Apparatus for producing rapid-hardening concrete by intermixing and dissipating air in normal concrete and adding early-strength admixture thereto, and method for producing same
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United States of America Patent
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Feb 19, 2019
Grant Date -
Nov 17, 2016
app pub date -
Dec 8, 2014
filing date -
Dec 10, 2013
priority date (Note) -
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Abstract
The present invention relates to an apparatus for producing rapid-hardening concrete and a method for producing same, the rapid-hardening concrete being produced by intermixing and dissipating air in normal concrete and adding an early-strength admixture thereto. With respect to forming rapid-hardening concrete, mixed concrete is formed by mixing in a large volume of air bubbles to be discarded, along with an early-strength admixture, to already mixed normal concrete, the early-strength admixture getting evenly dispersed therewithin by means of the ball bearing effect of the air bubbles, and when the mixed concrete is discharged, a rapid-hardening concrete is shotcreted while excess air contained in the mixed concrete is dissipated by means of high-performance air, the slump which was raised due to the large amount of air bubbles having been reduced to the slump range for normal concrete.
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