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Study on the effect of nanosilica suspension on the properties of cement-based grouts

Shuiping Li
Shuiping Li
, 
Wei Chao
Wei Chao
, 
Wei Li
Wei Li
, 
Jian Cheng
Jian Cheng
 and 
Bin Yuan
Bin Yuan
   | May 06, 2023
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Published Online: May 06, 2023
Page range: 171 - 182
Received: Jan 28, 2023
Accepted: Mar 23, 2023
DOI: https://doi.org/10.2478/msp-2022-0054
Keywords
© 2022 Shuiping Li et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Picture of suspension for different days. a3—unmodified nanosilica particle solution; b3—nanosilica suspension (γ-(2,3-epoxypropoxy)propytrimethosysilane was used as a silane coupler); c3—nanosilica suspension (methacryloxy propyl trimethoxyl silane was used as a silane coupler)
Picture of suspension for different days. a3—unmodified nanosilica particle solution; b3—nanosilica suspension (γ-(2,3-epoxypropoxy)propytrimethosysilane was used as a silane coupler); c3—nanosilica suspension (methacryloxy propyl trimethoxyl silane was used as a silane coupler)

Fig. 2

The influence of unmodified nanosilica particles on compressive strength of hardened grouts
The influence of unmodified nanosilica particles on compressive strength of hardened grouts

Fig. 3

The influence of nanosilica particles content on the compressive strength of hardened grouts
The influence of nanosilica particles content on the compressive strength of hardened grouts

Fig. 4

The influences of silane ratio in suspension on compressive strength of hardened grouts
The influences of silane ratio in suspension on compressive strength of hardened grouts

Fig. 5

The influences of PCE ratio in suspension on compressive strength of hardened grouts
The influences of PCE ratio in suspension on compressive strength of hardened grouts

Fig. 6

(A) The TG and differential thermal analysis (DTA) curves of specimens with 0 wt% nanosilica particles for 1 day of curing. (B) The TG and DTA curves of specimens with 0.5 wt% nanosilica particles for 1 day of curing. TG, thermogravimetric
(A) The TG and differential thermal analysis (DTA) curves of specimens with 0 wt% nanosilica particles for 1 day of curing. (B) The TG and DTA curves of specimens with 0.5 wt% nanosilica particles for 1 day of curing. TG, thermogravimetric

Fig. 7

(A) The TG and DTA curves of specimens with 0 wt% nanosilica particles for 28 days of curing. (B) The TG and DTA curves of specimens with 0.5 wt% nanosilica particles for 28 days of curing. TG, thermogravimetric
(A) The TG and DTA curves of specimens with 0 wt% nanosilica particles for 28 days of curing. (B) The TG and DTA curves of specimens with 0.5 wt% nanosilica particles for 28 days of curing. TG, thermogravimetric

Fig. 8

(A) The SEM micrographs of cement grouts with 0 wt% nanoparticles for 1 day of curing. (B) The SEM micrographs of cement grouts with 0.5 wt% unmodified nanoparticles for 1 day of curing. (C) The SEM micrographs of cement grouts with 0.5 wt% nanoparticles for 1 day of curing. (D) The SEM micrographs of cement grouts with 0 wt% nanoparticles for 28 days of curing. (E) The SEM micrographs of cement grouts with 0.5 wt% unmodified nanoparticles for 28 days of curing. (F) The SEM micrographs of cement grouts with 0.5 wt% nanoparticles for 28 days of curing
(A) The SEM micrographs of cement grouts with 0 wt% nanoparticles for 1 day of curing. (B) The SEM micrographs of cement grouts with 0.5 wt% unmodified nanoparticles for 1 day of curing. (C) The SEM micrographs of cement grouts with 0.5 wt% nanoparticles for 1 day of curing. (D) The SEM micrographs of cement grouts with 0 wt% nanoparticles for 28 days of curing. (E) The SEM micrographs of cement grouts with 0.5 wt% unmodified nanoparticles for 28 days of curing. (F) The SEM micrographs of cement grouts with 0.5 wt% nanoparticles for 28 days of curing

Chemical composition of Portland cement, fly ash, and slag powder (wt%)

Constituent CaO SiO2 Al2O3 Fe2O3 MgO Na2O SO3 Loss
Cement 63.71 20.35 5.0 3.3 1.37 0.39 2.48 2.6
Fly ash 2.4 61.9 28.8 2.5 0.8 0.3 0.6 1.7
Slag powder 38.1 30.0 13.6 0.6 7.6 0.3 0.3 4.6

Performance indices of Portland cement

Indices Density (g/cm3) Consistence (%) Stability > 80 μm Specific surface area (m2/kg) Setting time (min) Compressive strength (MPa)
1 day 3 days 28 days
Cement 3.08 21.35 Qualified 1.8 340 160 195 22.1 37.4 62.6

The influences of unmodified nanosilica, nanosilica suspension, silane coupler, and PCE content on the setting times of grouting pastes

Composition Content (wt%) Setting time (min)
Initial Final
Reference 0 660 ± 15 750 ± 20
Unmodified nanosilica (nanosilica/binder) 0.2 580 ± 20 660 ± 25
0.5 500 ± 15 570 ± 20
0.8 460 ± 10 540 ± 20
1 410 ± 20 470 ± 15
1.5 340 ± 15 420 ± 20
2 270 ± 10 350 ± 15
Nanosilica suspension (nanosilica/binder) 0.2 640 ± 30 710 ± 25
0.5 590 ± 25 660 ± 20
0.8 560 ± 25 630 ± 15
1 650 ± 30 720 ± 20
1.5 940 ± 40 1,010 ± 35
2 1,590 ± 50 1,660 ± 40
Silane coupler (silane/nanosilica) 0 500 ± 20 580 ± 20
4 540 ± 15 620 ± 15
10 590 ± 20 670 ± 25
20 910 ± 30 990 ± 30
30 1,810 ± 45 1,880 ± 35
PCE (PCE/nanosilica) 0 540 ± 10 620 ± 15
4 560 ± 15 640 ± 20
10 580 ± 20 650 ± 15
20 600 ± 15 670 ± 10
30 620 ± 10 700 ± 20

The effects of unmodified nanosilica, nanosilica suspension, silane coupler, and PCE content on the fluidity of grouting pastes

Composition Content (wt%) Fluidity (mm)
Initial 30 min
Reference 0 350 ± 4 325 ± 3
Unmodified nanosilica (nanosilica/binder) 0.2 355 ± 3 325 ± 5
0.5 335 ± 6 200 ± 2
0.8 280 ± 2 180 ± 3
1.0 250 ± 3 150 ± 4
1.5 200 ± 2 130 ± 4
2.0 150 ± 3 120 ± 2
Nanosilica suspension (nanosilica/binder) 0.2 350 ± 6 345 ± 3
0.5 345 ± 5 335 ± 4
0.8 335 ± 5 320 ± 5
1.0 330 ± 4 300 ± 3
1.5 310 ± 3 200 ± 2
2.0 295 ± 3 165 ± 2
Silane coupler (silane/nanosilica) 0 320 ± 4 230 ± 3
4 330 ± 4 320 ± 2
10 350 ± 3 345 ± 5
20 355 ± 4 355 ± 4
30 355 ± 5 355 ± 3
PCE (PCE/nanosilica) 0 340 ± 3 315 ± 4
4 350 ± 5 325 ± 3
10 355 ± 3 330 ± 2
20 350 ± 4 330 ± 4
30 345 ± 2 330 ± 3
eISSN:
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Language:
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Journal Subjects:
Materials Sciences, other, Nanomaterials, Functional and Smart Materials, Materials Characterization and Properties
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