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Title |
Absorption Properties of Coarse Aggregate according to Pressurization for Development of High Fluidity Concrete under High Pressure Pumping
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DOI |
http://dx.doi.org/10.11112/jksmi.2016.20.3.122 |
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Keywords |
고압송 ; 고유동콘크리트 ; 가압 ; 굵은골재 ; 흡수 High Pressure Pumping ; High Fluidity Concrete ; Pressurization ; Coarse Aggregate ; Absorption |
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Abstract |
In this study, we developed a pressing device which can reproduce the pressure of concrete inside the conveying pipe as a part of the basic study to development of high fluidity concrete under high pressure pumping. Using this pressing device, we evaluated a absorption properties of aggregate that are crushed coarse aggregate, river gravel and lightweight coarse aggregate according to pressure of coarse aggregate and aggregate inside a high fluidity concrete, focused on the reduction of unit water quantity by pressure. In addition, it was evaluated the compressive strength of high fluidity concrete about before and after of pressive. Test a result, case of condition under the high pressure of 250 bar, absorption ratio of crushed coarse aggregate and river gravel were not increased above the surface absorption, absorption ratio of lightweight coarse aggregate was increased than the surface absorption.
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