Numerical Modelling of the Effect of Filler/Matrix Interfacial Strength on the Fracture of Cementitious Composites

Xiaowei Ouyang, Zichao Pan, Zhiwei Qian, Yuwei Ma, Guang Ye

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)
43 Downloads (Pure)

Abstract

The interface between filler and hydration products can have a significant effect on the mechanical properties of the cement paste system. With different adhesion properties between filler and hydration products, the effect of microstructural features (size, shape, surface roughness), particle distribution and area fraction of filler on the fracture behavior of a blended cement paste system is supposed to be different, as well. In order to understand the effect of the microstructural features, particle distribution and area fraction of filler on the fracture behavior of a blended cement paste system with either strong or weak filler-matrix interface, microscale simulations with a lattice model are carried out. The results show that the strength of the filler-matrix interface plays a more important role than the microstructural features, particle distribution and area fraction of filler in the crack propagation and the strength of blended cement paste. The knowledge acquired here provides a clue, or direction, for improving the performance of existing fillers. To improve the performance of fillers in cement paste in terms of strength, priority should be given to improving the bond strength between filler particles and matrix, not to modifying the microstructural features (i.e., shape and surface roughness) of the filler.
Original languageEnglish
Article number1362
Pages (from-to)1-21
Number of pages21
JournalMaterials
Volume11
Issue number8
DOIs
Publication statusPublished - 2018

Keywords

  • filler
  • interface
  • mechanical properties
  • blended cement paste
  • lattice fracture model
  • OA-Fund TU Delft

Fingerprint Dive into the research topics of 'Numerical Modelling of the Effect of Filler/Matrix Interfacial Strength on the Fracture of Cementitious Composites'. Together they form a unique fingerprint.

Cite this