scholarly journals Enhancement of Shear Strength Parameters of Clayey Soil by using Polypropylene Fiber

2019 ◽  
Vol 9 (2) ◽  
pp. 3536-3540
Keyword(s):  
Shear Strength ◽  
Soil Properties ◽  
Clayey Soil ◽  
Polypropylene Fiber ◽  
Fiber Reinforcement ◽  
Waste Materials ◽  
Shear Strength Parameters ◽  
Strength Parameters ◽  
Unconfined Compression Test ◽  
Foundation Soil

When the foundation soil is not strong enough to hold on with the loads transmitted to it .At such places the structure could be damaged, in order to eliminate this threat the soil properties such as stability, shear strength, durability etc are enhanced by mixing it with different admixtures such as lime, cement etc .At some occasions fibers (obtained from waste materials)are used to enhance the soil properties. In past a large number of studies have shown the effectiveness of such mixing materials at considerable percentages. It has been studied that the outcome of such materials when used in soil improvement techniques is handsome. In this examination the polypropylene fiber ,obtained from waste materials has been used. The different percentages of fiber reinforcement are used and the corresponding changes in the shear strength parameters are examined. The effects of polypropylene fiber reinforcement on the soil samples are examined by carrying out Direct Shear Test and Unconfined Compression Test

scholarly journals Effect of gypsum content on unsaturated engineering properties of clayey soil

2020 ◽  
Vol 9 (1) ◽  
pp. 84
Author(s):  
Mohammed N J Alzaidy
Keyword(s):  
Shear Strength ◽  
Clayey Soil ◽  
Engineering Properties ◽  
Water Retention Curve ◽  
Shear Strength Parameters ◽  
Swelling Potential ◽  
Soil Water Retention Curve ◽  
Strength Parameters ◽  
Gypsum Content ◽  
Vapour Diffusion

Many of gypsum soils have existed in arid and semi-arid lands. It is considered one of the most problematic soils because of its complicated and unpredicted behavior when exposure to moisture. Extensive researches have been conducted in Iraq to observe the behavior of such soil and to suggest safety restrictions for the collapse and set practical precautions for the structures. This study investigated the effect of gypsum content on some unsaturated engineering properties of a clayey soil. Three different proportions of gypsum (0%, 5% and 20% by weight of the parent soil) were added and tested. The samples have been subjected to swelling potential test, soil water retention curve (SWRC), vapour diffusion and shear strength parameters. It is observed that gypsum content has a significant influence on SWRC, whereas, soil that has high gypsum content made SWRC with higher variables represented by air entry values and residual state. On the other hand, an increase in gypsum content led to a reduction of swelling potential and shear strength parameters. The results of vapour diffusion indicate that gypsum content could modify the microstructure in an unsaturated state and reduce the vapour diffusion through the soil.  

Uncertainties of Shear Strength Parameters of Soil Reinforced by Plastic Waste

2015 ◽  
Vol 744-746 ◽  
pp. 695-701
Author(s):  
Giang Nguyen ◽  
Eva Hrubesova ◽  
Jan Maršálek ◽  
Tomáš Petřík ◽  
Marek Mohyla
Keyword(s):  
Shear Strength ◽  
Polyethylene Terephthalate ◽  
Laboratory Tests ◽  
Ground Improvement ◽  
Overwhelming Majority ◽  
Waste Materials ◽  
Shear Strength Parameters ◽  
Strength Parameters ◽  
Soil Shear Strength

In geotechnical practice we often meet the case when soils need to be improved. Various methods for the ground improvement are used in the geotechnical practise. One from methods of soils improvements can use also fiber-shaped waste materials. Such as polyethylene terephthalate (PET) plastic bottles are profusely and widely produced, yet used little for engineering purpose, and the overwhelming majority of them are placed in storage or disposal sites.One form expected improvements is increase of soil shear strength parameters which can be obtained by various methods, including laboratory tests. Determination of soil shear strength parameters by DST is still extensively used. In this paper we will deal with soil shear strength parameters of soil without and with plastic chips and their uncertainty. Uncertainties of shear strength parameters of soil without or with plastic chips are not negligible.

Study of the Effect of Waste Materials on Soil Properties

2018 ◽  
Vol 382 ◽  
pp. 267-272
Author(s):  
Cheekhooree Kooleshwarsingh ◽  
Mohamad Shakri Shariff bin Mohmad Shariff
Keyword(s):  
Shear Strength ◽  
Soil Properties ◽  
Lake Water ◽  
Clayey Soil ◽  
Tap Water ◽  
Waste Materials ◽  
Soil Specimen ◽  
Control Soil ◽  
Palm Oil Fuel Ash ◽  
Physical Test

This research was carried out in order to study the effects that waste materials have on soil properties. As clayey soil has weak physical and mechanical properties, stabilizers are added in the soil to increase its strength .The waste materials were Palm Oil Fuel Ash (POFA) and lake water (waste water). The soil index properties was determined by carrying out the physical test and compaction test. A total of 50 samples were prepared which were tested for unconsolidated undrained Triaxial test and pH test to determine its relative mechanical and chemical properties. A shear strength of 17.80 kN/m2was obtained for the control soil specimen of the mix of 0% of POFA on 7 curing days and the same soil specimen with similar percentage of POFA had a shear strength of 18 kN/m2on 14 days. Moreover, the soil specimen of 80% of POFA and 30 % of tap water had a shear strength 44 kN/m2at 14 curing days. On the other hand, the soil specimen at 80% of POFA and 30% of Lake Water displayed a shear strength of 37 kN/m2on 14 days of curing was noted. The lake water was acidic at a pH of 6 while the tap water was at a neutral pH of 7. The control specimen (0% of POFA) of the mix of soil with tap water displayed a pH of 7 for all the curing days carried out while control soil specimen mixed with lake water displayed a ph of 6. The pH obtained increased in an alkaline way with increasing POFA percentages shear strength increased at a maximum pH of 11 at a soil specimen of 80% of POFA and 30% of Tap water proving POFA to be an alkaline material. It has been concluded that POFA, being a pozzolanic waste material can help in improving the mechanical property of the soil.

Estimation of unsaturated shear strength parameters using easily-available soil properties

2018 ◽  
Vol 184 ◽  
pp. 118-127 ◽  
Author(s):  
Elham Amiri Khaboushan ◽  
Hojat Emami ◽  
Mohammad Reza Mosaddeghi ◽  
Ali Rrza Astaraei
Keyword(s):  
Shear Strength ◽  
Soil Properties ◽  
Shear Strength Parameters ◽  
Strength Parameters
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