CN214373995U

CN214373995U - Asphalt concrete and cement concrete bonding strength testing arrangement

Info

Publication number: CN214373995U
Application number: CN202120533075.1U
Authority: CN
Inventors: 沈金阳; 田代亮; 彭洋; 宋振航; 苏斌
Original assignee: Zhongda Testing Hunan Co Ltd
Current assignee: Zhongda Intelligent Technology Co ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-10-08
Anticipated expiration: 2031-03-15

Abstract

The utility model discloses a device for testing the bonding strength of asphalt concrete and cement concrete, which comprises a machine table, a lifting assembly and a clamping assembly; the lifting component is arranged above the clamping component in a lifting manner; the clamping assembly comprises a leaning seat and a telescopic piece; the movable path of the telescopic piece corresponds to the position of the leaning seat; the center of one side of the leaning seat facing the telescopic piece is provided with an accommodating groove; a cushion block is embedded in the containing groove; the projection of the movable end of the telescopic piece in the self movement direction is positioned in the containing groove; utilize the height that promotes the subassembly and adjust test sample spare to with make to lean on the seat to switch between these two functions of structure can be held with shearing in the centre gripping cooperation, can accomplish two operations on an equipment, greatly promoted efficiency of software testing.

Description

Asphalt concrete and cement concrete bonding strength testing arrangement

Technical Field

The utility model relates to a concrete technical field especially relates to an asphalt concrete and cement concrete bonding strength testing arrangement.

Background

In engineering construction, concrete is often required to cast a structure, and due to the requirements of engineering design, more than one concrete material is sometimes used. The bonding strength of different types of concrete at the joint interface often directly determines the overall structural strength level. For the structural strength of the concrete engineering, the parameters which need to be often investigated include tensile strength and shear strength, while the traditional general mechanical testing equipment can only test one of the parameters, and the adaptability of the clamp part to the concrete material is limited. Therefore, it is necessary to invent a device for testing the bonding strength of asphalt concrete and cement concrete, which has the functions of tensile testing and shear testing and has good clamping adaptability.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the not enough of existence among the prior art, the utility model provides a have tensile concurrently and shear test function, the good asphalt concrete and cement concrete bonding strength testing arrangement of centre gripping adaptability.

The technical scheme is as follows: in order to achieve the above purpose, the utility model discloses a bonding strength testing device for asphalt concrete and cement concrete, which comprises a machine table, a lifting assembly and a clamping assembly; the lifting assembly is arranged above the clamping assembly in a lifting mode; the clamping assembly comprises a leaning seat and a telescopic piece; the movable path of the telescopic piece corresponds to the position of the leaning seat; an accommodating groove is formed in the center of one side, facing the telescopic piece, of the leaning seat; a cushion block is embedded in the accommodating groove; the projection of the movable end of the telescopic piece in the self movement direction is positioned in the accommodating groove; and a hoop is arranged above the accommodating groove.

Further, the machine table comprises a base; the top of the base is provided with a sliding chute; the leaning seat is in sliding fit with the sliding groove.

Further, the length direction of the sliding groove is perpendicular to the movement direction of the telescopic piece.

Further, the machine table also comprises a top plate; the top plate is positioned above the base; the lifting assembly comprises a hydraulic telescopic rod, an assembly part and a cylindrical body; the hydraulic telescopic rod is vertically arranged; the hydraulic telescopic rod is connected with the top plate; the assembly part is connected with the movable end of the hydraulic telescopic rod; the cylindrical body is inserted at the upper end of the test sample piece; a first hole site and a second hole site are arranged on the assembly part; a first pull rope penetrates through the first hole position; a second pull rope penetrates through the second hole; the first pull rope and the second pull rope are respectively connected with two ends of the cylindrical body.

Further, the first hole sites and the second hole sites are arranged at intervals along the vertical direction.

Furthermore, a supporting piece is connected between the top plate and the base; the supporting piece comprises a back plate and a reinforcing rib plate; the reinforcing rib plate is vertically connected with the back plate.

Further, the reinforcing rib plate is connected with the back plate in a T-shaped welding mode.

Further, the cylindrical body comprises a core rod, a soft sleeve and an annular piece; the soft sleeve is fitted and sleeved on the surface of the core rod; the annular pieces are connected in pairs and arranged at two ends of the core rod; the first pull rope and the second pull rope are respectively connected with the ring-shaped piece at the corresponding ends in a penetrating mode.

