Journal ArticleDOI
A comparative study of the grading coefficient, a new particle size distribution parameter
TLDR
In this paper, the importance of the particle size distribution (grading) of a gravel material for unsealed roads has been recognized and various parameters have been devised to allow interpretation of grading curves in terms of a single parameter for ease of application, control and comparison.Abstract:
The importance of the particle size distribution (grading) of a gravel material for unsealed roads has long been recognized. Various parameters have been devised to allow interpretation of grading curves in terms of a single parameter for ease of application, control and comparison. It is shown that there are significant correlations between many of the better known parameters, although it is also clear from the scatter of the data that the parameters probably indicate slightly different properties. The investigation has shown that a new parameter, the grading coefficient, is a good indicator of the grading and can be used interchangeably with many other parameters. In general terms the grading coefficient is approximately half the percentage gravel in a material and grading coefficients of 16 and 34 are roughly equivalent to grading moduli of 1.5 and 2.6, respectively.read more
Citations
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Journal ArticleDOI
Improved material specifications for unsealed roads
TL;DR: Performance-related specifications for the selection of gravel materials for use in unsealed roads were developed in South Africa in the late 1980s and shown that, when the material fully complies with these specifications, and the materials are compacted to a high density, the actual performance of the road is even better than predicted by the models.
Journal ArticleDOI
A gradation-dependent particle shape factor for characterizing small-strain shear modulus of sand-gravel mixtures
TL;DR: In this paper, the effect of particle shape on the small-strain shear modulus (Gmax) was investigated using a customized, large-scale triaxial apparatus.
Journal Article
The relationship between index testing and California Bearing Ratio values for natural road construction materials in South Africa
TL;DR: In this article, a relationship between index testing and CBR (California Bearing Ratio) results is investigated. But the results proved poor and this is ascribed to data variability, in turn, is the result of test methods with poor reproducibility and repeatability.
Geotechnical properties of oil contaminated soil
TL;DR: In this paper, the effect of oil contamination on grading modulus, Atterberg limits, compaction, and hydraulic conductivity of bentonite-kaolinite-sand mixtures was investigated.
Journal ArticleDOI
Direct Shear Tests with Evaluation of Variable Shearing Area
Šarūnas Skuodis,Tadas Tamošiūnas +1 more
TL;DR: In this paper, the authors investigated the soil shear strength properties for Baltic Sea shore sand along Klaipėda city and determined the sand angle of internal friction (φ) and cohesion (c) via two different direct shear tests procedures.
References
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Book
Principles of Pavement Design
TL;DR: In this paper, the authors discuss the design of Flexible Airport Pavements and Rigid Highway Paves, as well as their application in the construction of highway and airport road networks.
Journal ArticleDOI
Classification and Identification of Soils
TL;DR: In this paper, the authors reviewed and compared existing soil classifications used in civil engineering, with emphasis on their limitations and presented a new soil grouping with a new classifier for soil classification.
Dissertation
The influence of geotechnical properties on the performance of gravel wearing course materials
Book ChapterDOI
A Review of Engineering Soil Classification Systems
TL;DR: In this article, the NATURE and NECESSity of SOIL classification and the difference between SOIL Iidentification and SOIL Classification are discussed with particULAR reference to TRANSPORTATION ENGINEERING.