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Related Concept Videos

Design Example: Sustainability in Concrete Building01:26

Design Example: Sustainability in Concrete Building

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As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
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The Aggregate Cement ratio refers to the weight of aggregate divided by the weight of cement in a concrete mix. Altering this ratio has profound effects on the concrete's properties. This ratio plays a pivotal role in determining the strength, workability, and durability of concrete. When the Aggregate Cement ratio is higher, the mix is leaner, meaning it has less cement paste to lubricate the aggregate, potentially making the concrete less workable. Such mixes, known as lean, enhance the...
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Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
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A Hybrid Framework for Direct CO2 Emissions Quantification in China's Construction Sector.

Adedayo Johnson Ogungbile1, Geoffrey Qiping Shen1, Ibrahim Yahaya Wuni1

  • 1Department of Building and Real Estate, The Hong Kong Polytechnic University, Hong Kong, China.

International Journal of Environmental Research and Public Health
|November 27, 2021
PubMed
Summary

China’s construction industry has inconsistent carbon emission data. This study quantifies regional direct CO2 emissions using economic and environmental data, identifying North China as the largest emitter and highlighting coal and oil as primary energy sources.

Keywords:
direct CO2 emissionseconometric analysisenergy consumptionfossil fuelregional construction industry

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Area of Science:

  • Environmental Science
  • Economics
  • Energy Policy

Background:

  • Inconsistent carbon emission quantifications in China due to varied standards and methods.
  • Lack of China-specific technology and databases hinders comprehensive CO2 emission assessment.
  • Need for accurate regional direct CO2 emission data in the construction industry.

Purpose of the Study:

  • To comprehensively quantify regional direct CO2 emissions in China's construction industry.
  • To develop regression models integrating economic and environmental data for emission analysis.
  • To identify key energy sources and regional emission hotspots within the industry.

Main Methods:

  • Collected provincial energy yearbook data (1997-2015) on fossil fuels and electricity.
  • Integrated econometric data: total construction output, cement, and steel consumption.
  • Developed regression models for six regional construction industries in China.

Main Results:

  • North China identified as the primary source of direct CO2 emissions (>30%); Southeast China contributed the least.
  • Coal and crude oil remain dominant energy sources despite a gradual shift to alternatives.
  • Cement and steel consumption showed a significant predictive relationship with CO2 emissions in five regions.

Conclusions:

  • Tailored policies are needed for technological improvements to boost renewable energy in construction.
  • Developed models can aid initial carbon emission quantification for similar industries.
  • Future research should extend economic indicators for more robust emission models.