Astm D454621 Pdf |top| Official

The load required to keep the specimen at its exact original height is recorded.

in greater detail to help you choose the right one.

Many university libraries and engineering firms provide free access to the ASTM Compass database for students and employees. astm d454621 pdf

for swell/collapse based on soil type.

The resulting swell or collapse (change in height) is recorded. Test Method B: Loading-Induced Compression The load required to keep the specimen at

After reaching the swell pressure, the specimen can be unloaded in increments to map its rebound/swell curve.

Load the specimen to the target vertical stress according to the selected method. Record deformation over time until primary consolidation/compression is complete. for swell/collapse based on soil type

The significance of ASTM D4546-21 lies in its ability to provide a standardized method for evaluating the frictional properties of bituminous mixtures. This information is essential for ensuring the safety and durability of pavement surfaces, as well as for optimizing pavement design and construction.

Performing tests to this standard requires specific laboratory equipment:

The specimen, sandwiched between porous stones, is placed inside the consolidometer cell. The displacement gauge is zeroed under a minimal seating load.

Depending on the chosen method (B or C), predetermined vertical increments of stress are applied to the dry sample.