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Title:

Effectiveness of Aggregates in Mastic Asphalt Mixtures Concerning the Surface-Layer Properties Due to Long-Term Service Time and High Traffic Loading

Accession Number:

01658395

Record Type:

Component

Abstract:

Mastic asphalt pavements are a special construction method, which is particularly used in Germany for high traffic volume motorways. They are well known for their long service life. For the delivery of the mixture to the construction site special thermo-insulated trucks are needed. Due to its high amount of filler and binder the mixture includes a surplus of mortar. Therefore, during the construction process special types of paving screeds are needed. The surface properties of mastic asphalt layers, such as friction, abrasion resistances and surface reflectivity, particularly at the initial service life of a pavement, are highly influenced by the type and quality of the chippings used. So far, the effectiveness of aggregate materials concerning the surface layer properties with respect to long-term performance has not been investigated up to now. This study was carried out in order to investigate the significant influences of aggregates in the mastic mixture on the friction properties under high traffic volume during service life as well as to investigate whether the chippings remain crucial for the surface properties. The analysis included different measurements of skin resistance (SKM, GripTester, SRT), coarse texture measurements with the Sand Patch Test, quantification of chippings and investigations on the mastic asphalt mixtures. The results showed that high quality aggregates with high polishing resistance should be used to ensure a long pavement life (> 20 years). Therefore, using cheaper and low polish resistant aggregates in asphalt mixtures for the safe of cost savings are not worthwhile.

Supplemental Notes:

This paper was sponsored by TRB committee AHD18 Standing Committee on Pavement Preservation. Alternate title: Effectiveness of Aggregates in Mastic Asphalt Mixtures Concerning the Surface Layer Properties Due to Long-Term Service Time and High Traffic Loading.

Report/Paper Numbers:

18-00617

Language:

English

Authors:

Blumenfeld, Tim
Böhm, Stefan

Pagination:

18p

Publication Date:

2018

Conference:

Transportation Research Board 97th Annual Meeting

Location: Washington DC, United States
Date: 2018-1-7 to 2018-1-11
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References; Tables

Geographic Terms:

Germany

Subject Areas:

Highways; Materials; Pavements

Source Data:

Transportation Research Board Annual Meeting 2018 Paper #18-00617

Files:

TRIS, TRB, ATRI

Created Date:

Jan 8 2018 10:10AM