Presented in IASE's 11th Structural Engineering Convention(SEC-18)-2018 organised by Department of Civil Engineering,Jadavpur University,Kolkata held from 19-21 December,2018

1. INFLUENCE OF NANO SILICA ON THE
MECHANICAL BEHAVIOR AND
MICROSTRUCTURE OF CEMENT COMPOSITES
FOR BOTH SHORT & LONG TERMS
Mainak Ghosal1, Arun Kr Chakraborty2
1 Ph D. Research Scholar,2Associate Professor, Dep’t of Civil
Engineering, Indian Institute of Engineering Science and Technology,
Shibpur
XI SEC ,19th-21st December,2018

2. Cement Production
https://www.researchgate.net/figure/Cement-Production-of-India_fig7_327500060

3. Global Sand/Gravel
production in 2016-17
https://www.statista.com/statistics/376665/industrial-sand-and-gravel-production-by-top-countries/

4. Water Demand

5. So….

6. BUT
Nano-materials like Nano-
Silica has potential to
mitigate this…

7. The most significant TREND of
development
OPC
Blended
(PPC/PSC/PLC)
Composite
Cements
NANO
CEMENTS
Cément Production Technology:Principles & Practice-Dr.Anjan Kumar Chatterjee

8. Scopus Publications which include the terms
cement and nanotechnology or
nanomaterials
Guillermo Bastos,Faustino Patiño-Barbeito,Faustino Patiño-Cambeiro,and Julia Armesto(2016), ‘Nano-Inclusions Applied in Cement-Matrix
Composites: A Review’, Materials (Basel). 2016 Dec; 9(12): 1015, DOI: 10.3390/ma9121015

9. Nano Silica from Rice
Preparation of Nanosilica Powder from Rice Husk, Chiang Mai J. Sci. 2008; 35(1) : 206-211

10. Nano Silica in
Nucleation effects
Achutha Prabhu et al.Effect of Nano Seeds in C-S-H Gel Formation: Simulation Study from the Colloidal Point of View,Concreep
10,ASCE

11. Nano Silica in PORE-
FILLING effects
Source:https://advanceseng.com/surface-treatment-cementitious-materials-nanosio2pce-core-shell-nanoparticles/

12. Size DECREASES 
Mechanical Properties & Durability INCREASES INCREASES

13. Nanostructured Materials
Materials at the
Nanoscale brings
different laws of
Physics into play

14. Nanomaterials Used –
Nano Silica
Item Description
Active Nano Content 35-40%
Particle Size 5-40 nm
pH (20°C) 9-10
Specific Gravity 1.08-1.32

15. Cement Test Certificates

16. COLLODIAL SILICA

17. XRD image of
Nanomaterials used
RECORDING
2θ
2θ

18. Mortar Preparation for
Mechanical Testing
Nano-
materials
added
here

19. Mechanical Testing of
Cement Mortar Samples

20. % Nano
additions in
Cement
7 Days
Strength
(% incr.)
28 Days
Strength
(% incr.)
90 Days
Strength
(% incr.)
180 Days
Strength
(% incr.)
365 Days
Strength
(% incr.)
0% nS
21.08 MPa
(--)
31.89MPa
(--)
31.20MPa
(--)
30.01MPa
(--)
30.01MPa
(---)
0.5% nS
23.85MPa
(13.14% )
35.1MPa
(11 .35% )
41.30MPa
(32. 37% )
27.47MPa
(-9.24% )
26.76MPa
(-4.29%)
0.75% nS
27.73MPa
(31.54%)
42.27MPa
(32.55%)
49.85MPa
(59.78%)
32.52MPa
(8.36%)
31.5MPa
(4.96%)
1.0% nS
25.07MPa
(18.93%)
37.36MPa
(17.15%)
42.98MPa
(37.76%)
33.68MPa
(12.23%)
32.41MPa
(8.0%)
1.25% nS
23.17MPa
(9.91%)
30.85MPa
(-3.26%)
39.45MPa
(26.44%)
35.24MPa
(17.43%)
31.3MPa
(4.29%)
1.50% nS 23.81MPa
(12.95%)
37.79MPa
(18.50%)
33.42MPa
(7.12%)
31.23MPa
(4.07%)
29.12 MPa
(-2.96%)

21. 0
10
20
30
40
50
60
7 days 28 days 90 days 180 days 365 days
CcompressiveStrength,MPa
Age
Nano-Silica Addition in OPC Mortar
Ctrl Samp.
Ns=0.5%
nS=0.75%
nS=1.0%
nS=1.25%
nS=1.5%

22. OPTIMIZATION OF NANO-MATERIALS in
OPC
21.08
31.89
30.01
27.73
42.27
31.5
0
5
10
15
20
25
30
35
40
45
7 day Strength 28 day Strength 365 day Strength
Ordinary
Cement
Mortar
nS(opt.)

23. % Nano additions
in PPC
7 Days Strength
(% incr.)
28 Days Strength
(% incr.)
90 Days Strength
(% incr.)
180 Days Strength
(% incr.)
365 Days Strength
(% incr.)
0% nS
11.36 MPa
(--)
22.44 MPa
(--)
25.96 MPa
(--)
27.08 MPa
(--)
23.52MPa
(---)
0.5% nS
8.93MPa
(-21.39%)
27.16 MPa
(21.03%)
22.45 MPa
(-13.52%)
26.11MPa
(-3.58%)
21.26MPa
(9.61%)
0.75% nS
23.66MPa
(108.27%)
27.45 MPa
(22.32%)
33.17 MPa
(27.77%)
27.0 MPa
(-0.30%)
35.54MPa
(51.11%)
1.0% nS
25.07MPa
(18.93%)
37.36MPa
(17.15%)
42.98MPa
(37.76%)
33.68MPa
(12.23%)
32.41MPa
(8.0%)
1.25% nS
23.17MPa
(9.91%)
30.85MPa
(-3.26%)
39.45MPa
(26.44%)
35.24MPa
(17.43%)
31.3MPa
(4.29%)
1.50% nS 23.81MPa
(12.95%)
37.79MPa
(18.50%)
33.42MPa
(7.12%)
31.23MPa
(4.07%)
29.12MPa
(-2.96%)

24. 0
5
10
15
20
25
30
35
40
45
50
7 days 28 days 90 days 180 days 365 days
CcompressiveStrength,MPa
Age
Nano-Silica Addition in Blended Mortar
Ctrl Samp.
Ns=0.5%
nS=0.75%
nS=1.0%
nS=1.25%
nS=1.5%

25. OPTIMIZATION OF NANO-MATERIALS in
PPC
11.36
22.44
23.52
25.07
37.36
32.41
0
5
10
15
20
25
30
35
40
7 day Strength 28 day Strength 365 day Strength
Blended
Cement
Mortar
nS(opt.)

26. OPTIMIZATIONS for Nano Materials are
nS=0.75% for OPC & nS=1.0% for PPC

27. For long term, the presence of Fly ash
enhances DURABILITY & consistency in
optimization results

28. Further research on micro structural
studies like XRD,SEM,AFM,TEM,STM are
necessary for characterization of nano
materials in concrete.