CN210166201U

CN210166201U - Device for manufacturing cement paste test piece

Info

Publication number: CN210166201U
Application number: CN201920874857.4U
Authority: CN
Inventors: 王孟波; 明维; 张芳芳; 王树峰; 张日红
Original assignee: Ningbo Zhong Chun Hi Tech Ltd By Share Ltd
Current assignee: Ningbo Zhong Chun Hi Tech Ltd By Share Ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-03-20
Anticipated expiration: 2029-06-12

Abstract

The utility model discloses a device for manufacturing cement slurry test pieces, which comprises a rectangular bottom die with an upper opening, wherein two clapboards are integrally formed in the cavity of the bottom die at equal intervals along the length direction, and the cavity of the bottom die is divided into three test piece die cavities which are independent from each other by the two clapboards to form a triple test die with the bottom; each test piece die cavity is a regular cubic die cavity with the same size, and the center of the bottom surface of each test piece die cavity is provided with an air inlet hole for connecting an air pipe; the upper opening of the bottom die is detachably and hermetically connected with an upper die, the length and width of the inner cavity of the upper die are consistent with those of the cavity of the bottom die, and the height of the inner cavity of the upper die is at least 1/2 of the height of the die cavity of the test piece. By adopting the device, a cement slurry test piece can be formed by one-time pouring, secondary slurry supplement is not needed, secondary treatment is not needed after the test piece is cured, the use method is simple and convenient, the operation is convenient, and the test piece manufacturing cost is low.

Description

Device for manufacturing cement paste test piece

Technical Field

The utility model relates to a preparation technique of grout test piece, especially a device for making grout test piece.

Background

The grouting technology is a simple, economic and effective geotechnical engineering reinforcing and water plugging method, and is widely applied to construction engineering in various fields such as buildings, water conservancy and hydropower, traffic, mines and the like. The cement grouting technique plays the most important role in foundation engineering, and is widely used in various construction methods, such as static drilling root planting construction method, SMW construction method, cement mixing pile construction method, and the like. In the construction process of foundation engineering, the prepared cement paste is injected into pores of a soil body and combined with the soil body to generate a physicochemical reaction, so that the strength of the soil body is improved, and the aim of improving the bearing capacity of the foundation is fulfilled. The performance of grouting slurry (especially the mechanical performance of grouting slurry) plays an extremely important role in foundation engineering, and even is the key for determining the grouting effect. Therefore, in the practical application process, the performance and quality of the slurry must be controlled through relevant performance tests and tests.

The methods adopted in the industry at present mainly include two methods: firstly, reference is made to GB/T17671-1999 Cement mortar Strength test method (ISO method), wherein a 40mm x 160mm prism-shaped test piece is adopted; secondly, the method is carried out by referring to JGJ/T70-2009 Standard test method for basic performance of building mortar, and a cubic test piece of 70.7mm multiplied by 70.7mm is adopted. The test mould of the two forming methods is formed by assembling a plurality of cast iron plates or steel plates, the external joint of the test mould is coated with sealing materials such as butter and the like after the assembly is finished, thin-layer machine oil or separant is coated in the test mould, the test piece is conveniently separated from the test mould when the mould is removed, and the mortar is formed immediately after the preparation is finished. In the process of forming by using the method, cement paste with high fluidity and no aggregate flows out from the splicing seams (the sealing effect of butter and the like is poor), and pitted surfaces, holes and the like are easy to appear after the test piece is hardened; moreover, because the cement slurry for grouting in foundation engineering has a large cement-cement ratio, the test piece can secrete a water layer in the standing process, so that the size of the test piece is insufficient, the slurry needs to be continuously replenished in the standing process, the time consumption is long, the operation is troublesome, and the integrity of the test piece is influenced.

The invention with application number of 201510254331.2 provides a method for manufacturing a cement paste test piece by using a bag body, which not only solves the problems of easy leakage and more defects on the surface of the test piece of the existing spliced steel mold, but also has simple and easy operation and low cost. However, the test piece prepared by the method needs secondary treatment such as cutting leveling and the like, the operation is complicated, the requirement on the operation level of an operator is high, the test result is greatly influenced by the treatment condition of the section of the test piece, and the test cost is very high in practical application and almost 10 times higher than that of the two test pieces because the size of the test piece is not a standard test piece.

