KR101669616B1

KR101669616B1 - Carbonation Depth Measurement Device for Safety Diagnosis of Reinforced Concrete Structure Using Core Test Piece

Info

Publication number: KR101669616B1
Application number: KR1020160120607A
Authority: KR
Inventors: 성낙전
Original assignee: 주식회사 홍익기술단
Priority date: 2016-09-21
Filing date: 2016-09-21
Publication date: 2016-10-27

Abstract

The present invention relates to a device to measure a carbonation depth to diagnose safety of a ferroconcrete structure using a core test piece capable of facilitating a cleaning work of a core test piece collected from the ferroconcrete structure. The device comprises: a pair of horizontal channels (30, 32) installed horizontally in an axial direction of a core test piece (20) at a distance from each other; leg units (30a, 30b, 32a, 32b) which are downwardly bent towards a floor (22) from an outer side of the horizontal channels (30, 32); footholds (34, 36) installed in a lower part of the leg units (30a, 30b, 32a, 32b) and supported on the floor (22); fixing brackets (40, 42) installed in an upper part of the horizontal channels (30, 32) at a distance from each other; radial support rollers (43, 44, 45, 46) installed in the fixing brackets (40, 42), supporting the core test piece (20); a plurality of horizontal links (51, 52, 53, 54) installed inside the horizontal channels (30, 32); an elevation bracket (50) installed on top of the horizontal links (51, 52, 53, 54); axial guide rollers (55, 56, 57) installed in an elevation bracket (50), guiding the core test piece (20) in the axial direction; and a lever (58) installed in the elevation bracket (50).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbonation depth measurement device for a safety inspection of a reinforced concrete structure using a core specimen,

The present invention relates to a technology used for measuring the depth of carbonation (neutralization) of a reinforced concrete structure, and more particularly to a technique for measuring the depth of carbonation (neutralization) of a reinforced concrete structure using a core specimen to facilitate cleaning of a core specimen collected from a concrete structure And a carbonation depth measuring apparatus for safety diagnosis.

Concrete absorbs carbon dioxide in the air from the surface, and when the calcium hydroxide in the concrete changes into calcium carbonate, it loses its alkalinity. Such phenomenon is called carbonation or neutralization, and when the passive film wrapping the surface of the reinforcing steel is destroyed by the carbonation of concrete, The corrosion of concrete starts and the life of concrete is shortened.

The mechanism of carbonation of concrete is as follows: Carbon dioxide penetration → carbonation (neutralization) → rebar passive film breakage → rebar corrosion → rebar volumetric expansion → concrete cracking in the order of concrete. Ca (OH) 2 (calcium hydroxide) + CO2 = CaCO3 (calcium carbonate) + H2O.

Before the progress of carbonation, the calcium hydroxide originally has a pH value of about 12 to 13, and a portion of calcium hydroxide that has been changed to calcium carbonate due to the carbonation phenomenon is lowered to about 8.5 to 10 to be neutralized.

If the pH inside the concrete is 11 or higher, it does not rust if oxygen is present. However, when the pH is lower than 11, rust is generated in the reinforcing bar and the reinforcing bar is expanded to about 2.5 times the original volume.

As a method of checking the carbonation of concrete, when the 1% solution of phenolphthalein as the test reagent meets and reacts with the alkaline substance, it changes into red color, and the phenolphthalein solution is sprayed on the concrete to visually observe the change of color .

When 1% solution of phenolphthalein is sprayed on concrete, it is colorless at pH 9 or lower, and red at higher pH value, so it can be very easily identified. This method can be used to collect specimens from concrete structures in core form or powder form A hole is drilled in the concrete structure and it is directly inspected in the field.

When the depth of carbonation is measured using the core specimen as described above, the core drill 14 and the diamond core bit 15 provided on the wall surface 11 are used to measure the carbonation depth of the concrete structure 10 When the core drill 14 and the diamond core bit 15 are separated from the wall surface 11 after the core hole is drilled, the core specimen 13 remains as shown in FIG. 2, The core specimen 13 is pulled out from the core hole 12 as shown in Fig. 3, after cracking is generated in the vicinity of the root of the core specimen 13 by using the iron core 16 to separate the core specimen 13 from the core hole.

