Geotechnical Parameters of Composite Soil

2011 ◽  
Vol 308-310 ◽  
pp. 1651-1655 ◽  
Author(s):  
Amin Chegenizadeh ◽  
Hamid Nikraz
Keyword(s):  
Natural Fiber ◽  
Fiber Content ◽  
Unit Weight ◽  
Embankment Dam ◽  
Geotechnical Parameters ◽  
Dry Unit Weight ◽  
Optimum Water Content ◽  
Compaction Characteristic ◽  
Optimum Water ◽  
Compaction Behaviour

Composite soils have been widely used in civil engineering applications, especially in slopes, embankment dam and landfills. This paper aims to investigate effect of fiber inclusion on compaction characteristic of composite soil (i.e. clay composite). A series of laboratory tests carried out to evaluate fiber effect on optimum water content and maximum dry unit weight of composite soils. Clay was selected as soil part of the composite and natural fiber was used as reinforcement. The fiber parameters differed from one test to another, as fiber length varied from 10 mm to 25mm and fiber content were selected as 0.1% and 0.3%. For each test, compaction curved derived and the results were compared. The results proved that inclusion of fiber affected compaction behaviour of samples so that increasing in fiber content and length caused increasing in Optimum Moisture Content (OMC) and slightly decreased maximum dry unit weight.

Bentonite Composite and Fibre

2013 ◽  
Vol 652-654 ◽  
pp. 38-42
Author(s):  
Amin Chegenizadeh ◽  
Hamid Nikraz
Keyword(s):  
Natural Fiber ◽  
Optimum Moisture Content ◽  
Fiber Content ◽  
Unit Weight ◽  
Embankment Dam ◽  
Dry Unit Weight ◽  
Optimum Water Content ◽  
Compaction Characteristic ◽  
Optimum Water ◽  
Compaction Behaviour

Composite soils have been widely used in civil engineering applications, especially in slopes, embankment dam and landfills. This paper aims to investigate effect of fiber inclusion on compaction characteristic of composite soil (i.e. clay composite). A series of laboratory tests carried out to evaluate fiber effect on optimum water content and maximum dry unit weight of composite soils. Clay was selected as soil part of the composite and natural fiber was used as reinforcement. The fiber parameters differed from one test to another, as fiber length varied from 10 mm to 20mm and fiber content were selected as 0.1% and 0.25%. For each test, compaction curved derived and the results were compared. The results proved that inclusion of fiber affected compaction behaviour of samples so that increasing in fiber content and length caused increasing in Optimum Moisture Content (OMC) and slightly decreased maximum dry unit weight.

Investigation on Compaction Characteristics of Reinforced Soil

2011 ◽  
Vol 261-263 ◽  
pp. 964-968 ◽  
Author(s):  
Amin Chegenizadeh ◽  
Hamid Nikraz
Keyword(s):  
Optimum Moisture Content ◽  
Reinforced Soil ◽  
Fiber Content ◽  
Unit Weight ◽  
Embankment Dam ◽  
Dry Unit Weight ◽  
Optimum Water Content ◽  
Compaction Characteristic ◽  
Optimum Water ◽  
Compaction Behaviour

Composite soils have been widely used in civil engineering applications, especially in slopes, embankment dam and landfills. This paper aims to investigate effect of fiber inclusion on compaction characteristic of composite soil (i.e. clay composite). A series of laboratory tests carried out to evaluate fiber effect on optimum water content and maximum dry unit weight of composite soils. Clay was selected as soil part of the composite and plastic fiber was used as reinforcement. The fiber parameters differed from one test to another, as fiber length varied from 10 mm to 35mm and fiber content were selected as 0.1% and 0.4%. For each test, compaction curved derived and the results were compared. The results proved that inclusion of fiber affected compaction behaviour of samples so that increasing in fiber content and length caused increasing in Optimum Moisture Content (OMC) and slightly decreased maximum dry unit weight.

