Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Intrinsic self-stressing and low carbon Engineered Cementitious Composites (ECC) for improved sustainability
Abstract 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.
Highlights A self-stressing criterion for ECC was established and experimentally verified. An intrinsic self-stressing ECC was developed by utilizing LC3 and CSA cement. Initial maximum expansion and later expansion loss were successfully tailored. Expansion mechanism was identified by XRD patterns. Self-stressing ECC has 64% of the carbon footprint of conventional concrete.
Intrinsic self-stressing and low carbon Engineered Cementitious Composites (ECC) for improved sustainability
Abstract 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.
Highlights A self-stressing criterion for ECC was established and experimentally verified. An intrinsic self-stressing ECC was developed by utilizing LC3 and CSA cement. Initial maximum expansion and later expansion loss were successfully tailored. Expansion mechanism was identified by XRD patterns. Self-stressing ECC has 64% of the carbon footprint of conventional concrete.
Intrinsic self-stressing and low carbon Engineered Cementitious Composites (ECC) for improved sustainability
Zhu, He (Autor:in) / Zhang, Duo (Autor:in) / Wang, Tianyu (Autor:in) / McBain, Morgan (Autor:in) / Li, Victor C. (Autor:in)
12.08.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Development of self-stressing Engineered Cementitious Composites (ECC)
| Elsevier | 2021
Design of Green Engineered Cementitious Composites for Improved Sustainability
| Online Contents | 2008
Design of Green Engineered Cementitious Composites for Improved Sustainability
| British Library Online Contents | 2008
| Europäisches Patentamt | 2018
| Europäisches Patentamt | 2021