Disclosure of Invention

The utility model aims to solve the technical problem to above-mentioned prior art current situation, and provide a device for making grout test piece, grout test piece size and the stability of quality through this device preparation are high, and all accord with the testing requirement, and the test piece surface is smooth level and smooth, and the preparation and the detection of test piece are with low costs.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

a device for manufacturing cement slurry test pieces comprises a rectangular bottom die with an upper opening, wherein two partition plates are integrally formed in a cavity of the bottom die at equal intervals along the length direction, and divide the cavity of the bottom die into three test piece die cavities which are independent from each other to form a triple bottom test die; each test piece die cavity is a regular cubic die cavity with the same size, and the center of the bottom surface of each test piece die cavity is provided with an air inlet hole for connecting an air pipe; the upper opening of the bottom die is detachably and hermetically connected with an upper die, the length and width of the inner cavity of the upper die are consistent with those of the cavity of the bottom die, and the height of the inner cavity of the upper die is at least 1/2 of the height of the die cavity of the test piece.

In order to optimize the technical scheme, the specific measures adopted further comprise:

the upper die is a rectangular frame body surrounded by four enclosing plates with the same height, and the four enclosing plates comprise two long-side surface enclosing plates and two wide-side surface enclosing plates.

The upper die is provided with a circle of upper fastening plate on the peripheral surface close to the lower end part, the bottom die is provided with a lower fastening plate on the peripheral surface of the upper open mouth corresponding to the upper fastening plate, and a sealing ring for sealing is pressed between the upper fastening plate and the lower fastening plate.

The sealing ring is an elastic self-expansion non-metal sealing ring.

The bottom die and the upper die are detachably and hermetically connected through fasteners.

The fastening piece is a fastening bolt penetrating through the upper fastening plate and the lower fastening plate, or a spring clip clamping the upper fastening plate and the lower fastening plate.

The bottom die and the upper die are integrally cast by cast iron, cast steel or plastic, and the length, the width and the height of the die cavity of the test piece are all 70.7 mm.

Compared with the prior art, the utility model provides a pair of a device for making grout test piece and application method thereof, the utility model discloses following beneficial effect has: the device of the utility model is simple in structure, the leakproofness is good, and manufacturing cost is economic, adopts this device grout test piece can once only pour the shaping, need not the secondary and supplements the thick liquid, and test piece wholeness is good and size error is very little, also need not to carry out secondary treatment after the test piece solidification, and the application method of this device is simple and convenient, the operation of being convenient for, and the engineering is used conveniently, and the grout test piece of using this method to make is 70.7 mm's standard size, and the detection cost is low.

Drawings

FIG. 1 is a schematic view of the assembly structure of the present invention;

FIG. 2 is a schematic structural view of the upper die of FIG. 1;

FIG. 3 is a cross-sectional structural view of the present invention;

fig. 4 is a schematic perspective view of an upper mold of the present invention;

fig. 5 is a partially enlarged view at i in fig. 3.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

Fig. 1 to 5 are schematic structural views of the present invention.

Wherein the reference numerals are: the device comprises a bottom die 1, a test piece die cavity 1a, a partition plate 11, a lower fastening plate 13, an upper die 2, a long side coaming 21, a wide side coaming 22, an upper fastening plate 23, a sealing ring 3 and a fastening piece 4.

As shown in the figure, the utility model discloses a device for making grout test piece adopts this device can once produce three test piece to the test piece wholeness that produces is good, dimensional error is very little, still need not to carry out secondary treatment. The device comprises a bottom die 1, wherein the bottom die 1 is a long cubic box body with certain height, length and width and is provided with an upper opening. In order to form a plurality of standard cement paste test pieces at one time without cutting, two partition plates 11 are integrally formed in the cavity of the bottom die 1 at equal intervals along the length direction, the cavity of the bottom die 1 is divided into three mutually independent test piece mold cavities 1a for forming the cement paste test pieces by the two partition plates 11, and each test piece mold cavity 1a is a regular cubic mold cavity with the same size, namely the length, width and height of each test piece mold cavity 1a are equal. The bottom die 1 forms a triple belt bottom test die. Thereby make this device can three standard grout test pieces of one shot forming. In order to ensure that the molded cement paste test piece can be smoothly demoulded and keep the integrity and the experimentability of the cement paste test piece, the bottom plate of the bottom die 1 is provided with an air inlet hole at the center of the bottom surface of each test piece die cavity 1 a. Therefore, the cement paste test piece can be pushed out of the test piece die cavity 1a through the air inlet by using the air pump when the die is removed. An upper die 2 is detachably connected to the upper opening of the bottom die 1, and the upper die 2 is connected with the bottom die 1 in a sealing mode, so that cement paste can be prevented from leaking outwards. The length and width dimensions of the cavity of the upper mold 2 correspond to those of the cavity of the bottom mold 1, and the height of the cavity of the upper mold 2 is at least 1/2 of the height of the test piece cavity 1 a.

