Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mechanical Properties of Recycled Concrete Aggregate and Recycled Asphalt Pavement Reinforced with Geosynthetics
Mechanical properties of recycled concrete aggregate (RCA) and recycled asphalt pavement (RAP) were evaluated for use as backfill in mechanically stabilized earth (MSE) walls. Large scale triaxial compression tests, interface direct shear tests, and pull-out tests were conducted to evaluate interaction of RCA and RAP with geosynthetics. Consolidated drained triaxial tests under sustained axial stress were conducted to evaluate creep potential of compacted RAP. Results show the compacted RCA and RAP samples tested herein have internal friction angles (ϕ') of 47o and 29o respectively which are within the typical range of ϕ' reported in the literature. Both RAP and RCA exhibited a higher interface friction angle (δ') with geogrids than with geotextiles. No slippage was observed between the RCA-geotextile and RCA-geogrid and the failures were due to rupture of the geotextiles and geogrids during the pullout test. RCA has higher interaction coefficient (Ci) with geosynthetics than RAP. The interaction coefficients for both RCA and RAP increase with normal stress. Results from creep tests showed that compacted RAP exhibits large deviator strains under sustained deviator stresses. Use of RAP and RCA in MSE walls are recommended if reinforced with geogrids only. To prevent creep failure of compacted RAP, maximum deviator stress in the backfill should be limited to 80% of compressive strength of compacted RAP.
Mechanical Properties of Recycled Concrete Aggregate and Recycled Asphalt Pavement Reinforced with Geosynthetics
Mechanical properties of recycled concrete aggregate (RCA) and recycled asphalt pavement (RAP) were evaluated for use as backfill in mechanically stabilized earth (MSE) walls. Large scale triaxial compression tests, interface direct shear tests, and pull-out tests were conducted to evaluate interaction of RCA and RAP with geosynthetics. Consolidated drained triaxial tests under sustained axial stress were conducted to evaluate creep potential of compacted RAP. Results show the compacted RCA and RAP samples tested herein have internal friction angles (ϕ') of 47o and 29o respectively which are within the typical range of ϕ' reported in the literature. Both RAP and RCA exhibited a higher interface friction angle (δ') with geogrids than with geotextiles. No slippage was observed between the RCA-geotextile and RCA-geogrid and the failures were due to rupture of the geotextiles and geogrids during the pullout test. RCA has higher interaction coefficient (Ci) with geosynthetics than RAP. The interaction coefficients for both RCA and RAP increase with normal stress. Results from creep tests showed that compacted RAP exhibits large deviator strains under sustained deviator stresses. Use of RAP and RCA in MSE walls are recommended if reinforced with geogrids only. To prevent creep failure of compacted RAP, maximum deviator stress in the backfill should be limited to 80% of compressive strength of compacted RAP.
Mechanical Properties of Recycled Concrete Aggregate and Recycled Asphalt Pavement Reinforced with Geosynthetics
Soleimanbeigi, A. (Autor:in) / Likos, W. (Autor:in)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 284-292
21.03.2019
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
| British Library Conference Proceedings | 2019
Hydraulic Properties of Recycled Asphalt Pavement and Recycled Concrete Aggregate
| British Library Conference Proceedings | 2012