When the core specimen 13 is sprayed on the bottom surface of the core specimen 13 by spraying with water while spraying a 1% solution of phenolphthalein as a test reagent on the surface of the core specimen 13, Where the red color reaction length is measured, it is possible to know the depth of carbonation.

That is, the depth from the end of the core specimen 13 corresponding to the wall surface 11 to the boundary portion between the red color reaction and the colorless reaction corresponds to the carbonation depth.

However, there is a problem that the core specimen 13 is contaminated by the foreign substances on the floor because the core specimen 13 is washed while being rolled on the floor when the core specimen 13 is cleaned. In this case, There is a problem that the reliability is lowered by the measurement.

In addition, since the core specimen 13 is rolled from the bottom when cleaning the core specimen 13, the core specimen 13 is not left in its original position and is rolled up to secure a large washing space. There is a problem of being contaminated.

Korean Patent Registration No. 10-1578756 Korean Patent Registration No. 10-0686495 Korean Patent Registration No. 10-0564102

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems as described above, and it is an object of the present invention to prevent contamination of the core specimen from foreign substances on the floor during washing, to facilitate the cleaning work of the core specimen, And to provide a device for measuring the depth of carbonation for safety diagnosis of a reinforced concrete structure using a core specimen which can prevent floor contamination and greatly reduce a washing space.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided an apparatus for measuring depth of carbonation for safety diagnosis of a reinforced concrete structure using a core specimen, comprising: a pair of horizontal channels spaced apart from each other and installed parallel to an axial direction of the core specimen; A leg portion bent downward from the outer side surface of the horizontal channel toward the floor; A footrest provided at the lower end of the leg portion and supported on the floor; A fixing bracket installed at an upper portion of the horizontal channel at a distance from each other; A radial supporting roller installed in the fixing bracket and supporting the core specimen; A plurality of parallel links installed inside the horizontal channel; A lifting bracket installed at an upper end of the parallel link; An axial guide roller installed in the lifting bracket and guiding the core specimen in the axial direction; And a lever provided on the lifting bracket.

The present invention relates to an image forming apparatus, A hollow boss provided on the holding plate; A latching hole formed in the parallel link; And a locking pin inserted into the latching hole through the hollow boss to hold the lifting position of the lifting bracket.

The present invention relates to an arm extending upward from a lower portion of a fixing bracket and spaced from an end of a core specimen; A vertical slot formed in the arm; A slider inserted into the vertical ball and slidable in the vertical direction; A bolt engaging portion formed at one end of the slider; A nut coupled with the bolt engagement portion; A spherical coupling formed at the other end of the slider; A ball joint which is fitted in the spherical coupling portion and is spherically engaged with each other; And a rotating disk provided on the ball joint and supporting an end portion of the core specimen.

A pair of hanger bars installed parallel to each other on a leg portion; A water receiver for receiving wash water falling from the core specimen; And a V-bending portion formed parallel to both edges of the water receiver and hooked to the hanger bar.

The present invention as described above can be applied to the core specimen 20 by the use of the axial guide rollers 55, 56 and 57 at the positions where the radial support rollers 43, 44, 45 and 46 are located And it is possible to facilitate the work of lowering it to the floor 22 or the like.

The core specimen 20 can be cleaned while being smoothly rotated by the radial supporting rollers 43, 44, 45 and 46 when the core specimen 20 is washed using the washing water W1, It is possible to work safely and conveniently since a large force is not required in the washing operation of the washing machine 20.

It is possible to rotate the core specimen 20 while rotating the core specimen 20 by the radial support rollers 43, 44, 45 and 46 without having to roll the core specimen 20 on the bottom 22, There is an effect that can be reduced.

So that the core specimen 20 can be brought into contact with only one of the radial supporting rollers 43, 44, 45, 46 or the axial guide rollers 55, 56, 57 by the lifting bracket 50 It is possible to prevent interference by the axial guide rollers 55, 56 and 57 while the core specimen 20 is being rotated and to prevent the interference of the core specimen 20 with the radial support rollers 55, (43), (44), (45) and (46) can be prevented.

