CN219245147U - Road crack pouring adhesive low-temperature tensile experiment sample preparation die - Google Patents

Abstract

The utility model discloses a low-temperature tensile test sample preparation die for a road joint filling adhesive, which is characterized in that: comprising the following steps: the device comprises a bottom plate, upright posts, an upper plate, side plates and positioning bolts; the two upright posts are respectively arranged on two opposite sides of the upper surface of the bottom plate, and a forming space for the pouring sealant is formed between the upright posts; a long hole is formed in the middle of the upper plate, and the upper end of the upright post passes through the long hole and is respectively propped against the two ends of the long hole; the side plates are respectively arranged on two opposite sides of the bottom plate, which are not provided with the upright posts, the side plates are fixed with the bottom plate through fasteners, and a space for accommodating the concrete blocks is formed among the upright posts, the bottom plate and the side plates; the side plates form positioning holes along the thickness direction, threads matched with the positioning bolts are arranged in the positioning holes, and the positioning bolts penetrate through the side plates and are propped against the concrete blocks. The utility model firmly fixes the concrete block, is convenient for molding, fixes the upright post and improves the dimensional accuracy of the test piece.

Description

Road crack pouring adhesive low-temperature tensile experiment sample preparation die

Technical Field

The utility model relates to the field of municipal road material detection, in particular to a road crack pouring adhesive low-temperature stretching experiment sample preparation die.

Background

Asphalt pavement cracks are one of the most common diseases of asphalt pavement in early stage, and when the cracks of the asphalt pavement cannot be repaired in time, the service life and the driving comfort of the pavement are greatly influenced. It mainly shows the following aspects: the service life of the road surface is shortened, along with the expansion and deepening of cracks, the cracks can be gradually expanded and deepened, rainwater can infiltrate into the road bed along with the cracks, the bearing capacity of the road is affected, the phenomena of scouring and pumping are generated under the action of a large amount of driving loads, and the damage of the road surface is aggravated; if the longitudinal and transverse cracks cannot be repaired in time, the longitudinal and transverse cracks can be quickly developed into network cracks, looseness or pit grooves, so that pavement diseases are caused, and the comprehensive service level of the asphalt pavement is seriously affected. Therefore, it is necessary to timely supplement the cracks with crack pouring glue during road maintenance. The joint filling glue is of different types, one of which is the joint filling glue regulated by JT/T740-2009, pavement rubber asphalt joint filling glue, according to the standards of the traffic industry of the people's republic of China.

According to the technical requirements of the specifications, the joint filling glue has basic performances such as binding force, elasticity and the like, and has specified performance parameters at high temperature and low temperature, therefore, a low-temperature tensile experiment mode aiming at the joint filling glue is specified in the specifications, wherein after a concrete block is put into a low-temperature tensile experiment mould, pouring the joint filling glue to form a tensile test piece is a necessary process for carrying out subsequent experiments, and whether the size meeting the specification requirements after the test piece is molded is a key whether an experiment result accords with actual performance.

The existing low-temperature stretching experiment mould structurally comprises an upper cushion block, a lower cushion block and an upright post according to a schematic diagram in the specification, and has the following defects in use: 1. when the joint filling glue is filled, pushing the concrete blocks at two sides to shift, and making the mould difficult; 2. the stand lacks the restraint along the length direction of mould, makes its displacement lead to pouring into the volume of seam filling glue to become great, makes the size of the tensile test piece of final shaping and specification inconsistent, influences the accuracy of experimental result.

Disclosure of Invention

The present utility model aims to solve at least to some extent one of the technical problems in the above-described technology. Therefore, the utility model aims to provide a sample preparation mould for a road crack pouring adhesive low-temperature stretching experiment, which is used for firmly fixing a concrete block, facilitating mould making, fixing a stand column and improving the dimensional accuracy of a test piece.

In order to achieve the above purpose, the embodiment of the utility model provides a low-temperature tensile test sample preparation die for a road joint filling adhesive, which comprises a bottom plate, upright posts, an upper plate, side plates and positioning bolts; the two stand columns are respectively arranged on two opposite sides of the upper surface of the bottom plate, and a forming space for pouring joint glue is formed between the stand columns; a long hole is formed in the middle of the upper plate, and the upper end of the upright post passes through the long hole and is respectively propped against the two ends of the long hole; the side plates are respectively arranged on two opposite sides of the bottom plate, where the two opposite sides of the upright post are not arranged, the side plates are fixed with the bottom plate through fasteners, and a space for accommodating concrete blocks is formed among the upright post, the bottom plate and the side plates; the side plates form positioning holes along the thickness direction, threads matched with the positioning bolts are arranged in the positioning holes, and the positioning bolts penetrate through the side plates and are propped against the concrete blocks.

