Geo-polymer Ⅰ

[1330] NEUTRALIZATION RESISTANCE OF FLY ASH AND BLAST FURNACE SLAG BASED GEOPOLYMER CONCRETE

Sha LI¹, Zhuguo LI¹, Tomohide NAGAI², Tomohisa OKATA³ (1.山口大学 2.三重県建設資材試験センター 3.東邦化学工業)

Keywords:geopolymer concrete, fly ash, blast furnace slag, neutralization resistance, pH, ジオポリマーコンクリート, フライアッシュ, 高炉スラグ, 中性化抵抗性, pH

In this study, we investigated neutralization resistance of fly ash (FA)- blast furnace slag (BFS) based GP concrete in different environments, and compared with normal OPC concrete with same compressive strength. The experimental results show that, FA-BFS based GP concrete, using 30% BFS, had a lower neutralization resistance than OPC concrete; wetting-drying cycle led to neutralization of GP concrete; drying accelerated neutralization of inside of GP concrete; high temperature curing improved the neutralization resistance of GP concrete; and the pH value at the boundary of color change after spraying phenolphthalein solution was around 11.4.