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Showing 1 to 20 of 39 for “"Geotextiles"”.
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Lifetime Prediction of Geotextiles
No abstract prepared.
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HYDRAULIC COMPATIBILITY OF GEOTEXTILES FILTERING RECYCLED MATERIALS
… filters and long-term performance of these geotextiles are essential. A series of long-term filtration (LTF) tests were performed to evaluate the hydraulic compatibility of several woven and nonwoven geotextiles with four recycled materials commonly used in construction (recycled concrete …
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Filtration behaviour of non-woven geotextiles in the gradient ration test
… which have a D85 from 70 Am, with four nonwoven geotextiles, which have a filtration opening size (FOS) from 60 Am to150 Am. No observations of impending clogging were made, however piping occurred in some tests. A ratio of FOS/D85 < 1.5 has been found to be appropriate effective retention of …
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Effectivess of Using Geotextiles in Flexible Pavements: Life-Cycle Cost Analysis
Using geotextiles in secondary roads to stabilize weak subgrades has been a well accepted practice over the past thirty years. However, from an economical point of view, a complete life cycle cost analysis (LCCA), which includes not only costs to agencies but also costs to users, is urgently needed …
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Puncture resistance of geotextiles and evaluation of the g-rating classification system
The puncture resistance of geotextiles in Australia is measured in terms of the G-Rating, which is the product of CBR and drop cone puncture test results. CBR and drop cone puncture tests were conducted on 24 geotextiles to provide up-to- date results, and to evaluate the G-Rating. CBR puncture …
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Measurements and effects of fiber orientations on engineering properties of non-woven geotextiles
The use of non-woven geotextiles has been increasing exponentially since the 1970s. Due to the lack of understanding in the structural characteristics of non-woven geotextiles, the semi-empirical design of non-woven geotextiles used in different fields of applications are still being used. The …
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Using palm-mat geotextiles for soil conservation on arable loamy sands in the United Kingdom
To date, most studies on the effectiveness of geotextiles on soil erosion rates were conducted in laboratory experiments for <1 h. Hence, at Hilton, East Shropshire, UK, this study investigated the effectiveness of palm-mat geotextiles (Borassus and Buriti mats) in reducing rainsplash erosion, …
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Deformation prediction of geosynthetic reinforced soil retaining walls
… sands, two polypropylene nonwoven needle-punched geotextiles, three polypropylene woven slit-film geotextiles, and a multi-filament polyester woven geotextile were the focus of the testing program. In-soil testing of the geotextiles was performed using a plane strain unit cell device. Tension …
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ΘΕΩΡΗΤΙΚΗ ΚΑΙ ΠΡΑΚΤΙΚΗ ΔΙΕΡΕΥΝΗΣΗ ΤΗΣ ΕΦΑΡΜΟΓΗΣ ΤΩΝ ΓΕΩΦΑΣΜΑΤΩΝ ΣΤΗΝ ΕΝΙΣΧΥΣΗ ΔΡΟΜΩΝ ΧΑΜΗΛΗΣ ΚΥΚΛΟΦΟΡΙΑΣ
… CONCERNING THE PROPERTIES AND APPLICATIONS OF GEOTEXTILES. 2. FUNCTIONS ACCOMPLISHED BY A GEOTEXTILE LAID IN THE INTERFACE BETWEEN ANUNPARED PAVEMENT AND THE SUBGRADE. 3. PRESENTATION OF THE RESEARCH ARTICLES CONCERNING THE DESIGN OF WEAK PAVEMENTS EITHER REINFORCED OR NOT WITH GEOTEXTILES. 4. …
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Experimental and numerical investigation into the Sand/Geotextile shear interaction behaviour
Geotextiles are planar polymeric textile materials which are utilised in geotechnical engineering in various applications, including the reinforcement of soils which is achieved by laying geotextile sheets horizontally to carry the induced horizontal stresses. The behaviour of such reinforced soil …
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Determinación de las características de fricción en el contacto suelo-geotextil a diferentes succiones, mediante equipos de laboratorio singulares
… se han realizado entre dicho suelo y 3 tipos de geotextiles de PP no tejidos agujeteados. Uno de ellos incorpora un refuerzo de cordones de PET. Se han realizado series de ensayos con succiones totales entre 2 y 20 MPa, y succiones matriciales entre 5 kPa y 1 MPa. También se ha valorado el …
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Accelerated Testing of Separation Layers for Open-Graded Drainage Layers
… separation layers investigated included nonwoven geotextiles and a dense-graded base aggregate blend. Specimens were housed in a stiff wall Plexiglas cylinder during testing. Tests were conducted at various loading levels and durations in order to develop the accelerated testing procedure. …
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Geomorphology and rehabilitation of erosion-degraded areas using soil bioengineering in the Rio Bacanga basin, São Luís, Maranhão State
… using soil bioengineering techniques (using geotextiles constructed from palm leaves of the Buriti tree). Mapping showed that identified gullies are located on the plateau edges of the basin and are very fragile environments. The greatest interval of vegetation cover index development was …
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Control de la erosión en desmontes originados por obras de infraestructura viaria : aplicación al entorno de Palencia capital
… los ensayos se desprende la gran eficacia de los geotextiles orgánicos con un control de erosión > 99% y un mayor grado de revegetación. Se realiza un valoración eficacia-coste mediante un análisis a cinco años que indica que la lucha contra la erosión es efectiva con un ahorro que puede ir del …
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Ensaios de filtração em solos com geotêxteis
… it presents the usual parameters to describe the geotextiles characteristics, the involved phenomena in the geotextile-soil interaction and the more accepted criteria for geotextile filter selection. Supported by previous researches, a filtration apparatus was developed for laboratory tests, based …
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Improving the design, construction, and maintenance of Permeable Interlocking Concrete Pavement (PICP) in South Africa
… on the role that different pavers and upper geotextiles played in the clogging process were conducted at the University of Cape Town (UCT). The investigations identified four types of clogging mechanisms: i) Type I is when sediment fills up the top 30 mm of the joints, ii) Type II is when the …
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Effect of grading and grain size on the friction characteristics of a sand/geotextile inteface
… addresses the reinforcement function whereby geotextiles are utilised as reinforcing elements in reinforced slopes and fills. It particularly focuses on the soil/geotextile interface behaviour. Geotextile reinforcements transfer a majority of the shear stress from the soil to the reinforcement …
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Laboratory Performance of Geosynthetic-Stabilized Pavement Sections
… and three which were stabilized with one of two geotextiles or a geogrid. The pavement sections were constructed to model a typical secondary road in Virginia which is constructed over a silty sand subgrade material. Loading of the pavement sections was accomplished through the use of a …
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The link between Permeable Interlocking Concrete Pavement (PICP) design and nutrient removal
… aggregates; the presence and location of any geotextiles; the type of outlet; and the time period between rain events. While some research on the treatment of stormwater by PICP has been published, not enough is known about the relative performance of different PICP designs. This dissertation …
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Manufacturing bio-tiles
… strength of the bio-tiles. Pre-seeding of the geotextiles with CaCO3 was explored and the mass of seeds initially present on the geotextiles was found to offer significant improvement to the breaking strength of 21-82%, increasing with seed loading. These bio-tiles were able to far exceed the …
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