CN210233408U

CN210233408U - Test mould suitable for cement stabilized macadam

Info

Publication number: CN210233408U
Application number: CN201920425498.4U
Authority: CN
Inventors: Xugang Zhai; 翟旭刚; Bo Chen; 陈博
Original assignee: Shanyang Planning And Design Institute
Current assignee: Shanyang Planning And Design Institute
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-04-03
Anticipated expiration: 2029-03-29

Abstract

The utility model discloses a examination mould suitable for cement stabilization rubble, including centre form, external mold and cushion, centre form and external mold are the drum structure, and the external mold cover is outside at the centre form, and the cushion setting is in the centre form bottom, and the centre form is hollow out construction, by the fixed two halves section of thick bamboo of rubber ring, and there is square bulge in the external mold inboard, and with the tight cooperation of centre form, by the fixed two halves section of thick bamboo of bolt. The utility model can realize demoulding without the help of a demoulding machine, simplifies the operation process and ensures the safety of the test; after the external mold is disassembled, the test piece is maintained by attaching the internal mold, so that the integrity of the test piece can be ensured, and the accuracy of the compressive strength test is improved; the internal mold is made of hard plastic, one external mold can be matched with a plurality of internal molds of the same specification for use, the weight of the test mold is reduced while the manufacturing cost is reduced, and the use is more convenient and faster.

Description

Test mould suitable for cement stabilized macadam

Technical Field

The utility model belongs to the technical field of material laboratory glassware is used to the road, a examination mould suitable for rubble is stabilized to cement is related to.

Background

The semi-rigid base course is widely applied to the construction of all levels of roads in China, and cement stabilized macadam is particularly important in the construction of the roads as one of the materials of the semi-rigid base course. Before the cement stabilized macadam base course is paved, the mix proportion design is usually carried out to meet the requirements of engineering quality. A large number of test pieces are molded in the process of the mix proportion design test, and the static pressure method or the vibration compaction method is mostly adopted for molding in the current indoor test. The prior art has the following problems:

(1) in the test piece forming process, along with the increase of water content, because the test piece has not solidified yet, hardly obtain complete test piece after the drawing of patterns, damage, the deformation in the drawing of patterns all will to a great extent influence the accuracy of test piece compressive strength test.

(2) The test mould that present laboratory adopted mostly is integral steel cylinder test mould, will adopt electronic hydraulic pressure stripper during the drawing of patterns, and not only the process is loaded down with trivial details, has certain danger moreover.

Disclosure of Invention

In order to overcome the defects existing in the prior art, the utility model aims at providing a test mould suitable for cement stabilized macadam.

The utility model discloses a realize through following technical scheme:

a test mould suitable for cement stabilized macadam comprises an inner mould, an outer mould and a cushion block, wherein the inner mould and the outer mould are both of a cylindrical structure, the outer mould is sleeved outside the inner mould, and the cushion block is arranged at the bottom of the inner mould and used for bearing a sample and can move along the axial direction of the inner mould; the wall of the inner die is provided with uniform hollow structures, the inner wall of the outer die is provided with bulges capable of being embedded into the hollow structures, and after the bulges on the outer die are embedded into the hollow structures on the inner die, the inner wall of the test die is a smooth surface;

the inner mold and the outer mold are divided into at least two subsections along the respective circumferential direction, the subsections of the inner mold are detachably connected, and the central angle corresponding to each subsection is not more than 180 degrees; all the subsections of the outer die are detachably connected, and the corresponding central angle of each subsection is not more than 180 degrees.

The both ends of centre form have all seted up annular groove on the outer wall along the circumference of centre form, and the centre form is equipped with the rubber ring that is used for hooping each subsection of centre form in annular groove department cover, and rubber ring cover is behind annular groove, and the rubber ring does not bulge in the surface of centre form.

The tooth-shaped structures are arranged on the sides of all the subsections of the outer die along the axial direction of the outer die, the tooth-shaped structures between two adjacent subsections of the outer die are meshed with each other, the plug pin penetrates through the meshed parts between two adjacent subsections of the outer die along the axial direction of the outer die, and the plug pin is used for connecting the two adjacent subsections of the outer die.

The bolt is provided with a handle capable of pulling out the bolt.

The inner mold and the outer mold are divided into two parts along the respective circumferential directions.

The cushion block and the inner die are in clearance fit.

The joints between the inner mold sections and the joints between the outer mold sections are staggered.

