Synergism between palm oil fuel ash and slag: Production of environmental-friendly alkali activated mortars with enhanced properties
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© 2018 Elsevier Ltd Environmental concern raised by the production of ordinary Portland cement (OPC), is behind the search for greener construction materials and remediation. One such material is alkali activated mortars (AAMs). It is well known that the high molarity of sodium hydroxide (12–16 M) and high content of sodium silicate (sodium silicate to sodium hydroxide higher than 2.5) have negative impacts on the environment. Driven by this idea, we prepared some binary alkali activated mortars by combining palm oil fuel ash (POFA) and ground blast furnace slag (GBFS) at varying ratios. The effect of low concentration alkaline solution on the fresh, mechanical and durable properties of alkali activated was determined. The ratio of sodium hydroxide (molarity 4 M) (NH) to sodium silicate (NS) in the mixture was kept at 0.75. Microstructures of the prepared alkali activated mortars were analyzed using SEM, XRD and FTIR measurements. The achieved high strength (˜72 MPa at age of 28 days) of the alkali activated mortars was attributed to the synergy between GBFS and POFA. Partial replacement of GBFS with POFA was demonstrated to be beneficial for improving the compressive strength, durability and resistance against sulphuric acid attack. Meanwhile, calcium aluminium silicate hydrate (CASH) gel was discerned to be the main reaction product of POFA and GBFS in these binary systems. It was established that the proposed AAMs can contribute towards the development of sustainable materials.
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Influence of different curing temperatures and alkali activators on properties of GBFS geopolymer mortars containing fly ash and palm-oil fuel ashHuseien, G.; Mirza, J.; Ismail, Mohamed; Hussin, M. (2016)© 2016 Elsevier Ltd This paper reports the influence of different curing temperatures, calcium content and different types of alkali activator solutions on properties of geopolymer mortars (GPM) containing industrial and ...
Huseien, G.; Ismail, Mohamed; Tahir, M.; Mirza, J.; Hussein, A.; Khalid, N.; Sarbini, N. (2018)As the cement industry contributed to increasing the global carbon dioxide emissions, researchers looked for other sustainable alternatives. Among them, one of the alternatives is alkali activated mortar containing no ...
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