Production of sustainable concrete for infrastructure construction is targeted by the concrete industry in many ways, including the use of supplementary cementitious materials, admixtures and recycled aggregates. Hydrated lime being used by the building industry for many years and its effects on fly ash concrete properties is not fully understood. This paper reports the results of an experimental investigation into the engineering properties of ultrafine fly ash concrete with the addition of either hydrated lime or silica fume. The development of compressive strength, tensile strength, modulus of elasticity and drying shrinkage with age was studied. The results indicated that compared to the control fly ash concrete, 10% silica fume addition caused 28 and 56 days compressive strength to improve by 24% and 15%, respectively. On the other hand, the same amount of hydrated lime addition had reduced the compressive strength by 12% and 20% at the same ages, respectively. The modulus of elasticity of concrete was increased by the addition of both silica fume and hydrated lime. 56-day drying shrinkage was increased by 3% and 14%, by the silica fume and hydrated lime addition, respectively. Undesirable effect of hydrated lime addition on compressive strength could be related to increased internal porosity and non-reactive nature of the hydrated lime, although it could activate the pozzolanic reaction of fly ash from early age. On the other hand, the addition of extra-fine silica fume improved the compressive strength through the combination of both filler and pozzolanic effects. Silica fume and hydrated lime added fly ash concretes are more sensitive to curing condition.