Improved phyllite packing of CBR value influence factor analysis

Zhu, Fengjie; Mao, Xuesong; Li, Wenlin; Zhang, Haining

doi:10.2991/mmebc-16.2016.307

Cited by 1 publication

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“…The improved filling technology of phyllite subgrade was studied in combination with the field test section, and it was found that after the road performance was greatly improved after phyllite was mixed with cement, thus fully meeting the requirements of subgrade filling, and hence, it can be regarded as qualified subgrade filling [6]. Zhu studied the gradation, strength, compaction characteristics, and CBR (California bearing ratio) of phyllite before and after improvement and concluded that phyllite can be used as subgrade filler after improvement [27]. Cen compared and analyzed the test situation of improving the phyllite subgrade with cements of different grades.…”

Section: Introductionmentioning

confidence: 99%

Investigation on cement-improved phyllite based on the vertical vibration compaction method

Jiang

Fan

et al. 2021

PLoS ONE

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The vertical vibration compaction method (VVCM), heavy compaction method and static pressure method were used to form phyllite specimens with different degrees of weathering. The influence of cement content, compactness, and compaction method on the mechanical properties of phyllite was studied. The mechanical properties of phyllite was evaluated in terms of unconfined compressive strength (Rc) and modulus of resilience (Ec). Further, test roads were paved along an expressway in China to demonstrate the feasibility of the highly weathered phyllite improvement technology. Results show that unweathered phyllite can be used as subgrade filler. In spite of increasing compactness, phyllite with a higher degree of weathering cannot meet the requirements for subgrade filler. With increasing cement content, Rc and Ec of the improved phyllite increases linearly. Rc and Ec increase by at least 15% and 17%, respectively, for every 1% increase in cement content and by at least 10% and 6%, respectively, for every 1% increase in compactness. The higher the degree of weathering of phyllite, the greater the degree of improvement of its mechanical properties.

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Section: Introductionmentioning

confidence: 99%