When the lifting bracket 50 is lifted up, the holes formed in the engaging plates 71 and 73 and the hollow bosses 72 and 74 and the engaging holes 51b and 52c formed in the bumps 51g and 52g of the parallel links 51 and 52, It is possible to prevent the lifting and lowering bracket 50 from being lowered naturally by its own weight by the locking pin 70 inserted into the lifting brackets 51h and 52h.

The center of gravity of the axial guide rollers 55, 56 and 57 is biased to one side with respect to the vertical line V1 in accordance with the ascending or descending position of the lifting bracket 50, It is possible to prevent the lifting and lowering bracket 50 from falling naturally even if it is separated from the holes formed in the engaging plates 71 and 73 and the hollow bosses 72 and 74 and the engaging holes 51h and 52h, The operation of removing the pin 70 and the operation of raising and lowering the lift bracket 50 can be facilitated.

The positioning of the core specimen 20 in the axial direction when the core specimen 20 is transferred in the axial direction can not be performed because the rotary disc 87 contacting the fracture end face 24 of the core specimen 20 is provided on the arm 80 And the rotation disc 87 is rotated together with the core specimen 20 when the core specimen 20 is rotated so that the rotation of the core specimen 20 can be smooth.

Since the bolt engaging portion 83 moving in the vertical direction along the vertical slot 81 is engaged with the nut 84, the center of the rotating disk 87 can be aligned with the center of the core specimen 20.

Since the rotating disk 87 can freely move by the spherical engaging part 85 and the ball joint 86 when the fracture end face 24 of the core specimen 20 is brought into contact with the rotating disk 87, Is automatically brought into surface contact with the slope of the fracture end face 24.

It is possible to clean the core specimen 20 by the water receptacle 90 located under the horizontal channels 30 and 32 and to collect the washing water W1 falling downward, ) Can be prevented from being contaminated.

The water receptacle 90 is attached to the hanger bar 91 by using the hanger bars 91 and 92 provided on the leg portions 30a and 30b and 32a and 32b and the V bending portions 93 and 94 formed on the water receptacle 90, (91) (92), it is possible to facilitate the operation of emptying or cleaning the water tray (90).

Furthermore, according to the present invention, when the lever 58 is operated while the footrests 34 and 36 provided at the lower ends of the legs 30a, 30b, 32a and 32b are stepped on, 36 can be prevented from moving from the floor 22.

Since the lever 58 that can be held and operated by the hand is provided, the work for raising and lowering the lifting bracket 50 can be made more convenient.

FIG. 1 is a cross-sectional view showing a drilling operation using a core drill to collect a core specimen from a conventional concrete structure
FIG. 2 is a cross-sectional view schematically showing a process of breaking a conventional core specimen using a crutch;
Figure 3 is a cross-sectional view showing the separation of a core specimen from a conventional concrete structure;
Fig. 4 is an exploded perspective view
5 is an exploded perspective view showing a lifting bracket, a parallel link, and an axial guide roller according to the present invention.
FIG. 6 is a perspective view showing the fixing bracket according to the present invention installed on the upper surface of the horizontal channel.
Fig. 7 is a bottom perspective view of Fig.
FIG. 8 is a perspective view showing a fixing bracket and a radial supporting roller according to the present invention,
9 is an exploded perspective view showing the spherical coupling portion and the nut separated from the arm according to the present invention.
10 is a side sectional view showing that the lifting bracket according to the present invention is lowered so that the core specimen is separated from the axial guide roller,
11 is a sectional view taken on line A-A 'in Fig. 10
12 is a perspective view of Fig. 10,
FIG. 13 is a side sectional view showing that the lifting bracket according to the present invention is lifted so that the core specimen is held in contact with the axial guide roller and separated from the radial support roller;
FIG. 14 is a cross-sectional view taken along line B-B '
Fig. 15 is a perspective view of Fig. 13,
Fig. 16 is a rear perspective view of Fig.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 4 to 16, the present invention comprises a pair of horizontal channels 30 and 32 installed parallel to the axial direction of the core specimen 20 at a distance from each other; Legs 30a, 30b, 32a, and 32b that are bent downward from the outer side surfaces of the horizontal channels 30 and 32 toward the floor 22, respectively; And foot plates 34 and 36 provided at the lower ends of the leg portions 30a, 30b, 32a and 32b and supported by the floor 22.

