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Silica Nano Particle

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Nano silica

in the construction industry, extensive research is going on to improve the performance of various building materials and development of durable and sustainable concrete. Among all the nano-materials, nano-silica is the most widely used material in the cement and concrete to improve the performance because of its pozzolanic reactivity besides the pore-filling effect.

concrete strength is influenced by lots of factors like concrete ingredients, age, ratio of water to cement materials, etc. Nano-silica incorporation into concrete resulted in higher compressive strength than that of normal concrete to a considerable level.

for nano-silica blended concretes up to maximum limit of 2% with average particle size of 15 and 80 nm. Same results were obtained for split tensile and flexural strength.

certificate of analysis

nano silica

test item

standard requirements

test results

specific surface area ( m2/g)

200 + 20

202

ph value

3. 7 – 4. 5

4. 12

loss on drying @ 105 deg. C (5)

< 1. 5

0. 47

loss on ignition @ 1000 deg. C (%)

< 2. 0

0. 66

sieve residue (5)

< 0. 04

0. 02

tamped density g/l

40 – 60

44

sio2 content ( % )

> 99. 8

99. 88

carbon content (%)

< 0. 15

0. 06

chloride content (%)

< 0. 0202

0. 009

al2o3

< 0. 03

0. 005

tio2

< 0. 02

0. 004

fe2o3

< 0. 003

0. 001

specific gravity

2. 2 – 2. 4

(generalised )

particla size

17 nano

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