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<doi>/ISEC.res.2017.105</doi>
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<article-title>EXPERIMENTAL STUDY ON CONCRETE<br/>
PERMEABILITY AFFECTED BY<br/>
ENVIRONMENTAL VIBRATION
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<author>XUE-FENG MA<sup>1</sup> and JIAN-QING BU2<sup>2</sup></author>

<aff><sup>1</sup>Yunnan Construction Investment Holding Group Co. Ltd, Kunming, China<br/>
<sup>2</sup>School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang, China</aff>

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<title>ABSTRACT</title>
<p>This study investigates the effect of environmental vibrations on concrete permeability.
Based on published field measurement data and relevant references, two different sinusoidal
vibration parameters (5 Hz/4 mm and 20 Hz/2 mm) are selected and applied to a newly
constructed concrete by a vertical vibrating table and AC impedance technique. The
concrete permeability is examined, and the influence of some factors including different
vibration time (before initial curdle, between initial curdle and finial curdle, and after final
curdle) and different vibration energy are discussed. From the experimental results, the
following conclusions can be drawn. Irrespective of whether or not the concrete is vibrated,
the uniformity inside the concrete along the direction of concrete pouring is more discrete in
the upper and lower part of the concrete. Furthermore, the permeability at both ends of the
concrete is larger than that in the middle portion. The newly constructed concrete's
permeability is increased when the vibration energy is lowered, and decreased when the
vibration energy is increased, and the new constructed concrete permeability affected by
environment vibration obviously before initial curdle time.</p>
<p><italic>Keywords: </italic>Newly constructed concrete, AC impedance technique.</p>
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