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Matric Suction in Recycled Unbound Granular Materials
The matric suction within unbound granular materials (UGMs) can be small when compared with cohesive soil; however, suction can influence the engineering behavior of UGMs. Unfortunately, there are few studies on the potential matric suction in UGMs. This paper presents matric suctions for seven recycled products and one virgin aggregate. The products were recycled concrete aggregate (RCA) and recycled clay masonry blended with RCA. The percentage of masonry in the blended materials varied between 10% and 30% by mass. Soil water characteristic curves (SWCC) were established for each material by preparing samples at various moisture contents and measuring matric suction with filter papers in contact with the soil. To define the wet end of the SWCC, further samples were conditioned on a tension plate using a hanging water column. The recycled products had suctions higher than the virgin aggregate at an equivalent moisture state. Air entry values and residual suctions were determined for each material. Three published models were applied to fit SWCCs to the experimental data. Generally these models provided good fits to the data for each UGM. The influence of matric suction on both resilient modulus and permanent strain of the recycled materials are presented.
Matric Suction in Recycled Unbound Granular Materials
The matric suction within unbound granular materials (UGMs) can be small when compared with cohesive soil; however, suction can influence the engineering behavior of UGMs. Unfortunately, there are few studies on the potential matric suction in UGMs. This paper presents matric suctions for seven recycled products and one virgin aggregate. The products were recycled concrete aggregate (RCA) and recycled clay masonry blended with RCA. The percentage of masonry in the blended materials varied between 10% and 30% by mass. Soil water characteristic curves (SWCC) were established for each material by preparing samples at various moisture contents and measuring matric suction with filter papers in contact with the soil. To define the wet end of the SWCC, further samples were conditioned on a tension plate using a hanging water column. The recycled products had suctions higher than the virgin aggregate at an equivalent moisture state. Air entry values and residual suctions were determined for each material. Three published models were applied to fit SWCCs to the experimental data. Generally these models provided good fits to the data for each UGM. The influence of matric suction on both resilient modulus and permanent strain of the recycled materials are presented.
Matric Suction in Recycled Unbound Granular Materials
Azam, A. M. (author) / Cameron, D. A. (author) / Gabr, A. G. (author) / Rahman, M. M. (author)
Geo-Congress 2014 ; 2014 ; Atlanta, Georgia
Geo-Congress 2014 Technical Papers ; 1367-1376
2014-02-24
Conference paper
Electronic Resource
English
Matric Suction in Recycled Unbound Granular Materials
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