Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Strength Characteristics of Clayey Sand Stabilized Using Polypropylene Fiber or Portland Cement
https://orcid.org/http://orcid.org/0000-0003-4064-214X
The present study investigates the behavior of clayey sand soils stabilized using either polypropylene fiber or ordinary Portland cement. For this purpose, two homogenous soil mixtures were prepared: (1) Soil A consists of 80% sand and 20% kaolin clay, and (2) Soil B consists of 60% sand and 40% kaolin. The prepared mixtures were reinforced by polypropylene fiber at target ratios of 0.1%, 0.25% and 0.4% by dry weight, or they were stabilized by Portland cement at target ratios of 1%, 2% and 3% by dry weight. A series of compaction tests, direct shear box tests and unconfined compression tests were performed in order to assess the effect of the individual inclusion of fiber or cement on the geotechnical characteristics of clayey sand. It was found that the shear strength of tested sand specimens was positively impacted by the addition of clay as long as the specimens were subjected to low normal stresses. Once the normal stress exceeded about 30 kN/m2, the addition of clay had a detrimental impact on the shear strength. The inclusion of fibers or cement in the clayey sand developed a higher unconfined compressive strength (UCS). However, fibers provide a more ductile compressive performance up to high strains, whereas the cemented samples exhibit a sudden brittle failure. At the same cement (or fiber) content, clayey sand obtains higher values of UCS at higher clay contents.
Strength Characteristics of Clayey Sand Stabilized Using Polypropylene Fiber or Portland Cement
https://orcid.org/http://orcid.org/0000-0003-4064-214X
The present study investigates the behavior of clayey sand soils stabilized using either polypropylene fiber or ordinary Portland cement. For this purpose, two homogenous soil mixtures were prepared: (1) Soil A consists of 80% sand and 20% kaolin clay, and (2) Soil B consists of 60% sand and 40% kaolin. The prepared mixtures were reinforced by polypropylene fiber at target ratios of 0.1%, 0.25% and 0.4% by dry weight, or they were stabilized by Portland cement at target ratios of 1%, 2% and 3% by dry weight. A series of compaction tests, direct shear box tests and unconfined compression tests were performed in order to assess the effect of the individual inclusion of fiber or cement on the geotechnical characteristics of clayey sand. It was found that the shear strength of tested sand specimens was positively impacted by the addition of clay as long as the specimens were subjected to low normal stresses. Once the normal stress exceeded about 30 kN/m2, the addition of clay had a detrimental impact on the shear strength. The inclusion of fibers or cement in the clayey sand developed a higher unconfined compressive strength (UCS). However, fibers provide a more ductile compressive performance up to high strains, whereas the cemented samples exhibit a sudden brittle failure. At the same cement (or fiber) content, clayey sand obtains higher values of UCS at higher clay contents.
Strength Characteristics of Clayey Sand Stabilized Using Polypropylene Fiber or Portland Cement
https://orcid.org/http://orcid.org/0000-0003-4064-214X
The present study investigates the behavior of clayey sand soils stabilized using either polypropylene fiber or ordinary Portland cement. For this purpose, two homogenous soil mixtures were prepared: (1) Soil A consists of 80% sand and 20% kaolin clay, and (2) Soil B consists of 60% sand and 40% kaolin. The prepared mixtures were reinforced by polypropylene fiber at target ratios of 0.1%, 0.25% and 0.4% by dry weight, or they were stabilized by Portland cement at target ratios of 1%, 2% and 3% by dry weight. A series of compaction tests, direct shear box tests and unconfined compression tests were performed in order to assess the effect of the individual inclusion of fiber or cement on the geotechnical characteristics of clayey sand. It was found that the shear strength of tested sand specimens was positively impacted by the addition of clay as long as the specimens were subjected to low normal stresses. Once the normal stress exceeded about 30 kN/m2, the addition of clay had a detrimental impact on the shear strength. The inclusion of fibers or cement in the clayey sand developed a higher unconfined compressive strength (UCS). However, fibers provide a more ductile compressive performance up to high strains, whereas the cemented samples exhibit a sudden brittle failure. At the same cement (or fiber) content, clayey sand obtains higher values of UCS at higher clay contents.
Strength Characteristics of Clayey Sand Stabilized Using Polypropylene Fiber or Portland Cement
Transp. Infrastruct. Geotech.
Bayoumy, Mona (Autor:in) / El Sawwaf, Mostafa (Autor:in) / Nasr, Ahmed (Autor:in) / Elsawwaf, Ahmed (Autor:in)
Transportation Infrastructure Geotechnology ; 11 ; 1249-1271
01.06.2024
23 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Strength Characteristics of Clayey Sand Stabilized Using Polypropylene Fiber or Portland Cement
| Springer Verlag | 2024