materials Extraction and ProcessingMore About Concrete• Making cement results in high levels of CO2 output.• Cement production is the third ranking producer of anthropogenic (man-made) CO2 in the world after transport and energy generation.• 4 - 5% of the worldwide total of CO2 emissions is caused by cement production.• CO2 is produced at two points during cement production :- the first is as a byproduct of burning of fossil fuels, primarily coal, to generate the heat necessary to drive the cement-making process- the second from the thermal deco...
  • Cement Manufacturing Enforcement Initiative US EPA

    The cement manufacturing industry was an EPA New Source Review/Prevention of Significant Deterioration (NSR/PSD) national enforcement initiative in fiscal years 2008-2010 and was continued as a Reducing Air Pollution from the Largest Sources national enforcement initiative for fiscal years 2011-2013. The cement sector is the third largest industrial source of pollution, emitting more than ...

  • Concrete: the most destructive material on Earth US news ...

    Feb 25, 2019  Taking in all stages of production, concrete is said to be responsible for 4-8% of the world’s CO2. Among materials, only coal, oil and gas are a greater source of greenhouse gases.

  • Cement and Concrete: Environmental Considerations ...

    Cement and Concrete ProductionRaw Material UseEnergyCacoWater PollutionHealth ConcernsCement is the key ingredient in concrete products. Comprising roughly 12% of the average residential-grade ready mix concrete, cement is the binding agent that holds sand and other aggregates together in a hard, stone-like mass. Portland cement accounts for about 95% of the cement produced in North America. It was patented in England by Joseph Aspdin in 1824 and named after a quarried stone it resembled from the Isle of Portland. Cement production requires a source of calcium (usually limesto...
  • Emissions from the Cement Industry

    UseConstructionBenefitsEffectsCausesCriticismsAdvantagesConcrete is used globally to build buildings, bridges, roads, runways, sidewalks, and dams. Cement is indispensable for construction activity, so it is tightly linked to the global economy. Its production is growing by 2.5 percent annually, and is expected to rise from 2.55 billion tons in 2006 to 3.7-4.4 billion tons by 2050.在blogs.ei.columbia.edu上查看更多信息
  • Concrete solutions that lower both emissions and air pollution

    Mar 23, 2020  The scientists also compared several GHG-reduction strategies to determine which are most likely to lower both global emissions and local air pollution related to concrete production.

  • Cleaner concrete production could cut air pollution by 14% ...

    Concrete production is responsible for 8% of global greenhouse gas emissions, and as populations continue to grow, demand for concrete continues to rise. The production of concrete is also a major contributor to local air pollution. The dust produced from mixing the concrete and the trucks that ferry the materials between building sites are ...

  • How much pollution does cement really produce? Is there a ...

    This powder material, called clinker, is mixed together with other materials to create concrete. Despite its inexpensive and readily available supply, cement production is responsible for high levels of carbon dioxide emissions surpassing the emissions produced from trucks.

  • How much pollution does cement really produce? Is there a ...

    This powder material, called clinker, is mixed together with other materials to create concrete. Despite its inexpensive and readily available supply, cement production is responsible for high levels of carbon dioxide emissions surpassing the emissions produced from trucks.

  • The massive CO2 emitter you may not know about - BBC News

    Dec 17, 2018  Not only does the production of Portland cement involve quarrying - causing airborne pollution in the form of dust - it also requires the use of massive

  • How concrete production can help or hurt our environment ...

    Some strategies for cutting greenhouse gas output from concrete production could, under some scenarios, increase local air pollution and related health damage, research finds.

  • Cement Industry Is at Center of Climate Change Debate ...

    Oct 26, 2007  So when Western companies revamp Eastern factories, the emissions decrease for each ton of concrete produced. But the amount of cement produced often goes way up, as does the total pollution ...

  • Cement Produces More Pollution Than All ... - Bloomberg

    Jun 23, 2019  About two-thirds of the polluting gases that come from cement production stem from burning limestone. Kilns are heated to more than 1,400 degrees Celsius (2,600 Fahrenheit), about four

  • Concrete Solutions That Lower Both Emissions and Air Pollution

    Concrete production contributes 8 percent of global greenhouse gases, and demand continues to rise as populations and incomes grow. Yet some commonly discussed strategies to reduce the sector’s global GHG emissions could, under some scenarios, increase local air pollution and related health damages, according to a study from the University of ...

  • How Concrete Can Help Reduce Air Pollution Giatec ...

    Jul 26, 2017  How Advancements and Smart Technology Can Help Reduce Air Pollution . Sulfur Dioxide Reduction. Researchers at Stony Brook University revealed that sulfur dioxide is removed from the air by concrete surfaces. Elements present in concrete interact with and eliminate sulfur and nitrogen oxides present in the air.

  • The Problem With Concrete - YouTube

    Mar 01, 2019  This video is in partnership with Bill and Melinda Gates. You can check out the Gates Annual Letter here: https://b-gat.es/2GxIwba Concrete is responsible for 8% of humanity’s carbon emissions ...