4 and 6, the horizontal channels 30 and 32 can be formed by cutting a channel having a shape of a " C " The rectangular sections 30a, 30b, 32a and 32b can be formed by welding rectangular tubes bent at an obtuse angle to the side surfaces of the horizontal channels 30 and 32 so as to be laterally symmetrical. ) 36 can cut a strip steel plate having a constant thickness into a rectangular shape and weld it to the lower end portions of the leg portions 30a, 30b, 32a, 32b.

The present invention is characterized in that the fixing brackets 40 and 42 are installed at a distance from each other on the upper part of the horizontal channels 30 and 32; Radial support rollers 43, 44, 45, and 46 provided on the fixing brackets 40 and 42 to support the core specimen 20; A plurality of parallel links 51, 52, 53, 54 installed inside the horizontal channels 30, 32; A lifting bracket 50 installed at the upper end of the parallel links 51, 52, 53, 54; Axial guide rollers 55, 56 and 57 provided on the lifting bracket 50 for guiding the core specimen 20 in the axial direction; And a lever 58 installed on the lifting bracket 50.

As shown in Figs. 6 and 7, the fixing brackets 40 and 42 are provided on the rear plates 40e and 40f, respectively, from the opposite edges of the bottom plates 40f and 42f, 40g) 40h and the front vertical plates 42e, 42f, 42g, 42h may be bent in parallel with each other.

The rear vertical plates 40e, 40f, 40g and 40h and the front vertical plates 42e, 42f, 42g and 42h are provided with rear holes 40a, 40b and 40c And 40d and the front holes 42a, 42b, 42c and 42d and the radial supporting rollers 43, 44, 45 and 46 to the rear vertical plates 40e and 40f 40g and 40h and the front vertical plates 42e, 42f, 42g and 42h and then the rear holes 40a, 40b, 40c and 40d and the front holes 42a and 42b 42c and 42d are aligned with the radial roller holes 43h and 44h formed at the centers of the radial supporting rollers 43 and 44 and 45 and 46 and radial pins 43p and 44p ) 45p and 46p to the radial roller holes 43h and 44h through the rear holes 40a 40b 40c and 40d and the front holes 42a 42b 42c and 42d 44, 45, and 46 to the fixing brackets 40 and 42 by inserting the radial supporting rollers 43, 44, 45,

When the radial pins 43p, 44p, 45p, 46p are assembled to the fixing brackets 40, 42, the radial pins 43p, 44p, 45p, 43p, 44p, 45p, 46p can be prevented from separating from the radial supporting rollers 43, 44, 45, 46 when they are adhered or press- .

Roller bearings and oil-less bearings are embedded in the center of the radial support rollers 43, 44, 45 and 46, so that a smoother rotation can be obtained.

The lifting and lowering bracket 50 is constructed so that the supporting plates 55c, 55d, 56c, 56d, 57c, 57d are arranged parallel to each other from both edges of the bottom plate 50f as shown in Fig. 5 And the side plates 55a, 55b, 56a, 56b, 57a, 57b may be formed in the support plates 55c, 55d, 56c, 56d, 57c, .

The axial guide rollers 55, 56 and 57 are fixed to the support plates 55c, 55d, 56c and 56d in order to assemble the axial guide rollers 55, 56 and 57 to the lifting bracket 50, 56b and 57a and 57b and the center of the axial roller holes 55h, 56h and 57h are made to coincide with each other The following axial direction pins 55p, 56p, 57p are inserted into the side holes 55a, 55b, 56a, 56b, 57a, 57b and the axial roller holes 55h, 56h, And assembled.

When the axial direction guide rollers 55, 56 and 57 are assembled to the lifting bracket 50, the axial pins 55p, 56p and 57p are engaged with the axial roller holes 55h, 56h and 57h, The axial fins 55p, 56p and 57p can be prevented from being separated from the axial guide rollers 55, 56 and 57. In this way,

Roller bearings and oil-less bearings are incorporated in the center of the axial guide rollers 55, 56 and 57 to achieve a more smooth rotation.

