Huriye Bilsel

Huriye Bilsel
Cyprus International University · Department of Civil Engineering

PhD

About

50
Publications
15,696
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351
Citations
Citations since 2016
21 Research Items
318 Citations
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
Additional affiliations
September 2015 - July 2019
Cyprus International University
Position
  • Professor

Publications

Publications (50)
Presentation
Full-text available
Cyprus has a long historical record of damaging earthquakes (Ambraseys, 1992; Ambraseys & Adams, 1993). Recently, several earthquakes struck the region, and the need for sustainable and effective technologies has become one of the priorities for geotechnical engineering researchers. Enzyme-induced carbonate precipitation (EICP) is a recently propos...
Article
Benghazi city is the second largest city in Libya. Rapid and large infrastructural development and related economic activities in the last 20 years have mandated the use of Sabkha soils within the city limits for construction activities. There is a growing need to explore the geotechnical aspects of Sabkha soils including the lique-faction hazard....
Article
The main objective of this study was to evaluate the use of enzymatic induced carbonate precipitation (EICP) treatment for erodibility improvement, scour mitigation, and water infiltration capacity of beach sand at one, two, and three cycles of treatment. EICP is a biochemical process that produces calcium carbonate precipitation within a soil matr...
Article
Full-text available
This study aims to assess the suitability of micro-silica (MS) as an industrial waste to modify the hydro-mechanical behavior of expansive soil in comparison with the use of lime as a traditional stabilizer. Due to limitations associated with soil treatment with calcium-based materials, the effect of lime–micro-silica (LMS) on stabilization of expa...
Conference Paper
Full-text available
This study focusses on the assessment of sand stabilized expansive soil as possible landfill liner materials to be utilized in a semi-arid area. Zeolite was also used as an alternative material to sand, mixing it with the expansive soil forming a stable structure with improved properties. Durability analysis of expansive soil-sand (NS) and expansiv...
Article
Full-text available
Beach sands are composed of a variety of minerals including quartz and different carbonate minerals. Seawater in beach sand contains several ions such as sodium, magnesium, calcium, chloride, sulfate, and potassium. These variations in mineralogy and the presence of salts in beach sand may affect the treatment via enzyme-induced carbonate precipita...
Article
Full-text available
The expansive soils in semi-arid and arid regions are affected by swelling-shrinking due to climatic effects, causing damage to lightweight structures. Various methods and materials have been employed to improve the engineering properties of these soils. This paper includes the findings of experimental work conducted studying the effectiveness of u...
Article
Full-text available
The bio-mineralization of calcium carbonates is an innovative and eco-friendly technique for improving soil, which has recently become increasingly popular in the field of geotechnical engineering. Different bio-cementation methods are employed for improving granular soils, including microbially-induced CaCO3 precipitation (MICP) and enzymatic-indu...
Article
Full-text available
The aim of this paper is to investigate the influence of fines content on the undrained shear behavior of sand–clay mixtures with fines contents at 0%, 5%, 10%, 12.5%, 15%, 17.5%, 20%, 22.5 and 25%. The shear strength of the mixture has been evaluated in terms of skeleton void ratio and transitional fines content. Materials used are poorly graded s...
Conference Paper
Full-text available
Strengthening beach sand using enzyme induced carbonate precipitation (EICP) was demonstrated. Enzyme induced carbonate precipitation (EICP) is an emerging biologically-based ground improvement technique that precipitates calcium carbonate within the pores of a granular soil via hydrolysis of urea catalyzed by free urease enzyme. In this study, sam...
Conference Paper
Limestone dust is a solid waste resulting from extraction from parent rock and grinding in quarry crushing units. Disposal of such wastes poses environmental problems such as abundant accumulation in landfills as well as health and environmental hazards due to air pollution. These wastes can be effectively utilized to improve the properties of expa...
Conference Paper
This study evaluates the liquefaction potential based on in situ geotechnical data available in technical and academic reports on Benghazi sabkha, which consists of poorly graded fine to medium sand with some silts and traces of gravels in very loose to medium dense state. Liquefaction potential index (LPI) of sabkha soils are computed from the fac...
Article
Full-text available
In this paper, marble waste is evaluated as a secondary material to be utilized as potential stabilizer to improve the volume change and strength characteristics of sand-amended expansive soil, proposed as a possible landfill, pavement or sub-base material in a semi-arid climate. An experimental program was conducted on sand-expansive soil enhanced...
Article
Sand-Na-bentonite mixture is widely used as engineering barrier material which usually possesses hydraulic conductivity below the regulatory limit (10-7 cm/s). However, in some areas natural Na-bentonite is not easily available, instead an abundantly prevailing local expansive soil can be an alternative. This study assesses the suitability of a loc...
Article
This paper presents the findings of an experimental study on improvement of strength properties of sand stabilized expansive soil, reinforced with polymeric fiber (PF) which consists of pipe scrap waste obtained as a by-product of construction industry. Sand is mixed in 1:1 ratio with expansive soil forming a stable structure with improved stabilit...
Conference Paper
Full-text available
