Device for testing rheological property of high-fluidity concrete

Abstract

The utility model discloses a device for testing the rheological property of high-flowability concrete, which relates to the technical field of concrete detection equipment and comprises a base, a slump cone, a slump plate and a supporting part, the lower surface of the slump cone is attached to the upper surface of the base, and the supporting part is fixedly arranged on the base and positioned in the slump cone; a guide hole is formed in the middle of the slump plate, the slump plate is movably arranged on the supporting part in a sleeving mode through the guide hole, and the outer diameter of the slump plate is smaller than the minimum inner diameter of the slump barrel. According to the utility model, the slump plate with the guide hole is arranged, so that the slump plate descends along with the slump of concrete, and the time value when the slump plate descends to a certain height or the height value when the slump plate descends to a certain time can be read in real time through external detection equipment in the process; parameters at any point needing to be measured can be obtained according to needs, then calculation is further carried out to obtain needed results, the measurement results are diversified, and the obtained final results are more detailed.

Description

TECHNICAL FIELD

[0001] The utility model relates to concrete detection equipment technical field especially relates to a big liquidity concrete rheological property testing arrangement. BACKGROUND

[0002] The big liquidity concrete generally refers to the concrete that slump is greater than 160mm, has high liquidity, anti segregation bleeding property, is applicable to pumping delivery and concrete pouring engineering.

[0003] The utility model discloses a concrete slump detection device, including the bottom plate, be equipped with the slump cone for the concrete slump on the bottom plate, and be equipped with the measuring rod for measuring the concrete slump, the extension rod is equipped with on the measuring rod, and the extension rod can slide up and down along the axial direction of the measuring rod, and the measuring rod is inscribed with the slump scale. The upper portion of the slump cone is equipped with the abutment plate in the horizontal direction, a plurality of abutting rods for abutting on the outer wall of the slump cone are fixedly connected on the abutment plate, a vertical direction tamper is penetrated on the abutment plate, a communication groove for the tamper to pass through is formed on the abutment plate, the tamper is slidably connected in the communication groove, a positioning block for abutting on the abutment plate is fixed on the tamper, and the positioning block is fixedly connected on the tamper away from the bottom plate side of the abutment plate. Through the setting of the abutting rod and the abutment plate, the difference of the compaction degree of the concrete is reduced, and the accuracy of the concrete slump measurement is increased.

[0004] The utility model discloses a concrete slump detection device, including box, double shaft motor, transmission structure, screw rod, slide bar, transmission plate, scale structure, slump cylinder, baffle ring, circular plate, discharge gate and clamping structure, adopt mechanized mode to lift the slump cylinder. Its scale structure includes cylinder, is equipped with the extrusion groove on the back of the cylinder, is inlaidly installed with the scale on the front of the cylinder, is equipped with the ring on the outer wall of the cylinder, the vertical board is welded and installed on the front of the ring, the butterfly bolt that is suitable for is connected in screw thread with the thread hole that is equipped on the back of the ring through its screw thread, and the one end of butterfly bolt is located in the inside of extrusion groove. When needing to use scale structure, rotate butterfly bolt to make the one end of butterfly bolt remove the contact of the inner wall of extrusion groove, make the ring vertical movement adjust the height of vertical board, can know the height difference between height and low place according to the scale, measure the slump.

[0005] The problems in the prior art are that the extension rod and the vertical plate as the measuring device are adjusted to the corresponding positions after the slump stability of the concrete, and then the readings are read, the measurement result is single, and the rheological parameter calculated according to the measurement result is single. Practical new type content

[0006] The utility model discloses a big liquidity concrete rheological property testing device to solve the problems in the prior art, and parameters at corresponding measuring points can be obtained according to different requirements.

[0007] To achieve the above object, the utility model provides the following scheme:

[0008] A big liquidity concrete rheological property testing device, including base, slump cone, slump board and support part, the lower surface of the slump cone is attached with the upper surface of the base, the support part is fixedly arranged on the base and is located inside the slump cone, the slump board is provided with the guide hole in the middle part, the slump board is movably sleeved on the support part through the guide hole, and the outer diameter of the slump board is less than the minimum inner diameter of the slump cone.

