Fire resistance of high-volume fly ash mortars with nanosilica addition

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

High-volume fly ash has been widely used in concrete to reduce the cost and environmental impact of producing cements. However, the effect of high temperature on cement-based materials containing fly ash and nanosilica has not been well characterized. In this study, cement was replaced by high-volume fly ash combined with colloidal nanosilica to produce high strength mortars with high residual strength after exposure to high temperatures of 400°C and 700°C. Heated and unheated specimens were subjected to flexural and compression tests. The samples were evaluated by scanning electron microscopy (SEM), X-ray diffraction (XRD) and thermogravimetric analysis (TGA) tests; and their porosity were determined using BET (Brunauer, Emmett, and Teller) technique to study the specimens' behavior after exposure to high temperatures. High strength mortars can be produced using nanosilica and fly ash with resultant high residual strength, as confirmed by the porosity, XRD and TGA tests results.

Original languageEnglish
Pages (from-to)779-786
Number of pages8
JournalConstruction and Building Materials
Volume36
DOIs
Publication statusPublished - Nov 2012

Fingerprint

Coal Ash
Fire resistance
Mortar
Fly ash
Cements
X ray diffraction analysis
Thermogravimetric analysis
Porosity
Temperature
Environmental impact
Concretes
Scanning electron microscopy
Costs

Keywords

  • Colloidal nanosilica
  • High temperature
  • High-volume fly ash
  • Microstructure
  • Strength

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

Cite this

Fire resistance of high-volume fly ash mortars with nanosilica addition. / Ibrahim, Rahel Kh; Hamid, Roszilah; Taha, Mohd. Raihan.

In: Construction and Building Materials, Vol. 36, 11.2012, p. 779-786.

Research output: Contribution to journalArticle

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