CN206450580U - A kind of shearing frame for being used to detect Building Adhesive adhesion strength - Google Patents

Abstract

The utility model relates to a shearing frame used for detecting the bonding strength of building adhesives. The building adhesives are used for bonding between concrete autoclaved aerated blocks. The shearing frame includes a bottom plate and is movable on the bottom plate. The slide plate, the first bump set at one end of the bottom plate, the slide plate includes the second bump set at one end, the first bump and the second bump form a clamping part, clamping two pieces of concrete autoclaved in a bonded state Air block; the first bump includes a first vertical surface on one side of the clamping portion, the second bump includes a second vertical surface on one side of the clamping portion, the first vertical surface is parallel to and cooperates with the second vertical surface, The shear frame includes two mutually parallel and matched vertical surfaces. When clamping two concrete autoclaved aerated blocks in a bonded state, the clamping part can be adjusted according to the size of the autoclaved aerated block, so that the clamping is more accurate. It is firm, and can ensure that when the shear force is detected in the vertical direction, the force in the horizontal direction is balanced, and has no effect on the shear force in the vertical direction.

Description

A shearing frame for testing the bond strength of construction adhesives

technical field

The utility model belongs to the field of building adhesives, in particular to a shear frame used for testing the bonding strength of building adhesives.

Background technique

Concrete autoclaved aerated blocks often need to use construction adhesives for bonding and splicing, so the strength of construction adhesives is crucial to the firmness of buildings.

According to the provisions of JC 890-2001 "Masonry Mortar and Plastering Mortar for Autoclaved Aerated Concrete", 6.2.4 Bond Strength Test, "After the bond strength test is cured, the actual shear area of the specimen is measured with a steel ruler. Put the test piece on a press equipped with a shear frame, and the loading speed of the press should be controlled within the range of (50±5) N/s, until the test piece is sheared and broken, and the bond strength is measured.”

However, there is no clear regulation in the standard JC 890-2001 for the shear frame used in the test in the industry at present, and there is no standard structure in the industry. After trial and error, we found that it is difficult for the shear racks currently used in the industry to maintain a complete balance in the horizontal direction. The imbalance in the horizontal direction will affect the detection of the shear force in the vertical direction, that is, the detection accuracy of the bonding strength.

Utility model content

The technical problem to be solved by the utility model is to provide a shear frame for testing the bonding strength of construction adhesives, which can maintain balance in the horizontal direction, so that the detected concrete autoclaved aerated block can only be tested in the vertical direction. The shear force is received in the direction, thereby improving the detection accuracy of the shear strength of the adhesive.

In order to solve the above problems, the utility model provides a shear frame for detecting the bonding strength of the adhesive, the construction adhesive is used for bonding between concrete autoclaved aerated blocks, and the shear frame It includes a base plate, a slide plate movably arranged on the base plate, and a first projection provided at one end of the base plate, and the slide plate includes a second projection provided at one end thereof, the first projection and the first projection The two protrusions cooperate to form a clamping part, which clamps two concrete autoclaved aerated blocks in a bonded state.

In addition, the utility model also provides the following subsidiary technical solutions:

The first protrusion includes a first vertical surface on one side of the clamping portion, the second protrusion includes a second vertical surface on one side of the clamping portion, and the first vertical surface is in contact with the clamping portion. The second vertical plane is parallel and arranged in cooperation.

The shearing frame also includes a positioning piece vertically passed through the slide plate, and the positioning piece cooperates with the bottom plate to fix the slide plate.

The bottom plate includes slide rails arranged on both sides thereof, the slide plate includes slide grooves arranged on both sides thereof, and the slide rails are arranged in cooperation with the slide grooves.

The shear frame is arranged in cooperation with a press, and the press is used for testing the bonding strength of the adhesive used for the concrete autoclaved aerated block.

The beneficial effects of the utility model:

The utility model provides a shear frame for testing the bonding strength of construction adhesives, wherein the construction adhesive is used for bonding between concrete autoclaved aerated blocks, and the shear frame includes a bottom plate, a movable device The slide plate on the bottom plate and the first bump on one end of the bottom plate, the slide plate includes a second bump on one end, the first bump cooperates with the second bump to form a clamping part, and clamps two adhesive The concrete autoclaved aerated block in the state; the first bump includes a first vertical surface on one side of the clamping part, the second bump includes a second vertical surface on one side of the clamping part, and the first vertical surface and the second Compared with the prior art, the vertical planes are parallel and cooperating, and have the following advantages: the clamping part for clamping two concrete autoclaved aerated blocks in a bonded state has two mutually parallel and cooperating vertical planes, thus, When clamping two concrete autoclaved aerated blocks in a bonded state, the clamping part can be adjusted according to the size of the autoclaved aerated block, which not only makes the clamping firmer, but also ensures that the shearing force in the vertical direction When testing, the force in the horizontal direction is balanced, and it does not have any influence on the shear force in the vertical direction.

Description of drawings

Fig. 1 is a top view of a shearing frame used for testing the bonding strength of construction adhesives in an embodiment of the present invention.

Fig. 2 is a schematic diagram of a shear frame used to detect the bond strength of construction adhesives in an embodiment of the present invention when performing a bond strength test.

detailed description:

Embodiment: The utility model provides a shear frame for testing the bonding strength of construction adhesives, wherein the construction adhesives are used for bonding between concrete autoclaved aerated blocks. The embodiment will be further described in detail below in conjunction with the accompanying drawings.

