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Viscosity testing lab va10/28/2023 Thus, the weight of aggregates required to fill a container with a known volume is an indirect measure of the shape and surface texture.įor coarse aggregates, an excess of long slender aggregates causes bulking of the aggregates and inhibits compaction. On the other hand, aggregates with a rounded shape and smooth surface will readily fall into a dense configuration. The fine aggregate angularity test uses the concept that when aggregates with a rough texture and angular share allowed to fall freely into a container the friction between the particles will prevent them from achieving a dense configuration. Superpave requires two tests to control aggregate shape and texture. Superpave places strict controls on the characteristics of aggregates to ensure the aggregates are compatible with the performance objectives. Aggregate properties play a vital role in the performance of asphalt concrete.
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