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Analysis of fire resistance of ethylene-vinyl acetate polymer calcium sulfoaluminate cement mortars

Zihao Li

Zihao Li

Shandong Provincial Key Laboratory of Green and Intelligent Building Materials, University of JinanShandong, China
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Li, Zihao
, 
Jean Jacques Kouadjo Tchekwagep

Jean Jacques Kouadjo Tchekwagep

Shandong Provincial Key Laboratory of Green and Intelligent Building Materials, University of JinanShandong, China
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Kouadjo Tchekwagep, Jean Jacques
, 
Shifeng Huang

Shifeng Huang

Shandong Provincial Key Laboratory of Green and Intelligent Building Materials, University of JinanShandong, China
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Huang, Shifeng
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Shoude Wang

Shoude Wang

Shandong Provincial Key Laboratory of Green and Intelligent Building Materials, University of JinanShandong, China
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Wang, Shoude
, 
Ning Ding

Ning Ding

Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test CenterJinan, China
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Ding, Ning
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Herve Kouamo Tchakouté

Herve Kouamo Tchakouté

Laboratory of Analytical Electrochemistry and Materials Engineering, Department of Inorganic Chemistry, Faculty of Sciences, University of YaoundéYaoundé, Cameroon
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Tchakouté, Herve Kouamo
  
30. Juni 2025
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Artikel-Kategorie: Research Article
Online veröffentlicht: 30. Juni 2025
Seitenbereich: 87 - 100
Eingereicht: 27. März 2025
Akzeptiert: 29. Juni 2025
DOI: https://doi.org/10.2478/msp-2025-0021
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© 2025 Zihao Li, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Preparation and curing of EVA PMCSAC mortar specimens.
Preparation and curing of EVA PMCSAC mortar specimens.

Figure 2

Thermographic images of the start of the fire. Resistance to direct fire test and temperature were measured using an infrared thermometer.
Thermographic images of the start of the fire. Resistance to direct fire test and temperature were measured using an infrared thermometer.

Figure 3

UPV values of EVA PMCSAC mortars.
UPV values of EVA PMCSAC mortars.

Figure 4

Flexural and compressive strength of the EVA PMCSAC mortars after direct fire exposure.
Flexural and compressive strength of the EVA PMCSAC mortars after direct fire exposure.

Figure 5

Thermal characteristics of the EVA PMCSAC mortars.
Thermal characteristics of the EVA PMCSAC mortars.

Figure 6

Water saturation of the EVA PMCSAC after direct fire exposure.
Water saturation of the EVA PMCSAC after direct fire exposure.

Figure 7

(a) Log differential intrusion volume in mL/g and (b) the cumulative intrusion volume.
(a) Log differential intrusion volume in mL/g and (b) the cumulative intrusion volume.

Figure 8

SEM observations of different EVA PMCSAC mortars.
SEM observations of different EVA PMCSAC mortars.

j_msp-2025-0021_tab_004

Oxide SiO2 Al2O2 Fe2O3 MgO SO3 Na2O K2O Cao Specific gravity
Compositions (g/cm3) 3.1
Weight (%) 7.5 35 1.5 — 15.5 — — 41.0
Mineralogical phase composition C2S C4A3$ C11A7F CaSO4 Fluor-elpasolite Others Specific surface (m2/kg)
450
Weight (%) 18 60 4.4 9.9 4.5 3.2

Summary of the MIP testing of EVA PMCSAC mortars_

Group Average values parameters
Total intrusion volume (mL/g) Total pore area (m2/g) Median pore diameter (nm) Tortuosity (%)
0% EVA added 0.147 10.87 13.22 3.00
1% EVA added 0.170 9.26 13.36 3.48
2% EVA added 0.171 10.69 11.36 17.20
3% EVA added 0.170 9.39 10.36 3.72

Mixing of the EVA PMCSAC mortar samples_

Number of samples CSAC (g) Sand (g) EVA content (%) Water (g) Water reducer (%)
A 450 1,350 0 225 0.5
B 450 1,350 1.0 225 0.4
C 450 1,350 2.0 225 0.3
D 450 1,350 3.0 225 0.2

Compressive and flexural strength analysis of EVA-enhanced CSAC mortars following direct fire exposure_

Sample group Mean compressive strength Std. Dev. compressive Confidence interval Mean flexural strength Std. Dev. flexural Flexural confidence interval
0% EVA (Control, Sample A) 15.2585 2.2574 (12.9605, 17.5565) 4.228 0.5764 (3.663, 4.793)
1% EVA (Sample B) 11.8875 2.7735 (9.5886, 14.1864) 3.2668 0.1638 (3.2516, 3.2804)
2% EVA (Sample C) 13.1567 3.2475 (10.4839, 15.8295) 5.6865 0.8920 (4.6680, 6.7040)
3% EVA (Sample D) 10.7400 3.3218 (8.0790, 13.4010) 3.3040 0.2213 (3.2281, 3.3799)
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