As shown in FIG. 1 , the shear frame provided by this embodiment generally includes a bottom plate 1 and a slide plate 2 movably arranged on the bottom plate 1 . Both the base plate 1 and the slide plate 2 are preferably rectangular, and the base plate 1 is required to have a flat lower bottom surface, so as to be stably placed on the pressure testing position of the press. The shearing frame also includes a first protrusion 11 arranged at one end of the bottom plate 1, and a second protrusion 21 arranged at one end of the slide plate 2, the first protrusion 11 cooperates with the second protrusion 21 to form a clamping portion 3, and Two concrete autoclaved aerated blocks in a bonded state are used for detection.

Wherein, the first bump 11 includes a first vertical surface 111 on one side of the clamping portion 3, the second bump 21 includes a second vertical surface 211 on one side of the clamping portion 3, and the first vertical surface 111 is connected to the second vertical surface 111. The vertical planes 211 are parallel and matched with each other. In this way, when the slide plate 2 slides so that the clamping part 3 clamps two bonded concrete autoclaved aerated blocks for detection, not only can the clamping part 3 be adjusted according to the size of the autoclaved aerated block, so that The clamping is firmer, and it can ensure that when the shear force is detected in the vertical direction, the force in the horizontal direction is balanced, and has no effect on the shear force in the vertical direction.

Continuing to refer to FIG. 1 , the shearing frame further includes a positioning piece 4 vertically pierced on the slide plate 2 , and the positioning piece 4 cooperates with the bottom plate 1 to fix the slide plate 2 . In this embodiment, the positioning member 4 is preferably a screw 4 . When the slide plate 2 slides to the corresponding position and needs to be fixed, it is only necessary to unscrew the screw 4 so that the lower end thereof can be pressed against the base plate 1 .

In order to enable the slide plate 2 to slide relative to the base plate 1 , a preferred manner is to provide slide rails 12 on the base plate 1 , and to arrange on both edges of the surface of the slide rails 12 in pairs. Correspondingly, the lower surface of the slide plate 2 is also provided with slide grooves located on both sides thereof, and the slide rails are set in cooperation with the slide grooves.

As shown in Figure 2, during specific use, the shear frame is set in cooperation with a press, and the press is used to detect the bonding strength of the adhesive used for the concrete autoclaved aerated block.

According to the provisions of JC 890-2001 "Masonry Mortar and Plastering Mortar for Autoclaved Aerated Concrete", the concrete autoclaved aerated block is firstly made, and then the two concrete autoclaved aerated blocks are filled with construction adhesive Adhesive cement mortar or gypsum mortar can be bonded into concrete autoclaved aerated blocks and maintained. In particular, when two concrete autoclaved aerated blocks are bonded together, the upper and lower ends should be staggered by 10mm. After curing, use a steel ruler to measure the actual shear area M of the specimen, and place the concrete autoclaved aerated blocks on a press equipped with a shear frame. The loading speed of the press should be controlled at (50±5)N/s Within the range, until the specimen shear failure, determine the bond strength.

In this embodiment, as shown in FIG. 2 , the vertical height between the upper concrete autoclaved aerated block 5 and the lower concrete autoclaved aerated block 6 is 10mm, and the cement mortar 7 with construction adhesive is between them. The concrete autoclaved aerated block is fixed in the opposite clamping part 3 and clamped and fixed after being fixed by screws 4 . Then, the pressure head of the press presses down, the cement mortar 7 added with construction adhesive is destroyed and broken, the upper concrete autoclaved air block 5 falls, and the pressure value is read, which corresponds to the strength under the shear area M is the bond strength.

The above is a preferred embodiment of the present utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, some improvements and modifications can also be made, these improvements and modifications It is also regarded as the protection scope of the present utility model.

Claims (5)

1. a kind of shearing frame for being used to detect Building Adhesive adhesion strength, it is steam pressurized that the Building Adhesive is used for concrete Bonding between block, it is characterised in that：The shearing frame includes bottom plate, the slide plate being movably arranged on the bottom plate and is located at First projection of described bottom plate one end, the slide plate includes the second projection located at its one end, first projection and described the Two projections cooperatively form clamping part, clamp the concrete autoclaved aerated block of two pieces of tacky states.

2. a kind of shearing frame for being used to detect Building Adhesive adhesion strength according to claim 1, it is characterised in that：Institute Stating the first projection includes the first vertical plane positioned at the clamping part side, and second projection includes being located at the clamping part one Second vertical plane of side, first vertical plane is parallel with second vertical plane and is equipped with.

3. a kind of shearing frame for being used to detect Building Adhesive adhesion strength according to claim 1, it is characterised in that：Institute The keeper that shearing frame also includes vertically being located on the slide plate is stated, the keeper coordinates to the slide plate with the bottom plate It is fixed.

4. a kind of shearing frame for being used to detect Building Adhesive adhesion strength according to claim 1, it is characterised in that：Institute Stating bottom plate includes the slide rail located at its both sides, and the slide plate includes the chute located at its both sides, and the slide rail is matched somebody with somebody with the chute Close and set.

5. a kind of shearing frame for being used to detect Building Adhesive adhesion strength according to claim 1, it is characterised in that：Institute State shearing frame to be equipped with forcing press, the forcing press is used to detect that the bonding of concrete autoclaved aerated block adhesive is strong Degree.