scholarly journals Comparison of Effects of Using Geosynthetics and Lime Stabilization to Increase Bearing Capacity of Unpaved Road Subgrade

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Erhan Burak Pancar ◽  
Muhammet Vefa Akpınar
Keyword(s):  
Bearing Capacity ◽  
Water Content ◽  
Clayey Soil ◽  
High Water ◽  
Soil Improvement ◽  
High Water Content ◽  
Lime Stabilization ◽  
The Road ◽  
Road Base ◽  
Optimum Water Content

So many soil improvement methods have been developed in order to increase bearing capacity of superstructure of the road to be constructed on the soft clayey road base soils, decrease settlements, and increase other strength specifications (CBR,k,MRvalues, etc.). In this paper, lime stabilization of clayey road base soil with high water content and its improvement with geosynthetics (geocell + geotextile) reinforcement and comparisons of these two different improvement methods were made. For this purpose, plate loading experimental comparisons of clayey soil, which had high water content by 10% increasing the optimum water content, were made after it was improved with lime at the rates of 3, 6, and 12%, geotextile reinforcement, geocell reinforcement, geosynthetics reinforcement, and geosynthetics reinforcement + lime stabilization at various rates. It was understood that these improvement methods will not yield sufficient results on clayey soils with high water content on their own, and method of improvement with lime and then reinforcement with geosynthetics yields better results on these types of soils. Only one improvement state among ten different states examined in this study gave the sufficient results for the soil to be used for unpaved roads.

scholarly journals Study on Shear Strength Characteristics of Marine Silt Modified by Steel Slag

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Liyan Wang ◽  
Bin Zhang ◽  
Hongmei Xie ◽  
Wenwei Ji ◽  
Xiang Huang
Keyword(s):  
Shear Strength ◽  
Bearing Capacity ◽  
Water Content ◽  
Steel Slag ◽  
Strain Curve ◽  
High Water ◽  
Absorption Capacity ◽  
Deviatoric Stress ◽  
Strength Characteristics ◽  
High Water Content

Modern coastal cities continue to expand to the sea, but the marine silt foundation has high water content and poor bearing capacity. Therefore, it is necessary to find economical and rapid ways to reduce the water content of the silt and improve the bearing capacity of the silt foundation. The steel slag is considered to be incorporated into silt to effectively reduce the moisture content of soil and improve the bearing capacity of the foundation due to its hard texture and strong water absorption capacity. In this paper, the shear strength characteristics of marine silt modified by steel slag were studied using an automatic triaxial instrument, as well as the relationship between steel slag incorporation and modified silt density. Experimental results showed that the incorporation of steel slag can effectively improve the shear strength of the silt. Besides, the influences of water content, steel slag incorporation, and confining pressure on the stress-strain curve characteristics and failure deviatoric stress of modified silt were also analyzed. The addition of steel slag increases the failure deviatoric stress of the silt. However, the increase of water content will weaken the effect of steel slag incorporation. The shear strength index of improved silt with different steel slag incorporation was compared with that of traditional soil, verifying the feasibility of its application in engineering construction.

scholarly journals Investigation of effect of water content on railway granular supplementary layers

2021 ◽  
pp. 64-68
Author(s):  
S Fischer
Keyword(s):  
Bearing Capacity ◽  
Water Content ◽  
Road Construction ◽  
High Water ◽  
Shear Resistance ◽  
The Other ◽  
High Water Content ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Rock Mining

Purpose. To determine the relationship between water content of continuously graded granular supplementary layers for railway substructure and their inner shear resistance and load bearing capacity. Methodology. Four different samples were produced as standard granular products from andesite. Two of them are common base courses for road construction in Hungary, the other two are common railway supplementary layers. The author performed laboratory measurements (multi-level shear box tests) that are adequate for the evaluation of inner shear resistance. The measurements of load bearing capacity and Proctor tests were executed in the laboratory of Colas Hungaria Ltd. The author performed measurements with the optimal water content values of each sample, as well as lower and higher values than them. This can show how the given granular material is sensible to the change of water content. Findings. It was proved that the granular supplementary layers, which are standardized products in road construction (as base courses), also seems to be adequate in railway construction; they are not so sensible to the variation of their water content. It does not mean that the other two granular layers are not adequate for railway substructures, but the application of road products have to be considered as substitute products. Originality. The author tried to emphasize the adequacy of rock mining for construction of ballasted railway tracks, as well as the optimal use of mineral wealth in every country with its results. Practical value. The obtained results of the present paper can be useful in the area of rock mining, and railway infrastructure engineering. During construction procedures the optimal water content values should be taken into considerations for compaction to be able to reach maximal compactness (density), but too high water content has to be avoided, which is based on the results. They can be also considered in the design phase.

scholarly journals Solid Waste Material Reuse Analysis: Filling the Road Subgrade with Riverway Silt and Sediment

2021 ◽  
Author(s):  
Qingzhou Wang ◽  
Liying Kong ◽  
Ming-Lang Tseng ◽  
Yang Song ◽  
Hongyu Wang
Keyword(s):  
Sensitivity Analysis ◽  
Solid Waste ◽  
Water Content ◽  
High Performance ◽  
High Water ◽  
Waste Material ◽  
Environmental Benefits ◽  
High Water Content ◽  
The Road ◽  
On The Road

