scholarly journals Evaluation of Compression Behaviors of Marine Clay Reinforced with Waste Shredded Tires

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Weijuan Geng ◽  
Hao Liu ◽  
Jie Yin ◽  
Yongwei Du ◽  
Daniel Kumah
Keyword(s):  
Regression Line ◽  
Soft Clay ◽  
Reinforced Soil ◽  
Content Increase ◽  
Compression Index ◽  
Compression Tests ◽  
Marine Clay ◽  
Compression Behavior ◽  
Clay Particles ◽  
The Difference

This study evaluates the compression behaviors of a soft marine clay reinforced with waste shredded tire (WST) at different sizes (<0.5 mm, 0.5–2.0 mm, and 2.0–4.0 mm) and contents (15%, 35%, and 50%). Results from compression tests indicate that the compression index (Cc) of WST-reinforced soft clay decreases with increasing WST shred size and content. The swelling index (Cs) increases as the WST shred size and content increase. The difference in compression curves becomes more significant for composite reinforced at large shred size. The void indexes of WST-reinforced Lianyungang clay can be well normalized regardless of WST shred size and content by a regression line. The WST dominates the compression behavior of the WST-clay composite, as the WST would be compressed prior to the clay particles. The results in this study provide an optimum WST content at 50% with shred size of 2.0–4.0 mm for reinforcing the Lianyungang marine clay for achieving higher compressibility, contributing to the input database of machine learning for WST-reinforced soil.

La compression triaxiale des sols armés

1980 ◽  
Vol 17 (2) ◽  
pp. 153-164 ◽  
Author(s):  
Robert P. Chapuis
Keyword(s):  
Limit Equilibrium ◽  
Triaxial Compression ◽  
Reinforced Soil ◽  
Soil Reinforcement ◽  
Triaxial Tests ◽  
Compression Tests ◽  
Reinforced Earth ◽  
The Difference ◽  
The One ◽  
Compression Triaxiale

For a better understanding of the mechanical behaviour of reinforced soils, the paper presents a study of triaxial compression tests on soils reinforced by identical, equally spaced, plane ties. Soil–reinforcement interactions are considered by using a method similar to the one that resulted in the introduction of the cohesion effect concept in reinforced earth retaining walls. The material's limit-equilibrium equation is established for any tie orientation. These ties give to a reinforced soil a strength higher than the unreinforced soil strength. The difference may be considered as a cohesion term, which usually depends on the strength, concentration, and inclination of the ties, as well as on the radial stress level. The cohesion term given by triaxial tests is different from the cohesion effect term already introduced in reinforced earth walls, as there is no cohesion effect in a triaxial test. The paper also presents a study of adhesion conditions. By examining stress distribution in the soil between the ties, it is established that beyond a given inclination, no traction can be developed in the ties.

Dynamic Response of Reinforced Soil Retaining Wall Resting on Soft Clay

2021 ◽  
Author(s):  
Ripon Hore ◽  
Sudipta Chakraborty ◽  
Ayaz Mahmud Shuvon ◽  
Md. Fayjul Bari ◽  
Mehedi A. Ansary
Keyword(s):  
Dynamic Response ◽  
Retaining Wall ◽  
Soft Clay ◽  
Reinforced Soil

Dynamic Responses of Reinforced Soil Model Wall on Soft Clay Foundation

2021 ◽  
Author(s):  
Sudipta Chakraborty ◽  
Ripon Hore ◽  
Ayaz Mahmud Shuvon ◽  
M. S. Mazhar ◽  
Mehedi A. Ansary
Keyword(s):  
Soft Clay ◽  
Reinforced Soil ◽  
Dynamic Responses ◽  
Soil Model

Uplift and Settlement Prediction Model of Marine Clay Soil e Integrated with Polyurethane Foam

2019 ◽  
Vol 9 (1) ◽  
pp. 481-489
Author(s):  
D.C. Lat ◽  
I.B.M. Jais ◽  
N. Ali ◽  
B. Baharom ◽  
N.Z. Mohd Yunus ◽  
...  
Keyword(s):  
Polyurethane Foam ◽  
Clay Soil ◽  
Ground Improvement ◽  
Soft Soil ◽  
Soft Clay ◽  
Effective Thickness ◽  
Marine Clay ◽  
Uplift Pressure ◽  
Pu Foam ◽  
Improvement Method