Measurement of tensile strength of soil by direct methods can be challenging due to difficulties in sample preparation and in fixing the specimen while applying uniaxial tension forces. However the tensile strength of soil samples can be measured by indirect tests, such as the Brazilian and double punch tests, assuming that tensile stress is distri...
Article
Full-text available
Multiple series of cyclic triaxial tests were performed on undisturbed and reconstituted samples of sandy soils obtained from areas of known liquefaction at the time of the 2011 East Japan Earthquake. In this test scheme, the shear wave velocity was firstly measured and then cyclic loads were applied to determine the cyclic shear strength. The undi...
Conference Paper
Full-text available
Expansive soils in semi-arid climates must be mitigated to minimize potential structural damage to the overlying structures due to swell-shrink behavior caused by climatic changes. The expansive soil in this study was amended by sand which reduced the swell-shrink potential significantly. As a secondary additive, a waste by product of construction...
Article
Full-text available
Since shear wave velocity is determined by non-destructive experiments in the narrow range of small strain, some researchers have reservations about employing it in the assessment of medium-to-large phenomenon, i.e. liquefaction. However, some others confirm that the shear wave velocity is more likely to suit for distinguishing the liquefaction and...
Conference Paper
Full-text available
Engineered barriers used in waste containment systems in semi-arid areas are usually composite compacted materials, such as sand-bentonite. The containment elements such as the landfill liners should be designed to prevent leachate and ground water permeation through them. A bentonite content of 15% has been used in this study to form a composite m...
Conference Paper
Full-text available
Some researchers have reservations about employing small-strain shear-wave velocity in the assessment of medium-to-large strain liquefaction. However, some others confirm that the shear wave velocity is more likely to suit for distinguishing the liquefaction and non-liquefaction susceptibility of sand deposits by the V S-based liquefaction chart, s...
Article
There are some key challenges for geotechnical applications of the microbially-induced CaCO3 precipitation technique. These challenges mainly arise from lack of enough control on precipitation pattern within soil. Monitoring precipitation progress in treatment solution (biogrout) prior to injection provides useful information on controlling the pre...
Article
Full-text available
Calcium carbonate is a widely used raw material by many industries. It can be precipitated through microbial process within soil pores as cementitious bonding agent between grains for geotechnical applications. It is called microbially induced calcium carbonate precipitation (MICP). Designing an appropriate biogrout material for injection into soil...
Article
Full-text available
This paper studies the strength properties of compacted sand-bentonite landfill barrier material with and without cement addition at different periods of aging. Test results indicated that strength values both in compression and tension increased up to threefold in cement added samples, as well as enhancing the ductile behavior. Cubic modulus, desc...
Article
Full-text available
This paper presents a series of laboratory tests and evaluates the effect of polypropylene fiber inclusion on volume change behavior and soil-water characteristics of expansive soils. Specimens were statically compacted at maximum Proctor dry density and optimum moisture content with 0%, 0.5% and 1% polypropylene fiber inclusions by dry weight of t...
Article
Full-text available
Posidonia oceanica (PO) is the most plentiful seaweed of the Mediterranean Sea, which grows all along the coastal areas, forming widespread meadows. The leaf rejuvenation process of Posidonia oceanica typically occurs in fall when an increase in wave action causes the dead seaweeds to be transported and usually piled up along the coastal areas. Thi...
Article
Full-text available
This paper presents an experimental study evaluating the effect of polypropylene fiber on swell and compressibility of expansive soils. The initial phase of the experimental program includes the study of the effect of polypropylene fiber on maximum dry density (MDD) and optimum moisture content (OMC) with different fiber inclusions. Static and dyna...
Article
Full-text available
This paper presents an experimental study evaluating the effect of polypropylene fiber on mechanical behaviour of expansive soils. The initial phase of the experimental program includes the study of the effect of polypropylene fiber on maximum dry density and optimum moisture content with different fiber inclusions. Dynamic compaction tests have be...
Conference Paper
Full-text available
This article presents the preliminary findings of an experimental study conducted on uniform sand-bentonite mixtures, focussing on the investigation and prediction of the volume change and hydraulic properties of artificially prepared mixtures of natural bentonite (Na-smectite) and poorly graded fine sand. Compacted specimens of sand-bentonite mixt...
Article
Laboratory soil-water characteristic curves (SWCCs) were obtained for compacted marine soils of different lithologies and genesis taken from three different locations in North Cyprus. van Genuchten's model was used to determine the best fit for the laboratory data of the SWCC, and indirect predictions of hydraulic conductivity and diffusivity funct...
Article
Full-text available
Interest in the unsaturated soils of semi-arid to and climates has increased, especially in recent years, due to the adverse effect of industrial and municipal activities on the subsurface environment. The most important soil parameter affecting the rate at which water and dissolved chemicals move through the vadose zone is the soil water character...
Conference Paper
Full-text available
The case study examined is a controversial one, which brought up the discussion of the necessity of subsurface explorations, better site inspection and improved quality of construction technology. The Teachers Training Academy was examined in all aspects, and in contrary to the speculations of poor concrete quality and inadequate reinforcement, num...

