Publication detail

Effect of gel–space ratio and microstructure on strength of hydrating cementitious materials: An engineering micromechanics approach

PICHLER B., HELLMICH CH., EBERHARDSTEINER J., WASSERBAUER J., TERMKHAJORNKIT P., BARBARULO R., CHANVILLARD G.

Original Title

Effect of gel–space ratio and microstructure on strength of hydrating cementitious materials: An engineering micromechanics approach

Type

journal article - other

Language

English

Original Abstract

Strengths of cement pastes with different mixture properties and maturities depend in a very similar overlinear fashion on the gel–space ratio, which is the ratio of the volume of hydration products over the volume of both hydration products and capillary pores. We here investigate the underlying microstructural effects by the experimentally validated micromechanics model of Pichler and Hellmich [CemConRes 41(5), 2011]. This model shows that the macrostrength of cement pastes are not only triggered by the capillary porosity, but also by a strengthening effect of unhydrated clinker - reinforcements - which are embedded as inclusions in the hydrate foam. The analysis is continued with quantifying the strength of the hydrates, in terms of an extended model validation activity. Satisfactory model performance is the motivation to present model predictions for the biaxial compressive failure envelopes of cement pastes, again as a function of gel–space ratio.

Keywords

Compressive strength (C); Micromechanics (C); Cement paste (D); Mortar (E)

Authors

PICHLER B., HELLMICH CH., EBERHARDSTEINER J., WASSERBAUER J., TERMKHAJORNKIT P., BARBARULO R., CHANVILLARD G.

RIV year

2013

Released

1. 3. 2013

Publisher

ELSEVIER

Location

Lausanne, Switzerland

ISBN

0008-8846

Periodical

Cement and Concrete Research

Year of study

45

Number

3

State

United Kingdom of Great Britain and Northern Ireland

Pages from

55

Pages to

68

Pages count

14

BibTex

@article{BUT97880,
  author="Jaromír {Wasserbauer}",
  title="Effect of gel–space ratio and microstructure on strength of hydrating cementitious materials: An engineering micromechanics approach",
  journal="Cement and Concrete Research",
  year="2013",
  volume="45",
  number="3",
  pages="55--68",
  issn="0008-8846"
}