  • 作者: MinuteEarth
  • Cement and CO2 Emissions - Rammed Earth

    However there is a confusion between rammed earth, a mix of clay, sand and stones, and dry pack concrete, too often called stabilised rammed earth. For this reason some discussion about cement, what it is and it's emissions are discussed below. 2015 saw cement production globally at 4.2 billion tonnes.

  • A surprising contributor to climate change: concrete ...

    Oct 21, 2014  Concrete is the most common man-made material on earth. So if its CO2 emissions could be reduced by even a tiny fraction, the environmental impact would be huge.

  • How Does Construction Impact the Environment? GoContractor

    Jun 21, 2017  Additionally, research by Kleiwerks says that building material, such as concrete, aluminum, and steel, are directly responsible for “large quantities of CO2 emissions” due to high contents of “embodied energy content”, with 9.8 million tons of CO2 generated from the production of “76 million tons of finished concrete in the US.”

  • Carbon Footprint of Concrete The Green Ration Book

    “The resource use for concrete was about double that for steel. Both produced high levels of carbon dioxide, but the amount for concrete was quite similar to the amount for steel. The water pollution index for concrete was about half that for steel. The air pollution

  • Concrete Solutions That Lower Both Emissions and Air Pollution

    Mar 23, 2020  Concrete production contributes 8 percent of global greenhouse gases, and demand continues to rise as populations and incomes grow. Yet some commonly discussed strategies to reduce the sector’s global GHG emissions could, under some scenarios, increase local air pollution and related health damages, according to a study from the University of California, Davis.

  • Concrete is tipping us into climate catastrophe. It's ...

    Feb 25, 2019  Nearly 6% of all UK greenhouse gas emissions, and up to 8% of the world’s, are now sourced from cement production. If it were a country, the

  • How Does Construction Impact the Environment? GoContractor

    Jun 21, 2017  Additionally, research by Kleiwerks says that building material, such as concrete, aluminum, and steel, are directly responsible for “large quantities of CO2 emissions” due to high contents of “embodied energy content”, with 9.8 million tons of CO2 generated from the production of “76 million tons of finished concrete in the US.”

  • Carbon Footprint of Concrete The Green Ration Book

    “The resource use for concrete was about double that for steel. Both produced high levels of carbon dioxide, but the amount for concrete was quite similar to the amount for steel. The water pollution index for concrete was about half that for steel. The air pollution

  • Concrete Solutions That Lower Both Emissions and Air Pollution

    Mar 23, 2020  Concrete production contributes 8 percent of global greenhouse gases, and demand continues to rise as populations and incomes grow. Yet some commonly discussed strategies to reduce the sector’s global GHG emissions could, under some scenarios, increase local air pollution and related health damages, according to a study from the University of California, Davis.

  • Concrete is tipping us into climate catastrophe. It's ...

    Feb 25, 2019  Nearly 6% of all UK greenhouse gas emissions, and up to 8% of the world’s, are now sourced from cement production. If it were a country, the

  • QA: Why cement emissions matter for climate change ...

    A builder directs wet concrete from a cement truck into the foundations of a large building. Credit: Peter Righteous/Alamy Stock Photo. If the cement industry were a country, it would be the third largest emitter in the world. In 2015, it generated around 2.8bn tonnes of CO2, equivalent to 8% of the global total – a greater share than any ...

  • Concrete solutions that lower both emissions and air pollution

    Some common strategies to reduce the greenhouse gas emissions of concrete production could have unintended consequences for local air pollution and related health damages, according to a new study.

  • Concrete solutions that lower both emissions and air pollution

    Mar 23, 2020  Cement production is responsible for about half of the total climate (32%) and health (18%) damages of making concrete. That is followed by aggregate production

  • Precast Concrete Manufacturing and the Environment

    National Precast Concrete Association / Precast Magazines / Precast Inc. Magazine / Archive - 2009-2010 / Precast Concrete Manufacturing and the Environment July 28, 2010 1 Comment As a building material, precast concrete has an edge over other materials in many sustainability practices, but a precaster can be environmentally friendly in other ...

  • Is concrete bad for the environment? - TheGreenAge

    Yes concrete does have an energy input cost but compared to other building material it performs better and is a safer construction material, A concrete building or bridge does not fail in the same way as steel, concrete will show signs of warning long before failure. Just remember that many early concrete structures last for hundreds of years.

  • pollution in production of concrete

    Quality Assurance The production of precast concrete elements, Concrete production can create pollution mainly in the form of dust and noise. Cement Wikipedia. The most common use for Portland cement is in the production of concrete. These include emissions of airborne pollution in

  • Concrete Solutions That Lower Both Emissions and Air Pollution

    Mar 31, 2020  Concrete production contributes 8 percent of global greenhouse gases, and demand continues to rise as populations and incomes grow. Yet some commonly discussed strategies to reduce the sector’s global GHG emissions could, under some scenarios, increase local air pollution and related health damages, according to a study from the University of ...

  • Environmental Impacts of Concrete and its Solution - YouTube

    Apr 18, 2019  The environmental impact of concrete, its manufacture and applications, are complex. ... Concrete causes damage to the most fertile layer of the earth, the topsoil. Concrete is

  • Construction is a cause of global warming, but is concrete ...