As shown in Figs. 4 to 7, the left side holes 30e, 30f, 30g and 30h and the right side holes 32e, 32f, 32g and 32h are formed on the side surfaces of the horizontal channels 30 and 32, ) Are punched so as to coincide with each other.

The parallel links 51, 52, 53 and 54 may be integrally connected in pairs by pairs of claw rods 59a and 59b as shown in FIG. 5, for example, 51a, 51b, 52a, 52b, 53a, 53b, 54a and 54b are formed at the upper and lower portions of the guide grooves 51, 52, 53 and 54, The center of the link holes 51b, 52b, 53b and 54b formed in the lower portion is inserted into the left holes 30e, 30f, 30g and 30h formed in the horizontal channels 30 and 32 and the right hole 32e, The rotation center shaft 31 and the right and left holes 32e and 32f are aligned with the centers of the left and right holes 32f and 32g and 32h, 52, 53, and 54 are inserted into the horizontal channels 30 and 32 by inserting them into the lower link holes 51b, 52b, 53b, and 54b, do.

Thus, when the rotary center shaft 31 (33) is assembled to the horizontal channels 30 and 32 and the parallel links 51, 52, 53 and 54, the ends are pressed and deformed or welded, prevent.

The upper portions of the parallel links 51, 52, 53 and 54 are engaged with the axial fins 55p, 56p and 57p through the side holes 55a, 55b, 56a, 56b and 57a 56d (57c, 57d) formed in the lift bracket 50 before being inserted into the guide pins 57a, 57b, 57b, 57p to the lifting and lowering bracket 50.

52b are integrally formed on one side of the parallel links 51, 52, 53 and 54 and the engaging holes 51h and 52h are formed in the folds 51g and 52g.

The lever 58 is bent in a " C "shape using a round bar made of metal, for example, as shown in Figs. 4 and 5, 15 and 16, And can be welded to the plate 50f.

The present invention is characterized in that it comprises a retaining plate (71) (73) installed in the horizontal channel (30) (32); Hollow bosses 72 and 74 provided on the engagement plates 71 and 73; The engagement holes 51h and 52h formed in the parallel links 51 and 52; And a lock pin 70 inserted into the engagement holes 51h and 52h through the hollow bosses 72 and 74 to maintain the lifting position of the lifting bracket 50. [

The hollow bosses 72 and 74 installed on the horizontal channels 30 and 32 located on the left and right sides are installed on the upper surface of the horizontal channels 30 and 32 so as to be centered with each other, 52 and 53 and 54 are formed so as to coincide with the center of the hollow bosses 72 and 74 when the lifting bracket 50 is lifted.

The lock pin 70 can be made, for example, to bend one end portion in an " L "

The present invention includes an arm (80) extending upward from a lower portion of a fixing bracket (40) and spaced apart from an end of the core specimen (20); A vertical slot 81 formed in the arm 80; A slider 82 inserted into the vertical slot 81 and slidable in the vertical direction; A bolt coupling portion 83 formed at one end of the slider 82; A nut 84 coupled with the bolt engagement portion 83; A spherical coupling portion 85 formed at the other end of the slider 82; A ball joint 86 fitted into the spherical coupling portion 85 and spherical to each other; And a rotary disk 87 provided on the ball joint 86 for supporting the end portion of the core specimen 20. [

The arm 80 can be formed to have a "C" cross-sectional shape as shown in FIGS. 6, 7, and 9, and one of the two fixing brackets 40, And a bending portion 88 is formed at a connection portion between the welded portion 89 and the arm 80. The bending portion 88 is formed by a horizontal weld portion 89 for welding to the bottom plate 40f.

A washer 84a may be provided between the nut 84 and the arm 80 to transmit the fastening force to a large area when the nut 84 and the bolt coupling portion 83 are engaged.

The present invention includes a pair of hanger bars 91 and 92 installed parallel to legs 30a, 30b, 32a and 32b; A water receiver 90 for receiving washing water W1 falling from the core specimen 20; And V-bending portions 93 and 94 formed parallel to both edges of the water receiver 90 and engaged with the hanger bars 91 and 92, respectively.

