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Intrinsic self-stressing and low carbon Engineered Cementitious Composites (ECC) for improved sustainability

Journal Article · · Cement and Concrete Research
 [1];  [2];  [3];  [2];  [2]
  1. University of Michigan, Ann Arbor, MI (United States); OSTI
  2. University of Michigan, Ann Arbor, MI (United States)
  3. University of Michigan, Ann Arbor, MI (United States); China University of Geosciences-Wuhan (China)
Engineered Cementitious Composites (ECC) is an emerging cementitious composite material with ultra-high ductility. However, its higher cement dosage limits its material greenness and leads to concerns with drying shrinkage. In this research, an ECC utilizing limestone calcined clay cement (LC3) and calcium sulphoaluminate cement (CSA) is investigated, focusing on minimizing the material's embodied carbon while enhancing its durability with intrinsic self-stressing functionality. A self-stressing criterion is theoretically established and experimentally verified. X-ray diffraction patterns reveal an ettringite quantity that modulates the initial expansion and later expansion-reversal of LC3-CSA-ECC to support a persistent self-stressing mechanism. LC3-CSA-ECC has a lower (64%) carbon footprint and similar embodied energy compared to conventional concrete. When combined with the durability advantage (tiny crack, high ductility of 5.5%, and self-stressing function), this low carbon self-stressing ECC holds promise as a sustainable repair material that lowers the embodied and operational carbon in civil infrastructure.
Research Organization:
University of Michigan, Ann Arbor, MI (United States)
Sponsoring Organization:
Center for Low Carbon Built-Environment (CLCBE); USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Grant/Contract Number:
AR0001141
OSTI ID:
1976936
Alternate ID(s):
OSTI ID: 23206160
Journal Information:
Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: C Vol. 149; ISSN 0008-8846
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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