[0009] Preferably, the slump cone is a conical structure that is small at the top and large at the bottom.

[0010] Preferably, the upper opening diameter of the slump cone is 100mm, the lower opening diameter is 200mm, and the cylinder height is 300mm.

[0011] Preferably, the outer diameter of the slump board is 90mm.

[0012] Preferably, the slump board is a hollow structure.

[0013] Preferably, the material of the base is a steel plate or a rigid lightweight material.

[0014] Preferably, the support part is provided with a limiting part, and the limiting part is located below the slump board.

[0015] Preferably, the limiting part is fixedly connected with the support part.

[0016] Preferably, the limiting part is threadedly sleeved with the support part.

[0017] Preferably, the limiting part is arranged at a position 200mm away from the base.

[0018] Compared with the prior art, the utility model has the following technical effects:

[0019] 1. By setting the slump board with a guide hole, and by the guide hole movable sleeve set on the support part, in use, the slump board is placed at the top of the concrete to be measured, after the slump cylinder is taken out, the slump board descends together with the slump of the concrete, in this process, the time value when the slump board descends to a certain height can be read in real time by the external detection equipment, or the height value when it descends to a certain time, the parameters at any required measurement point can be obtained according to the needs, and the required results can be further calculated, the measurement results are various, and the final results required are more detailed.

[0020] 2. By setting the limiting part on the support part, the slump board is limited during the process of descending with the concrete, the concrete slump stops descending and the time is accurately counted when the slump board stops descending to a certain height, and the plastic viscosity of the concrete is obtained according to the formula. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 The structural schematic diagram of the present application;

[0023] Figure 2 The top view of Figure 1

[0024] Among them, 1, base; 2, slump cylinder; 3, slump board; 4, support part; 5, limiting part. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings and specific embodiments in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] Please refer to Figures 1 to 2 ​The embodiment provides a large-flowability concrete rheological property testing device, which comprises a base 1, a slump cone 2, a slump plate 3 and a supporting part 4, the lower surface of the slump cone 2 is attached to the upper surface of the base 1, and specifically, the slump cone 2 can be directly placed on the base 1. The supporting part 4 is fixedly arranged on the base 1 and located inside the slump cone 2. A guide hole is formed in the middle of the slump plate 3, the inner diameter of the guide hole is greater than the outer diameter of the supporting part 4, and the slump plate 3 is movably sleeved on the supporting part 4 through the guide hole. The outer diameter of the slump plate 3 is smaller than the minimum inner diameter of the slump cone 2, so that the slump cone 2 can pass through the slump plate 3 without any obstacle in the process of being pulled out upwards along the supporting part 4.

[0027] Specifically, the base 1 is made of a steel plate or a rigid lightweight material, the slump plate 3 is a hollow structure, and a lightweight material is also preferably used. The slump cone 2 is a conical structure with a small upper opening and a large lower opening, and the specific size in the embodiment is that the upper opening diameter is 100 mm, the lower opening diameter is 200 mm, and the cylinder height is 300 mm. The outer diameter of the slump plate 3 is 90 mm, which is smaller than the upper opening diameter of the slump cone 2.

[0028] As a preferred scheme of the embodiment, a limiting part 5 is arranged on the supporting part 4, and the limiting part 5 is located below the slump plate 3 and used for limiting the slump plate 3 in the process of descending with the concrete. The connecting mode of the limiting part 5 and the supporting part 4 can be fixed connection, such as welding, or movable connection, such as threaded sleeve connection. When the fixed connection is used, the height of the supporting part 4 from the base 1 is fixed, and the fixed detection scene is applied; when the movable connection is used, the specific height of the limiting part 5 can be adjusted according to different needs of different scenes. In the embodiment, the specific height of the limiting part 5 from the base 1 is 200 mm.

