Influence of moisture on Resilient Deformation behaviour of Unbound Granular Materials
2014 (English)In: Asphalt Pavements - Proceedings of the International Conference on Asphalt Pavements, ISAP 2014, 2014, 571-580 p.Conference paper (Refereed)
This study investigated the influence of moisture on the Resilient Deformation (RD) properties of Unbound Granular Materials (UGMs). A typical UGM used in pavement constructions with three different grain size distributions were tested with a range of moisture contents using Repeated Load Triaxial tests (RLTTs). From the European standard, the procedure for the study of the RD behaviour was used where each stress path is applied for 100 cycles. Additionally, the Multi-Stage (MS) loading procedure for the study of the permanent deformation behaviour were used where each stress path is applied for 10,000 cycles, to compare the results using the two test procedures. Results showed that resilient modulus (MR) generally decreased with increase in moisture, where the finer grading was more affected. However, for the MS RLTTs, after a large number of load applications, some increase in MR with increasing moisture was observed. This happened when the moisture content increased up to close to the optimum; above the optimum, MR always decreased. This may be due to Post-Compaction (PC) aided by moisture in MS RLTTs where a large number of load cycles were applied.
Place, publisher, year, edition, pages
2014. 571-580 p.
Moisture, Repeated-Load Triaxial test, Resilient modulus, Unbound Granular Materials, Asphalt pavements, Grading, Granular materials, Moisture determination, Stress analysis, Testing, Deformation behaviour, European Standards, Grain size distribution, Pavement construction, Permanent deformations, Repeated load triaxial tests, Unbound granular material
IdentifiersURN: urn:nbn:se:kth:diva-167868ScopusID: 2-s2.0-84904137196ISBN: 9781138027121OAI: oai:DiVA.org:kth-167868DiVA: diva2:821240
12th International Conference on Asphalt Pavements, ISAP 2014, 1 June 2014 through 5 June 2014, Raleigh, NC
QC 201506152015-06-152015-05-222015-06-15Bibliographically approved