The development of compressive strength of ground granulated blast furnace slag-palm oil fuel ash-fly ash based geopolymer mortar

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• 作者：Azizul Islam ; U. Johnson Alengaram ; Mohd Zamin Jumaat ; Iftekhair Ibnul Bashar
• 关键词：Palm oil fuel ash ; Ground granulated blast furnace slag ; Fly ash ; Manufactured sand ; Geopolymer mortar ; Compressive strength
• 刊名：Materials and Design
• 出版年：April, 2014
• 年：2014
• 卷：56
• 期：Complete
• 页码：833-841
• 全文大小：1827 K

文摘

The paper presents the report on the use of optimum level of palm oil fuel ash (POFA), ground granulated blast furnace slag (GGBS) and low calcium fly-ash (FA) with manufactured sand (M-sand) to produce geopolymer mortar. Eleven mixtures were prepared with varying binder contents with the POFA content varying between 25% and 100%; the other constituent materials such as fine aggregate and water were kept constant. All the specimens were cured in oven for 24 h at 65 掳C and thereafter kept in room temperature (about 26-29 掳C) before testing for the compressive strength. The highest compressive strength of about 66 MPa was achieved for the mortar containing 30% of POFA and 70% of GGBS with a total binder content of 460 kg/mup>3up>. The increase in the POFA content beyond 30% reduces the compressive strength. The density reduction after 3 days was found negligible.