According to the road joint filling glue low-temperature stretching experiment sample preparation mould, the stand column is restrained by the long hole of the upper plate and does not incline outwards, so that the joint filling glue in the forming space is stable in forming size and keeps accuracy; the space of holding concrete block that stand, upper plate, bottom plate and curb plate constitute, the positioning bolt on the curb plate supports the concrete block, makes it paste tight stand, makes things convenient for the system mould.

In addition, the low-temperature tensile test sample preparation die for the road joint filling glue provided by the embodiment of the utility model can also have the following additional technical characteristics:

optionally, the upright is connected with the bottom plate through a fastener, and the fastener penetrates through the bottom plate to be matched with a mounting hole formed along the length direction of the upright, so that the upright is perpendicular to the bottom plate.

Optionally, the upright post is cuboid.

Optionally, the number of the positioning holes is at least four, and the positioning holes are arranged on the side plates in a pairwise opposite manner; the positioning bolts are arranged in the positioning holes in a one-to-one correspondence mode.

Drawings

FIG. 1 is a block diagram according to one embodiment of the utility model;

FIG. 2 is a front view of an embodiment according to the present utility model;

FIG. 3 is a side view of one embodiment according to the present utility model;

FIG. 4 is a bottom view of an embodiment according to the present utility model;

fig. 5 is a post-molding exploded view according to one embodiment of the present utility model.

Description of the reference numerals:

column 2 of base plate 1

Long hole 31 of upper plate 3

Positioning hole 41 of side plate 4

Positioning bolt 5 test piece 100.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

The upright post is restrained by the long hole of the upper plate and does not incline outwards, so that the crack pouring glue in the forming space is stable in forming size and keeps accuracy; the space of holding concrete block that stand, upper plate, bottom plate and curb plate constitute, the positioning bolt on the curb plate supports the concrete block, makes it paste tight stand, makes things convenient for the system mould.

In order that the above-described aspects may be better understood, exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.

Fig. 1 to 4 are diagrams showing a low-temperature tensile test sample mold for a road joint compound according to an embodiment of the present utility model, which comprises a bottom plate 1, a column 2, an upper plate 3, a side plate 4 and a positioning bolt 5; the two upright posts 2 are respectively arranged on two opposite sides of the upper surface of the bottom plate 1, and a forming space for the crack pouring glue is formed between the upright posts 2; a long hole 31 is formed in the middle of the upper plate 3, and the upper end of the upright post 2 passes through the long hole 31 and respectively abuts against the two ends of the long hole 31; the side plates 4 are divided into two pairs of edges which are arranged on the bottom plate 1 and are not provided with the upright posts 2, the side plates 4 and the bottom plate 1 are fixed through fasteners, and spaces for accommodating concrete blocks are formed among the upright posts 2, the bottom plate 1 and the side plates 4; the side plate 4 is formed with a positioning hole 41 along the thickness direction, a thread matched with the positioning bolt 5 is arranged in the positioning hole 41, and the positioning bolt 5 passes through the side plate 4 and abuts against the concrete block.

