TY - JOUR
T1 - Shearing Behavior of Interfaces between Tire-Derived Aggregate and Three Soil Materials
AU - Ghaaowd, I.
AU - Fox, P. J.
AU - McCartney, J. S.
N1 - Funding Information:
The authors thank the Powell Laboratory staff in the Department of Structural Engineering at the University of California-San Diego for assistance with the experimental program. Financial support from California Department of Resources Recycling and Recovery (CalRecycle) is gratefully acknowledged. The assistance and support of Stacey Patenaude and Bob Fujii of CalRecycle, as well as Joaquin Wright and Chris Trumbull of GHD, is also gratefully acknowledged. The contents of this paper reflect the views of the authors and do not necessarily reflect the views of the sponsor.
PY - 2020/6/1
Y1 - 2020/6/1
N2 - When tire derived aggregate (TDA) is used as a lightweight monolithic fill in civil engineering applications, such as embankments and retaining walls, the shearing behavior of TDA-interfaces with different materials should be carefully considered. This paper presents results from large-scale direct shear tests performed on interfaces between Type B TDA and layers of sand, aggregate, and clay for initial normal stress ranging from 19.0 to 76.7 kPa. To match field conditions, a separation nonwoven geotextile was used at the TDA-sand and TDA-clay interfaces, and a separation woven geotextile was used at the TDA-aggregate interface. Large shear displacements, typically between 200 and 350 mm, were required to fully mobilize the secant friction angle. Peak secant interface friction angles range from 26° to 32°, and peak strength envelopes are linear for the sand interface and nonlinear for the aggregate and clay interfaces. Failure envelopes for the TDA-soil interfaces are bounded above by the Type B TDA internal failure envelope and below by the Type B TDA-concrete interface failure envelope. A pair of replicate tests using woven and nonwoven geotextiles for the TDA-aggregate interface indicated that geotextile type had little effect on measured shear behavior as they only provide separation.
AB - When tire derived aggregate (TDA) is used as a lightweight monolithic fill in civil engineering applications, such as embankments and retaining walls, the shearing behavior of TDA-interfaces with different materials should be carefully considered. This paper presents results from large-scale direct shear tests performed on interfaces between Type B TDA and layers of sand, aggregate, and clay for initial normal stress ranging from 19.0 to 76.7 kPa. To match field conditions, a separation nonwoven geotextile was used at the TDA-sand and TDA-clay interfaces, and a separation woven geotextile was used at the TDA-aggregate interface. Large shear displacements, typically between 200 and 350 mm, were required to fully mobilize the secant friction angle. Peak secant interface friction angles range from 26° to 32°, and peak strength envelopes are linear for the sand interface and nonlinear for the aggregate and clay interfaces. Failure envelopes for the TDA-soil interfaces are bounded above by the Type B TDA internal failure envelope and below by the Type B TDA-concrete interface failure envelope. A pair of replicate tests using woven and nonwoven geotextiles for the TDA-aggregate interface indicated that geotextile type had little effect on measured shear behavior as they only provide separation.
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U2 - 10.1061/(ASCE)MT.1943-5533.0003213
DO - 10.1061/(ASCE)MT.1943-5533.0003213
M3 - Article
AN - SCOPUS:85082296409
SN - 0899-1561
VL - 32
JO - Journal of Materials in Civil Engineering
JF - Journal of Materials in Civil Engineering
IS - 6
M1 - 04020120
ER -