TY - JOUR KW - Compressive strength; Curing; Fly ash; Geopolymers; Inorganic polymers; Mortar; Silicates; Sodium hydroxide KW - Alkaline activators; Class-f; Geopolymerization; Reactive metakaolin; Sodium hydroxide solutions; Sodium silicate; Sodium silicate solutions; Strength development KW - C (programming language) ID - scholars9222 N2 - This article aims to investigate the compressive strength variation by the addition of metakaolin as a substitute of fly ash in the fly ash based geopolymer mortar. Five, ten and fifteen percent by weight of fly ash was replaced by highly reactive metakaolin. Two type of fly ashes namely, ASTM class F and ASTM class C were used as a base material for the synthesis of geopolymer mortar. Eight molar sodium hydroxide solution mixed with sodium silicate solution was used as alkaline activator. For optimum geopolymerization, mortar was cured at sixty degree Celsius for twenty four hours duration. Results show different behavior of metakaolin replacement on compressive strength for two different types of fly ash based geopolymer mortar. Improvement in compressive strength was seen by addition of metakaolin in ASTM class F fly ash based geopolymer. On the other hand compressive strength was decreased abruptly in fly ash class C based geopolymer up to certain replacement level. © 2017 Trans Tech Publications, Switzerland. VL - 744 74 UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85027056275&doi=10.4028%2fwww.scientific.net%2fKEM.744.131&partnerID=40&md5=4f19d24951bba13b4ad93cd8366c1bdc JF - Key Engineering Materials A1 - Zahid, M. A1 - Shafiq, N. A1 - Nuruddin, M.F. A1 - Nikbakht, E. A1 - Jalal, A. Y1 - 2017/// SP - 131 TI - Effect of partial replacement of fly ash by metakaolin on strength development of fly ash based geopolymer mortar N1 - cited By 12; Conference of International Symposium on Material Science and Engineering, ISMSE 2017 ; Conference Date: 13 January 2017 Through 15 January 2017; Conference Code:195639 AV - none EP - 135 SN - 10139826 PB - Trans Tech Publications Ltd ER -