Has the advantages that: the utility model discloses a bonding strength testing device for asphalt concrete and cement concrete, which comprises a machine table, a lifting assembly and a clamping assembly; the clamping assembly comprises a leaning seat and a telescopic piece; the movable path of the telescopic piece corresponds to the position of the leaning seat; an accommodating groove is formed in the center of one side, facing the telescopic piece, of the leaning seat; the lifting assembly is used for adjusting the height of the test sample piece, so that the test sample piece and the leaning seat can be switched between two functions of clamping fit and shearing bearing structure, two operations can be completed on one device, and the test efficiency is greatly improved; the lifting assembly adopts a columnar structure to insert the sample injection member to reserve the hole site, so that the pulling force is ensured to be uniformly transmitted to the inner wall surface of the hole site, and the testing precision is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a strength testing apparatus;

FIG. 2 is a schematic view of a chute position;

FIG. 3 is a schematic view of a lifting assembly;

FIG. 4 is a schematic view of a test sample;

FIG. 5 is a schematic view of the hoop position;

fig. 6 is a schematic view of the shape of the test specimen.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

A device for testing the bonding strength of asphalt concrete and cement concrete is shown in figure 1 and comprises a machine table 1, a lifting assembly 2 and a clamping assembly 3; the lifting assembly 2 is arranged above the clamping assembly 3 in a lifting mode; the clamping assembly 3 comprises a seat 31 and a telescopic piece 32; the moving path of the telescopic piece 32 corresponds to the position of the leaning seat 31; a containing groove 311 is formed in the center of one side of the leaning seat 31 facing the telescopic piece 32; a cushion block 312 is embedded in the accommodating groove 311; the projection of the movable end of the telescopic member 32 in the self-moving direction is located inside the accommodating groove 311; the hoop 301 is arranged above the accommodating groove 311;

the two ends of the test sample piece 9 are respectively pulled by the clamping component 3 and the lifting component 2, so that tensile test can be carried out on the positions of the bonding and combining interfaces of two different concrete blocks, and the lifting component 2 is provided with a tension sensor for monitoring a test value; the telescopic member 32 may specifically be a hydraulic telescopic device equipped with a force sensor; meanwhile, the contact part of the test sample piece 9 and the leaning seat 31 can be changed through the lifting adjustment of the lifting assembly 2; as shown in fig. 5, the two positions are indicated by the force, when the cushion block 312 is in contact with the lower half part of the sample piece as shown in a part a in fig. 5, the sample piece is suitable for performing a tensile test operation in the vertical direction; when the lower half part of the sample piece is transversely corresponding to the containing groove 311 as shown in part b of fig. 5, the cushion block 312 is removed, the sample piece can be transversely pressed by using the telescopic piece 32, so that transverse shear test operation is realized, and the containing groove 311 plays a role in collecting a fractured part of the sample piece; the two test modes are flexible to adjust, two operations can be completed on one device, and the test efficiency is greatly improved; the working principle of the hoop 301 is as shown in fig. 5, when a transverse shear test is performed, the upper half part of the test sample 9 is tightened on the surface of the seat by using the belt-shaped structure of the hoop 301, so that the position of the upper half part is kept stable when the lower half part of the sample is pressed; in addition, the wavy line of the test piece 9 in fig. 5 indicates the interface where the two parts are bonded, and the arrow on the right side of the test piece indicates the direction of the pressing force applied by the extensible member 32; the width of the hoop 301 is only shown as a position, and in practical use, the width can be increased to obtain a more reliable effect of stabilizing the test sample.

As shown in fig. 4, the structure of the test sample 9 includes a first concrete block 91 and a second concrete block 92, and the two concrete blocks may be two of any materials such as asphalt concrete block and cement concrete block;

in addition, when the requirement on the clamping force of the sample is high, the positioning hole 94 can be reserved in the lower half part of the test sample 9 during casting, and the pin column is additionally arranged on the end face of the movable end of the telescopic piece 32, so that the installation firmness of the sample can be further improved on the basis of clamping and fixing matching of the backup seat and the telescopic piece by utilizing the matching of the pin column and the positioning hole; the pin column is matched with the corresponding end surface of the telescopic piece by a threaded screw hole so as to be convenient to disassemble, and the bottom of the accommodating groove can be correspondingly provided with an embedded groove used for fixing the corresponding end of the pin column;

fig. 6 shows a design of the test specimen, in which the cross-sectional area of the bonded joint is reduced, so that the fracture position in tension is always present at the bond.

As shown in fig. 2, the machine 1 includes a base 11; the top of the base 11 is provided with a chute 12; the leaning seat 31 is in sliding fit with the sliding chute 12; by adjusting the position of the leaning seat 31 or replacing the leaning seat, the aligning position of the accommodating groove 311 and the telescopic piece 32 can be correspondingly adjusted, so that the device is suitable for test samples 9 with different sizes, and the working adaptability of the device is further improved.

The length direction of the sliding groove 12 is perpendicular to the movement direction of the telescopic piece 32, so that the clamping direction is guaranteed to be applied to the surface of the sample piece along the perpendicular direction, the interference to the test result is reduced, and the clamping stability is improved.

As shown in fig. 1 and 3, the machine table 1 further includes a top plate 13; the top plate 13 is positioned above the base 11; the lifting assembly 2 comprises a hydraulic telescopic rod 21, an assembly part 22 and a cylindrical body 23; the hydraulic telescopic rod 21 is vertically arranged; the hydraulic telescopic rod 21 is connected with the top plate 13; the assembly part 22 is connected with the movable end of the hydraulic telescopic rod 21; the cylindrical body 23 is inserted and arranged at the upper end of the test sample piece 9; as shown in fig. 4, a force application hole 93 is reserved on the test sample 9 during the manufacturing process for matching with the cylinder 23; the assembly member 22 is provided with a first hole position 221 and a second hole position 222; a first pull rope 223 penetrates through the first hole position 221; a second pull rope 224 is arranged in the second hole 222; the first pulling rope 223 and the second pulling rope 224 are respectively connected with two ends of the cylindrical body 23;

the stay cord structure specifically can adopt materials such as wire rope, through applying pulling force to cylindricality body 23, can evenly apply the corresponding part of test sample 9 with load, and this kind of bolt formula of cylindricality body 23 cooperation mode dismouting efficiency is also high, is convenient for carry out continuous batch test to test sample 9.

