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A simplified approach for mix design based on shape factors of coarse aggregates

Choix de la formulation des enrobes fonde sur la forme des gravillons

  • International Symposium on Aggregates
  • Theme IV Aggregates for Pavements
  • Published:
Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur Aims and scope Submit manuscript

Abstract

The stability of granular materials and bituminous mixes increases with increase in dry density or decrease in voids in the mix. Therefore the proportions of materials in the mix are designed to obtain a desired gradation which yields maximum density.

An investigation was carried out on gradation requirements of the mixes to obtain maximum density and stability values, using coarse aggregates with different shape factors. It is found that there is an optimum value of gradation index n of the gradation equation: p%=100 dn/D, for an aggregate with a given value of angularity number. N. A. correlation between values of N and n has been obtained which can be used advantageously in mix design.

Résumé

La stabilité des matériaux granulaires et des mélanges bitumineux augmente avec la compacité ou avec la diminution des vides dans le mélange. C'est pourquoi la granularité du mélange est déterminée pour obtenir la densité maximale.

Une recherche a été faite sur l'optimisation de la granularité des mélanges pour obtenir des valeurs maximales de densité et de stabilité en utilisant des gravillons avec différents facteurs de forme. Il se trouve qu'il existe une valeur optimale de l'indice “n” donné par l'équation de la granularité p%=100 dn/D pour un granulat ayant une angularité N donnée. Une relation entre N et n est obtenue et peut être utilisée pour déterminer la granularité du mélange.

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References

  1. AMERICAN SOCIETY FOR TESTING MATERIALS (1944): “Tentative Specification for Materials for Stabilised Base and Surface Courses”, Designation D 556-40T and D 557-40T. Book of A.S.T.M. Standards including Tentative Standards.

  2. BRITISH STANDARDS INSTITUTION (1943): “Sampling and Testing of Mineral Aggregates, Sands and Fillers”,British Standard Specification No. 812: 1943.

  3. COMPEN W.H. and SMITH J.R. (1948): “A Study of the Role of Angular Aggregates in the Development of Stability in Bituminous Mixtures”.Proceedings. Association of Asphalt Paving Technologists, vol. 17.

  4. DSIR (1951): “Soil Mechanics for Road Engineers”, Her Majesty's Stationery Office, London.

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  5. FULLER W.B. and THOMPSON S.E. (1907): “Law of Proportioning Concrete”,Transactions American Society of Civil Engineers, Vol. 59.

  6. HERRIN M and GOETZ W.H. (1954): “Effect of Aggregate shape on Stability of Biturninous Mixes”,Proceedings Highway Research Board (Washington), Vol. 33.

  7. IRC (1977): “Tentative Specification for 4 cm Asphaltic Concrete Surface Course”, Indian Roads Congress.

  8. KHANNA S.K., JUSTO C.E.G. and SURENDRA Kumar (1971): “Design of Soil Aggregate Mixtures for Base Courses”,Road Research Bulletin No. 15, Indian Roads Congress.

  9. MILLER E.A. and SOWERS G.F. (1957): “The Strength Characteristics of Soil—Aggregate Mixtures”Highway Research Board (Washington), Bulletin No. 183.

  10. TALBOT A.N. and RICHORT F.B. (1923): “Strength of Concrete”, Bulletin 137, University of Illinois Engineering Experiment Station”.

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Authors and Affiliations

  1. Ministry of Shipping and Transport, Civil Engineering Department, Bangalore University, 560 056, Bangalore, India

    Rajagopal A. S. & Veeraragavan A.

  2. Bangalore University, 560 056, Bangalore, India

    Justo C. E. G.

Authors
  1. Rajagopal A. S.
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  2. Veeraragavan A.
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  3. Justo C. E. G.
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Rajagopal, A.S., Veeraragavan, A. & Justo, C.E.G. A simplified approach for mix design based on shape factors of coarse aggregates. Bulletin of the International Association of Engineering Geology 30, 123–126 (1984). https://doi.org/10.1007/BF02594292

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  • DOI: https://doi.org/10.1007/BF02594292

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