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Register a new userThe effect of Adding Sand to Clay Soils Which Used as Liners at Landfill Sites on Hydraulic Conductivity
تأثير إضافة الرمل للترب الغضارية المستخدمة كبطانات في مواقع ردم النفايات على معامل النفاذية
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Aِl-Baath University ورقة بحثية
Publication date
2017
fields
Geotechnical Engineering
and research's language is
العربية
Created by
Shamra Editor
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تم في هذا البحث دراسة تأثير إضافة نسب مختلفة من الرمل لعدة أنواع من الترب الغضارية المستخدمة كبطانة تكتيم في مواقع ردم النفايات الصلبة بهدف إيجاد أفضل نسبة خلط ( رمل - غضار).
This study investigated the effect of adding different percentages of sand to several types of clay soils, Which used as liners at solid waste landfill sites in order to find the best mixing ratio (sand - clay).
References used
Alawaji, H.A., 1999. Swell and compressibility characteristics of sand–bentonite mixtures inundated with liquids. Applied clay science, 15(3), pp.411-430
Chamberlain, E.J., and Gow, A.J. 1979. Effect of freezing and thawing on the permeability and structure of soils. Engineering Geology, 13: pp.73–92
Daniel, D.E., and Benson, C.H. (1990). “Water contentdensity criterion for compacted soil liners”, Journal of Geotechnical Engineering, Vol.116, No.12, Dec., pp.1811- 1830
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In this study, the effect of temperature on volume strains in three
types of local clay soils was studied after adding different percentages of
sand for each soil (10%-20%-30%40%-50%) when temperatures change
from (20-60)° C to be used as liners i
n solid waste landfill sites . The
results of the study showed that the mixing of sand with the clay played a
key role in reducing the magnitude of volume strains between (24-27%)
of the value of strains.
The scientific and practical value of this research appears in recognizing the characteristics of the clay soil, which is located in Alnabeck, and used in constructing ALwagar earth fill dam. We will study five samples chosen from the materials site
Hofar ALmlagea and which will be used in constructing ALwagar earth fill dam through which some Geo-geometrical characteristics like (Liquid Limit, Plasticity Limit, plasticity index, Consistency Index, Liquidity Index, Clay activity, collapse degree) will be determined.
Depending on the Results of this study, we used international classifications (Casagrande classification – Unified Soil Classification System) to study the soil of the studied area. We made use of the results of the experimental study to determine the position of soil according to the international classification, and we suggested some solutions to improve the characteristics of the soil which is used in constructing soil dams.
This search include making laboratory tests on sandy soil samples
,wich were taken from Damascus Suburb (Alkastal-Maarona-
Alsallema) and from Hama(Alsalameya), physical and clasificated
tests were made besides oedometer tests, two limited cases w
ere
studied :maximum loose and maximum dense for each soil.
Values of deformation modulus (E) were determined from
oedometric compression curves at various compression levels, and
then the experimental equations between deformation modulus
and primary void ratio, and between modulus of lateral soil
pressure and deformation modulus were concluded at maximum
loose and maximum dense.
This search include making laboratory tests on sandy soil samples
,wich were taken from Damascus Suburb (Alkastal-Maarona-
Alsallema) and from Hama(Alsalameya), physical and clasificated
tests were made besides oedometer tests, two limited cases w
ere
studied :maximum loose and maximum dense for each soil.
Values of deformation modulus (Eoed) were determined from
oedometric compression curves at various compression levels, and
particle shape parameters (sphericity-roundness-elongation) were
founded for each soil then the experimental equations between
last parameters and deformation modulus were concluded.
This research studies the effect of the addition of polypropylene
fibers (PF) on the properties of the swelling clayey soil. The effect
of PF on the shear strength of the clayey soil has been studied
and the results show that adding PF, up to spec
ific value,
increases the shear strength. Beyond this value of addition, the
shear strength decreases. The increase in shear strength was
about (100-110) % and the optimal addition ratio was determined.
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