Abstract
The influence of nano-silica addition on the durability of concrete has been studied. Nano-silica particles (0 to 3 wt%) by cement were incorporated in the concrete and their effect on abrasion and impact resistance was analysed after 56 days. The test results showed that the abrasion loss of concrete reduces as the content of the nano-silica increases. In M 30 and M 40 grade concrete, with addition of 3 % nano-silica abrasion loss was decreased by 29.82 % and 52.21 % respectively when compared with concrete without nano-silica. The impact resistance of concrete also dramatically improved with the rise in nano-silica content. The number of blows required for ultimate failure was increased by 207.69 % and 304.16 % for M 30 and M 40 grade concrete mixes with 3 % nano-silica. The relationship between abrasion lossand compressive strength has been established, suggesting that the stronger the concrete, the more resistance it offers to wear. Nano-silica can be used to produce concrete that is both stronger and more durable.
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