AbstractPolyurethane (PU) foam is a lightweight material that can be used efficiently as a ground improvement method in solving excessive and differential settlement of soil foundation mainly for infrastructures such as road, highway and parking spaces. The ground improvement method is done by excavation and removal of soft soil at shallow depth and replacement with lightweight PU foam slab. This study is done to simulate the model of marine clay soil integrated with polyurethane foam using finite element method (FEM) PLAXIS 2D for prediction of settlement behavior and uplift effect due to polyurethane foam mitigation method. Model of soft clay foundation stabilized with PU foam slab with variation in thickness and overburden loads were analyzed. Results from FEM exhibited the same trend as the results of the analytical method whereby PU foam has successfully reduced the amount of settlement significantly. With the increase in PU foam thickness, the settlement is reduced, nonetheless the uplift pressure starts to increase beyond the line of effective thickness. PU foam design chart has been produced for practical application in order to adopt the effective thickness of PU foam within tolerable settlement value and uplift pressure with respect to different overburden loads for ground improvement works.

A Newly Developed Clamping Device for the Tension/Compression Test at Various Strain Rates

2014 ◽  
Vol 626 ◽  
pp. 353-358
Author(s):  
Geun Su Joo ◽  
Min Kuk Choi ◽  
Hoon Huh
Keyword(s):  
Strain Rate ◽  
Sheet Metal ◽  
Metal Forming ◽  
Loading Condition ◽  
Strain Rates ◽  
Compression Tests ◽  
Compression Behavior ◽  
Compression Loading ◽  
Hardening Behavior ◽  
Clamping Device

The tension/compression hardening behavior is important in sheet metal forming processes because of complicated loading paths. Experimental methods to measure the tension/ compression behavior have not considered the effect of the strain rate although the strain rate is related to the hardening behavior of sheet metal. The tension/compression tests need to be conducted considering the strain rate to acquire accurate hardening behavior.This paper deals with an experimental technique to measure the tension/compression behavior of sheet metal at various strain rates. A new clamping device was developed to prevent a sheet specimen from buckling under compression loading condition. Compared to previous clamping devices, the clamping device was devised to uniformly impose a clamping force and easily measure the strain from side of a specimen. Tension/compression tests have been conducted at various strain rates for SPCC and DP590 with displacement of 10%. Hardening curves under the tension or compression loading condition were obtained and analyzed with respect to the strain rate.

Recrystallization and Grain Growth during Alloy 718 Processing

2007 ◽  
Vol 539-543 ◽  
pp. 3094-3099
Author(s):  
Nho Kwang Park ◽  
Jeoung Han Kim ◽  
Jong Taek Yeom
Keyword(s):  
Grain Size ◽  
Grain Growth ◽  
Heat Treatments ◽  
Grain Structure ◽  
Alloy 718 ◽  
Compression Tests ◽  
Δ Phase ◽  
Grain Boundary Characteristics ◽  
The Difference ◽  
Boundary Characteristics

In Alloy 718 ingot cogging process, dynamic and metadynamic recrystallizations, and static grain growth occur, and also the presence of δ phase plays a key role in controlling the grain size. In this study, the evolution of grain structure in VIM/VAR-processed Alloy 718 ingots during post-cogging heat treatments is dealt with. Compression tests were made on VIM/VAR-processed Alloy 718 ingot at temperatures between 900oC ~ 1150oC. Heat treatments were made on the compression-tested specimens, and the variation of grain size was evaluated. Constitutive equations for the grain growth are established to represent the evolution of microstructures. Special attention is paid to the evolution of grain structure under the condition of dynamic and metadynamic recrystallizations, and grain growth. The grain growth rate depends mainly on the presence of δ-phase below the δ-solvus temperature, and on the difference in the grain boundary characteristics above it.

