Device for detecting relative bonding strength of coated steel bar and concrete

Abstract

The utility model discloses a device for detecting the relative bonding strength of a coated steel bar and concrete, which relates to the field of constructional engineering and comprises a pouring mold body with the top and one end open; the adjusting end plate is adjustably mounted on the inner side of the pouring mold body; wherein the length of the concrete pouring volume in the pouring mold body is adjusted by adjusting the position of the adjusting end plate in the pouring mold body, and the concrete pouring space in the test mold can be adjusted by arranging the adjusting end plate with the position capable of being adjusted; the position of the end plate is adjusted to change the concrete pouring volume length in the test mold so as to adapt to steel bars with different lengths, and the applicability of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of building engineering especially, relate to a coating reinforced bar and concrete relative bonding strength detection device. BACKGROUND

[0002] In modern building engineering, coating reinforced bar is widely used by virtue of its excellent anticorrosive performance, and the relative bonding strength between coating reinforced bar and concrete directly influences the stability and durability of building structure and is the key index of engineering quality evaluation.

[0003] In the coating reinforced bar and concrete relative bonding strength detection test, it needs to use cuboid pull-out test mould to make "pull-out test piece", and since the specifications of "pull-out test piece" corresponding to the reinforced bars of different lengths exist differences, the traditional cuboid pull-out test mould does not have the function of length adjustment, so it needs to customize cuboid pull-out test moulds of multiple length specifications, and the flexibility of test mould needs to be improved, therefore, in order to adjust the length of the concrete pouring volume in the test mould, the device designs a coating reinforced bar and concrete relative bonding strength detection device. UTILITY MODEL CONTENTS

[0004] The utility model discloses a coating reinforced bar and concrete relative bonding strength detection device.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A coating reinforced bar and concrete relative bonding strength detection device, comprising:

[0007] The pouring mould body is open at the top and one end;

[0008] The adjusting end plate is adjustably installed on the inner side of the pouring mould body;

[0009] The length of the concrete pouring volume in the pouring mould body is adjusted by adjusting the position of the adjusting end plate in the pouring mould body.

[0010] The above-mentioned technical scheme further comprises that the pouring mould body comprises a bottom plate, a fixed end plate and two side plates, notches are formed on the outer walls of the two side plates, the bottom plate is clamped and installed in the notches, and the fixed end plate is installed at the position adjacent to the end side of the bottom plate and the two side plates.

[0011] A first pulling assembly is installed between the two side plates, the first pulling assembly comprises a pulling rod, screw rods are fixedly installed at two ends of the pulling rod respectively, first through holes are formed in the two side plates respectively, the two screw rods are inserted into the two first through holes respectively, and first locking nuts are installed and locked by screwing on the two screw rods.

[0012] A second pulling assembly is arranged on the pulling rod, the second pulling assembly comprises a fastening screw rod, a second through hole is formed in the pulling rod, the fastening screw rod is movably penetrated through the second through hole, a second locking nut is fixedly installed on the outer wall of the fixed end plate, and the end of the fastening screw rod is connected to the inside of the second locking nut in a threaded mode.

[0013] A plurality of threaded through holes are formed in the side wall of the adjusting end plate, fixed screw rods are connected to the inner walls of the threaded through holes in a threaded mode, and the ends of the fixed screw rods are pressed and fixed on the outer wall of the side plate.

[0014] A second sleeve is installed on the adjusting end plate, a first sleeve is also installed on the adjusting end plate through a connecting frame, and the first sleeve and the second sleeve are arranged in parallel.

[0015] A slot is also formed in the outer wall of the fixed end plate, the end of the coated reinforcing steel bar is movably penetrated through the inside of the slot and extends to the outside of the slot, and a rubber pad is arranged on the inner wall of the slot.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] In the utility model, the adjusting end plate with the adjustable position is arranged, the space for pouring concrete in the test mold can be adjusted through the adjusting end plate, that is, the position of the adjusting end plate is adjusted to change the pouring volume and length of the concrete in the test mold, so that the reinforcing steel bars with different lengths can be used, and the applicability of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a sectional view structural schematic diagram of the utility model;

[0019] Figure 2 It is a first overall structure schematic diagram of the utility model;

[0020] Figure 3 It is a second overall structure schematic diagram of the utility model;

[0021] Figure 4 It is an explosion structure schematic diagram of the utility model.

[0022] In the drawings:

[0023] 11, bottom plate; 12, fixed end plate; 121, slot; 13, side plate; 131, notch; 14, pull rod; 141, screw rod; 142, first locking nut; 143, first through hole; 15, fastening screw; 151, second through hole; 152, second locking nut; 20, adjusting end plate; 21, fixing screw; 22, connecting frame; 23, first sleeve; 24, second sleeve. DETAILED DESCRIPTION

[0024] The technical scheme of the utility model will be further explained below in combination with the drawings and specific embodiments.

