Apparatus for manufacturing fiber-reinforced concrete through shooting after inserting bubbles into normal concrete and method for manufacturing same

An apparatus for manufacturing a fiber-reinforced concrete through shooting after inserting bubbles into a normal concrete, the apparatus comprising:

• a fiber-mixed concrete forming unit configured to form a fiber-mixed concrete by mixing bubbles, fiber-mixed material and silica fume into a normal concrete prepared by mixing water, cement, and aggregates at a predetermined ratio or by putting and mixing aggregates, water and bubbles into a mixture in which cement, fiber-mixed material and silica fume are mixed;
• a concrete shooting unit configured to shoot a fiber-reinforced concrete whose slump is decreased to a slump range of the normal concrete, while dissipating bubbles included in the fiber-mixed concrete by blowing a high-pressure air of 5 atmospheres or above, when the fiber-mixed concrete mixed at the fiber-mixed concrete forming unit is discharged,
• wherein the concrete shooting unit comprising
• a shooting guide member detachably mounted to the fiber-mixed concrete forming unit to compress and discharge a fiber-mixed concrete;
• and
• an air supply hole formed through an outer circumference of the shooting guide member to dissipate bubbles included in the fiber-mixed concrete and reduce an air volume by means of a high-pressure air of 5 atmospheres or above supplied therethrough,
• wherein the air supply hole is formed with a slope in a radial direction at the outer circumference of the shooting guide member,
• wherein the fiber-mixed concrete forming unit comprising:
• an external body that accommodates the normal concrete together with the bubbles, the fiber-mixed material and the silica fume;
• a shaft formed in the external body to rotate by a motor;
• and
• a mixing member formed at the shaft to have at least one stage in a radial direction to mix the normal concrete with the bubbles, the fiber-mixed material and the silica fume.