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A Review on Carbon Emissions of Ultra-High-Performance Fiber Reinforced Concrete as a Building Construction Material.

Number: 3510

Author(s) : AQIB S. M., MA Z. J.

Summary

Cement, as the most important component used in concrete, contributes 5-8% of global CO2 emissions due to its highly energy intensive manufacturing process. Traditional reinforced concrete (RC), which is commonly used building material contains approximately 15% of the cement. But due to increasing demand and bulk design volume, RC requires high quantity of cement. In 2021, the global cement production was 4.4 billion metric tons. Ultra-High-Performance Fiber Reinforced Concrete (UHPFRC) is an emerging high-tech building material with an increased strength and durability compared to conventional concrete. This is achieved by low water-to-binder ratio (w/b<0.25), steel fibers and a very dense particle packing using finer sand and silica fume. UHPFRC requires significantly less material and less maintenance for similar mechanical performance and provides higher lifespan. But it also consists higher cement content contributing to high carbon footprint. The mechanical properties of UHPFRC are being widely researched and improved but the environmental impacts are rarely considered. So, there is a need to review and compare the long-term environmental impacts of UHPFRC and conventional RC. In this study, a review of the life cycle environmental impact analysis is presented which compares the Global Warming
Potential (GWP) of conventional concrete to UHPFRC over a construction phase and cradle-to-grave phase. It is observed that the GWP of UHPFRC is at least 60% greater than conventional concrete but when the cradle-to-grave phase is considered, the GWP of UHPFRC outperforms the conventional concrete.

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Pages: 10 p.

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Details

  • Original title: A Review on Carbon Emissions of Ultra-High-Performance Fiber Reinforced Concrete as a Building Construction Material.
  • Record ID : 30030254
  • Languages: English
  • Source: 2022 Purdue Conferences. 7th International High Performance Buildings Conference at Purdue.
  • Publication date: 2022
  • Document available for consultation in the library of the IIR headquarters only.

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