Tire-Derived Aggregate as a Fill Material for Construction of Highway Embankment

摘要

This study investigates the construction and immediate compression behaviour of ahighway embankment made from two types of Tire Derived Aggregate (TDA) andTDA mixed with soil. The test embankment is 80 m long and contains four differenttest sections, each 20 m long. The four test sections are made of 1) TDA fromPassenger and Light Truck Tire (PLTT), 2) TDA from Off-The-Road (OTR) truck tire,3) TDA from PLTT mixed with soil at a 50/50 ratio by volume and 4) native soil(control section). The embankment is instrumented with 30 temperature probes, 25settlement plates, and six earth pressure cells. TDA was placed in two layers each, 3-mthick, and with 0.5-m-thick soil cap to separate the two layers and 1-m thick soil coveron the very top. Falling Weight Deflectometer (FWD) tests were also conducted on theembankment after the placement of the 1-m soil cover. The construction of theembankment was completed with conventional construction equipment without anymajor problems. Observations during the construction showed that the PLTT was moredifficult to spread and more compressible than the OTR. The temperature probesshowed no internal heating in the embankment during the construction. The settlementplates showed that the PLTT section was the most compressible section of all. FWDtests on top of the 1-m soil cover showed that the PLTT section deflects the most under all stress levels applied during the test.