The first hole locations 221 and the second hole locations 222 are arranged at intervals along the vertical direction, so that the stress direction of the rope pulling structure is consistent with the telescopic path of the hydraulic telescopic rod 21, and the precision of test data is improved.

A support 15 is connected between the top plate 13 and the base 11; the supporting part 15 comprises a back plate 151 and a reinforcing rib plate 152; the reinforcing rib plate 152 is vertically connected with the back plate 151; stiffener plates 152 may enhance the bending resistance of back plate 151.

The reinforcing rib plate 152 is connected with the back plate 151 by T-shaped welding, so that a firm bending-resistant whole can be formed, and the overall structural strength of the machine 1 is enhanced.

As shown in fig. 3, the cylindrical body 23 includes a core rod 231, a soft sleeve 232, and an annular member 233; the soft sleeve 232 is fitted and sleeved on the surface of the core rod 231; the rings 233 are coupled to be disposed at both ends of the mandrel 231; the first pulling rope 223 and the second pulling rope 224 are respectively connected with the ring-shaped members 233 at the corresponding ends in a penetrating manner; the soft sleeve 232 can be made of rubber, and by utilizing the elastic deformation capability of the soft sleeve, the pulling force from the core rod 231 is ensured to be uniformly transmitted to the inner wall surface of the force application hole position 93, so that the test accuracy is improved.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides an asphalt concrete and cement concrete bonding strength testing arrangement which characterized in that: comprises a machine table (1), a lifting component (2) and a clamping component (3); the lifting assembly (2) is arranged above the clamping assembly (3) in a lifting mode; the clamping assembly (3) comprises a leaning seat (31) and a telescopic piece (32); the moving path of the telescopic piece (32) corresponds to the position of the leaning seat (31); an accommodating groove (311) is formed in the center of one side, facing the telescopic piece (32), of the leaning seat (31); a cushion block (312) is embedded in the accommodating groove (311); the projection of the movable end of the telescopic piece (32) in the self movement direction is positioned in the containing groove (311); and a hoop (301) is arranged above the accommodating groove (311).

2. The asphalt concrete and cement concrete bonding strength testing device according to claim 1, characterized in that: the machine table (1) comprises a base (11); the top of the base (11) is provided with a chute (12); the leaning seat (31) is in sliding fit with the sliding groove (12).

3. The asphalt concrete and cement concrete bonding strength testing device according to claim 2, characterized in that: the length direction of the sliding chute (12) is vertical to the movement direction of the telescopic piece (32).

4. The asphalt concrete and cement concrete bonding strength testing device according to claim 2, characterized in that: the machine table (1) further comprises a top plate (13); the top plate (13) is positioned above the base (11); the lifting assembly (2) comprises a hydraulic telescopic rod (21), an assembly part (22) and a cylindrical body (23); the hydraulic telescopic rod (21) is vertically arranged; the hydraulic telescopic rod (21) is connected with the top plate (13); the assembly part (22) is connected with the movable end of the hydraulic telescopic rod (21); the cylindrical body (23) is inserted at the upper end of the test sample piece (9); a first hole position (221) and a second hole position (222) are arranged on the assembly part (22); a first pull rope (223) penetrates through the first hole (221); a second pull rope (224) penetrates through the second hole (222); the first pull rope (223) and the second pull rope (224) are respectively connected with two ends of the cylindrical body (23).

5. The asphalt concrete and cement concrete bonding strength testing device according to claim 4, characterized in that: the first hole sites (221) and the second hole sites (222) are arranged at intervals along the vertical direction.

6. The asphalt concrete and cement concrete bonding strength testing device according to claim 4, characterized in that: a supporting piece (15) is connected between the top plate (13) and the base (11); the supporting piece (15) comprises a back plate (151) and a reinforcing rib plate (152); the reinforcing rib plate (152) is vertically connected with the back plate (151).

7. The asphalt concrete and cement concrete bonding strength testing device according to claim 6, characterized in that: the reinforcing rib plate (152) is connected with the back plate (151) in a T-shaped welding mode.

8. The asphalt concrete and cement concrete bonding strength testing device according to claim 4, characterized in that: the cylindrical body (23) comprises a core rod (231), a soft sleeve (232) and an annular piece (233); the soft sleeve (232) is fitted and sleeved on the surface of the core rod (231); the annular members (233) are connected in pairs at both ends of the mandrel (231); the first pulling rope (223) and the second pulling rope (224) are respectively connected with the annular piece (233) at the corresponding ends in a penetrating mode.