Mechanical experiments and precise simulation of a novel functional material: Electrically conductive roller-compacted concrete
نویسندگان
چکیده
Electrically conductive roller-compacted concrete (ERCC) is a novel functional material, which can solve the problems of low efficiency artificial snow removal and deicing on expressway airport runway difficulty in temperature control dam engineering structures. In this study, we designed ERCC conducted an experimental study numerical simulations ERCC. The improvement mechanism surfactants fluidity slurry effects carbon-black dispersion were analyzed by scanning electron microscopy. Aiming at large core-sampling specimen formed rolling, macroscopic tests for mechanical properties mesoscopic X-ray computed tomography (XCT) conducted. Based experiment, precise simulation was performed coupling calculation methods continuous discontinuous mediums. We developed model based real aggregate. overcomes challenges high cost XCT models, discontinuous-medium methods, poor refinement traditional sphere/polyhedral aggregate models continuous-medium concrete. result shows that significantly improve effect ERCC, forming quality rolling construction technology positive with compressive strength 22.85 MPa, splitting 1.72 elastic modulus 23.7 GPa, pore volume ratio 1.05‰. mortar interface strengths constant, whereas increase aggregates, could be improved. results are consistent statistical laws material characteristics many practical projects, they have better applicability than meso-simulations
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ژورنال
عنوان ژورنال: Zhongguo kexue
سال: 2021
ISSN: ['1006-9267']
DOI: https://doi.org/10.1360/sst-2021-0164