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The effect of varied types of steel fibers on the performance of self-compacting concrete modified with volcanic pumice powder Cover

The effect of varied types of steel fibers on the performance of self-compacting concrete modified with volcanic pumice powder

Materials Science-Poland
Volume 39 (2021): Issue 2 (June 2021)
By: Hassan M. Magbool and  Abdullah M. Zeyad  
Open Access
|Oct 2021

Figures & Tables

Fig. 1

The VPP used in this research. VPP, volcanic pumice powder.
The VPP used in this research. VPP, volcanic pumice powder.

Fig. 2

Sieve analysis of cement and VPP. VPP, volcanic pumice powder.
Sieve analysis of cement and VPP. VPP, volcanic pumice powder.

Fig. 3

Sieve analysis aggregate (A) for sand and (B) for gravel.
Sieve analysis aggregate (A) for sand and (B) for gravel.

Fig. 4

Test setups for evaluating mechanical properties of concrete: (A) compression test; (B) indirect tensile; (C) flexural strength test.
Test setups for evaluating mechanical properties of concrete: (A) compression test; (B) indirect tensile; (C) flexural strength test.

Fig. 5

Results of bleeding and segregation test of all concrete mixtures. SCC, self-compacting concrete; SCF, fiber-reinforced SCC.
Results of bleeding and segregation test of all concrete mixtures. SCC, self-compacting concrete; SCF, fiber-reinforced SCC.

Fig. 6

Relationship between results of segregation and bleeding results.
Relationship between results of segregation and bleeding results.

Fig. 7

Compressive strength of all mixtures at different ages. SCC, self-compacting concrete; SCF, fiber-reinforced SCC.
Compressive strength of all mixtures at different ages. SCC, self-compacting concrete; SCF, fiber-reinforced SCC.

Fig. 8

Indirect tensile strength for all mixtures at different ages. SCC, self-compacting concrete; SCF, fiber-reinforced SCC.
Indirect tensile strength for all mixtures at different ages. SCC, self-compacting concrete; SCF, fiber-reinforced SCC.

Fig. 9

Relationship between results of compressive and indirect tensile strength.
Relationship between results of compressive and indirect tensile strength.

Fig. 10

Flexural toughness indices according to ASTM C 1018 [35].
Flexural toughness indices according to ASTM C 1018 [35].

Fig. 11

Flexural load–deflection curve of all concrete mixtures. SCC, self-compacting concrete; SCF, fiber-reinforced SCC.
Flexural load–deflection curve of all concrete mixtures. SCC, self-compacting concrete; SCF, fiber-reinforced SCC.

Fig. 12

First-crack loads and areas under the curve comparison of all concrete mixtures: (A) first-crack load; (B) first-crack deflection; (C) area under the curve of δ; (D) area under the curve of 3.5δ; (E) area under the curve of 5.5δ; (F) area under the curve of 10.5δ.
First-crack loads and areas under the curve comparison of all concrete mixtures: (A) first-crack load; (B) first-crack deflection; (C) area under the curve of δ; (D) area under the curve of 3.5δ; (E) area under the curve of 5.5δ; (F) area under the curve of 10.5δ.

Fig. 13

Toughness indices and residual strength factors comparison of all concrete mixtures: (A) toughness index – I5; (B) toughness index – I10; (C) toughness index – I20; (D) residual strength – R5,10; (E) residual strength – R10,20.
Toughness indices and residual strength factors comparison of all concrete mixtures: (A) toughness index – I5; (B) toughness index – I10; (C) toughness index – I20; (D) residual strength – R5,10; (E) residual strength – R10,20.

Fig. 14

Flexural toughness indices according to ACI 544 [45].
Flexural toughness indices according to ACI 544 [45].

Fig. 15

Toughness indices comparison of all concrete mixtures. SCF, fiber-reinforced SCC.
Toughness indices comparison of all concrete mixtures. SCF, fiber-reinforced SCC.

Physical properties of VPP and cement_

PropertyVPPCement
Relative density2.613.10
Surface area (cm2/g) Blaine method3.9703.530
Median diameter (μm)6.39.2

Chemical composition of VPP and cement_

OxideVPP %Cement %
SiO246.520.05
Al2O317.594.93
Fe2O37.333.90
CaO12.5261.57
MgO6.940.81
Na2O2.580.08
TiO21.410.24
K2O1.171.33
P2O50.710.08
SO30.423.06
MnO0.140.19
Cl0.01–
LOI1.612.10
SiO2 + Al2O3 + Fe2O376.01–

The SCC mixtures fresh state characteristics_

MixtureL-boxSlump flowSegregationBleedingDensity
Ratio(mm)%(ml/cm2)(kg/m3)
SCC0.926909.60.212,336
SCF1Restricted4506.30.192,269
SCF2Restricted4806.50.182,321
SCF3Restricted5205.40.162,315
SCF4Restricted4906.80.122,276
SCF5Restricted4807.40.122,304
SCF6Restricted5105.90.152,219

The absorption and porosity of SCC mixtures_

SCCSCF1SCF2SCF3SCF4SCF5SCF6
Porosity %1516.1016.0216.9016.3016.7418.12
Absorption %7.337.647.427.887.717.849.03

Copolymer-based SP properties_

PropertiesInformation
Chemical baseModified polycarboxylate in water
ColorLiquid/turbid to light yellowish
Density1.070 (20°C)
Chloride ion content<0.1% w/w
Alkaligehalte<0.5% w/w

Physical properties of VPD and cement_

SF
Item
Hooked end SF1Flat end SF2Hooked end SF3Micro SF4Micro SF5
Specific gravity7.857.857.857.857.85
Length (mm)6050302113
Diameter (deq) (mm)0.920.90.550.350.2
Aspect ratio6556556065
Young’s modulus (Es) (GPa)210210210200200
Tensile strength (ft) (MPa)1,1601,1601,1601,100–1,3001,100–1,300

Properties of concrete mixture_

MixtureCementVPPGravelSandSF1SF2SF3SF4SF5WaterSP
(kg/m3)
SCC350150801822–––––2206.5
SCF135015080179578.4––––2206.5
SCF2350150801795–78.4–––2206.5
SCF3350150801795––78.4––2206.5
SCF4350150801795–––78.4–2206.5
SCF5350150801795––––78.42206.5
SCF635015080179515.615.615.615.615.62206.5
DOI: https://doi.org/10.2478/msp-2021-0016 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
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Language: English
Page range: 172 - 187
Submitted on: Jun 1, 2021
Accepted on: Jul 22, 2021
Published on: Oct 1, 2021
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
self-compacting concrete,
steel fiber,
volcanic pumice powder,
aspect ratios,
workability,
mechanical properties
Related subjects:
Materials sciences,
Materials sciences, other,
Nanomaterials,
Functional and smart materials,
Materials characterization and properties

© 2021 Hassan M. Magbool, Abdullah M. Zeyad, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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