ASTM D4546-21 PDF Download
Standard EN Sample
Standard Test Methods for One-Dimensional Swell or Collapse of Soils
Also Known As:
Significance and Use
5.1Â The wetting-induced swell/collapse strains measured from Test Methods A and B can be used to develop estimates of heave or settlement of a confined soil profile (1-4).4 They can also be used to estimate the magnitudes of the swell pressure (Fig. 3) and the free swell strain (percent swell under a pressure of 1 kPa (20 lbf/ft2)). The load-induced strains after wetting from Test Method C can be used to estimate stress-induced settlement following wetting-induced heave or settlement. Selection of test method, loading, and inundation sequences should, as closely as possible, simulate field conditions because relatively small variations in density and water content, or sequence of loading and wetting can significantly alter the test results (1, 5 and 6).
Note 1:Â The quality of the result produced by this standard is dependent on the competence of the personnel performing it and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depends on several factors; Practice D3740 provides a means of evaluating some of these factors.
| Descriptors | swell index, swell pressure, settlement, expansive soil, unsaturated soils,Soils,Deformation,ForceCOMMA Pressure,Physical Process,Physical Properties |
| ICS Codes | 93.020 - Earthworks. Excavations. Foundation construction. Underground works |
| Language(s) | English |
| File Size | 204.8 KB |
