Influence of elevated temperature on the engineering properties of ultra-high-performance fiber-reinforced concrete

Abadel, Aref A.; Khan, M. Iqbal; Masmoudi, Radhouane

Influence of elevated temperature on the engineering properties of ultra-high-performance fiber-reinforced concrete

Materials Science-Poland

Volume 41 (2023): Issue 1 (March 2023)

By:

Aref A. Abadel, M. Iqbal Khan and Radhouane Masmoudi

Open Access

|Aug 2023

Figures & Tables

Fibers: (A) hooked-steel fibers; (B) polyvinyl alcohol fibers (C) polypropylene fibers

Destroyed concrete specimen from 500°C exposure

Representative samples after compression testing: (A) 100°C; (B) 300°C (C) 400°C

Stress-strain relations for UHPFRC cylinders at ambient temperature

Stress-strain relations for UHPFRC cylinders at 300°C

Stress-strain relations for UHPFRC cylinders at 400°C

Load-deflection relations for UHPC and UH-PFRC beams (room temp. 26°C)

Load-deflection relations for UHPC and UH-PFRC beams (300°C)

Load-deflection relations for UHPC and UH-PFRC beams (400°C)

Mode of failure of some representative concrete prisms

Temperature effects on UHPC and UHPFRC normalized compressive strength

Temperature effects on the normalized splitting tensile strength of UHPC and UHPFRC

Temperature effects on the normalized flexural strength of UHPC and UHPFRC

Effect of temperature on weight loss for UHPC and UHFRC specimens

Secondary electron SEM images of concrete exposed to room temperature (a) mix M0-NF, (b) M1-S1, and (c) M3-S0.5+PVA0.5

Secondary electron SEM images of concrete containing steel fibers (i.e., M1-S1) after exposure to 400°C

Secondary electron SEM images of concrete containing PVA fibers (i.e., M3-S0.7-PVA0.2-PP0.1) after exposure to 400°C

Properties of fibers

Fiber type	Fiber properties
Fiber type	Shape	Length (mm)	Section dimension (mm)	Specific gravity	Modulus of elasticity (GPa)	Tensile strength (MPa)
Steel fibers	Hooked ends	35	φ 0.55 (Circular)	7.85	210	1225
Polyvinyl alcohol (PVA)	straight	30	φ 0.66 (Circular)	1.3	23	900
Polypropylene (PP)	straight	12	φ 0.022 (Circular)	0.90	4	550

UHPC mixture proportions for 1 m3

Material	Weight (kg/m³)
Cement	900.0
Fine quartz sand	1000.0
Silica Fume	222.0
Water	164.0
Super-plasticizer	30

Fresh UHPC properties

Mix No.	Unit Weight (kg/m³)	Slump (mm)
M0-NF	2318	280.0
M1-S1	2363	257.0
M2-S0.7-PVA0.3	2325	256.0
M3-S0.7-PVA0.2-PP0.1	2294	250.0
M4-S0.7-PVA0.2	2310	255.0
M5-S0.5-PVA0.5	2285	251.0

Details of test matrix

Mix	Compression and split Test				Flexure Test
Mix	Room temp.	100°C	300°C	400°C	Room temp.	100°C	300°C	400°C
M0-NF	6	6	6	6	3	3	3	3
M1-S1	6	6	6	6	3	3	3	3
M2-S0.7-PVA0.3	6	6	6	6	3	3	3	3
M3-S0.7-PVA0.2-PP0.1	6	6	6	6	3	3	3	3
M4-S0.7-PVA0.2	6	6	6	6	3	3	3	3
M5-S0.5-PVA0.5	6	6	6	6	3	3	3	3

