TY - JOUR KW - Concrete industry; Fly ash; Geopolymers; Inorganic polymers; Mortar; Portland cement KW - Alkaline solutions; Binding materials; Geopolymer mortars; Ordinary Portland cement; Pozzolanic reaction; Setting time; Similar pattern; Workability KW - Compressive strength TI - Effect of alkaline solution to fly ash ratio on geopolymer mortar properties N2 - Geopolymer system is new binding materials in concrete industry that is produced by the alkaline solution and materials rich in aluminosilicate such as fly ash. The effect of the alkaline solution to fly ash ratios of 0.3, 0.4 and 0.5 on mortar geopolymer properties was an issue in this study. The results showed that the higher alkaline solution to fly ash ratio improves the workability and brings a longer setting time, whereas the lower alkaline solution to fly ash ratio gains the significant compressive strength. It was a similar pattern with conventional mortar used ordinary Portland cement, which the compressive strength at 7 days was 85-90 for 28 days compressive strength, whereas conventional mortar is only 65-75. This was due to the higher reactivity in geopolymer system that was faster than the pozzolanic reaction. © 2017 Trans Tech Publications, Switzerland. SN - 10139826 EP - 88 ID - scholars9340 AV - none SP - 85 PB - Trans Tech Publications Ltd Y1 - 2017/// UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85016186014&doi=10.4028%2fwww.scientific.net%2fKEM.733.85&partnerID=40&md5=d345473419d5218dacba0921560aabbb A1 - Fauzi, A. A1 - Nuruddin, M.F. A1 - Malkawi, A.B. A1 - Abdullah, M.M.A.B. A1 - Mohammed, B.S. N1 - cited By 13; Conference of International Conference on Nanotechnology and Nanomaterials in Energy, ICNNE 2016 ; Conference Date: 2 June 2016 Through 4 June 2016; Conference Code:190119 JF - Key Engineering Materials VL - 733 KE ER -