Paper Reinforcement and Soil

2012 ◽  
Vol 608-609 ◽  
pp. 1741-1745
Author(s):  
Amin Chegenizadeh ◽  
Hamid Nikraz
Keyword(s):  
Optimum Moisture Content ◽  
Unit Weight ◽  
Reinforcement Effect ◽  
Embankment Dam ◽  
Test Compaction ◽  
Dry Unit Weight ◽  
Optimum Water Content ◽  
Compaction Characteristic ◽  
Optimum Water ◽  
Compaction Behaviour

Composite soils have been extensively used in civil engineering applications, especially in slopes, embankment dam and landfills. This paper aims to investigate effect of paper reinforcement inclusion on compaction characteristic of composite soil (i.e. clay composite). A series of laboratory tests performed to assess reinforcement effect on optimum water content and maximum dry unit weight of composite soils. Clay was selected as soil part of the composite and paper was used as reinforcement. The paper reinforcement parameters differed from one test to another, as paper length varied from 15 mm to 40mm and paper content were selected as 5% and 10%. For each test, compaction curved derived and the results were compared. The results proved that inclusion of paper affected compaction behaviour of samples so that increasing in paper content and length caused increasing in Optimum Moisture Content (OMC) and slightly decreased maximum dry unit weight.

Estimating compaction behavior of fine-grained soils based on compaction energy

2008 ◽  
Vol 45 (6) ◽  
pp. 877-887 ◽  
Author(s):  
Osman Sivrikaya ◽  
Ergun Togrol ◽  
Cafer Kayadelen
Keyword(s):  
Engineering Properties ◽  
Unit Weight ◽  
Fine Grained ◽  
Dry Unit Weight ◽  
Compaction Behavior ◽  
Optimum Water Content ◽  
Geotechnical Structures ◽  
Compaction Energy ◽  
Optimum Water

For successful designs of geotechnical structures, rational determination of the engineering properties of soils is an important process. In this context, compaction parameters, maximum dry unit weight (γdmax), and optimum water content (wopt) are required to be determined at various compaction energies. This paper proposes correlation equations that relate γdmax and wopt obtained from standard Proctor (SP) and modified Proctor (MP) tests to the index properties. To develop accurate relations, the data collected from the literature and the authors’ own database have been used. It has been found that while wopt has the best correlation with plastic limit (wp), γdmax can be estimated more accurately from wopt than it can from wp. In addition, the empirical methods including compaction energy (E) are described for estimating wopt and γdmax of fine-grained soils. The variables of the developed models for wopt and γdmax are wp, E, and wopt. It has been shown that the proposed correlations including the compaction energy will be useful for a preliminary design of a project where there is a financial constraint and limited time.

scholarly journals Estimation of Optimum Moisture Content and Maximum Dry Unit Weight of Fine-Grained Soils using Numerical Methods

2021 ◽  
Vol 18 (16) ◽  
Author(s):  
Armand Augustin FONDJO ◽  
Elizabeth THERON ◽  
Richard P. RAY
Keyword(s):  
Soil Compaction ◽  
Construction Projects ◽  
Large Scale ◽  
Unit Weight ◽  
Fine Grained ◽  
Dry Unit Weight ◽  
Optimum Water Content ◽  
Predicted Values ◽  
The Stability ◽  
Optimum Water

Soil compaction is one of the basic engineering techniques, which is carried out to guarantee the stability of soils dependent on specified strength. Nonetheless, in large-scale construction projects, the estimation of compaction features required tremendous effort and time that can be saved utilizing empirical relationships at the initial phases. It becomes critical to develop models to predict the compaction features, namely the maximum dry unit weight (γdmax) and optimum water content (WOP). This article attempts to develop models to predict the γdmax and WOP of fine-grained clay soils. Geotechnical tests such as grain size distribution, Atterberg limits, specific gravity, and proctor compaction tests are performed to assess soil samples' physical and hyro-mechanical characteristics. Multivariate analysis is conducted using MINITAB 18 software to develop the predictive models. The validation process of developed models includes the determination coefficient, probability value (p-value), comparison of the predicted values with experimental values, comparison of the models proposed in this study with other existing models found in the recent literature, and employing a different soil data set. The predicted values obtained from the models proposed in this research project are more accurate than other models developed recently. The proposed models estimate the compaction features of fine-grained clay soils with acceptable precision. HIGHLIGHTS Soil compaction is one of the basic engineering techniques perform to guarantee the stability of soils dependent on specified strength In large-scale construction projects, the estimation of compaction parameters required tremendous effort and time that can be saved utilizing empirical relationships at the initial phases This study has developed semi-empirical models to predict the compaction parameters (maximum dry unit weight and optimum water content) of fine-grained soils GRAPHICAL ABSTRACT

