Influence on Compressive Stregnth of Concrete on Addition of Micro Alumina Particles to Cement

In this experimental work, micro Alumina particles have been mixed in M 25 grade concrete with various percentage (by weight of cement) to know the effect of micro Alumina particles on compressive strength of concrete. The percentages of micro Alumina particles range from 0% to 15% with an increment of 1%. For each sample three specimens were casted and tested for 7 days compressive strength and three specimens were casted and tested for 28 days compressive strength. The compressive strength test has been conducted after 7 days curing and 28 days curing. The specimens containing 4% of micro Alumina particles showed peak average compressive strength of 22.6N/mm at 7 days age, which was 13% higher than average compressive strength of controlled specimens at 7 days age. The specimens containing 12% of micro Alumina particle showed peak average compressive strength of 40.51N/mm at 28 days age, which was 22.79% higher than average compressive strength of controlled specimens at 28 days.