Grains of gain. Roads & Bridges, Volume 52, Issue 5, 2014, pp 52-55

Project Details
STATE

TX

SOURCE

TRID

END DATE

06/01/14

RESEARCHERS

Rached, Marc; Fowler, David W.

SPONSORS

Texas Department of Transportation; FHWA

KEYWORDS

Artificial aggregates; Concrete pavements; Evaluation; Fine aggregates; Mix design; Portland cement concrete; Proportioning; Skid resistance; Studies

Project description

Manufactured fine aggregates are a product created when rocks are crushed using a mechanical crusher. With the depletion of sources of natural sands, the usage of manufactured fine aggregates has increased. Manufactured fine aggregates have properties that differ from natural sands; for this reason, the plastic and hardened properties of concrete produced using manufactured fine aggregates differ from the properties of concrete made with natural sands. The main concrete properties affected by the usage of manufactured fine aggregates are skid resistance, workability, and finishability. The aim of this research project was to investigate how manufactured fine aggregates could be used in concrete pavements without causing workability or skid related issues. To improve the workability of concrete made with manufactured fine aggregates, the use of the optimized mixture proportioning method developed by the International Center for Aggregate Research (ICAR) was investigated. Results obtained from this testing were used to make recommendations.
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