4 and 11, the water receptacle 90 can weld the water receptacle 90 by welding the handles 95 and 96 to the front and rear side surfaces, thereby making it easy to pull out the water receptacle 90. In addition, 97 and the drainage passage 98 may be formed so that the remaining wash water W1 flows to the drainage passage 98 along the inclined bottom surface 97 and the drainage passage 98 is connected to the drainage hole 98 for discharging the washing water W1. And a nipple 99a for opening and closing is installed in the drain port 99. [

The hanger bars 91 and 92 for supporting the water receiver 90 are provided with an L-shaped cantilever bar 91a (91b) (92a) provided on the legs 30a, 30b, 32a and 32b ) 92b.

Hereinafter, the operation according to the present invention will be described in detail with reference to the accompanying drawings.

The elevation bracket 50 is lowered as shown in Fig. 10, and in a state in which the core specimen 20 is not placed on the axial guide rollers 55, 56 and 57, The parallel links 51, 52, 53 and 54 rotate about the rotation center shaft 31 and 33 as the lift bracket 50 is lifted upward by holding the lever 58 by hand, The lifting and lowering bracket 50 is lifted while being kept horizontal.

When the lifting bracket 50 is lifted up, as shown in FIG. 13, the center of the axial guide rollers denoted by reference numerals '55' and '57' passes through the center of the rotational center shaft 31 (33) 13, the lifting bracket 50 is moved to the left of the fixing brackets 40, 42 by its own weight while the center of gravity is moved to the left in the drawing of Fig. 13 with respect to the vertical line V1, Thereby maintaining the raised state.

15, the lock pin 70 is inserted into the parallel link 51 through the holes of the engagement plates 71 and 73 and the hollow bosses 72 and 74 provided on the horizontal channels 30 and 32, It is possible to prevent the lifting and lowering bracket 50 from being lowered naturally by inserting the lifting bracket 50 into the fastening holes 51h and 52h formed in the fastening portions 51g and 52g.

Thereafter, the core specimen 20 is placed on the axial guide rollers 55, 56 and 57 provided on the raised lifting bracket 50 and then the core specimen 20 is pushed toward the rotating disk 87 in the axial direction The core specimen 20 is conveyed in the linear direction toward the rotary disk 87 by the axial guide rollers 55, 56 and 57 and the axial guide rollers 55, 56 and 57 are rotated So as to guide the core specimen 20 smoothly.

At this time, as shown in the enlarged view of FIG. 14, the core specimen 20 is in contact with the axial guide rollers 55, 56 and 57, and the radial support rollers 43, 44, 45 and 46 44, 45 and 46 when the core specimen 20 is conveyed in the axial direction because the gap G2 is formed apart from the core supporting body 20. [

As shown in FIG. 13, when the core specimen 20 is transferred toward the rotating disk 87 and the irregular broken end surface 24 formed on the end of the core specimen 20 contacts the rotating disk 87, The rotary disc 87 is tilted along the inclination of the fracture end face 24 by the engaging portion 85 and the ball joint 86 and is in surface contact with the fracture end face 24 to support the core specimen 20.

At this time, the nut 84 is loosely loosened and the bolt engaging portion (not shown) is pulled along the vertical slot 81 formed in the arm 80. As a result, The center of the rotary disc 87 and the center of the core specimen 20 coincide with the center of the core specimen 20, And the nut 84 which has been loosened after tightening is again tightened, the rotating disk 87 maintains the adjusted height.

13, when the fracture end face 24 of the core specimen 20 comes into contact with the rotating disk 87 and the lift pin 50 is lifted up, 52 and 53 formed in the parallel links 51 and 52 and 53 and 54 provided on the upper portion of the lifting bracket 50 and the hollow bosses 72 and 74 provided on the lifting bracket 50, The jam is released.

When the lifting bracket 50 is slightly pulled forward and then lowered by holding the lever 58, the parallel links 51, 52, 53 and 54 are lifted downward as shown in FIGS. 10 to 12, The elevating bracket 50 is lowered while being kept horizontal while being rotated around the axes 31 and 33.

