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The influence of nano-SiO2 emulsion on sulfate resistance of cement-based grouts

Shuiping Li
Shuiping Li
, 
Bin Yuan
Bin Yuan
, 
Jian Cheng
Jian Cheng
, 
Xiaocheng Yu
Xiaocheng Yu
, 
Chao Wei
Chao Wei
, 
Qisheng Wu
Qisheng Wu
 e 
Youchao Zhang
Youchao Zhang
   | 22 mag 2024
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Pubblicato online: 22 mag 2024
Pagine: 116 - 125
Ricevuto: 01 gen 2024
Accettato: 09 mar 2024
DOI: https://doi.org/10.2478/msp-2024-0010
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© 2024 Shuiping Li et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1a.

The compressive strength of cement-based grouts determined after 28 days of 0.5% and 10% sodium sulfate solution exposure
The compressive strength of cement-based grouts determined after 28 days of 0.5% and 10% sodium sulfate solution exposure

Fig. 1b.

The compressive strength of cement-based grouts determined after 56 days of 0.5% and 10% sodium sulfate solution exposure
The compressive strength of cement-based grouts determined after 56 days of 0.5% and 10% sodium sulfate solution exposure

Fig. 1c.

The compressive strength of cement-based grouts determined after 90 days of 0.5% and 10% sodium sulfate solution exposure
The compressive strength of cement-based grouts determined after 90 days of 0.5% and 10% sodium sulfate solution exposure

Fig. 2.

The weight loss of cement-based grouts determined after 28, 56, and 90 days of 5% sodium sulfate solution exposure
The weight loss of cement-based grouts determined after 28, 56, and 90 days of 5% sodium sulfate solution exposure

Fig. 3.

The weight loss of cement-based grouts determined after 28, 56, and 90 days of 10% sodium sulfate solution exposure
The weight loss of cement-based grouts determined after 28, 56, and 90 days of 10% sodium sulfate solution exposure

Fig. 4.

XRD patterns of control and 16NSE samples
XRD patterns of control and 16NSE samples

Fig. 5a.

SEM image of control sample determined after 90 days of 10% chloride solution exposure
SEM image of control sample determined after 90 days of 10% chloride solution exposure

Fig. 5b.

SEM image of NSP sample determined after 90 days of 10% chloride solution exposure
SEM image of NSP sample determined after 90 days of 10% chloride solution exposure

Fig. 5c.

SEM image of 10NSE sample determined after 90 days of 10% chloride solution exposure
SEM image of 10NSE sample determined after 90 days of 10% chloride solution exposure

Fig. 5d.

SEM image of 16NSE sample determined after 90 days of 10% chloride solution exposure
SEM image of 16NSE sample determined after 90 days of 10% chloride solution exposure

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

Constituent CaO SiO2 Al2O3 Fe2O3 MgO Na2O SO3 Loss
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
Cement 63.71 20.35 5.0 3.3 1.37 0.39 2.48 2.6

Mixing ratios of raw materials for cement-based grouts (g)

Sample Cement water FA Slag sand PCE P80 YH-S NS particle NS emulsion
Control 700 220 200 100 1000 5 1 0.5 0 0
NSP 700 170 200 100 1000 5 1 0.5 5 0
10NSE 700 170 200 100 1000 5 1 0.5 0 56.2
16NSE 700 140 200 100 1000 5 1 0.5 0 89.92

Performance indices of Portland cement

Indices Density (g/cm3) Specific surface area (m2/kg) Setting time (min) Initial Final Compressive strength (MPa)
1d 3d 28d
Cement 3.08 340 160 195 22.1 37.4 62.6
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