JPH04120371A - Concrete form fitted with ultrasonic vibrator - Google Patents

Abstract

PURPOSE:To enhance the quality of a placed concrete by fixing an ultrasonic vibrator to the rear of a concrete form made of steel, and thereto applying ultrasonic vibration during concrete placing operation. CONSTITUTION:A concrete form 1 is made from frame boards 2 made of steel, and to its rear 3 a holddown bolt 4 is implanted. A holddown hole 6 in an ultrasonic vibrator 5 is screwed fast on this holddown bolt 4, connected to an ultrasonic signal transmitter 8 through cables 7, and coupled with a power plug 10. Via the frame board 2 high frequency vibration from this ultrasonic vibrator 5 is applied while the concrete C is placed into the form 1. Thereby surplus water and/or included air in the concrete is exhausted to prevent generation of crazing and/or cracks, and thus the quality of concrete surface can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a concrete formwork equipped with an ultrasonic vibrator for all types of concrete casting.

[Prior art]

Conventionally, a rod-shaped vibrator-1 high-frequency pie breaker and the like have been used as a compaction method for placing high-quality concrete, but the range of action is narrow and the effect is low. In addition, as in the case of bar-shaped pie breaks, it is difficult work in a narrow work environment, and satisfactory results cannot be obtained.Concrete has a high rate of avatar occurrence, and concrete is placed which is disadvantageous to deterioration due to the problem of filling degree. The current situation is that

[Problem to be solved by the invention]

The present invention has been developed in view of the above-mentioned problems, and there has been a demand for an extremely high-quality concrete pouring system with fine vibration amplitude, which eliminates the arduous work in a narrow working environment.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention has an ultrasonic vibrator (generator) fixed to the back surface of a steel template of a concrete formwork.

[Effect]

When the concrete formwork is placed and concrete is being poured, an ultrasonic frequency voltage is applied to the ultrasonic vibrator fixed to the back side of the steel frame plate of the formwork through the amplifier of the ultrasonic generator. The sonic vibrator vibrates at an extremely high frequency and minute amplitude, and transmits minute vibrations at the ultrasonic frequency to a steel template fixed to the back side of the ultrasonic vibrator. The steel template vibrates minutely at a high frequency, which vibrates the concrete filled in contact with the surface of the steel template, promoting a chemical reaction between the water in the concrete and the cement, and removing excess water. Discharge. Furthermore, this vibration also causes the air contained in the concrete to be expelled, preventing avatars from forming.

〔Example〕

Embodiments of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 2, the concrete formwork 1 with the ultrasonic transducer attached has mounting bolts 4 planted in the back surface 3 of the template 2, and mounting screw holes 6 for the ultrasonic transducer 5. is firmly screwed onto this mounting bolt 4, and the ultrasonic transmitter 8 is connected by the wire 7.
This ultrasonic transmitter 8 is connected to the ACI by a wire 9.
It is connected to a plug 10 of an ooV or 200V outlet. In the figure, C indicates concrete.

〔effect〕

Since the present invention has the above-described configuration, the following effects are achieved.

■Minute ultrasonic frequency vibrations are applied to the concrete during pouring via the template, which removes excess moisture and mixed air, improving the quality of the concrete surface and preventing the occurrence of cracks, cracks, and burrs. In turn, this prevents concrete from deteriorating.

■It applies ultrasonic vibrations, which promotes the chemical reaction between the cement and water in concrete, speeding up hardening.

■Since the concrete surface is poured densely, it prevents damage from acid rain, etc.

■ Surplus water that does not react chemically is called out by ultrasonic waves,
Water is milled and dispersed, compacting the concrete surface and at the same time eliminating water and air avatars on the surface.

■The device is extremely simple and low cost.

[Brief explanation of the drawing]

FIG. 1 is an enlarged partial cross-sectional front view of the mounting portion of the ultrasonic transducer of the present invention, and FIG. 2 is a front view of the entire ultrasonic ordering device. [Explanation of symbols of main parts] 1: Concrete formwork 2: Template 3: Back side 4: Mounting bolt 5: Ultrasonic vibrator 6: Mounting screw hole 8: Ultrasonic transmitter
10 Nibrag C: Concrete Diagram

Claims (1)

[Claims] A concrete formwork equipped with an ultrasonic vibrator, characterized in that an ultrasonic vibrator is attached to the back side of a steel template of the concrete formwork.