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Hierarchical Toughening of a Biomimetic Bulk Cement Composite.
Pan, Hao; She, Wei; Zuo, Wenqiang; Zhou, Yang; Huang, Jiale; Zhang, Zhongwen; Geng, Zifan; Yao, Yiming; Zhang, Wenhua; Zheng, Li; Miao, Changwen; Liu, Jiaping.
Affiliation
  • Pan H; Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China.
  • She W; Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China.
  • Zuo W; Laboratoire Navier, IFSTTAR / CNRS / ENPC, Université Gaustave Eiffel, Champs-sur-Marne 77420, France.
  • Zhou Y; Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China.
  • Huang J; Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China.
  • Zhang Z; School of Civil Engineering, Southeast University, Nanjing 211189, China.
  • Geng Z; Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China.
  • Yao Y; School of Civil Engineering, Southeast University, Nanjing 211189, China.
  • Zhang W; College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China.
  • Zheng L; School of Science and Engineering, University of Dundee, Dundee DD1 4HN, U.K.
  • Miao C; Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China.
  • Liu J; Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China.
ACS Appl Mater Interfaces ; 12(47): 53297-53309, 2020 Nov 25.
Article in En | MEDLINE | ID: mdl-33169963
Because of the inherent quasibrittleness and heterogeneity, matrix-directed toughening of concrete and cement composites remains to be a huge challenge. Herein, inspired by nacre materials, a novel biomimetic bulk cement composite is fabricated via a facile and efficient process based on compacting prefabricated multisized cement-polymer hybrid prills. This method combines with the three-dimensional "brick-bridge-mortar" structure design and synchronously the intrinsic and extrinsic toughening strategies. Such an approach shows the remarkable maximum toughness enhancement of 27-fold with 71% increase in flexural strength via cooperation with only 4 wt % organic matter. More attractively, it alters the traditional brittle fracture of cement composites to a distinct ductile fracture. In addition, such a biomimetic composite demonstrates the long-term ever-increasing strength and toughness, performing the excellent ductile-fracture retention ability. The hierarchical toughening mechanisms are further revealed with the synergy of microscopic characterizations and simulation methods. This strategy provides a new route for the development of high toughness biomimetic cement-based materials for potential applications in civil engineering domain.
Key words

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: ACS Appl Mater Interfaces Journal subject: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Year: 2020 Document type: Article Affiliation country: China Country of publication: United States

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: ACS Appl Mater Interfaces Journal subject: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Year: 2020 Document type: Article Affiliation country: China Country of publication: United States