When the feet 34 and 36 provided at the lower ends of the legs 30a, 30b and 32a and 32b are stepped on and the lever 58 is operated, the foots 34 and 36 and the legs 30a ) 30b (32a) and (32b) can be prevented from moving on the floor (22), thereby enabling a more stable operation.

That is, even if the lock pin 70 is removed, the center of the axial guide rollers denoted by reference numerals '55' and '57' in FIG. 13 corresponds to the vertical line V1 passing through the rotation center shaft 31 So that the lifting bracket 50 can not be lowered naturally due to its own weight, and is maintained in a state of being lifted up by the fixing brackets 40 and 42. As a result,

At this time, when the lifting bracket 50 is pulled to the front side rightward in the drawing using the lever 58, the center of gravity is moved to the right side of the rotational center shaft 31 (33) And is stopped when the bottom plate 50f of the lifting bracket 50 is brought into contact with the upper end of the fixing brackets 40 and 42 to maintain the lowered state.

10 and 11, the core specimen 20 is brought into contact with the radial supporting rollers 43, 44, 45 and 46, and the axial direction guide rollers 43, Since the gap G1 is formed away from the rollers 55, 56 and 57, the core specimen 20 is supported by the radial supporting rollers 43, 44 and 45 as shown in Figs. 11 and 12, So that it can be smoothly rotated on the rotary shaft 46.

When the core specimen 20 is sprayed onto the core specimen 20 while the core specimen 20 is rotated on the radial support rollers 43, 44, 45 and 46 and simultaneously the wash water W1 is sprayed onto the core specimen 20, The whole is washed, and the washing water W1 is collected and collected by the water receiving unit 90 located below.

Since the core specimen 20 is thus cleaned while being rotated in place by the radial supporting rollers 43, 44, 45 and 46, it is possible to prevent the core specimen 20 from moving So that a large space for washing is not required.

Since the rotary disk 87 which is in contact with the fracture end face 24 of the core specimen 20 is provided in the ball joint 86 coupled to the spherical coupling portion 85, Thereby helping the core specimen 20 to rotate smoothly.

If the water level of the wash water W1 that has fallen to the water receiving unit 90 during the washing of the core specimen 20 is increased and the water level of the washing water W1 has to be emptied and the core 95 is to be pulled by the hand, The bent portions 93 and 94 formed on the hanger 90 are separated while sliding on the hanger bars 91 and 92. [

The water receptacle 90 is tilted or turned upside down by the handles 95 and 96 provided on the water receptacle 90 with both hands so that the washing water W1 is discharged and then the V-bending portions 93 and 94 are moved to the hanger bar 91 92, the water receptacle 90 is positioned at the bottom of the horizontal channels 30, 32.

If the nipple 99a provided at the drain port 99 is left open when the water receptacle 90 is left in the floor 22 without being separated from the hanger bars 91 and 92, The washing water W1 that has fallen to the inclined bottom surface 97 of the water receiver 90 during the washing is discharged through the drain port 99 opened to the drainage path 98 along the inclined bottom surface 97.

Since the core specimen 20 is placed on the radial supporting rollers 43, 44, 45 and 46 while the core specimen 20 is cleaned with the washing water W1, It is possible to prevent the core specimen 20 from being contaminated.

When a 1% solution of phenolphthalein is applied to the surface of the core specimen 20 thus washed, a red color reaction occurs at a portion where carbonation does not proceed, and a colorless reaction occurs at a portion where carbonation proceeds. By measuring the length of the part, the depth of carbonation of the concrete structure can be known.

When the lock pin 70 is detached after the completion of the carbonation test of the core specimen 20 and the lifting bracket 50 is lowered by the lever 58 as shown in Figs. 13 to 16, the core specimen 20 Of the core specimen 20 contact the axial guide rollers 55, 56 and 57 and fall off the radial support rollers 43, 44, 45 and 46, The core specimen 20 can be lowered to the floor 22 more easily by guiding the axial guide rollers 55, 56 and 57. [

