JP2000258316A - Collecting container for test piece for concrete compression test - Google Patents

Abstract

PROBLEM TO BE SOLVED: To collect a test piece as uncompressed mortar and a test piece as swollen mortar by a method wherein a lid in which a small drainage and ventilation hole is bored and formed, and a container in which parallel separation grooves and separation tabs are arranged are bonded by grip hinges and bored fixation tabs. SOLUTION: A lid 1 and a container 2 are formed by the mold injection molding operation of a synthetic resin. A rib 6 for reinforcement is installed on the surface of the lid 1. Small drainage and ventilation holes 3 are bored and formed in the lid 1. Grip hinges 5 are arranged and installed in the outer circumferential part of the lid 1. Fixation tabs 8 are arranged and installed in the outer circumference of the opening part of the container 2. In addition, parallel separation grooves 9 and bored separation tabs 7 by which a test piece is separated easily are arranged on the outer face of the container 2. Then, when the test piece is collected, mortar is poured into the container 2, the grip hinges 5 and the fixation tabs 8 are engaged, and the lid 1 and the container 2 are bonded so as to be installed in a place which is parallel to the ground and which is solid. At this time, the small drainage and ventilation holes 3 for freezing-water discharge prevent the formation of a foamed weak-strength layer which is formed in the upper part of the test piece. In addition, the lid 1 can endure a swelling force when the mortar is hardened because the grip hinges 5 are bonded to the fixation tabs 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a container and a lid used for collecting a specimen for a concrete strength test.

[0002]

2. Description of the Related Art Conventionally, a metal collecting formwork specified by JIS standards, a container formed by processing a metal plate such as a tin plate into a bottomed cylindrical shape, a plastic container described in Japanese Patent Application Laid-Open No. 9-145570, and Specimens were collected in similar containers.

[0003]

SUMMARY OF THE INVENTION In a metal sampling form,
Since the mortar is in a highly sealed state to restrain expansion during curing, breathing water generated during curing is retained at the upper part of the specimen, it is easy to form a foamed weak strength layer after curing, and the temperature difference in summer and winter is remarkable Sometimes, the heat of the container itself has an adverse effect on the curing of the mortar, which may lead to a decrease in the strength of the specimen. In addition, heavy transport requires labor, and wear and rust also become a major problem. Cleaning and maintenance are indispensable after use, and if complicated management is performed, inconsistencies may occur due to misplacement of individual parts. However, it takes a lot of effort to maintain each screwed part, such as taking time to disassemble the specimen.

A container made of a thin metal plate such as a tin plate is disposable and does not require maintenance because it is disposable, so there is no trouble in handling due to excessive weight. However, since the container is thin and easily deformed, the mortar that has been driven is evenly distributed in the container. It cannot be hit with a mallet or the like in order to make it fall, and it is necessary to pay attention to the collapse deformation caused by the fall of the container.

The plastic container and similar containers disclosed in Japanese Patent Application Laid-Open No. 9-145570 are disposable, resistant to impact, and easy to separate the specimen. However, since they have no lid structure, mortar spills from the opening if care is not taken for curing. Mortar, deformation and hardening of the mortar, etc., and the structure can only cope with the preparation of a non-shrink mortar specimen, which is largely inconvenient.

According to the present invention, both specimens can be sampled without expansion and contraction, the specimens can be collected, there is no spill due to the lid structure, the breathing water and the heat of the container itself do not affect the specimens, they are disposable, light and easy to disassemble. The purpose of the present invention is to provide a sample collection container that is very easy to maintain without rust.

[0007]

A closed cylindrical member having an opening on the upper surface and provided with reinforcing ribs 6 and 10 on a lid and a bottom to facilitate separation of a specimen in a vertical direction on the outer surface of the cylindrical portion. A plurality of separating tabs 7 and a pair of separating tabs 7 to be disposed, a drainage vent small hole 3 is drilled in the restraining lid 1, and the lid 1 and the container 2 are joined together with a plurality of grip hinges 5 and drilling fixing tabs 8.
Specimens of both non-shrinking and expanding mortars can be collected.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a container for collecting a specimen for a concrete compression test according to the present invention. FIG. 1 is a perspective view of a lid and a container made of synthetic resin, which are formed by injection molding. Lid 1 and container 2
Has a thickness of 1.5 mm, the lower surface of the lid 1 has a planar configuration, and the outer peripheral portion has a diameter of 49.8 mm and a reinforcing rib 6 having a thickness of 1.5 mm on the upper surface.
One 1.0 mm drainage vent hole 3 having a diameter of 1.0 mm is formed in the inner diameter of the reinforcing rib 6, and two holes are formed vertically and two diagonally in the diagonal direction. 100
A 3.5 mm lip 11 is provided at the opening of the container and the fixing tab 8 is arranged there. Four grip hinges 5 and four fixing tabs 8 are arranged on the outer periphery of the lid 1 and at the same diagonal of the outer periphery of the opening of the container 2, each having a thickness of 0.3 m inside the parallel separation groove 9.
A perforated separating tab 7 having a hole of 7 mm is arranged on the circumference of an upper part having a width of 10 mm and a width of 10 mm. FIG. 3 is a bottom view of the container.
Two reinforcing ribs 10 having a thickness of 48 mm and a diameter of 48 mm and 25 mm were connected by four ribs. The lid 1 and the container 2 are joined by the grip hinge 5 provided on the lid 1 and the fixing tab 8 of the container 2. During transportation, the reinforcing ribs 6 serve as fasteners, and the lid 1 can be turned upside down and combined with the container 2 to carry around without joining. Therefore, the outer peripheral diameter of the reinforcing rib 6 is slightly shorter than the inner diameter of the container 50 mm, and is set to a degree that can be fixed.

