Cristin-resultat-ID: 1273753
Sist endret: 24. september 2015, 21:30
Resultat
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2007

Silica Fume in High Quality Concret - A review of Mechanism and Performance.

Bidragsytere:
  • Harald Justnes

Bok

SP-242 9th Canmet/ACI Fly Ash Conference
ISBN:
  • 9780870312359

Utgiver

American Concrete Institute
NVI-nivå 1

Om resultatet

Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Publiseringsår: 2007
Hefte: 242
Sider: 63 - 78
ISBN:
  • 9780870312359

Importkilder

SINTEF AS-ID: S4339

Beskrivelse Beskrivelse

Tittel

Silica Fume in High Quality Concret - A review of Mechanism and Performance.

Sammendrag

The influence of silica fume (SF) on performance of cementitious systems like concrete is due to physical (i.e. improved particle packing) and chemical i.e. pozzolanic reaction) effects. Since silica fume particles are much smaller than cement grains they will pack in the voids between cement grains. In this way the system is densified already at the time of setting. SF is an active pozzolana that leads to strength increase. When SF is not used to obtain equal strength at higher w/cm than reference, but to obtain high performance concrete with lower w/cm including plasticizers, no durability problems should occur unless adequate precautions are not taken to prevent cracking from autogenous shrinkage and high heat of hydration. In general, the use of SF in concrete mixtures reduces the permeability to waterborne aggressive ions (e.g. alkalis, chlorides, sulfates), thus mitigating the potential for sulfate attack, alkali-aggregate reactions, and corrosion of reinforcing steel in concrete.

Bidragsytere

Harald Justnes

  • Tilknyttet:
    Forfatter
    ved Arkitektur, byggematerialer og konstruksjoner ved SINTEF AS
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Resultatet er en del av Resultatet er en del av

SP-242 9th Canmet/ACI Fly Ash Conference.

2007, American Concrete Institute. Vitenskapelig antologi/Konferanseserie
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