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Title:

Influence of Aggregate Properties on Concrete Mechanical Performance

Accession Number:

01628588

Record Type:

Component

Abstract:

While the effect of paste properties on concrete performance has been extensively studied, the influence of aggregate characteristics on concrete performance has not been investigated in detail. Based on previous research that demonstrated significant strength differences for two similar concrete mixtures, one prepared with limestone aggregates and the other with siliceous gravel, a joint study between the National Institute of Standards and Technology (NIST) and the Federal Highway Administration (FHWA) was initiated to explore in detail the influence of aggregate properties on concrete mechanical performance. Eleven aggregates of differing mineralogy were identified and obtained both for bulk characterization and for incorporation into two concrete mixtures. The first concrete mixture was based on a 100 % ASTM Type I/II ordinary portland cement, while the second consisted of a volumetric blend of 60 % of this cement, 30 % of a Class C fly ash and 10 % of a fine limestone powder. The results show a wide variation in concrete performance amongst the different aggregates. Several of the aggregate properties were found to have some influence on the concrete performance, but the extent of this effect depends mainly on the concrete property. Nevertheless, it appears that the greatest aggregate impact is how its modulus of elasticity relates to the paste modulus of elasticity. Data presented herein suggest that concrete performance is largely controlled by the level of bonding between aggregates and cement paste, a property that was only assessed in an indirect manner in the present study.

Supplemental Notes:

This paper was sponsored by TRB committee AFP70 Standing Committee on Aggregates.

Monograph Accession #:

01618707

Report/Paper Numbers:

17-01716

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Tanesi, Jussara
Bentz, Dale P
Jones, Scott Z
Mengesha, Beyene
Kim, Haejin
Ardani, Ahmad
Arnold, Joshua
Stutzman, Paul E

Pagination:

20p

Publication Date:

2017

Conference:

Transportation Research Board 96th Annual Meeting

Location: Washington DC, United States
Date: 2017-1-8 to 2017-1-12
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Subject Areas:

Highways; Materials

Source Data:

Transportation Research Board Annual Meeting 2017 Paper #17-01716

Files:

TRIS, TRB, ATRI

Created Date:

Dec 8 2016 10:35AM