Experimental design analysis of ultra fine fly ash, lime water, and basalt fibre in mix proportion of high volume fly ash concrete

This paper reports an analysis of three factors in mix proportion of high volume fly ash concrete to produce high strength concrete. The factors analyzed are type of fly ash, kind of mixing water and the utilization of basalt fibre. The type of fly ash factor comprises of the use of raw fly ash and ultra fine fly ash, whereas the kind of water consists of the use of lime water and tap water. The addition of basalt fibre to improve the ductility of high strength concrete is studied and also high strength concrete without basalt fibre is studied. To prepare the mix proportion and to analyze the compressive strength result, experimental design, a statistical method is used. In addition, the compressive strength of concrete is tested on concrete cylinder of ∅100 mm - height 200 mm at curing ages of 28 days and 56 days. The results show that the optimum mix proportion to produce high strength concrete is the mix proportion with the combination of high volume ultra fine fly ash and the use of lime water without the use of basalt fibre. Moreover, the optimum mix proportion meets the mix design of high strength concrete and has similar strength development as normal cement concrete at the age of 28 days.