Fracture properties of the alkali silicate gel using microscopic scratch testing

Caroline V. Johnson; Jiaxin Chen; Nicole P. Hasparyk; Paulo J.M. Monteiro; Ange Therese Akono

doi:10.1016/j.cemconcomp.2017.01.012

Fracture properties of the alkali silicate gel using microscopic scratch testing

Caroline V. Johnson, Jiaxin Chen, Nicole P. Hasparyk, Paulo J.M. Monteiro, Ange Therese Akono

Research output: Contribution to journal › Article › peer-review

Abstract

We carry out a multi-scale investigation of the fracture properties of the gel produced by the alkali-silica reaction in concrete. Milimeter-sized alkali gels are tested via scratch tests at the micrometer level. Scanning electron microscopy reveals curved fracture surfaces produced during the scratch test, warranting a fracture mechanics analysis. By application of a nonlinear fracture mechanics model to the recorded load and depth data, we estimate the fracture toughness of ASR gel to be K_c=0.62 MPam. In turn, by combining micro-indentation and scratch tests, we can estimate the fracture energy G_f=11.2 J/m². These experimental results are important for the multi-scale modeling of the alkali-aggregate reaction.

Original language	English (US)
Pages (from-to)	71-75
Number of pages	5
Journal	Cement and Concrete Composites
Volume	79
DOIs	https://doi.org/10.1016/j.cemconcomp.2017.01.012
State	Published - May 1 2017

Keywords

Alkali-silica gel
Fracture toughness
Scratch test

ASJC Scopus subject areas

Building and Construction
General Materials Science

Online availability

10.1016/j.cemconcomp.2017.01.012

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title = "Fracture properties of the alkali silicate gel using microscopic scratch testing",

abstract = "We carry out a multi-scale investigation of the fracture properties of the gel produced by the alkali-silica reaction in concrete. Milimeter-sized alkali gels are tested via scratch tests at the micrometer level. Scanning electron microscopy reveals curved fracture surfaces produced during the scratch test, warranting a fracture mechanics analysis. By application of a nonlinear fracture mechanics model to the recorded load and depth data, we estimate the fracture toughness of ASR gel to be Kc=0.62 MPam. In turn, by combining micro-indentation and scratch tests, we can estimate the fracture energy Gf=11.2 J/m2. These experimental results are important for the multi-scale modeling of the alkali-aggregate reaction.",

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author = "Johnson, {Caroline V.} and Jiaxin Chen and Hasparyk, {Nicole P.} and Monteiro, {Paulo J.M.} and Akono, {Ange Therese}",

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AU - Johnson, Caroline V.

AU - Chen, Jiaxin

AU - Hasparyk, Nicole P.

AU - Monteiro, Paulo J.M.

AU - Akono, Ange Therese

PY - 2017/5/1

Y1 - 2017/5/1

N2 - We carry out a multi-scale investigation of the fracture properties of the gel produced by the alkali-silica reaction in concrete. Milimeter-sized alkali gels are tested via scratch tests at the micrometer level. Scanning electron microscopy reveals curved fracture surfaces produced during the scratch test, warranting a fracture mechanics analysis. By application of a nonlinear fracture mechanics model to the recorded load and depth data, we estimate the fracture toughness of ASR gel to be Kc=0.62 MPam. In turn, by combining micro-indentation and scratch tests, we can estimate the fracture energy Gf=11.2 J/m2. These experimental results are important for the multi-scale modeling of the alkali-aggregate reaction.

AB - We carry out a multi-scale investigation of the fracture properties of the gel produced by the alkali-silica reaction in concrete. Milimeter-sized alkali gels are tested via scratch tests at the micrometer level. Scanning electron microscopy reveals curved fracture surfaces produced during the scratch test, warranting a fracture mechanics analysis. By application of a nonlinear fracture mechanics model to the recorded load and depth data, we estimate the fracture toughness of ASR gel to be Kc=0.62 MPam. In turn, by combining micro-indentation and scratch tests, we can estimate the fracture energy Gf=11.2 J/m2. These experimental results are important for the multi-scale modeling of the alkali-aggregate reaction.

KW - Alkali-silica gel

KW - Fracture toughness

KW - Scratch test

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Fracture properties of the alkali silicate gel using microscopic scratch testing

Abstract

Keywords

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