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

摘要

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.

主权项

1. An apparatus for producing a rapid-hardening concrete by intermixing and dissipating air in a normal concrete and adding an early-strength admixture thereto, the apparatus comprising:
a normal concrete forming unit configured to mix water, cement and aggregate at a predetermined ratio to form a normal concrete; an air bubble and early-strength admixture putting unit configured to put air bubbles and an early-strength admixture into the normal concrete to increase a slump of the normal concrete; a mixed concrete forming unit configured to mix the normal concrete with the air bubbles and the early-strength admixture put into the normal concrete to form a mixed concrete by rotating a shaft formed in a concrete mixer truck and a mixing member protruding on the shaft by means of a power of a motor; and a rapid-hardening concrete shooting unit configured to shoot a rapid-hardening concrete whose slump increased due to the air bubbles is reduced to a slump range of the normal concrete, while dissipating air bubbles included in the mixed concrete by blowing a high-pressure air of 5 atmospheres or above, when the mixed concrete is discharged.