According to the existing molding die manufactured by the third page of the example of fig. 2 in the specification of the JT/T740-2009 "pavement rubber asphalt crack pouring adhesive", a concrete block is placed on a lower cushion block, two concrete blocks are separated by a column, a space surrounded by the concrete block, the column, the lower cushion block and an upper cushion block is poured in, the crack pouring adhesive is adhered to each contacted surface, according to the schematic diagram in the specification, the upper cushion block is pressed on the upper part of the concrete block, the sides of the concrete block and the column are not laterally restrained, the concrete block and the column are extruded in the glue pouring process, the injection amount of the crack pouring adhesive in the space is increased, the final molding size is different from that specified in the specification, in the subsequent stretching experiment, the size of the glue layer can lead to the change of the stretching amount, and the deviation of the low-temperature extension performance evaluation of the crack pouring adhesive is caused. In the embodiment, the upper plate is changed into an integral flat plate with a long hole 31 in the middle to form a hoop which is sleeved outside the two upright posts 2, and the relative distance between the two upright posts 2 is maintained while the downward pressure on the concrete block is maintained; the side plate 4 has the function of providing a fixed support for the positioning bolt 5, in the embodiment, the side plate 4, the bottom plate 1 and the upright posts 2 enclose a concave space for placing concrete blocks, and the positioning bolt 5 is adjusted to tightly prop against the side surface of the concrete blocks so as not to move, thereby further controlling the final forming quality of the glue blocks of the crack pouring glue, and holes are also formed between the upright posts 2 in the middle of the bottom plate 1, so that glue solution can better fill gaps between the concrete blocks, and the occurrence probability of cavities is reduced.

When the device is used, the bottom plate 1, the upright posts 2 and the side plates 4 are combined together, and for the convenience of demoulding, the contact surfaces among the upright posts 2, the upper plate 3, the bottom plate 1 and the pouring sealant are required to be coated with a release agent in advance so as to reduce the adhesion of the pouring sealant and the parts and facilitate demoulding; then placing concrete blocks in the space between the upright posts 2 and the side plates 4, screwing the positioning bolts 5 into the side plates 4 until the positioning bolts are abutted against the concrete blocks, finally, hooping the two upright posts 2 in the long holes 31 by the upper plate 3, pressing the concrete blocks from the upper part, pouring crack pouring glue into the crack between the two upright posts 2 in the long holes 31, and taking out the sample after the crack pouring glue is solidified according to the process.

Alternatively, the upright 2 is connected to the base plate 1 by a fastener, which passes through the base plate 1 to be fitted into a mounting hole formed in the longitudinal direction of the upright 2, so as to connect the upright 2 perpendicular to the base plate 1. Alternatively, the upright 2 is rectangular. Optionally, at least four positioning holes 41 are arranged on the side plate 4 in a pairwise opposite manner; the positioning bolts 5 are arranged in the positioning holes 41 in a one-to-one correspondence.

In some embodiments, the column 2 may be detachably mounted to the base plate 1 by fasteners, and the column 2 may be detached from the base plate 1 when necessary, so that the test piece 100 is easily detached from the mold.

Fig. 5 is a sample mold for low-temperature stretching experiments of the road joint compound according to the present embodiment, and when the test piece 100 is taken out from the present embodiment, the middle glue layer and the concrete blocks on both sides are in an "i" shape, so that the above-mentioned embodiments are aimed at making the molding shape of the middle glue layer more stable and also more convenient for demolding.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms should not be understood as necessarily being directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (4)

1. A road crack pouring adhesive low temperature tensile test system appearance mould, its characterized in that: comprising the following steps: the device comprises a bottom plate, upright posts, an upper plate, side plates and positioning bolts; the two stand columns are respectively arranged on two opposite sides of the upper surface of the bottom plate, and a forming space for pouring joint glue is formed between the stand columns; a long hole is formed in the middle of the upper plate, and the upper end of the upright post passes through the long hole and is respectively propped against the two ends of the long hole; the side plates are respectively arranged on two opposite sides of the bottom plate, where the two opposite sides of the upright post are not arranged, the side plates are fixed with the bottom plate through fasteners, and a space for accommodating concrete blocks is formed among the upright post, the bottom plate and the side plates; the side plates form positioning holes along the thickness direction, threads matched with the positioning bolts are arranged in the positioning holes, and the positioning bolts penetrate through the side plates and are propped against the concrete blocks.

2. The road joint compound low-temperature stretching experiment sample preparation die as set forth in claim 1, wherein: the stand with the bottom plate passes through the fastener to be connected, and the fastener passes the bottom plate with the stand is along the mounting hole cooperation that length direction formed, will the stand perpendicular to the bottom plate is connected.

3. The road joint compound low-temperature stretching experiment sample preparation die as set forth in claim 1, wherein: the upright post is cuboid.

4. The road joint compound low-temperature stretching experiment sample preparation die as set forth in claim 1, wherein: the positioning holes are at least four, and are oppositely arranged on the side plates in pairs; the positioning bolts are arranged in the positioning holes in a one-to-one correspondence mode.

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