Laboratory Study of Full Depth Reclamation Mixes

The objective of this research was to develop a mix design for Full Depth Reclamation and to evaluate the performance of reclaimed pavement material. For this purpose an experimental program was undertaken to observe the effect of binder material and additives on reclaimed pavement material (RPM). The gradation of the reclaimed pavement material was done. For determining the MDD & OMC, the sample was subjected to Modified Proctor Compaction test as per IS 2720 (Part 8), the result of which, in turn, is used for determining the adequate amount of water for UCS test. Samples of mixes were prepared in the laboratory with RPM, water, cement (3%, 5%, and 7%) + Terrasil + Zycobond, cured for 7 days and were tested for Unconfined Compressive Strength {as per IRC: SP: 89: 2018 (Part II) & IS 4332 (Part V)-1970} and its result was used to select the optimum cement content for the reclaimed pavement material (which came out to be 5%). The existing crust pavement material stabilized with Terrasil + Zycobond and optimum cement content produced the 7 day & 28 day Unconfined Compressive Strength value which is well within the specified range of IRC (i.e. 4.5 to 7 MPa in 7 days). Using optimum cement content along with additive (Terrasil + Zycobond), Modified Proctor Compaction test was again carried out to observe its effect on MDD and OMC of FDR mix.