Automated Shear Test on Reinforced Clayey Sand

2011 ◽  
Vol 261-263 ◽  
pp. 1019-1023 ◽  
Author(s):  
Amin Chegenizadeh ◽  
Hamid Nikraz
Keyword(s):  
Shear Stress ◽  
Fiber Length ◽  
Shear Test ◽  
Natural Fiber ◽  
Fiber Content ◽  
Embankment Dam ◽  
Shear Tests ◽  
Clayey Sand ◽  
Direct Shear Tests ◽  
Strength Behavior

Composite soils have been widely used in civil engineering applications, especially in slopes, embankment dam and landfills. This paper aims to investigate effect of fiber inclusion on shear stress of composite soil (i.e. sand composite). A series of laboratory direct shear tests carried out to evaluate fiber effect on strength behavior of composite sand. Clayey sand was selected as soil part of the composite and natural fiber was used as reinforcement. The fiber parameters differed from one test to another, as fiber length were changed from 20 mm to 50 mm and fiber content were varied from 0.5% and 6%.Normal stress kept constant at 200 kpa. For each test, stress_ displacement graph derived and the results were compared. The results proved that inclusion of fiber affected strength behaviour of sand composite so that increasing in fiber content and length caused increasing in shear stress.

scholarly journals The effect of fine material amount on optimum water content of roller compacted concrete

2018 ◽  
Vol 6 (3) ◽  
pp. 1-10
Author(s):  
Kubilay Akçaözoğlu ◽  
Bedrettin Menemencioğlu
Keyword(s):  
Water Content ◽  
Unit Weight ◽  
Fine Aggregate ◽  
Roller Compacted Concrete ◽  
Fine Material ◽  
Limit Value ◽  
Optimum Water Content ◽  
Proctor Test ◽  
Aggregate Amount ◽  
Optimum Water

In this study the effect of fine material amount on the optimum water content of roller compacted concrete (RCC) was investigated. The fine aggregate was replaced with calcite which maximum particle size was 63 μ, in amount of 0%, 2%, 4%, 6%, 10% and 14% by weight of total aggregate. Six different mixtures were prepared in the study. The optimum water contents of the mixtures were determined by using modified proctor test. Optimum water content, maximum dry unit weight and maximum fresh unit weight of produced specimens were measured. Optimum water content of specimens decreased depending on increasing fine aggregate amount, however these values increased after a limit value. Maximum fresh and dry unit weights of specimens increased depending on increasing fine aggregate amount, however after a limit value the fresh and dry weights of specimens decreased.

scholarly journals A study into flexural, compressive and tensile strength of coir-concrete as sustainable building material

2019 ◽  
Vol 258 ◽  
pp. 01011
Author(s):  
Rilya Rumbayan ◽  
Sudarno ◽  
Adriana Ticoalu
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Natural Fiber ◽  
Construction Material ◽  
Fiber Content ◽  
Sustainable Construction ◽  
Unit Weight ◽  
Coir Fiber ◽  
Coconut Tree

Coir has been known as a potential natural fiber for many sustainable construction material developments due to its wide availability and sustainable resource of coconut tree. This research study aims to investigate the flexural, compressive and tensile properties of concrete incorporating coir fiber and to find the fiber content which gives optimum results. In this study, coir concrete specimens were cast and tested with variations of fiber content of 0%, 0.25%, 0.5%, 0.75%, and 1% by weight of aggregates. Flexural test was conducted based on SNI 4431:2011, compressive test was conducted based on SNI 1974:2011 and tensile test was conducted based on SNI 2491:2014. Slump tests and unit weight showed reduced values when fiber content was increased. Flexural, compressive and tensile strengths of coir-concrete at a 28-day curing were optimum for the variation with 0.25% fiber content. Compressive strength of control concrete at 28 days was approximately 23 MPa while BS-0.25 was 27.5 MPa. Flexural strength of control concrete was 5 MPa while BS-0.25 was 6 MPa. Tensile strength of control concrete was 3 MPa while BS-0.25 was 2.5 MPa. Results from the study showed that the presence of 0.25% fiber (by total weight of aggregate) in the concrete gives approximately 19% improvement in 28 days compressive strength and flexural strength.

Sign in / Sign up

Export Citation Format

Share Document