Journal
MATERIALS SCIENCE-MEDZIAGOTYRA
Volume 23, Issue 2, Pages 166-172Publisher
KAUNAS UNIV TECH
DOI: 10.5755/j01.ms.23.2.15798
Keywords
polyurethane bonded aggregate; permeability; compressive strength; elasticity modulus; flexural strength
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Funding
- CRSRI Open Research Program [CKWV2015210/KY]
- Natural Science Foundation of China [51409083, 51379069]
- Fundamental Research Funds for the Central Universities [2016B00214]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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In this paper the engineering performance of polyurethane (PUR) bonded aggregate were studied. The engineering performance, including compressive and flexural mechanical properties, void ratio, and coefficient of permeability were determined through laboratory tests. Moreover, the effects of two different curing conditions on the compressive strength properties of a PUR bonded aggregate were also evaluated. The compressive strengths of PUR bonded aggregates were found to be lower than that of conventional porous concrete, which is a commonly used cushion material. However, experimental results indicated a higher void ratio and coefficient of permeability, lower elasticity modulus, better toughness, and stronger adaptability to flexural deformation compared to porous concrete. Consequently, PUR bonded aggregate is a better solution than porous concrete when used as the cushion material of a geomembrane surface barrier for a high rock- fill dam.
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