碳足迹

图7
The operational phase of any building far outweighs the construction phase in terms of energy use over a typical service life, 比如50年, and the longer the building is in operation, 好处就越大.

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  • Operating buildings uses significant amounts of energy, amounting to 80-90% of their lifetime emissions.
  • 在美国, more than 40% of carbon dioxide emissions each year are attributed to heating, 冷却, 和操作的建筑. This represents about 10% of the world’s energy use.
  • A cradle to grave life-cycle analysis approach to realistic carbon accounting would show that from material harvest to disposal, concrete compares similarly to many other building materials in carbon emissions.

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  • The thermal mass properties of concrete wall systems allow them to slow down heat transfer, reducing heating/冷却 costs by maintaining temperatures for longer. 电竞竞猜菠菜外围app下载 walls form a tight envelope to eliminate gaps in walls and reduce drafts and hot/cold spots.
  • 电竞竞猜菠菜外围app下载 systems are built to last a long time - even if they’re exposed to an extreme weather events -and the durability results in minimal costs for maintenance and repair.
  • The greater resilience of concrete buildings = more sustainable construction. With a lower cost to operate and maintain, longer use results in bigger savings .

电竞竞猜菠菜外围app下载 for a Reduced 碳足迹

Carbon dioxide is a greenhouse gas and its presence in the atmosphere is associated with carbon emissions from all sorts of activities, both natural and those associated with human activity. All construction materials emit CO2 during manufacture, but that is only part of the story. The carbon foot打印 of a building must also take into account the building’s energy usage and how long the building lasts. Given the proven durability and resilient performance of concrete materials and systems, concrete buildings can save owners money with reduced operating costs over a long life. Long life plus good energy efficiency helps to minimize harmful CO2 emissions.