    Under optimum conditions, concrete can absorb up to 17 per cent of the CO 2 emitted during production; but a more realistic figure for in-service concrete is between 5 and 7 per cent. If all these strategies were applied together, this would allow for a maximum reduction of embodied carbon per kg of traditional concrete of about 37 per cent.

  • Waste Materials Used in Concrete Manufacturing ScienceDirect

    For rice growing countries, rice husks have attracted more attention due to environmental pollution and an increasing interest in conservation of energy and resources. For developing countries where rice production is abundant, the use of rice husk ash (RHA) to substitute for cement is attractive because of its high reactivity.

  • Concrete Solutions That Lower Both Emissions and Air Pollution

    Mar 31, 2020  Concrete production contributes 8 percent of global greenhouse gases, and demand continues to rise as populations and incomes grow. Yet some commonly discussed strategies to reduce the sector’s global GHG emissions could, under some scenarios, increase local air pollution and related health damages, according to a study from the University of ...

  • Environmental Impacts of Concrete and its Solution - YouTube

    Apr 19, 2019  The environmental impact of concrete, its manufacture and applications, are complex. ... Concrete causes damage to the most fertile layer of the earth, the topsoil. Concrete is used to create hard ...

  • 作者: Civil Mentor
  • Construction is a cause of global warming, but is concrete ...

    Under optimum conditions, concrete can absorb up to 17 per cent of the CO 2 emitted during production; but a more realistic figure for in-service concrete is between 5 and 7 per cent. If all these strategies were applied together, this would allow for a maximum reduction of embodied carbon per kg of traditional concrete of about 37 per cent.

  • Waste Materials Used in Concrete Manufacturing ScienceDirect

    For rice growing countries, rice husks have attracted more attention due to environmental pollution and an increasing interest in conservation of energy and resources. For developing countries where rice production is abundant, the use of rice husk ash (RHA) to substitute for cement is attractive because of its high reactivity.

  • (PDF) Environmental Pollution by Cement Industry

    The main environmental issues associated with cement production are the consumption of raw materials and energy use as well as emissions to air. Discover the world's research 17+ million members

  • Tim Jervis: CO2 pollution from nuclear construction is ...

    May 15, 2007  CO2 pollution from nuclear construction is irrelevant Nuclear power is often cited as part of the solution of a low-carbon future, but detractors sometimes cite the CO2 pollution that would result from the concrete and steel needed for construction as a reason to hold back.

  • U.S. Cement Industry - Statistics Facts Statista

    Cement is mostly used for the production of concrete: in the United States, some 70 percent of cement sales went to producers of ready-mixed concrete and around 10 percent of sales went to ...

  • Concrete CO Fact Sheet - NRMCA Expanding the Concrete ...

    Concrete is used in nearly every type of construction, including homes, buildings, roads, bridges, airports and subways, just to name a few. And in an era of increased attention on the environmental impact of construction, concrete performs well when compared to other building materials. As with any building product, production of concrete

  • Methods to Reduce Environmental Impact of Concrete

    Cement Conservation to Reduce Environmental Impact of Concrete The conservation of cement is the first and most important step in decreasing both energy utilization and greenhouse gas emission. Resource productivity consideration stipulates the deduction of the utilization of Portland cement while meeting the future demands for more concrete.

  • How concrete is made - material, manufacture, making, how ...

    Concrete is a hardened building material created by combining a chemically inert mineral aggregate (usually sand, gravel, or crushed stone), a binder (natural or synthetic cement), chemical additives, and water. Although people commonly use the word "cement" as a synonym for concrete, the terms in fact denote different substances: cement, which ...

  • ENVIRONMENTAL IMPACTS OF CEMENT PRODUCTION

    Environmental impacts. The main environmental issues associated with cement production are consumption of raw materials and energy use as well as emissions to air. Waste water discharge is usually limited to surface run off and cooling water only and causes no substantial contribution to water pollution.

  • Impacts of Cement Industry on Environment - An Overview

    Since clinker production is the dominant pollution producing step in cement production, the substitution of clinker with mineral components such as ground granulated blast furnace slag or fly ash ...

  • United States Environmental Protection Agency General Air ...

    The state concrete batch plant permits limit emissions with either concrete production limits or pollutant emission limits. Only a few of the state concrete batch plant permits (Florida, Maryland, Maine) restrict issuance to true minor sources whose potential to emit (PTE) of criteria pollutants is less than 100 tons per year (tpy). The

  • How to Reduce Emissions from Concrete Production Pollution ...

    Priced at almost a half-a-trillion-dollar industry, concrete production is big business. However, a research paper published in the journal Nature Climate Change last month found that the damages caused by the practice – in the form of healthcare bills from air pollution and climate change consequences – amounted to approximately $335 ...

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    The materials of processing: *

    • Granite
    • Limestone
    • Basalt
    • Pebble
    • Gravel
    • Gypsum
    • Marble
    • Barite
    • Quartz
    • Dolomite
    • Gold Ore
    • Copper ore
    * *

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