The use of diatomite in the stone mastic asphalt mixture

On Turkish highways, the increasing high volume of annual average daily traffic (AADT) and over loading and addition of negative effects of climate and construction conditions cause permanent deformations such as fatigue cracking, rutting and shoving. The most common deterioration type is rutting due to heavy vehicles and their overloading. It can be say that permanent deformation behaviors of SMA (Stone Mastic Asphalt) mixtures are better than the other hot mix types under all climate conditions and under heavy traffic loads. In this aspect, the use of SMA mixtures provides significant advantages in improving the performance of pavements. Improving the advanced type of the SMA mixtures and increasing application of SMA mixtures are very important to prolong pavement life. For this purpose, 3% diatomite was used as filler aggregate in the SMA mixtures without adding any fiber. A performance comparison was made between diatomite added and conventional SMA mixtures. For that purpose, Marshall Designs were prepared for diatomite added and conventional SMA mixtures. For these two types of SMA mixtures; the rutting tests were performed to find out plastic deformation behaviors and the fatigue lives were determined using a four point bending beam fatigue test. Indirect tensile tests were also carried out on the SMA mixtures. The results indicated that, diatomite addition, increased stiffness and similar test results were found for other properties, Except that the fatigue life of diatomite-added SMA was slightly lower than conventional SMA mixture. For the covering abstract see ITRD E157233

• Authors:
  • ATASARAL, M
  • GUNGOR, A G
  • ORHAN, F
  • KASAK, S
  • CUBUK, M K
• Publication Date: 2008

Language

• English

Media Info

• Pagination: 10p
• Serial:
  • PROCEEDINGS OF THE 4TH EURASPHALT AND EUROBITUME CONGRESS HELD MAY 2008, COPENHAGEN, DENMARK
  • Publisher: EUROPEAN ASPHALT PAVEMENT ASSOCIATION (EAPA)

Subject/Index Terms

• TRT Terms: Aggregates; Conferences; Deformation; Durability; Fibers; Fillers (Materials); Marshall test; Mix design; Pavement design; Prevention; Rutting; Stone matrix asphalt; Test procedures
• Geographic Terms: Turkey
• ITRD Terms: 4577: Aggregate; 8525: Conference; 5595: Deformation; 5910: Durability; 4557: Fibre; 4599: Filler; 6290: Marshall; 4714: Mix design; 3055: Pavement design; 9149: Prevention; 3081: Rutting (wheel); 4999: Stone mastic asphalt; 6288: Test method; 8117: Turkey
• Subject Areas: Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 01336626
• Record Type: Publication
• Source Agency: TRL
• Files: ITRD
• Created Date: Apr 15 2011 4:11PM