Ali Firat Cabalar (Author), Nurullah Akbulut (Author)

Abstract

This study aims to investigate the effects of some physical properties of sands (e.g., size and shape) on the hydraulic conductivity (k). The paper presents the results of an extensive series of experimental investigations performed using sands with different sizes and particle shapes. Three different particle size ranges (0.60- 1.18 mm, 1.18- 2.00 mm, and 0.075- 2.00 mm) of sands (i. Crushed Stone Sand, CSS; ii. Trakya Sand, TS; iii. Narli Sand, NS; iv. Fly Ash Pellets, FAP; v. Leighton Buzzard Sand, LBS) having distinct shapes, including roundness, R, and sphericity, S (Ri=0.15, Si=0.55; Rii=0.43, Sii=0.67; Riii=0.72, Siii=0.79; Riv=0.65, Siv=0.89; Rv=0.78 Sv=0.65) were tested in a constant-head permeability testing apparatus at a relative density (Dr) of about 35% and constant room temperature (20°C). The experimental results showed that the sands having different shapes (R, S) with the same size and gradation characteristics (cc , cu , D10 , D30 , D50 , D60) result in different k values. The scanning electron microscope (SEM) images indicate the physical differences/similarities among the sands used during this investigation. A comparative study of the tests results and the estimated hydraulic conductivity values using empirical equations previously developed for the hydraulic conductivity prediction of soils by certain researchers are presented.

Keywords

sand;shape;size;hydraulic conductivity;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
UDC: 624.13
COBISS: 302960896 Link will open in a new window
ISSN: 1854-0171
Parent publication: Acta geotechnica Slovenica
Views: 770
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Other data

Secondary language: Slovenian
Secondary title: Vpliv oblike in velikosti zrn peskov na hidravlično prepustnost
Secondary abstract: Cilj pričujoče študije je preiskati vpliv nekaterih fizikalnih lastnosti peskov (npr., velikost, oblika) na hidravlično prepustnost (k). Članek prikazuje rezultate obsežnih eksperimentalnih preiskav izvedenih z uporabo zrn peskov različnih velikosti in oblik. Preiskana so bila tri različna območja velikosti zrn (0.60 mm - 1.18 mm, 1.18 mm - 2.00 mm in 0.075 mm - 2.00 mm) peskov (i. drobljeni kamniti pesek, CSS; ii. pesek Trakya, TS; iii. pesek Narli, NS; iv. peleti elektrofiltrskega pepela, FAP; v. pesek Leighton Buzzard, LBS) z različnimi oblikami, vključno z okroglostjo, R, in sferičnostjo, S (Ri=0.15, Si=0.55; Rii=0.43, Sii=0.67; Riii=0.72, Siii=0.79; Riv=0.65, Siv=0.89; Rv=0.78 Sv=0.65) v aparatu za določitev koeficienta prepustnosti s konstantno hidravlično višino pri relativni gostoti (Dr) okoli 35% in konstantno temperaturo prostora (20°C). Eksperimentalni rezultati so pokazali, da imajo peski z različnimi oblikami zrn (R, S) in enakih velikosti zrn ter granulometrije (cc , cu , D10 , D30 , D50 , D60) različne vrednosti koeficientov hidravlične prepustnosti k. Fotografije posnete z vrstičnim elektronskim mikroskopom (Scanning Electron Microscope - SEM) kažejo fizikalne razlike / podobnosti med peski, ki so bili uporabljeni v tej preiskavi. Predstavljena je tudi primerjalna študija rezultatov preskusov in ocenjenih vrednosti hidravličnih prepustnosti z uporabo empiričnih enačb nekaterih raziskovalcev razvitih za oceno hidravlične prepustnosti tal.
Secondary keywords: geotehnika;pesek;hidravlična prepustnost;prepustnost tal;
URN: URN:SI:UM:
Type (COBISS): Scientific work
Pages: str. 82-93
Volume: ǂVol. ǂ13
Issue: ǂ[no.] ǂ2
Chronology: 2016
ID: 10941819