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Projects

Projects (2)
Project
The main objective of this project is to evaluate the applicability of strengthening the beach sand using enzymatically induced calcium carbonate precipitation (EICP).
Archived project
Abstract: Sabkha is originally an Arabic expression that is used widely to describe a salt flat underlain by sand to silt-clay soil mixtures. Sabkha soils found locally and in many places around the world, especially in the warm and dry areas with arid climates. Sabkha in Libya distributed along the coasts, as well as it cover a number of continental depressions Benghazi city is the second largest city in Libya. Rapid expansion of the economic situation in Libya in the past 15 years has led to serious consideration of the sabkha lands as potential construction sites. As a consequence there is a growing need to study sabkha areas. The geological studies of Benghazi basin have shown that the sabkha soils extend from the surface down to approximately 6 meters. The sabkha soils are classified as problematic deposits, several buildings constructed on them revealing tilting and cracks. This thesis will discuss the geological, geotechnical and chemical characteristics, as well as liquefaction potential of Benghazi sabkha soils. Seismic soil liquefaction is evaluated for sabkha in terms of the factor of safety against liquefaction (FS) along the depths of soil profile using standard penetration test (SPT)-based simplified empirical procedure for sandy layers and index-based procedures for fine-grained layers, considering different earthquake scenarios Mw=5.3, 6, 7.1. The liquefaction analysis results have shown that the top 6 meters of sabkha soil profile have a high susceptibility to liquefaction with earthquake magnitudes of 6 and 7.1. And Fine-grained soils are classified as non-liquefiable soils. Correlation between N-SPT value and soil properties such as relative density, friction angle, modulus of elasticity and undrained shear strength indicated that sabkha soils are problematic soils, where these soils subjected to problems related to bearing capacity and settlement.