Mechanical Behavior of Waste Tire Crumbs–Sand Mixtures Determined by Triaxial Tests

2017 ◽  
Vol 35 (4) ◽  
pp. 1793-1802 ◽  
Author(s):  
Reza Noorzad ◽  
Masoud Raveshi
Keyword(s):  
Mechanical Behavior ◽  
Triaxial Tests ◽  
Waste Tire ◽  
Tire Crumbs

scholarly journals New Formulations for Dynamic Behavior of Sand-Waste Tire Mixtures in a Small Range of Strain Amplitudes

2017 ◽  
Vol 62 (1) ◽  
pp. 92-101 ◽  
Author(s):  
Ayse Edincliler ◽  
Ali Firat Cabalar ◽  
Abdulkadir Cevik ◽  
Haluk Isik
Keyword(s):  
Shear Modulus ◽  
Damping Ratio ◽  
Strain Range ◽  
Triaxial Tests ◽  
Small Range ◽  
Ratio Test ◽  
Waste Tire ◽  
Confining Pressures ◽  
Input Variables ◽  
Tire Crumbs

This paper describes the results of a series of cyclic triaxial tests on sand - waste tire mixtures, and applications of genetic programming (GP) and stepwise regression (SR) for the prediction of damping ratio and shear modulus of the mixtures tested. In the tests, shear modulus, and damping ratio of the geomaterials were measured for a strain range of 0.0001% up to 0.04%. The input variables in the developed GP and SR models are the waste tire content (0%, 10%, 20%, and 30%), waste tire type (tire crumbs or tire buffings), strain, and confining pressures (40 kPa, 100 kPa, and 200 kPa), and outputs are shear modulus and damping ratio. Test results show that the shear modulus and the damping ratio of the mixtures are strongly influenced by the waste tire inclusions. The performance of the proposed GP models (R2 = 0.95 for shear modulus, and R2 = 0.94 for damping ratio) are observed to be more accurate than that of the SR models (R2 = 0.87 for shear modulus, and R2 = 0.91 for damping ratio).

Influence of drainage and root biomass on soil mechanical behavior in triaxial tests

2021 ◽  
Author(s):  
Mehtab Alam ◽  
Yuan-Jun Jiang ◽  
Muhammad Umar ◽  
Li-jun Su ◽  
Mahfuzur Rahman ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Root Biomass ◽  
Triaxial Tests

Use of Nanosilica and Cement in Improving the Mechanical Behavior of Disintegrated Carbonaceous Mudstone

2020 ◽  
Vol 20 (8) ◽  
pp. 4807-4814 ◽  
Author(s):  
Ling Zeng ◽  
Xiaofei Yao ◽  
Qian-Feng Gao ◽  
Hanbing Bian ◽  
Dianhua Fan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Mechanical Behavior ◽  
Pozzolanic Reaction ◽  
Deviatoric Stress ◽  
Triaxial Tests ◽  
X Ray Diffraction ◽  
X Ray ◽  
Angle Of Internal Friction ◽  
Scanning Electron

This study aims to examine the mechanical behavior of disintegrated carbonaceous mudstone modified with nanosilica and cement (DCMNC). Many DCMNC specimens with various nanosilica contents were prepared. The X-ray diffraction (XRD) analyses and scanning electron microscopy (SEM) observations were performed on some of the specimens. Afterwards, triaxial tests were carried out on the remaining specimens to determine the mechanical behavior of DCMNC. The results showed that the cohesion exhibited a positive correlation with nanosilica content while the angle of internal friction presented a negative correlation with nanosilica content. The peak deviatoric stress, residual deviatoric stress and brittle modulus of DCMNC showed an increase followed by a decrease as nanosilica content varied from 0 to 8%, and all of them reached corresponding maximums at a nanosilica content of 2%. Thus, 2% was considered to be the optimum nanosilica content. The modification mechanism of DCMNC could be explained by the pozzolanic reaction related to nanosilica and the filling effect of nanosilica.

scholarly journals Experimental Study on Mechanical Behavior of Lean Cemented Sand and Gravel Material in Unloading and Reloading Paths

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Jie Yang ◽  
An-yu Yang ◽  
Yan-gong Shan ◽  
Miao-miao Yang ◽  
Jin-lei Zhao ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Hysteresis Loop ◽  
Triaxial Test ◽  
Volumetric Strain ◽  
Rate Of Change ◽  
Coarse Grained ◽  
Triaxial Tests ◽  
Water Drainage ◽  
Cemented Sand ◽  
Sand And Gravel