20: core specimen 22: bottom
24: Fracture surface 30,32: Horizontal channel
30a, 30b, 32a, 32b: leg portions 30e, 30f, 30g, 30h:
32e, 32f, 32g, 32h: right hole 31, 33:
34, 36: Footstool 40, 42: Retaining bracket
40a, 40b, 40c, 40d: rear holes 40e, 40f, 40g, 40h:
42a, 42b, 42c, 42d: front holes 42e, 42f, 42g, 42h:
40f, 42f, 50f: bottom plates 43, 44, 45, 46:
43h, 44h: radial roller holes 43p, 44p, 45p, 46p: radial pins
50: lifting bracket 51,52,53,54: parallel link
51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b:
51g, 52g: piercing 51h, 52h:
55, 56, 57: axial direction guide rollers 55a, 55b, 56a, 56b, 57a, 57b:
55c, 55d, 56c, 56d, 57c, 57d: supporting plates 55h, 56h, 57h:
55p, 56p, 57p: axial pin 58: lever
59a, 59b: crusher bar 70: locking pin
71, 73: Retaining plates 72, 74: hollow boss
80: arm 81: vertical slot
82: Slider 83: Bolt coupling part
84: Nut 84a: Washer
85: spherical coupling part 86: ball joint
87: rotating disk 88: bending part
89: weld portion 90:
91, 92: hanger bars 91a, 91b, 92a, 92b:
93,94: V-bending portion 95,96: Handle
97: inclined bottom surface 98: drainage
99: Drain 99a: Nipple
W1: Wash water G1, G2: Gap
Vertical line: V1

Claims

A pair of horizontal channels (30) (32) installed at a distance from each other and parallel to the axial direction of the core specimen (20);
Legs 30a, 30b, 32a, and 32b that are bent downward from the outer side surfaces of the horizontal channels 30 and 32 toward the bottom 22, respectively;
A foot plate 34 installed at a lower end of the legs 30a, 30b, 32a and 32b and supported by the floor 22;
Fixing brackets 40 and 42 installed at a distance from each other on the horizontal channels 30 and 32;
Radial support rollers 43, 44, 45 and 46 provided on the fixing brackets 40 and 42 to support the core specimen 20;
A plurality of parallel links 51, 52, 53, 54 installed inside the horizontal channels 30, 32;
A lifting bracket 50 installed at an upper end of the parallel links 51, 52, 53 and 54;
Axial guide rollers 55, 56, 57 installed on the lifting bracket 50 for guiding the core specimen 20 in the axial direction;
A lever 58 installed on the lifting bracket 50;
A device for measuring carbonation depth for safety diagnosis of reinforced concrete structures using core specimens.

The method according to claim 1,
Anchor plates 71 and 73 installed on the horizontal channels 30 and 32;
A hollow boss 72 (74) provided on the retaining plate 71 (73);
The engagement holes 51h and 52h formed in the parallel links 51 and 52;
A locking pin 70 inserted into the retaining holes 51h and 52h through the hollow bosses 72 and 74 to maintain the lifted position of the lifting bracket 50;
The depth measurement of carbonation depth for safety diagnosis of reinforced concrete structures using core specimens.

The method according to claim 1,
An arm (80) extending upward from a lower portion of the fixing bracket (40) and spaced apart from an end of the core specimen (20);
A vertical slot 81 formed in the arm 80;
A slider 82 inserted into the vertical slot 81 and slidable in the vertical direction;
A bolt coupling portion 83 formed at one end of the slider 82;
A nut 84 coupled with the bolt coupling portion 83;
A spherical coupling part 85 formed at the other end of the slider 82;
A ball joint 86 fitted in the spherical coupling part 85 and spherical to the spherical coupling part 85;
A rotary disk 87 installed on the ball joint 86 and supporting an end of the core specimen 20;
The depth measurement of carbonation depth for safety diagnosis of reinforced concrete structures using core specimens.

The method according to claim 1,
A pair of hanger bars 91 and 92 installed parallel to the legs 30a, 30b, 32a and 32b;
A water receiver (90) for receiving washing water (W1) falling from the core specimen (20);
V-bending portions 93 and 94 formed parallel to both edges of the water receiver 90 and engaged with the hanger bars 91 and 92;
A device for measuring carbonation depth for safety diagnosis of reinforced concrete structures using core specimens.