[0029] A use method of the embodiment is as follows: first, the supporting part 4 is fixedly connected with the non-through threaded jack in the center of the base 1 through the threads at the bottom of the supporting part 4, the limiting part 5 is fixed on the supporting part 4 at a position 200 mm away from the base 1 through welding, the slump cone 2 with an upper opening diameter of 100 mm, a lower opening diameter of 200 mm and a cylinder height of 300 mm is placed in the center of the base 1, the freshly mixed large-flowability concrete is poured into the slump cone 2, is tamped and is leveled, the slump plate 3 is placed on the top of the concrete, then the slump cone 2 is vertically lifted upwards, the timing starts from the time when the slump cone 2 is lifted, the slump plate 3 descends with the concrete, and stops when the slump plate 3 collides with the limiting part 5, at this moment, the timing is recorded once and is recorded as T, that is, the time used when the concrete slump reaches 100 mm, when the timing reaches 60 s, the final slump of the concrete is measured and is recorded as S.

[0030] The yield stress of the large-flowability concrete can be modeled with the slump as follows:

[0031]

[0032] wherein τ0 is the yield stress, Pa; ρc is the density of the concrete, kg / m3; S is the final slump, mm; and k1 is a coefficient in the range of 335-360.

[0033] The plastic viscosity of the high flowability concrete can be modeled with the slump as follows:

[0034] μ=k2·ρT·25×10 -3 160<S<200mm

[0035] μ=k3·ρT·(S-175)×10 -3 200mm≤S<260mm

[0036] wherein μ is the plastic viscosity, Pa-s; ρ is the density of the concrete, kg / m3; T is the time taken for the concrete to reach a slump of 100 mm, s; S is the final slump, mm; and k2 and k3 are coefficients in the range of 0.9-1.1.

[0037] Due to differences in the rheometer parameters and the different concrete material proportions, the present application only provides the model and the parameter range, and the specific values of the parameters need to be determined in combination with different situations. Compared with the actual yield stress and plastic viscosity, the fitting degree is above 0.95.

[0038] Adaptive changes according to actual requirements are within the protection scope of the present application.

[0039] It should be noted that, for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A device for testing the rheological properties of high- fluidity concrete, characterized in that: The base, the slump cone, the slump board and the support part are included, the lower surface of the slump cone is attached to the upper surface of the base, the support part is fixedly arranged on the base and located inside the slump cone, the middle part of the slump board is provided with a guide hole, the slump board is movably sleeved on the support part through the guide hole, and the outer diameter of the slump board is smaller than the minimum inner diameter of the slump cone.

2. The device for testing rheological properties of high-fluidity concrete according to claim 1, characterized in that: The slump cone is a conical structure with a small upper part and a large lower part.

3. The device for testing rheological properties of high-fluidity concrete according to claim 2, characterized in that: The upper opening diameter of the slump cone is 100 mm, the lower opening diameter is 200 mm, and the height of the slump cone is 300 mm.

4. The device for testing rheological properties of high-fluidity concrete according to claim 3, characterized in that: The outer diameter of the slump board is 90 mm.

5. The device for testing the rheological properties of high- fluidity concrete according to claim 4, characterized in that: The slump board is a hollow structure.

6. The device for testing the rheological properties of high- fluidity concrete according to claim 1, characterized in that: The base is made of steel plate or rigid lightweight material.

7. The device for testing rheological properties of high-fluidity concrete according to any one of claims 1 to 6, characterized in that: The support part is provided with a limiting part, and the limiting part is located below the slump board.

8. The device for testing the rheological properties of high-fluidity concrete according to claim 7, characterized in that: The limiting part is fixedly connected with the support part.

9. The device for testing the rheological properties of high- fluidity concrete according to claim 7, characterized in that: The limiting part is threadedly sleeved with the support part.

10. The device for testing the rheological properties of high- fluidity concrete according to claim 7, characterized in that: The limiting part is arranged at a position 200 mm away from the base.

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