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The Impact of Polypropylene Fibre Addition on the CBR Value Cover

The Impact of Polypropylene Fibre Addition on the CBR Value

Architecture, Civil Engineering, Environment
Volume 16 (2023): Issue 2 (June 2023)
By:
Open Access
|Jul 2023

Figures & Tables

Figure 1.

Polypropylene fibres with 18 mm in length in the percentage of 0.1%, 0.2% and 0.3% given to the Proctor mould
Polypropylene fibres with 18 mm in length in the percentage of 0.1%, 0.2% and 0.3% given to the Proctor mould

Figure 2.

Grain-size distribution curves for tested soil samples
Grain-size distribution curves for tested soil samples

Figure 3.

Compaction curves of test samples I and II by both compaction method: standard Proctor (SP) and modified (MP)
Compaction curves of test samples I and II by both compaction method: standard Proctor (SP) and modified (MP)

Figure 4.

Compaction curves of grSa with additions of 1.5% cement and 0.2% or 0.3% of fibres by: (a) SP, and (b) MP methods
Compaction curves of grSa with additions of 1.5% cement and 0.2% or 0.3% of fibres by: (a) SP, and (b) MP methods

Figure 5.

Samples during CBR tests without and with an additional load of 2.44 kPa
Samples during CBR tests without and with an additional load of 2.44 kPa

Figure 6.

Dependence of the CBR values on the percentage addition of fibres for both compaction methods for sample II
Dependence of the CBR values on the percentage addition of fibres for both compaction methods for sample II

Figure 7.

Relation of the CBR values on the percentage cement addition for both compaction methods: a) the standard Proctor, b) the modified Proctor
Relation of the CBR values on the percentage cement addition for both compaction methods: a) the standard Proctor, b) the modified Proctor

Geotechnical parameters of the investigated soil

Sample numberMaterialρs (g/cm3)Compaction method
Standard ProctorModified Proctor
wopt (%)ρd max (g/cm3)wopt (%)ρd max (g/cm3)
IgrSa2.659.002.0208.502.085
grSa+1.5%C2.668.902.1208.402.130
grSa+3.0%C2.668.802.1408.302.150
grSa+4.5%C2.678.702.1708.102.176
grSa+6.5%C2.688.502.1827.902.190
IIgrSa2.659.701.9749,602.022
grSa+0.1%F 18 mm2.659.802.0038.802.104
grSa+0.2%F 18 mm2.658.002.0547.502.158
grSa+0.3%F 18 mm2.657.702.0607.002.160
grSa+1.5%C2.669.502.0109.502.070
grSa+1.5%C+0.2%F 18 mm2.667.902.0667.002.183
grSa+1.5%C+0.3%F 18 mm2.668.002.0607.802.124

Results of the California Bearing Ratio test

Sample numberMaterialCuring time (days)CBR (%)
Standard ProctorModified Proctor
UnloadedLoaded 2.44 kPaUnloadedLoaded 2.44 kPa
IgrSa040.843.358.299.5
grSa+1.5%C0–11.0–28.0
7–110.6–84.6
28–241.5–212.1
grSa+3.0%C0–22.72–33.20
grSa+4.5%C0–31.21–35.99
grSa+6.0%C0–38.50–44.93
IIgrSa019.821.053.968.3
grSa+0.1%F 18 mm0–47.7–58.8
grSa+0.2%F 18 mm0–47.5–71.7
grSa+0.3%F 18 mm0–39.7–64.5
grSa+1.5%C031.536.165.561.2
7–195.9–205.1
28–166.8–303.9
grSa+1.5%C+0.3%F 18 mm0–77.5–154.5
7–310.5–276.5
28–319.6–359.6
DOI: https://doi.org/10.2478/acee-2023-0017 | Journal eISSN: 2720-6947 | Journal ISSN: 1899-0142
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Language: English
Page range: 81 - 88
Submitted on: Jan 15, 2023
Accepted on: Mar 17, 2023
Published on: Jul 20, 2023
Published by: Silesian University of Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 times per year
Keywords:
California Bearing Ratio,
Cement stabilisation,
Polypropylene fibres,
Soil compaction
Related subjects:
Architecture and design,
Architecture,
Architects, buildings

© 2023 Patryk Dobrzycki, published by Silesian University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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