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Romanian Journal of Transport Infrastructure

The Journal of Technical University of Civil Engineering Bucharest

2 Issues per year

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Online
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2286-2218
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Asphalt Mixtures with Limestone Aggregate for Base Layer

Carmen Răcănel
  • Assoc.Prof.PhD.eng., Technical University of Civil Engineering Bucharest, The Faculty of Railways, Roads and Bridges
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/ Mihai Dicu / Ştefan Marian Lazăr
  • Lecturer PhD.eng., Technical University of Civil Engineering Bucharest, The Faculty of Railways, Roads and Bridges
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/ Adrian Burlacu
  • Assistant PhD.eng., Technical University of Civil Engineering Bucharest, The Faculty of Railways, Roads and Bridges
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Published Online: 2015-02-06 | DOI: https://doi.org/10.1515/rjti-2015-0004

Abstract

Asphalt mixtures are mixtures of mineral aggregates, filler, bitumen and eventually additives in proportions determined by recipe designed in the laboratory. Asphalt mixtures used as base course are bituminous concrete.

The natural aggregates are granular materials of mineral origin that come from natural or artificial crushing of the rocks. In our country there are the various rocks: eruptive or magmatic rocks, metamorphic rocks, sedimentary rocks.

To the category of sedimentary rocks belong limestone. Sedimentary rocks are characterized by relatively high porosity and a pronounced stratification, which causes mechanical resistance to be low and vary by direction of load. Due to the structure less dense and weaker mechanical resistance, the limestone are used less in heavy traffic pavement structures.

This paper presents an asphalt mixture recipe for the base layer developed in the Laboratory of Roads from Technical University of Civil Engineering Bucharest (TUCEB), using limestone aggregates extracted from Hoghiz Quarry. The paper contains laboratory test results to determine the recipe and laboratory findings leading to the schedule of product.

Résumé

Mélanges asphaltiques sont des mélanges de granulats minéraux, de charge, du bitume et éventuellement des additifs, dans certaines proportions déterminées par la recette conçue au laboratoire. Mélanges d'asphalte utilisés comme couche de base sont les enrobé bitumineux.

Les granulats naturels sont des matériaux granuleux d'origine minérale qui proviennent de naturel ou artificiel concassage des roches. Dans notre pays, il ya les différentes roches: roches éruptives ou magmatiques, roches métamorphiques, roches sédimentaires.

Dans la catégorie des roches sédimentaires calcaires appartiennent. Les roches sédimentaires se sont caractérisés par une faible porosité élevée et une stratification prononcée, ce qui provoque la résistance mécanique est faible et varie en direction de la charge. En raison de la structure moins dense et plus faibles résistance mécanique, les calcaires sont moins utilisés dans les structures de chaussées du trafic routier lourdes.

Cet article présente une recette de mélange d'asphalte pour la couche de base développé au Laboratoire des Routes de l'Université Technique de Génie Civil de Bucarest (UTGCB), en utilisant des granulats calcaires extraites de la Carrière Hoghiz. Le document contient les résultats des tests de laboratoire pour déterminer la recette et les résultats de laboratoire conduisant à l'annexe de produit.

Keywords: limestone aggregates; asphalt mixture; Marshall; module of stiffness; creep; fatigue

Mots-clés: granulats calcaires; le mélange d'asphalte; Marshall; module de rigidité; de fluage; fatigue

References

  • [1]. “The use study of limestone aggregates made available by the beneficiary to the realization of asphalt mixtures for base layer”, TUCEB Research Contract - Research Center ROADS and AIRPORTS, no. 215/06.07.2011.Google Scholar

About the article

Published Online: 2015-02-06

Published in Print: 2012-12-01


Citation Information: Romanian Journal of Transport Infrastructure, Volume 1, Issue 1, Pages 36–49, ISSN (Online) 2286-2218, DOI: https://doi.org/10.1515/rjti-2015-0004.

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© 2015. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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