At the time of specimen collection, mortar is poured into the container 2, and then the grip hinge 5 and the fixing tab 8 are engaged with each other, the lid 1 and the container 2 are joined, and the mortar is placed in a rigid place parallel to the ground. The non-shrink mortar and the expanded mortar are sampled in the same procedure. (With regard to the method for collecting the specimen, the non-shrink mortar conforms to JIS A 1180 “Test method for compressive strength of concrete”, and the expanded mortar conforms to the Japan Society of Civil Engineers standard “Test method for compressive strength of injected mortar of prepacked concrete.”)

A small drainage hole 3 for discharging breathing water is formed in the lid 1 to prevent the formation of a foamed weak-strength layer formed by the breathing water above the specimen. Note that the drainage vent hole 8 has an appropriate size so that the mortar does not flow out. The lid 1 withstands the pull-out prevention grip hinge 5 with the fixing tab 8 of the container 2 to withstand the expansion force at the time of mortar hardening, the reinforcing rib 6 of the lid 1 and the reinforcing rib for maintaining the horizontal surface on the lower surface of the container in FIG. By providing 10, the upper and lower surfaces of the cylindrical specimen are kept parallel. These two mechanisms can be used for both non-shrinking and expanding mortar, and prevent the formation of a weak strength layer.

The cured specimen is separated from the collection container for the compression test. At this time, the container is supported with the lid 1 up, and a metal rod or the like is inserted into the hole of the perforated separation tab 7.
Contact the outer surface of the container. Using the lever principle, the fulcrum is placed on the contact surface between the rod and the container, and the perforated separation tab 7 is peeled outward. Grab the detached separation tab and peel it downward.
After removing the lid 1, the container is separated by pushing open. The parallel separation groove 9 is provided vertically from the lower surface of the container 2 to the perforated separation tab 7, and a simple separation is constituted by one set of the parallel separation groove 9 and the separation tab 7 in one structure.
Providing another identical structure is considered to be the configuration that achieves the best separability. (For hardening and polishing, non-shrink mortar conforms to JIS A 1180 “Method of testing compressive strength of concrete”, and expanded mortar conforms to the standards of the Japan Society of Civil Engineers “Method of testing compressive strength of injected mortar of prepacked concrete.”)

[0010]

As described above, the collecting container for the concrete compression test according to the present invention solves the problems of the conventional collecting container by providing the drainage vent 3 on the lid 1 and has a grip hinge. The lid 1 has one structure, the parallel separation groove 9 and the perforation separation tab 7 are provided, and the disposable structure is mass-produced by injection molding of a synthetic resin in a disposable structure. Mortar and test specimens of both non-shrinking and expanding mortars.

[Brief description of the drawings]

FIG. 1 is a perspective view of a sampling container made of synthetic resin according to the present invention.

FIG. 2 is a plan view of a top surface of a lid.

FIG. 3 is a plan view of a lower surface of the lid.

FIG. 4 is a plan view of the upper surface of the container.

FIG. 5 is a plan view of the lower surface of the container.

FIG. 6 is a perspective view of a grip hinge.

FIG. 7 is a top view of a separation perforation tab.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lid 2 Container 3 Drainage ventilation small hole 4 Grip hinge attachment part 5 Grip hinge 6 Reinforcement rib 7 Perforation separation tab 8 Fixing tab 9 Parallel separation groove 10 Reinforcement rib 11 Lip

Claims (1)

[Claims] 1. A closed cylindrical member having an opening on an upper surface, provided with reinforcing ribs (6, 10) on a lid portion and a bottom portion, and a parallel member for facilitating sample separation in a vertical direction on an outer surface of the cylindrical portion. A plurality of separation grooves (9) and a pair of perforated separation tabs (7) are arranged, a small drainage vent (3) is formed in the restraining lid (1), a plurality of grip hinges (5) and fixing tabs (8). A specimen collection container for a concrete compression test in which a lid and a container are joined together.