Improving Physical and Mechanical Properties of Expansive Subgrade with Construction and Demolition Waste

Muhammed Tanyıldızı

doi:10.54287/gujsa.1880043

Improving Physical and Mechanical Properties of Expansive Subgrade with Construction and Demolition Waste

Abstract

Expansive subgrades are considered problematic soils in road pavements due to their poor engineering performance. This paper investigated the stabilization of an expansive subgrade with construction and demolition waste (CDW). In this regard, the soil was substituted with CDW in ratios of 4%, 8%, 12%, 16% and 20% and several experimental tests, involving consistency limits, swelling/shrinkage, compaction, unconfined compressive strength (UCS) and California bearing ratio (CBR) were performed on soil samples. In addition, a Pearson correlation matrix was constructed to indicate the degree of relationship between the investigated experimental parameters. The test results revealed that plasticity and swelling/shrinkage potentials of expansive subgrade decreased significantly with the increase of CDW content. The soil’s maximum dry density (MDD) increased, whereas the optimum moisture content (OMC) was reduced continuously with CDW. The UCS and CBR of expansive subgrade with a 20% CDW content improved by 122.43% and 434.22% after curing for 28 days, respectively. The findings highlight that CDW can be utilized in expansive subgrade stabilization as a sustainable alternative in greener road construction.

Keywords

References

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Details

Primary Language

English

Subjects

Civil Geotechnical Engineering

Journal Section

Research Article

Authors

Muhammed Tanyıldızı ^*
0000-0002-8507-2825
Türkiye

Publication Date

June 30, 2026

Submission Date

February 2, 2026

Acceptance Date

March 27, 2026

Published in Issue

Year 2026 Volume: 13 Number: 2

DOI

https://doi.org/10.54287/gujsa.1880043

IZ

https://izlik.org/JA35JG23LY

Cite

RIS / Bibtex

APA

Tanyıldızı, M. (2026). Improving Physical and Mechanical Properties of Expansive Subgrade with Construction and Demolition Waste. Gazi University Journal of Science Part A: Engineering and Innovation, 13(2), 614-627. https://doi.org/10.54287/gujsa.1880043

AMA

1.Tanyıldızı M. Improving Physical and Mechanical Properties of Expansive Subgrade with Construction and Demolition Waste. GU J Sci, Part A. 2026;13(2):614-627. doi:10.54287/gujsa.1880043

Chicago

Tanyıldızı, Muhammed. 2026. “Improving Physical and Mechanical Properties of Expansive Subgrade With Construction and Demolition Waste”. Gazi University Journal of Science Part A: Engineering and Innovation 13 (2): 614-27. https://doi.org/10.54287/gujsa.1880043.

EndNote

Tanyıldızı M (June 1, 2026) Improving Physical and Mechanical Properties of Expansive Subgrade with Construction and Demolition Waste. Gazi University Journal of Science Part A: Engineering and Innovation 13 2 614–627.

IEEE

[1]M. Tanyıldızı, “Improving Physical and Mechanical Properties of Expansive Subgrade with Construction and Demolition Waste”, GU J Sci, Part A, vol. 13, no. 2, pp. 614–627, June 2026, doi: 10.54287/gujsa.1880043.

ISNAD

Tanyıldızı, Muhammed. “Improving Physical and Mechanical Properties of Expansive Subgrade With Construction and Demolition Waste”. Gazi University Journal of Science Part A: Engineering and Innovation 13/2 (June 1, 2026): 614-627. https://doi.org/10.54287/gujsa.1880043.

JAMA

1.Tanyıldızı M. Improving Physical and Mechanical Properties of Expansive Subgrade with Construction and Demolition Waste. GU J Sci, Part A. 2026;13:614–627.

MLA

Tanyıldızı, Muhammed. “Improving Physical and Mechanical Properties of Expansive Subgrade With Construction and Demolition Waste”. Gazi University Journal of Science Part A: Engineering and Innovation, vol. 13, no. 2, June 2026, pp. 614-27, doi:10.54287/gujsa.1880043.

Vancouver

1.Muhammed Tanyıldızı. Improving Physical and Mechanical Properties of Expansive Subgrade with Construction and Demolition Waste. GU J Sci, Part A. 2026 Jun. 1;13(2):614-27. doi:10.54287/gujsa.1880043