Lean cemented sand and gravel (LCSG) materials are subjected to unloading-loading when an LCSG dam is opened for water drainage and then refilled or a roadbed base is subjected to repeated wheel loads. To investigate the behavior of the LCSG materials under loading-unloading, previous studies utilized the complete loading triaxial test. In contrast, in this study, the consolidated drained triaxial tests in the unloading and reloading paths for materials with cementing agent contents of 60 and 100 kg/m3 under different confining pressures, for which each curve generates three loading-unloading cycles, were applied to investigate the unloading and reloading mechanical behavior. Experimental results indicated that the unloading and reloading behavior of the LCSG materials produced stress-strain curves exhibiting a crescent-shaped hysteresis loop, which differs from that exhibited by coarse-grained soil. Although the shape of the crescent-like hysteresis loop was preserved as stress levels increasing, it gradually expanded. Compared with that of the typical triaxial test, the cohesive force and the increasing internal friction angle increased. Further, as the confining pressure increased, the crescent-like hysteresis loops tapered, shear strength increased linearly, and the modulus of resilience increased nonlinearly; the latter’s rate of change, however, decreased. The change in volumetric strain was small during unloading as the stress level changed.

scholarly journals Behavior of granular rubber waste tire reinforced soil for application in geosynthetic reinforced soil wall

2015 ◽  
Vol 8 (4) ◽  
pp. 567-576 ◽  
Author(s):  
G. G. D. RAMIREZ ◽  
M. D. T. CASAGRANDE ◽  
D. FOLLE ◽  
A. PEREIRA ◽  
V. A. PAULON
Keyword(s):  
Clayey Soil ◽  
Reinforced Soil ◽  
Unit Weight ◽  
Triaxial Tests ◽  
Rubber Mixture ◽  
Waste Tire ◽  
Backfill Material ◽  
Geosynthetic Reinforced Soil ◽  
Rubber Waste ◽  
Reinforced Soil Wall

AbstractLarge quantities of waste tires are released to the environment in an undesirable way. The potential use of this waste material in geotechnical applications can contribute to reducing the tire disposal problem and to improve strength and deformation characteristics of soils. This paper presents a laboratory study on the effect of granular rubber waste tire on the physical properties of a clayey soil. Compaction tests using standard effort and consolidated-drained triaxial tests were run on soil and mixtures. The results conveyed an improvement in the cohesion and the angle of internal friction the clayey soil-granular rubber mixture, depending on the level of confining stress. These mixtures can be used like backfill material in soil retaining walls replacing the clayey soil due to its better strength and shear behavior and low unit weight. A numerical simulation was conducted for geosynthetic reinforced soil wall using the clayey soil and mixture like backfill material to analyzing the influence in this structure.

Polyurethane foams from oligomers derived from waste tire crumbs and polycaprolactone diols

2016 ◽  
Vol 133 (47) ◽  
Author(s):  
Suwat Rattanapan ◽  
Pamela Pasetto ◽  
Jean-François Pilard ◽  
Varaporn Tanrattanakul
Keyword(s):  
Polyurethane Foams ◽  
Waste Tire ◽  
Tire Crumbs

scholarly journals Triaxial Test and Mechanical Analysis of Rock-Soil Aggregate Sampled from Natural Sliding Mass

2015 ◽  
Vol 2015 ◽  
pp. 1-14 ◽  
Author(s):  
Shuling Huang ◽  
Xiuli Ding ◽  
Yuting Zhang ◽  
Wei Cheng
Keyword(s):  
Mechanical Behavior ◽  
Large Scale ◽  
Mechanical Response ◽  
Strain Curve ◽  
Friction Angle ◽  
Mechanical Analysis ◽  
Soil Aggregate ◽  
Hydropower Plant ◽  
Triaxial Tests ◽  
Confining Pressures

Rock-soil aggregate, as a specific geomaterial, exhibits complicated mechanical behavior. The rock-soil aggregate sampled from the deep layer of sliding mass at Jinpingzi area of Wudongde hydropower plant on Yangtze River is investigated to understand its mechanical behavior. Large-scale laboratory triaxial tests are conducted considering different gradations, stone contents and confining pressures. The results show that variation of stone content and gradation considerably affects the mechanical characteristics of rock-soil aggregate. Further, the influences of stone content, and gradation variation on stress-strain curve, Mohr-Coulomb criterion based shear strength parameters, Duncan-Chang model based deformation parameters, and internal friction angle are analyzed. A modified Rowe’s stress-dilatancy equation describing the mechanical response of rock-soil aggregate is then suggested.