The inner mold is made of hard plastics, and the outer mold is made of steel.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model discloses a test mould suitable for cement stabilization rubble wholly sets up to the bilayer structure of centre form and external mold, and centre form and external mold divide into two at least subsections along respective circumference, can dismantle the connection between the subsection of centre form, only need take apart centre form and external mold when the drawing of patterns, can realize the drawing of patterns of test piece, therefore the utility model discloses a test mould can not realize the drawing of patterns with the help of the stripper, has simplified operation process, has ensured experimental safety; because the cylinder wall of the inner mold is set to be a uniform hollow structure, when the test piece is maintained, the outer mold is firstly disassembled, and then the test piece is maintained with the inner mold, so that on one hand, the integrity of the test piece can be ensured, the accuracy of the compressive strength test is improved, on the other hand, the hollow structure can provide a ventilating and water-permeable channel for the test piece during maintenance, the hollow structure does not influence the normal maintenance of the test piece, and the maintenance effect of the test piece can be ensured; and after the test piece is cured, detaching the inner die to realize the demoulding of the test piece.

Furthermore, the joints between the inner mold and the outer mold are staggered, so that the shape of the whole test mold can be ensured, and the shape of a test piece can be ensured in the process of manufacturing the test piece.

Furthermore, the inner die is made of hard plastics, the outer die is made of steel, the manufacturing cost is reduced, the weight of the test die is reduced, and the use is more convenient and rapid.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal mold of the present invention;

FIG. 3 is a schematic view of the outer mold of the present invention;

FIG. 4 is an exploded view of the outer mold of the present invention;

FIG. 5 is a schematic top view of the spacer of the present invention;

fig. 6 is a schematic bottom view of the cushion block of the present invention.

Wherein, 1 is an inner mould, 11 is an annular groove, and 12 is a rubber ring; 2, an outer die, 21, 22, 23, 24 and a bolt, wherein the outer die is of a tooth-shaped structure, 22 is a square bulge, 23 is a longitudinal round hole and 24 is a bolt; and 3 is a cushion block.

Detailed Description

The invention is described in further detail below with reference to the following figures and examples:

in the present invention, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means that the terms are defined with reference to the drawing plane of the corresponding drawing, and "inner" and "outer" mean that the terms are inner and outer relative to the outline of the corresponding part.

As shown in figure 1, the utility model discloses a examination mould suitable for rubble is stabilized to cement, including centre form 1, external mold 2 and cushion 3, centre form and external mold are the drum structure, and external mold 2 covers is outside at centre form 1, and cushion 3 is installed in centre form 1 bottom for accept the sample and can follow the axial displacement of centre form 1. The outer mold 2 is tightly buckled on the inner mold 1, the wall of the inner mold 1 is set to be an even hollow structure, the hollow structure adopts square holes which are arranged in an array, the inner wall of the outer mold 2 is provided with protrusions which can be embedded into the hollow parts on the inner mold, the protrusions are square protrusions 22 matched with the square holes, the square protrusions 22 can be tightly matched with the square holes, and the inner wall and the outer wall of the whole test mold are of a cylindrical structure with smooth curved surfaces. The 1 manufacturing material of centre form is rigid plastic, and outer mould 2 manufacturing material is steel, and when the test piece shaping, an outer mould can use with a plurality of centre forms cooperations of the same specification, when the test piece maintenance, pulls down the outer mould, and the test piece is maintained with the centre form simultaneously, can use this outer mould to cooperate the use again with other centre forms with the specification this moment and be used for making a mould, can accelerate the moulding rhythm, and save time has reduced manufacturing cost when convenient experimental.

As shown in fig. 2, annular grooves 11 are reserved at the top and the bottom of the inner mold 1, the inner mold 1 is composed of two half cylinders, a rubber ring 12 is sleeved in the annular groove 11 of the inner mold 1, the diameter of the rubber ring 12 is smaller than the depth of the annular groove 11, and the two half cylinders are fixedly connected into a whole by the rubber ring 12 to form the complete inner mold 1.

As shown in fig. 3 and 4, the outer side of the cylinder of the outer mold 2 is a smooth curved surface, the outer mold 2 is composed of two half cylinders, the joint of the two half cylinders is provided with a tooth-shaped structure 21, the tooth-shaped structures 21 at the joint of the two half cylinders are engaged with each other in a matching manner, the engaged part is provided with a longitudinal round hole 23, a bolt 24 is inserted into the longitudinal round hole 23 in a matching manner, and the two half cylinders are fixedly connected by the bolt 24 to form the complete outer mold 2. A handle is arranged on the bolt 24, and the outer die 2 can be separated when the bolt 24 is pulled out.