Summary of test results of different concrete mixes

Mix	Compressive strength (MPa)				Flexure strength (MPa)				Splitting strength (MPa)
Mix	Room temp.	100°C	300°C	400°C	Room temp.	100°C	300°C	400°C	Room temp.	100°C	300°C	400°C
M0-NF	120.3	124.1(+3%)	105.6(–12.5%)	88.32(–26.6%)	10.27	10.47	8.77(–15.1%)	7.50(–27.0%)	6.6	6.8(+3%)	5.7(–13.6%)	4.80(–27.3%)
M1-S1	139.8(16.2%)	143.8(+2.9%)	132.0(–5.5%)	104.68(–25.12%)	19.50(89.9%)	19.75	17.83(–9.0%)	16.20(–17.0%)	11.7(77.3%)	11.9(+3%)	10.8(–7.7%)	10.20(–12.8%)
M2-S0.7-PVA0.3	134.6(11.8%)	139.4(+3.6%)	123.4(–8.5%)	110.19(–18.2%)	19.00(85%)	19.53	17.24(–9.0%)	15.10(–20.5%)	12.3(86.4%)	12.7(+3%)	11.9(–3.3%)	10.70(–13%)
M3-S0.7-PVA0.2-PP0.1	131.7(9.5%)	133.7(+1%)	129.7(–1.0%)	102.62(–21.5%)	17.03(65.8%)	17.64	16.00(–6.0%)	15.20(–10.7%)	12.1(83.3%)	12.4(+3%)	11.4(–5.8%)	10.40(–14%)
M4-S0.7-PVA0.2	128.2(6.8%)	130.3(+1%)	124.0(–3.3%)	99.70(–22.3%)	17.77(73%)	17.85	17.01(–4.0%)	14.20(–20.0%)	11.7(77.3%)	11.8(+3%)	10.9(–6.8%)	9.50(–18.8%)
M5-S0.5-PVA0.5	127.8(6.5%)	131.8(+3.2%)	119.6(–6.4%)	97.4(–23.7%)	16.90(64.5%)	17.0	15.85(–6.0%)	12.90(–25.0%)	11.3(74.2%)	11.8(+3%)	10.8(–6.1%)	8.90(–22.6%)

Cement and silica fume properties

		Type 1 Cement	Silica Fume
Chemical composition (%)	CaO	64.1	2.15
	SiO₂	21.8	89.5
	AL₂O₃	5.25	0.43
	Fe₂O₃	4.10	3.25
	MgO	0.71	1.30
	TiO₂	0.3	0.0
	SO3	2.4	0.74
Physical properties	L.O.I	2.18	2.47
	Mean particle size (μm)	40.1	0.32
	Specific gravity	3.15	2.2

Percentage of fibers in concrete mixes

Concrete mix	Fiber by volume (%)
Concrete mix	Polyvinyl alcohol (PVA)	Polypropylene (PP)	Steel fibers (SF)
M0-NF	0.0	0.0	0.0
M1-S1	0.0	0.0	1.0
M2-S0.7-PVA0.3	0.3	0.0	0.7
M3-S0.7-PVA0.2-PP0.1	0.2	0.1	0.7
M4-S0.7-PVA0.2	0.2	0.0	0.7
M5-S0.5-PVA0.5	0.5	0.0	0.5

DOI: https://doi.org/10.2478/msp-2023-0010 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331

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Language: English

Page range: 140 - 160

Submitted on: Mar 27, 2023

Accepted on: Jun 7, 2023

Published on: Aug 4, 2023

Published by: Sciendo

In partnership with: Paradigm Publishing Services

Publication frequency: 4 times per year

Keywords:

UHPC,

UHPFRC,

fibers,

concrete,

mechanical properties,

high temperature

Related subjects:

Materials sciences,

Materials sciences, other,

Nanomaterials,

Functional and smart materials,

Materials characterization and properties

© 2023 Aref A. Abadel, M. Iqbal Khan, Radhouane Masmoudi, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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Influence of elevated temperature on the engineering properties of ultra-high-performance fiber-reinforced concrete

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Properties of fibers

UHPC mixture proportions for 1 m3

Fresh UHPC properties

Details of test matrix

Summary of test results of different concrete mixes

Cement and silica fume properties

Percentage of fibers in concrete mixes

Paradigm

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