Secondary compression behavior of over-consolidated soft clay after surcharge preloading

2021 ◽  
Author(s):  
Jun Wang ◽  
Heng Zhuang ◽  
Lin Guo ◽  
Yuanqiang Cai ◽  
Mingfeng Li ◽  
...  
Keyword(s):  
Soft Clay ◽  
Compression Behavior ◽  
Secondary Compression ◽  
Surcharge Preloading

Effect of Lime on Compaction, Strength and Consolidation Characteristics of Pontian Marine Clay

2015 ◽  
Vol 72 (3) ◽  
Author(s):  
Siaw Yah Chong ◽  
Khairul Anuar Kassim
Keyword(s):  
Construction Material ◽  
Soft Clay ◽  
Engineering Properties ◽  
Dry Density ◽  
Marine Clay ◽  
Maximum Dry Density ◽  
Stabilization Phase ◽  
Compaction Curve ◽  
Stabilized Soil

Marine clay is a problematic construction material, which is often encountered in Malaysian coastal area. Previous researchers showed that lime stabilization effectively enhanced the engineering properties of clay. For soft clay, both strength and consolidation characteristics are equally important to be fully understood for design purpose. This paper presented the effect of lime on compaction, strength and consolidation characteristics of Pontian marine clay. Compaction, unconfined compression, direct shear, Oedometer and falling head permeability tests were conducted on unstabilized and lime stabilized samples at various ages. Specimens were prepared by compaction method based on 95 percent maximum dry density at the wetter side of compaction curve. It was found that lime successfully increased the strength, stiffness and workability of Pontian marine clay; however, the permeability was reduced. Unconfined compressive strength of stabilized soil was increased by 49 percent at age of 56 days whereas compressibility and permeability was reduced by 48 and 67 percent, respectively. From laboratory tests, phenomenon of inconsistency in engineering characteristics was observed for lime stabilized samples below age of 28 days. This strongly proved that lime stabilized soil underwent modification phase before stabilization phase which provided the long term improvement.

scholarly journals Pengaruh Pasang Surut terhadap Pengendapan Lumpur di Lahan Sawah Rawa Kawasan Sungai Barito Kalimantan Selatan

2019 ◽  
Vol 38 (3) ◽  
pp. 273
Author(s):  
M Mawardi ◽  
Putu Sudira ◽  
Bambang Hendro Sunarminto ◽  
Totok Gunawan ◽  
Benito Hadi Purwanto
Keyword(s):  
Paddy Field ◽  
The Other ◽  
Climate Condition ◽  
Tidal Amplitude ◽  
Land Area ◽  
Marine Clay ◽  
Clay Deposit ◽  
Soil Nutrition ◽  
The Difference ◽  
Field Area

Swamp land has a great potential to be developed as a paddy field area. However it has many constraints such as-phyrite (FeS2) at the depth of 30–60 cm and lack of soil nutrition. On the other hand, supply of marine clay from the sea which contains a lot of smektit clay mineral can be used to netralize this condition. Mud clay is very important for the development of rice root because it contains much nutrition and to enlarge the top of soil reducing the oxidation of phyrite. This study was conducted from January 2016 to June 2017 in swamp land area of Barito River of South Kalimantan. Data was collected by measuring the difference between maximum and minimum sea tide (tidal amplitude) and the deposition of mud clay. The results indicated that the distribution of mud clay deposit vary depends on the geography and the tidal amplitude of the zone. Zone VII has higher concenration of mud clay than the other one. The distribution pattern of mud clay deposit follows the parabola type, verticaly and horizontaly type, as well. Increasing of mud clay at all of the zone areas are not significantly effected by the daily tidal amplitude, only depends on climate condition/the season change.

Hibernation, temperature and rates of oxidative phosphorylation by heart mitochondria

1960 ◽  
Vol 198 (2) ◽  
pp. 463-466 ◽  
Author(s):  
Frank E. South
Keyword(s):  
Oxygen Consumption ◽  
Oxidative Phosphorylation ◽  
Incubation Temperature ◽  
Regression Line ◽  
Vertical Displacement ◽  
Heart Mitochondria ◽  
Oxidative Enzymes ◽  
Effect Of Temperature ◽  
The Difference

The effect of temperature on rates of oxidative phosphorylation (pyruvate substrate) by heart mitochondria obtained from hibernating hamsters, control hamsters and rats was studied. Apparent energies of activation ( Ea) determined between 5° and 24°C were, respectively, 20.4, 20.8 and 28.3 Kcal. for the rates of oxygen consumption and 20.6, 21.4 and 29.5 Kcal. for the rates of phosphorylation. The difference between the rats and either group of hamsters were significant statistically. The slope of the regression line fitted to the data obtained from hibernating animals did not differ significantly from that of the control hamsters. However, a parallel vertical displacement of the lines indicated a probable increase in these oxidative enzymes upon preparation for, or during, hibernation. No significant alterations in the efficiency of oxidative phosphorylation with variations in the incubation temperature were noted in any of the preparations.

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