Effects of Fines Content and Plasticity on Index Properties and Hydraulic Conductivity of Coarse-Fine Mixtures

Date

2022-02-01

Author

Ekici, Anıl
Huvaj Sarıhan, Nejan
Akgüner, Cem

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

171
views

0
downloads

Ten coarse-fine mixtures (CFM) (intermediate soils) having fines contents (FC) of 0%, 12%, 20%, 30%, 40%, and plasticity indices (PI) of 5% and 15% were prepared in the laboratory by mixing different fractions of gravel, sand, nonplastic silt, kaolin, and bentonite. Index properties, volume change during saturation, specific surface area (SSA), and saturated hydraulic conductivity of CFM were investigated. For compacted CFM, aFC=15%" role="presentation" style="box-sizing: border-box; display: inline; font-style: normal; font-weight: normal; line-height: normal; font-size: 18px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">FC=15%FC=15%(forPI=5%" role="presentation" style="box-sizing: border-box; display: inline; font-style: normal; font-weight: normal; line-height: normal; font-size: 18px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">PI=5%PI=5%) andFC=12%" role="presentation" style="box-sizing: border-box; display: inline; font-style: normal; font-weight: normal; line-height: normal; font-size: 18px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">FC=12%FC=12%(forPI=15%" role="presentation" style="box-sizing: border-box; display: inline; font-style: normal; font-weight: normal; line-height: normal; font-size: 18px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">PI=15%PI=15%) represent the transition between coarse- and fine-dominant behavior based on intergranular void ratio. The total SSA of CFM may be estimated from the weighted average of SSA determined individually for each soil fraction since the SSA of the cohesive portion was observed to be linearly proportional to the percent fractions of kaolin and bentonite. Hydraulic conductivity estimations based on the SSA of soils proposed by the Kozeny–Carman equation underpredicted the hydraulic conductivity of CFM by one to four orders of magnitude. Alternatively, the formulations from consolidation theory and modified Hazen’s correlation utilizing effective particle size,D10" role="presentation" style="box-sizing: border-box; display: inline; font-style: normal; font-weight: normal; line-height: normal; font-size: 18px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">D10D10, and void ratio,e, estimated the hydraulic conductivity within an order of magnitude. Although hydraulic conductivity decreased with the increase of FC and PI, a smaller amount of decrease was observed in low plastic CFM.

URI

https://ascelibrary.org/doi/pdf/10.1061/%28ASCE%29MT.1943-5533.0004149
https://hdl.handle.net/11511/96198

Journal

Journal Of Materials In Civil Engineering-Asce

DOI

https://doi.org/10.1061/(asce)mt.1943-5533.0004149

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

Geotechnical properties of coarse-fine mixtures and their interaction with geogrids through large direct shear testing Ekici, Anıl; Huvaj Sarıhan, Nejan; Akgüner, Cem; Department of Civil Engineering (2022-6) Different proportions of gravel, sand, nonplastic silt, kaolin, and bentonite were mixed to obtain ten coarse-fine mixtures (CFM) having 0%, 12%, 20%, 30%, 40% fines content (FC) and 5% and 15% plasticity indices (PI). Mixtures were evaluated to identify behavioral thresholds and address backfill restrictions in commonly used guidelines to design reinforced earth walls. All CFM specimens were initially compacted to 95% of standard Proctor dry density at optimum moisture content. Index, hydraulic properties,...
Effects of Bentonite Combinations and Gelatin on the Rheological Behaviour of Bentonite – Apple Juice Dispersions Dik, Tunay; Özilgen, Mustafa (Elsevier BV, 1996-11) Rheological behaviour of bentonite – apple juice suspensions were experimentally determined at 25°C, within the shear rate range of 4.3 to 43.1 s−1with 0.90, 1.33 and 2.66 g/L bentonite mixtures and 0 to 0.25 g/L (on dry basis) gelatin concentrations. The mixtures consisted of 100%, 80%, 60%, 40% 20% and 0% Ca-bentonite and balance Na-bentonite combinations. The experimental data were described with the power law as τ =Kγ.1.56. The consistency index was related to the calcium, sodium and gelatin concentrati...
Effect of different binders on the combustion properties of lignite - Part II. Effect on kinetics Altun, Naci Emre; Kök, Mustafa Verşan (2001-10-16) In this research kinetic analysis of the Tuncbilek lignite and its mixture with different binders (molasses, CMC, sulphide liquor, heavy crude oil, sodium silicate, cornstarch, lime, peridur, bentonite, cement and poly(vinyl-acetate)) were analysed by thermogravimetric (TG/DTG) methods. Two different kinetic models (Arrhenius and Coats-Redfern) were used to determine the activation energies of the samples studied. The concept of weighed mean activation energy was applied to determine the overall reactivity ...
Effect of pH in an aqueous medium on the surface area, pore size distribution, density, and porosity of montmorillonite Altin, O; Özbelge, Hilmi Önder; Dogu, T (Elsevier BV, 1999-09-01) Surface area, pore volume distribution, and porosity of montmorillonite are determined after being exposed to aqueous solutions with various pH values. For measurement, after each pH treatment the clay samples were freeze-dried in order to keep the structure of the clay same as that in the aqueous solution. Surface area and pore size distribution measurements were performed on an unmodified and four pH (2.5, 4.0, 5.5, 9.0)-adjusted clay samples using N-2 and CO2 as adsorbates. The surface area measurements ...
Effect of grain size and porosity on phonon scattering enhancement of Ca3Co4O9 Gunes, Murat; Özenbaş, Ahmet Macit (2015-03-25) Ca3Co4O9 (C-349) samples with average grain sizes ranging from 18 nm to 2 mu m were synthesized using the citrate sol-gel method. PEG 400 was used to vary the particle size and porosity, and the thermoelectric (TE) properties were examined from 300 to 1000 K. Nanostructuring and porosity do not appear to significantly affect the Seebeck coefficient; however, a considerable increase in the resistivity over the entire temperature range was observed, leading to lower power factors for the nano-sized samples. T...

Citation Formats

A. Ekici, N. Huvaj Sarıhan, and C. Akgüner, “Effects of Fines Content and Plasticity on Index Properties and Hydraulic Conductivity of Coarse-Fine Mixtures,” Journal Of Materials In Civil Engineering-Asce, vol. 34, no. 5, pp. 1–15, 2022, Accessed: 00, 2022. [Online]. Available: https://ascelibrary.org/doi/pdf/10.1061/%28ASCE%29MT.1943-5533.0004149.