[0025] Embodiment one

[0026] Refer to the drawings Figures 1-4 , comprising:

[0027] The top and one end of the pouring mold body are open;

[0028] The adjusting end plate 20 is adjustably installed on the inner side of the pouring mold body. The side wall of the adjusting end plate 20 is provided with a plurality of threaded through holes, the inner wall of the threaded through hole is threadedly connected with a fixing screw 21, and the end of the fixing screw 21 is pressed and fixed on the outer wall of the side plate 13. Wherein, the position of the adjusting end plate 20 can be adjusted. When adjusting, the fixing screw 21 is counterclockwise rotated to release the fixing of the adjusting end plate 20 by the fixing screw 21, then the position of the adjusting end plate 20 is moved, when the position is adjusted to the appropriate position, the fixing screw 21 is clockwise rotated to lock and fix the adjusting end plate 20. In addition, the top wall of the side plate 13 can be provided with a scale line, the position of the adjusting end plate 20 can be conveniently observed through the scale line, and the length of the concrete pouring in the pouring mold body can be conveniently and intuitively observed.

[0029] Wherein, the length of the concrete pouring volume in the pouring mold body is adjusted by adjusting the position of the adjusting end plate 20 in the pouring mold body.

[0030] The pouring mold body comprises a bottom plate 11, a fixed end plate 12 and two side plates 13. The outer wall of the two side plates 13 is provided with a notch 131, the two sides of the bottom plate 11 are respectively clamped and installed in the inner side of the notch 131, and the fixed end plate 12 is installed at the position adjacent to the end side of the bottom plate 11 and the two side plates 13. Wherein, the cuboid region formed between the bottom plate 11, the fixed end plate 12, the two side plates 13 and the adjusting end plate 20 is the space for concrete pouring.

[0031] A first pulling assembly is mounted between the two side plates 13, the first pulling assembly comprising a pulling rod 14, both ends of the pulling rod 14 being fixedly provided with a screw rod 141, first through holes 143 being formed in the two side plates 13, the two screw rods 141 being respectively inserted into the two first through holes 143, and a first locking nut 142 being threadedly mounted on the screw rod 141 to lock and fix the same; wherein the first pulling assembly is arranged to improve the stability of the installation of the two side plates 13 and the bottom plate 11, and the principle is that when the two side plates 13 are spliced to the side edges of the bottom plate 11, the screw rods 141 at both ends of the pulling rod 14 are respectively inserted into the first through holes 143, and then the first locking nut 142 is mounted on the screw rod 141 until the outer wall of the side plate 13 is tightly pressed against the side wall of the bottom plate 11.

[0032] A second pulling assembly is arranged on the pulling rod 14, the second pulling assembly comprising a fastening screw rod 15, a second through hole 151 being formed in the pulling rod 14, the fastening screw rod 15 being movably penetrated from the inside of the second through hole 151, a second locking nut 152 being fixedly mounted on the outer wall of the fixed end plate 12, and the end of the fastening screw rod 15 being threadedly connected to the inside of the second locking nut 152; wherein the second pulling assembly is arranged to improve the stability of the installation of the fixed end plate 12 on the bottom plate 11 and the end wall of the side plate 13, that is, by mounting the end of the fastening screw rod 15 in the inside of the second locking nut 152, when the fastening screw rod 15 is rotated, the fixed end plate 12 is tightly pressed against the end wall of the bottom plate 11 and the side plate 13.

[0033] The adjusting end plate 20 is mounted with a second sleeve 24, and the adjusting end plate 20 is further mounted with a first sleeve 23 through a connecting frame 22, the first sleeve 23 and the second sleeve 24 being arranged in parallel; wherein the first sleeve 23 and the second sleeve 24 play a role in stabilizing the placement of the reinforcing steel bars, and the inside of the first sleeve 23 and the second sleeve 24 is provided with a rubber pad, which is used to compensate for the gap between the first sleeve 23 / second sleeve 24 and the reinforcing steel bars, so as to avoid the overflow of concrete from the gap.

[0034] The outer wall of the fixed end plate 12 is further provided with a slot 121, the end of the coated reinforcing steel bar being movably penetrated from the inside of the slot 121 and extending to the outside of the slot 121, and the inner wall of the slot 121 is also provided with a rubber pad, which is used to compensate for the gap between the slot 121 and the reinforcing steel bar, so as to avoid the overflow of concrete from the gap; wherein the coated reinforcing steel bar can be inserted into the slot 121 before pouring, which is convenient for the later pull-out test.

[0035] In this embodiment, the working principle of the device is that before the test of the relative bond strength between the coated reinforcing steel bar and the concrete is carried out, the device is adjusted according to the length of the coated reinforcing steel bar to be detected.

