TY - JOUR ID - TI - Performance of Geopolymer Concrete Exposed to Freezing and Thawing Cycles AU - Tareq S. al-Attar AU - Basil S. Al-Shathr AU - Mohammed H. Shamsa PY - 2019 VL - 37 IS - 3 Part (A) Engineering SP - 78 EP - 84 JO - Engineering and Technology Journal مجلة الهندسة والتكنولوجيا SN - 16816900 24120758 AB - In this study, the effect of rapid freezing and thawing (ASTM C666– procedure A) on three different types of Geopolymer concrete studiedusing three types of pozzolanic material: fly ash, metakaolin and groundgranulated blast furnace slag (GGBFS). The Geopolymer concrete wasprepared using 400 kg of the pozzolanic material with alkaline liquidprepared at 8 molar concentration with normal fine and coarse aggregates.The ratio of alkaline to fly ash and GGBFS was 1.5: 1 and for metakaolinwas 2: 1 for workability and compressive strength requirements. Specimens(100 × 100 × 400) mm were exposed to 100, 200 and 300 cycles of freezingand thawing. The decrease in measured compressive strength was (23, 43,and 26%) for Fly ash, metakaolin and GGBFS respectively. The investigatedtypes of concrete showed good resistance to freezing and thawing. Thedurability factor of these types was (77%, 68%, and 81%) for fly ash,metakaolin, and GGBFS respectively.Keywords- Freezing and thawing,

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