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Comparative study on different methods of activation of recycled powder grouts

Shuiping Li

Shuiping Li

College of Architectural Science and Engineering, Yangzhou UniversityYangzhou, P. R. China
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Li, Shuiping
, 
Jian Chen

Jian Chen

College of Architectural Science and Engineering, Yangzhou UniversityYangzhou, P. R. China
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Chen, Jian
, 
Jincheng Jiang

Jincheng Jiang

College of Architectural Science and Engineering, Yangzhou UniversityYangzhou, P. R. China
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Jiang, Jincheng
, 
Chengxiao Yu

Chengxiao Yu

College of Architectural Science and Engineering, Yangzhou UniversityYangzhou, P. R. China
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Yu, Chengxiao
, 
Bin Yuan

Bin Yuan

College of Architectural Science and Engineering, Yangzhou UniversityYangzhou, P. R. China
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Yuan, Bin
, 
Qing Lin

Qing Lin

School of Materials Engineering, Jinling Institute of TechnologyNanjing, P. R. China
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Lin, Qing
 and 
Qisheng Wu

Qisheng Wu

School of Materials Science and Engineering, Yancheng Institute of TechnologyYancheng, P. R. China
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Wu, Qisheng
  
Dec 14, 2024
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Article Category: Research Article
Published Online: Dec 14, 2024
Page range: 21 - 33
Received: Sep 18, 2024
Accepted: Nov 21, 2024
DOI: https://doi.org/10.2478/msp-2024-0043
Keywords
© 2024 the Shuiping Li et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

SEM image of RP.
SEM image of RP.

Figure 2

Particle size distribution of RP.
Particle size distribution of RP.

Scheme 1

Chemical structure and composition of DEIPA and TIPA.
Chemical structure and composition of DEIPA and TIPA.

Figure 3

Influence of RP content on the fluidity of cement-based grouts.
Influence of RP content on the fluidity of cement-based grouts.

Figure 4

Compressive strength of grouts with different contents of RP.
Compressive strength of grouts with different contents of RP.

Figure 5

Influence of activation modes on the fluidity of RP grouts.
Influence of activation modes on the fluidity of RP grouts.

Figure 6

Influence of activation modes on the compressive strength of grouts.
Influence of activation modes on the compressive strength of grouts.

Figure 7

XRD patterns of hardened samples of RP activated by different methods at 1 (a) and 28 (b) days.
XRD patterns of hardened samples of RP activated by different methods at 1 (a) and 28 (b) days.

Figure 8

SEM images of samples S1 (a), S2 (b), S4 (c), S5 (d), S6 (e), S7 (f), S8 (g), and S9 (h) at 1 day.
SEM images of samples S1 (a), S2 (b), S4 (c), S5 (d), S6 (e), S7 (f), S8 (g), and S9 (h) at 1 day.

Figure 9

SEM images of samples S1 (a), S2 (b), S4 (c), S5 (d), S6 (e), S7 (f), S8 (g), and S9 (h) at 28 days.
SEM images of samples S1 (a), S2 (b), S4 (c), S5 (d), S6 (e), S7 (f), S8 (g), and S9 (h) at 28 days.

Mix design and group number of RP grouts_

Sample w/c C/S Cement (%) RP (%) P540 (%) P80 (%) YH-S (%) Activator
S1 0.22 1 60 40 0.7 0.1 0.05 —
S2 0.22 1 60 40 0.7 0.1 0.05 1% NaOH
S3 0.22 1 60 40 0.7 0.1 0.05 1% Na2CO3
S4 0.22 1 60 40 0.7 0.1 0.05 1% CH
S5 0.22 1 60 40 0.7 0.1 0.05 0.04% DEIPA
S6 0.22 1 60 40 0.7 0.1 0.05 0.25% TIPA
S7 0.22 1 60 40 0.7 0.1 0.05 700°C
S8 0.22 1 60 40 0.7 0.1 0.05 700°C + 1% CH + 0.04% DEIPA
S9 0.22 1 60 40 0.7 0.1 0.05 700°C + 0.04% DEIPA + 0.25% TIPA

Chemical composition of RP and cement (wt%)_

Composition CaO Al2O3 SiO2 MgO Fe2O3 Na2O TiO2 SO3 Loss
RP 40.48 7.6 42.56 2.4 4.4 0.38 0.76 — 1.42
cement 63.71 5.0 20.35 1.37 3.3 0.39 — 2.48 2.6
Language:
English
Publication timeframe:
4 times per year
Journal Subjects:
Materials Sciences, Materials Sciences, other, Nanomaterials, Functional and Smart Materials, Materials Characterization and Properties
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