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Title |
Tensile Behavior of Highly Ductile Cementitious Composites Using Normal Sand as Fine Aggregate
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Authors |
이방연(Bang Yeon Lee) ; 강수태(Su-Tae Kang) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.6.178 |
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Keywords |
고연성 시멘트 복합체 ; 잔골재 ; 유동성 ; 일축인장거동 ; 인장변형률 성능 Highly ductile cementitious composite ; Fine aggregate ; Flowability ; Uniaxial tensile behavior ; Tensile strain capacity |
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Abstract |
This study was aimed to investigate the tensile behaviors of PE(Polyethylene) fiber-reinforced highly ductile cementitious composites with different combinations of micro silica sand and normal sand(river sand) with maximum particle size of 4.75 mm. Flow test result indicated the increase of flowability with higher replacement ratio of river sand. There was no noticeable difference in the mean compressive strength with different replacement ratio of river sand, but the variation in the compressive strength increased as higher amount of river sand was adopted for the replacement. The difference in the uniaxial tensile strength was negligible, but the tensile strain capacity was significantly influenced by the replacement ratio of river sand. It is thought that increased density of multiple cracks induced improved tensile strain capacity when higher percentage of river sand was adopted for fine aggregate. The deviation in the strain capacity increased as the replacement ratio of river sand was higher, as in the compressive strength. This study presented the feasibility of using normal sand instead of micro silica sand for highly ductile cementitious composites with equivalent or better uniaxial tensile performance, even though it might increase the deviation in the performance.
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