By the utility model discloses a can see with fig. 2, go up mould 2 for the rectangle framework that is enclosed by four bounding walls that highly the same, go up mould 2 and have rectangular last mouthful and rectangular end opening, its end opening can correspond with the last open mouth of die block 1 and be connected. The four coamings comprise two long-side coamings 21 and two wide-side coamings 22. The four enclosing plates can be formed into a whole by welding and the like, and an integrally formed part is of course the best.

In the embodiment, the upper die 2 is formed with an upper fastening plate 23 on the outer peripheral surface near the lower end portion, i.e., the lower opening, and the upper fastening plate 23 extends in one turn along the entire periphery of the upper die 2. The bottom die 1 is provided with a lower fastening plate 13 formed on the outer peripheral surface of the upper open opening corresponding to the upper fastening plate 23, and a sealing cavity groove is formed between the upper fastening plate 23 and the lower fastening plate 13 which are matched with each other, and a sealing ring 3 for sealing is arranged in the sealing cavity groove. The sealing ring 3 can prevent cement slurry from leaking from the joint of the bottom die 1 and the upper die 2 under the clamping force of the upper fastening plate 23 and the lower fastening plate 13.

The sealing ring 3 is an elastic self-expansion non-metal sealing ring. The sealing ring 3 has certain elasticity and can be restored after the clamping force disappears.

In the embodiment, the bottom mold 1 and the upper mold 2 are detachably and hermetically connected by a fastener 4. The fastening member 4 may be a fastening bolt or a spring clip. When fastening bolts are used, the upper fastening plate 23 and the lower fastening plate 13 are both processed with unthreaded holes, and the fastening bolts pass through the unthreaded holes and fixedly connect the bottom die 1 and the upper die 2 by nuts. When the spring clip is used, the upper fastening plate 23 and the lower fastening plate 13 may be directly held by the elastic force of the spring clip.

In the embodiment, the bottom mold 1 and the upper mold 2 are integrally cast from cast iron, cast steel or plastic, but it is preferable that the bottom mold 1 and the upper mold 2 are integrally cast from plastic. The bottom die 1 and the upper die 2 formed by plastic are low in price, and the detection cost can be effectively reduced. The utility model discloses length, width, the high size of test piece die cavity 1a are 70.7 mm. The cement paste test piece molded by the device is a standard size test piece of 70.7mm multiplied by 70.7 mm.

In order to ensure that the surface of the cement paste test piece is smooth and flat, the flatness of the inner surfaces of the bottom die 1 and the upper die 2 is not more than 0.05mm per 100 mm.

While the preferred embodiments of the present invention have been illustrated, various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention.

Claims

1. A device for making grout test piece, includes rectangular die block (1) that has upper opening mouth, characterized by: two partition plates (11) are integrally formed in the cavity of the bottom die (1) at equal intervals along the length direction, and the cavity of the bottom die (1) is divided into three independent test piece die cavities (1a) by the two partition plates (11) to form a triple belt bottom test die; each test piece die cavity (1a) is a regular cubic die cavity with the same size, and the center of the bottom surface of each test piece die cavity (1a) is provided with an air inlet hole for connecting an air pipe; the last open mouth of die block (1) can dismantle sealing connection have last mould (2), the length and width size of the inner chamber of last mould (2) be unanimous with the length and width size of the cavity of die block (1), the height of last mould (2) inner chamber be 1/2 of test piece die cavity (1a) height at least.

2. The apparatus of claim 1, wherein the apparatus further comprises: the upper die (2) is a rectangular frame body surrounded by four enclosing plates with the same height, and the four enclosing plates comprise two long-side enclosing plates (21) and two wide-side enclosing plates (22).

3. The apparatus of claim 2, wherein the apparatus further comprises: go up mould (2) the shaping has round upper fastening plate (23) on the outer peripheral face near lower tip, die block (1) at last open-ended outer peripheral face and upper fastening plate (23) corresponding shaping have lower fastening plate (13), upper fastening plate (23) and lower fastening plate (13) between the pressure equipment have sealing washer (3) of playing the sealing effect.

4. A device for making cement slurry test pieces as claimed in claim 3, wherein: the sealing ring (3) is an elastic self-expansion non-metal sealing ring.

5. An apparatus for making cement slurry specimens as defined in claim 4, wherein: the bottom die (1) and the upper die (2) are detachably connected in a sealing manner through a fastening piece (4).

6. An apparatus for making cement slurry specimens as defined in claim 5, wherein: the fastening piece (4) is a fastening bolt penetrating through the upper fastening plate (23) and the lower fastening plate (13), or a spring clip clamping the upper fastening plate (23) and the lower fastening plate (13).

7. An apparatus for making cement slurry specimens as defined in claim 6 wherein: the bottom die (1) and the upper die (2) are integrally cast by cast iron, cast steel or plastics, and the length, width and height of the test piece die cavity (1a) are all 70.7 mm.