2 edition of Effect of addition of clay powder on the shear strength. found in the catalog.
Effect of addition of clay powder on the shear strength.
H. H. Ayyad
Thesis (B.Sc. Civil Engineering) - North East London Polytechnic, 1983.
|Contributions||North East London Polytechnic.|
|The Physical Object|
|Pagination||46  leaves :|
|Number of Pages||46|
This paper deals with the results of an experimental study carried out on compacted clay (PL=23%) to investigate the influence of compaction water content on the shear strength of the clay. For the measurement of shear strength parameters, direct shear tests were done on samples compacted at optimum moisture content (i.e. w=24%), at the dry side of optimum (i.e. w=18%, 20% Cited by: This video is unavailable. Watch Queue Queue. Watch Queue Queue.
As an example of the relationship between shearing strength and speed of shear, Taylor  reports in his text book about laboratory compressive strength test results obtained on remolded Boston Blue Clay (Plasticity Index, Ip = 17) samples at different shearing rates. A diagram summarizing these results indicated an apparent shear strength 14%. Therefore, to figure out effect of the GGBFS addition on the volume changes, compressive strength and shear strength of a lime treated clay, a series of experimental studies consist of VSS, UCS and RS tests were designed to investigate the effect of partially replacement of the lime with by:
silica fume in different proportions, has higher binding strength.,low swelling pressure, and high compressive and shear strength. and ni () studied effect of lime and microsilica admixtures on silty sand soils, in presence of s showed that the addition of microsilica to the silty sand soil. addition of waste glass resulted in the increase of Dry Density and CBR values and the reduction of plasticity index, Optimum Moisture Content . A recent research found that the use of soda lime glass powder waste with clay has a significant effect on the strength of the soil .
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His paper presents the results of geotechnical and mineralogical investigations on lime treated clay soils from Hamedan City, Iran, and effects of pH variations on their shear strength : Reza Babazadeh. knowledge has shown that the shear strength gradually increases with increasing percentages of floating particles in unsaturated clays.
INTRODUCTION One of the most important design input parameter needed for geotechnical design is soil's shear strength. The shear strength is commonly defined by the Mohr-Coulomb failure envelope: on C (1)File Size: 2MB. Displacement and stress effects cause changes in soil structure, thus generally reducing the strength of the soil.
The study of shear strength of clayey soils are particularly important because of increasing application of clay barrier systems for waste by: The measured strength is not used for design purposes; rather, the unconfined compressive strength data are principally significant for control purposes .
Undrained triaxial shear strength test: It could be seen that addition of 7% lime raised the value of cohesion C, from to kn m-2 while the angle of internal friction was reduced from to effects on the undrained shear strength of compacted clays.
The initial values of suction and degree of saturation may affect both the initial effective stress in the specimen, and. In this paper, the results of vane shear strength measurements on various conditioned clays and clay-sand mixtures at various shearing velocities and applied pressures are presented and analyzed.
The results clearly show the effects of the chemicals used and also point out the differences in their efficiency depending on the clay mineralogy. Current Advances in Mechanical Design & P r o d u c t i o n, Fourth Cairo U n i v e r s i t y MDP Conference, C a i r o, Dec.EFFECT OF IRON POWDER ADDITION ON MECHANICAL STRENGTH OF SOLDERED JOINTS M.R.
El Hebeary, S.A. E l - D a l i l and : M.R. El Hebeary, S.A. El-Dalil, A.S. Salama. The direct shear test using shear box is commonly recommended by practicing geotechnical engineers to obtain the cohesion and angle of internal friction for granular soils.
The clay liners involve sand as a main constituent with added clay of variable proportions. This research aims at investigating the reliability of using the direct shear test for different clay contents and different Cited by: Estimating Undrained Strength of Clays from Direct Shear Testing at Fast Displacement Rates.
the effects of alum and lime additions on shear strength parameters of clay as secondary effects. Estuarine clay (b2) with vertical rootlets v — None Selset Uniform boulder clay h Undrained shear strength The other very serious effect of sample size is to modify undrained shear strength, as measured in either the field or the laboratory.
The effects of sample size on undrained shear strength have beenFile Size: KB. peak intact strength. The strength on such a shear surface drops rapidly to a well defined post-rupture strength after a few millimeters relative displace- ment.
The behaviors of high-plasticity clays depend largely on the clay mineral content. Recently, it has been observed that sudden slope failures of most clay slopes occur in regions pronounced with repeated rainfall and sunny climate.
The reason for this is still unclear. Examining the effect of clay minerals and drastic weather changes on shear strength will be useful in predicting the Author: Frederick Nai Charkley, Kunyong Zhang, Guoxiong Mei.
Clay has an important role in making green sand casting mould beside water. Clay acts as binders, holding the sand grains together. Water is needed to activate the clay bond.
Without the addition of water on clay, no strength would be achieved on sand mould, as the sand and clay would be just two dry materials.
Bentonite clay was used in this by: 2. The main objective of this study is to investigate the use of waste glass powder in geotechnical applications and to evaluate the effects of waste glass powder on shear strength, compressibility and CBR values of clayey soil by carrying out direct shear tests, unconfined compression tests, standard proctor test and CBR : Joseph Jolly K, Jinu Rose Benny, Juny Mareena Sebastian, Mariya Thomas.
Shear strength is the ability of the soil to resist shearing stresses and sustain loads. The value of soil shear strength is about half of the value of compressive strength. Shear strength of soils is highly aﬀ ected by moisture conditions (i.e. water content), especially if the soil contains clay materials.
Usually the laboratory specimen, which are used to determine shear strength of soil are prepared at water content and dry density Cited by: 7.
CLAY VATEF. CONTENl 7. i SHEAR STRENGTH t/m2!EMdULDEb I,_.__I 5 10 15 20 25 30 35 40 45 c’ PLASTICITY INDEX IP %J SHEAR STRENGTH AND VERTICAL PRESSURE(Log scab e: t Fig.
4 (above). Geotechnical profile through a normally consolidated clay in Drammen 0 Fig. 5 (top right). Correlation of plasticity index and undrained shear strength ratio forFile Size: 4MB. Dry clay materials are often used in conjunction with other materials to make up clay bodies for use in ceramics.
The benefit of creating one’s own clay body with dry materials is that you can achieve the exact composition and qualities you are looking for. The strength properties of two overconsolidated clays (Todi Clay and London Clay) are presented and the intact strengths are shown to be greater than the corresponding intrinsic strengths.
However, both clays show brittle behaviour with the formation of shear surfaces at peak intact by: The effective stress strength parameters that apply to a particular volume of clay will lie between these two bounds and will be determined by the spacing, extent and orientation of the fissures, by the direction of shearing, and by the kinematic constraints—that is, whether potential shear surfaces can seek out the lower-strength by:.
effect of fillers and LPA content on the mechanical behaviour. Within this respect, it was found that an increase in the filler content form 20 to 40% results in a small decrease in the shear strength while the flexural strength seems insensitive.
The addition of LPA from 5 to 20% reduces the shear strength without affecting the flexural strength. In addition to determining the shear strength, this study also focused on volumetric changes of specimens during shearing in a direct shear box.
Tests are conducted on specimens of sand with various fines content ranging from 0 to 25%, while maintaining a Author: N. Umaharathi, K. P. Bhargav Kumar, Balunaini Umashankar.1.
Understand the frictional nature of shear strength of coarse soils 2. Understand the Coulomb failure criterion for soils 3. Understand undrained shear strength.
Chapter 4. Shear strength. Friction, normal and shear stress. Soil shear strength is mainly due to friction between soil grains. The friction effect is.