Managing Sanding Risk in Sandstone Reservoir Through a New Constitutive Model

2021 ◽  
Author(s):  
Surej Kumar Subbiah ◽  
Ariffin Samsuri ◽  
Assef Mohamad-Hussein ◽  
Mohd Zaidi Jaafar ◽  
Yingru Chen ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Mechanical Behavior ◽  
Failure Criteria ◽  
Reservoir Rock ◽  
Triaxial Tests ◽  
Sand Production ◽  
Gas Field ◽  
Sandstone Rock ◽  
Sandstone Reservoir ◽  
Rock Mechanical Behavior

Abstract Sandstone reservoir failure during hydrocarbon production can cause negative impact on the oil/gas field development economics. Loss of integrity and hydrocarbon leakage due to downhole or surface erosion can decrease the risk of operational safety. Therefore, a proper understanding of the best formulation to manage and find the balance between productivity and sand risk is very important. Making decisions for the best and most economical completion design needs a full and proper sanding risk analysis driven by geomechanics modeling. The accuracy of modeling the reservoir rock mechanical behavior and the failure analysis depends on the selection of the constitutive model (failure criteria) specially to understand the failure and post failure mechanisms. Thus, an appropriate constitutive model/criterion is required as most of the current model/criteria are not developed for a weak rock material honoring the non-linearity and post failure (softening) process. Therefore, a new and novel elasto-plastic constitutive model for sandstone rock has been investigated and developed. The effort started with a sequence of triaxial tests at different confining pressures on core samples. Different types of rock have been tested during the developing and validation of the constitutive model. Comparison with other existing failure criteria was also performed. As the results, the newly developed constitutive model is better honoring the full spectrum of elasto-plastic rock mechanical behavior (softening and post-failure) which is important for oil and gas applications, specifically for sand production and drilling i.e. failure stabilization due to stress relief. The formulation and process are demonstrated with a case study for an old gas field, where a few gas wells have been shut-in due to severe sand production. The sand production predictive models have been validated with downhole pressure. The wells have been side-tracked and recompleted using the new sand failure prediction, using the new formulation resulted in restoring sand-free production at former rates. The novelty of this study would be in finding the right formula to best design the predictive model and to avoid any sand production when using the newly developed constitutive model.

Experimental Study of Granular Rubber Waste Tire Reinforced Soil for Geotechnical Applications

2014 ◽  
Vol 600 ◽  
pp. 585-596 ◽  
Author(s):  
Gary G.D. Ramirez ◽  
Michéle D.T. Casagrande
Keyword(s):  
Clayey Soil ◽  
Dry Weight ◽  
Reinforced Soil ◽  
Triaxial Tests ◽  
Confining Stress ◽  
Rubber Mixture ◽  
Angle Of Internal Friction ◽  
Waste Tire ◽  
Rubber Waste ◽  
Geotechnical Characteristics

Large quantities of waste tires are released to the environment in an undesirable way. The amount of this scrap is increasing every year. The potential use of this waste material in geotechnical applications can contribute to reducing the tire disposal problem and to improve strength and deformation characteristics of soils. This paper presents a laboratory study on the effect of granular rubber waste tire on the physical properties of a clayey soil. Clayey soil was mixed with 10% of granular rubber by dry weight. Grain size, Atterberg limits analyses and compaction tests using standard effort were performed on the clayey soil. Consolidated-drained triaxial tests at confining stresses of 50, 100, 200 and 400 kPa were run on soil and mixture. The results conveyed that the geotechnical characteristics are influenced by the addition of grained tire, improving the cohesion and the angle of internal friction the clayey soil-granular rubber mixture. This improvement depends on the level of confining stress. The compaction test results indicated that the dry unit weights and the optimum moisture for the mixture decreased in relation to clayey soil. Therefore, this mixture can be used as lightweight fill material due to its low specific weight, solving low bearing capacity and high settlement problems of embankments on soft compressible soils.

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