[0036] First, clockwise rotation of the fixed screw 21, remove its fixed to the adjusting end plate 20, according to the scale line on the top wall of the side plate 13, the adjusting end plate 20 is moved to the appropriate position, then clockwise rotation of the fixed screw 21, so that its end top pressure on the outer wall of the side plate 13, thereby locking the adjusting end plate 20, to determine the length of the pouring volume of concrete in the pouring mold body;

[0037] Next, the coating steel bar is inserted into the slot 121 of the outer wall of the fixed end plate 12 through the first sleeve 23 and the second sleeve 24 on the adjusting end plate 20, and the gap between the steel bar and the first sleeve 23 and the second sleeve 24 is filled with the internal rubber pad to prevent concrete from overflowing during pouring;

[0038] Subsequently, the concrete pouring operation is carried out, the pouring mold body is formed by the bottom plate 11, the fixed end plate 12, the two side plates 13 and the adjusting end plate 20 to form a rectangular concrete pouring space, the first pulling assembly is provided with the pulling rod 14, both ends of the pulling rod 14 are inserted into the first through hole 143 of the side plate 13, and the first locking nut 142 is locked to ensure the stability of the connection between the two side plates 13 and the bottom plate 11; the fastening screw 15 of the second pulling assembly is movably penetrated through the second through hole 151 of the pulling rod 14, and the end is threadedly connected in the second locking nut 152 of the outer wall of the fixed end plate 12, and the rotation of the fastening screw 15 can make the fixed end plate 12 closely adhere to the end wall of the bottom plate 11 and the side plate 13, further stabilizing the whole mold structure;

[0039] After the concrete pouring is completed and reaches the design strength, the pull-out test is carried out, the pull-out equipment is connected with the coating steel bar inserted into the slot 121, the pulling force is applied, and the data in the pull-out process, such as the pulling force and the displacement of the steel bar, are measured to evaluate the relative bond strength between the coating steel bar and the concrete.

[0040] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A device for detecting the relative bond strength of a coated reinforcing bar to concrete, characterised in that, The utility model relates to a pouring mold, including: The top and one end of the pouring mold body are open; An adjusting end plate (20) is adjustably mounted on the inner side of the pouring mold body; The length of the concrete pouring volume inside the pouring mold body is adjusted by adjusting the position of the adjusting end plate (20) inside the pouring mold body.

2. The device for detecting the relative bond strength between a coated reinforcing bar and concrete according to claim 1, wherein The pouring mold body comprises a bottom plate (11), a fixed end plate (12) and two side plates (13), the outer walls of the two side plates (13) are each provided with a slot (131), the two sides of the bottom plate (11) are respectively clamped and mounted inside the slots (131), and the fixed end plate (12) is mounted at the position adjacent to the end side of the bottom plate (11) and the two side plates (13).

3. The device for detecting the relative bond strength between a coated reinforcing bar and concrete according to claim 2, characterized in that, A first pulling assembly is mounted between the two side plates (13), the first pulling assembly comprises a pulling rod (14), the two ends of the pulling rod (14) are respectively fixedly provided with a screw rod (141), first through holes (143) are respectively formed in the two side plates (13), the two screw rods (141) are respectively inserted into the two first through holes (143), and first locking nuts (142) are fixedly locked by being screwed.

4. The device for detecting the relative bond strength between a coated reinforcing bar and concrete according to claim 3, characterized in that, A second pulling assembly is arranged on the pulling rod (14), the second pulling assembly comprises a fastening screw rod (15), a second through hole (151) is formed in the pulling rod (14), the fastening screw rod (15) is movably penetrated from the inside of the second through hole (151), a second locking nut (152) is fixedly mounted on the outer wall of the fixed end plate (12), and the end of the fastening screw rod (15) is screwed into the inside of the second locking nut (152).

5. The device for detecting the relative bond strength between a coated reinforcing bar and concrete according to claim 4, characterized in that, A plurality of threaded through holes are formed in the side wall of the adjusting end plate (20), fixed screw rods (21) are screwed into the inner walls of the threaded through holes, and the ends of the fixed screw rods (21) are abuttingly fixed to the outer walls of the side plates (13).

6. The device for detecting the relative bond strength between a coated reinforcing bar and concrete according to claim 5, wherein A second sleeve (24) is mounted on the adjusting end plate (20), a first sleeve (23) is also mounted on the adjusting end plate (20) through a connecting frame (22), and the first sleeve (23) and the second sleeve (24) are arranged in parallel.

7. The device for detecting the relative bond strength between a coated reinforcing bar and concrete according to claim 6, characterized in that, An insertion slot (121) is also formed in the outer wall of the fixed end plate (12), the end of the coated reinforcing steel bar is movably penetrated from the inside of the insertion slot (121) and extends to the outside of the insertion slot (121).

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