Abstract This study proposes to explore solid waste material (SWM) reuse with the riverway silt and sediment, and examines the impacts of chemical composition on the road construction through sensitivity analysis. Considering the characteristics of silt mixture, it is necessary to investigate the modified materials to improve the mechanical feasibility for subgrade filling. In this study, modification schemes for construction waste and garbage slag presented well mechanical properties and environmental benefits in sensitivity analysis, especially for the high-water content silt modified by the garbage slag and lime mixture. The results indicate the lime-improved silt with medium water content is a cheap and high-performance material compared to the original silt. Moreover, modified silt demonstrated superior features in particle size, permeability and bearing capacity. Among six lime-improving schemes, the California bearer ratio (CBR2.5) increased from 7.1 to 19.6, while the minimum CBR2.5 was 2.45 times to the original silt. At last, this study proposes the engineering measures to improve the silt mixture subgrade to prevent heavy metals from polluting the water and soil environment. Further implications were also discussed.

scholarly journals ANALISIS DAYA DUKUNG TANAH TERHADAP KERUSAKAN JALAN DI DESA BULUTIGO KECAMATAN LAREN KABUPATEN LAMONGAN

2021 ◽  
Vol 13 (2) ◽  
pp. 53
Author(s):  
Miftahul Harits Abdullah ◽  
Rio Rahma Dhana
Keyword(s):  
Water Content ◽  
Carrying Capacity ◽  
High Water ◽  
High Water Content ◽  
Shear Strength Test ◽  
The Road ◽  
Average Value ◽  
Subgrade Soil ◽  
Cbr Test ◽  
High Plastic

Road damage in Bulutigo Village, Laren District, Lamongan Regency affects access to agricultural mobilization in Lamongan Regency. So the researchers studied the value of the carrying capacity of the soil that caused road damage on the Bulutigo Village road, Laren District, Lamongan Regency. This study also examines the factors that affect the decline in the value of the bearing capacity of the soil. Data processing shows that the road subgrade soil in Bulutigo Village, Laren District, Lamongan Regency has a low carrying capacity value in terms of water content testing with an average value of 16.66% which includes high water content, from the Atterberg limit, it is included in the class of clay soil type. has a high plastic value with a PI value of 34.61%. Meanwhile, in the CBR test, the CBR value was 6.80% which was included in the "enough" category. And in the direct shear strength test, the value of the internal shear angle () is 15.03o.

Influence of Water Content on the Strength of Silt Soil in Yellow River Alluvial Plain

2012 ◽  
Vol 256-259 ◽  
pp. 481-487
Author(s):  
Xiao Ming Yi ◽  
Song Gen Wang ◽  
Zhen Qing Liu ◽  
Gang Xu
Keyword(s):  
Elastic Modulus ◽  
Water Content ◽  
Yellow River ◽  
Friction Angle ◽  
Cohesive Soil ◽  
High Water ◽  
Alluvial Plain ◽  
High Water Content ◽  
Optimum Water Content ◽  
Influence Of Water

Hydrophilic characteristic of silt soil in Yellow River alluvial plain was studied in order to reveal the water content changes of silt. Then strength tests were used to research how engineering parameters such as elastic modulus, cohesion and friction angle change at different water content. The results show that high permeability coefficient and strong capillary are main factors to increase the water content, and the influence of capillary rising is greater than that of rainfall infiltration. The strength characteristic of silt soil is similar to the character of non-cohesive soil in low water content and that of clay in high water content. If the water content is greater than optimum water content, the elastic modulus and cohesion of silt shall decay obviously. Friction angle decreases dramatically as well, when the soil is saturated.

Hydrogels as Antibacterial Biomaterials

2018 ◽  
Vol 24 (8) ◽  
pp. 843-854 ◽  
Author(s):  
Weiguo Xu ◽  
Shujun Dong ◽  
Yuping Han ◽  
Shuqiang Li ◽  
Yang Liu
Keyword(s):  
Mechanical Properties ◽  
Drug Delivery ◽  
Tissue Engineering ◽  
Water Content ◽  
Oxygen Permeability ◽  
Structural Diversity ◽  
High Water ◽  
Clinical Applications ◽  
High Water Content ◽  
Biomedical Field

Hydrogels, as a class of materials for tissue engineering and drug delivery, have high water content and solid-like mechanical properties. Currently, hydrogels with an antibacterial function are a research hotspot in biomedical field. Many advanced antibacterial hydrogels have been developed, each possessing unique qualities, namely high water swellability, high oxygen permeability, improved biocompatibility, ease of loading and releasing drugs and structural diversity. In this article, an overview is provided on the preparation and applications of various antibacterial hydrogels. Furthermore, the prospects in biomedical researches and clinical applications are predicted.

Microwave-Induced Thermoacoustic Imaging for Embedded Explosives Detection in High-Water Content Medium

2019 ◽  
Vol 67 (7) ◽  
pp. 4803-4810 ◽  
Author(s):  
Xiong Wang ◽  
Tao Qin ◽  
Yexian Qin ◽  
Ahmed H. Abdelrahman ◽  
Russell S. Witte ◽  
...  
Keyword(s):  
Water Content ◽  
High Water ◽  
Explosives Detection ◽  
High Water Content ◽  
Thermoacoustic Imaging
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