The seam crossing of two half barrel of centre form 1 and the seam crossing of two half barrel of external mold 2 are 90 staggers, and the effect through bolt 24 and centre form fretwork and the inboard square bulge 22's of external mold complex effect make the examination mould structure more firm, can resist the lateral pressure among the test piece forming process.

The test piece is demoulded by pulling out the bolt 24 and taking down the rubber ring 12, so that the demoulding of a demoulding machine is avoided, the demoulding process can be simplified, and the experimental safety can be guaranteed. When the cement stabilized macadam test piece is manufactured, only the outer mold 2 is taken down, the inner mold 1 and the test piece are placed into a curing box together for curing, and the crushing and deformation of the pre-formed test piece can be avoided.

As shown in fig. 5 and 6, the cushion block 3 of the present invention is circular, and the diameter of the cushion block 3 is slightly smaller than the inner diameter of the test mold, so that the cushion block can move radially in the inner mold.

As the preferred embodiment of the present invention, the inner mold 1 and the outer mold 2 of the present invention are 210mm in height, the inner diameter of the inner mold 1 is 150mm, the total thickness of the inner mold 1 and the outer mold 2 is 10mm, the thickness of the cushion block 3 is 30mm, and the length of the bolt 4 is equal to the height of the inner mold 1 and the outer mold 2. The utility model discloses a test mould can hit real appearance, heavy test equipment cooperation such as real appearance of hitting with current commonly used vibration and use.

Claims

1. A test mould suitable for cement stabilized macadam is characterized by comprising an inner mould (1), an outer mould (2) and a cushion block (3), wherein the inner mould (1) and the outer mould (2) are both of a cylindrical structure, and the outer mould (2) is sleeved outside the inner mould (1); the cushion block (3) is arranged at the bottom of the inner die (1) and is used for bearing a sample and can move along the axial direction of the inner die (1); the wall of the inner mold (1) is provided with uniform hollow structures, the inner wall of the outer mold (2) is provided with bulges capable of being embedded into the hollow structures, and after the bulges on the outer mold (2) are embedded into the hollow structures on the inner mold (1), the inner wall of the test mold is a smooth surface;

the inner mold (1) and the outer mold (2) are divided into at least two subsections along the respective circumferential direction, the subsections of the inner mold (1) are detachably connected, and the central angle corresponding to each subsection is not more than 180 degrees; all the subsections of the outer die (2) are detachably connected, and the corresponding central angle of each subsection is not more than 180 degrees.

2. The test mould suitable for cement stabilized macadam according to claim 1, characterized in that, the both ends of the inner mould (1) have annular grooves (11) along the circumference of the inner mould (1) on the outer wall, the inner mould (1) is sleeved with a rubber ring (12) for hooping each subsection of the inner mould (1) at the annular groove (11), the rubber ring (12) is sleeved at the back of the annular groove (11), and the rubber ring (12) does not protrude out of the outer surface of the inner mould (1).

3. A trial mould for cement stabilized macadam according to claim 1 wherein each subsection of the outer mould (2) is provided with a castellated formation (21) at the edge in the axial direction of the outer mould (2), the castellated formations (21) between two adjacent subsections of the outer mould (2) meshing with each other, a pin (24) extending through the meshing between two adjacent subsections of the outer mould (2) in the axial direction of the outer mould (2), the pin (24) serving to connect the two adjacent subsections of the outer mould (2).

4. A test mould suitable for cement stabilized macadam according to claim 3 wherein said plug (24) is provided with a handle to enable the plug (24) to be pulled out.

5. A test mould suitable for cement stabilized macadam according to claim 1 wherein the inner mould (1) and the outer mould (2) are each divided into two parts along their respective circumferential directions.

6. A test mould suitable for cement stabilized macadam according to claim 1 wherein there is a clearance fit between the spacer (3) and the inner mould (1).

7. A test mould suitable for cement stabilized macadam according to claim 1 wherein the joints between the sections of the inner mould (1) and the joints between the sections of the outer mould (2) are offset.

8. A test mould suitable for cement stabilized macadam according to claim 1, characterized in that the material of the inner mould (1) is rigid plastic and the material of the outer mould (2) is steel.