Concrete self-compacting performance testing device

Abstract

The utility model discloses a concrete self-compacting performance testing device, which relates to the technical field of concrete performance detection, and comprises a circular ring, a support column and a slump cone, a plurality of fixing pieces are fixed on the circular ring, the fixing pieces extend inwards along the radial direction of the circular ring, and the end parts of the plurality of fixing pieces are positioned on the same circular track coaxial with the circular ring; the multiple supporting columns are evenly arranged at the bottom of the circular ring at intervals in an arc-shaped track mode, and the arc-shaped track is half of the circular track of the circular ring. The slump cone is inversely arranged in the circular ring, and the side wall of the slump cone is attached to the end part of the fixing piece; through the cooperation of the slump cone, the circular ring and the supporting column, the concrete self-compacting performance testing device can be simplified, and construction production is facilitated; and the concrete self-compaction performance is evaluated through expansion degree data on two sides of the circular ring, so that the convenience and accuracy of the concrete self-compaction performance test are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to concrete performance detection technical field, especially a kind of concrete self-compacting performance testing device. BACKGROUND

[0002] Self-compacting concrete is a kind of concrete that can flow and compact under its own gravity without additional vibration to completely fill the formwork, which has excellent fluidity and filling property. The self-compacting performance of concrete is the key to ensure the quality of concrete pouring. How to effectively evaluate the self-compacting performance of concrete is very important for quality control in the preparation and construction process of self-compacting concrete.

[0003] In order to simply and accurately evaluate the self-compacting performance of concrete, many methods have been proposed by domestic and foreign researchers, and a series of breakthroughs have been made. At present, there are nearly ten kinds of laboratory or field test methods for evaluating the self-compacting performance of fresh concrete based on experience, such as L-type box, U-type box, Orimet method, V-funnel test, etc. For example, in the invention patent with application number "201810459125.9" and name "a self-compacting concrete self-compacting performance comprehensive tester and its testing method", the self-compacting performance of self-compacting concrete mixture is detected by using a self-compacting performance comprehensive tester. The detection method is to fill a certain mass of mixture into a V-funnel, open the valve after 10s, make the mixture pass through the V-funnel and the horizontal groove with steel reinforcement in turn, and then discharge into the receiving container. After opening the valve for 40s, stop receiving, and use the ratio of the discharged mixture mass to the total mass, i.e. the concrete discharge rate P to evaluate its self-compacting performance. This technical scheme can comprehensively evaluate the filling property, gap passing property and segregation resistance of self-compacting concrete through one test. However, its structure is complex, occupies a large volume, and the valve is easy to block during testing. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a kind of concrete self-compacting performance testing device to solve the problems existing in prior art, simplify concrete self-compacting performance testing device, improve the convenience and accuracy of concrete self-compacting performance test.

[0005] In order to achieve the above object, the utility model provides the following scheme: the utility model provides a kind of concrete self-compacting performance testing device, including circular ring, support column and slump cylinder, the circular ring is fixed with several fixed parts, the fixed part extends inward along the radial direction of the circular ring, and the end of several fixed parts is located on the same circular track coaxial with the circular ring;The support column has several, the support column is evenly spaced and arranged in the bottom of the circular ring in arc track, and the arc track is half of the circular track of the circular ring;The slump cylinder is inverted inside the circular ring, the sidewall of the slump cylinder is attached to the end of the fixed part, and the internal cavity of the slump cylinder is used to fill concrete.

[0006] Preferably, the fixed parts are uniformly fixed on the circular ring.

[0007] Preferably, the fixed parts are detachably connected with the circular ring.

[0008] Preferably, the fixed parts are fixed sheets.

[0009] Preferably, the fixed sheets are made of steel or stainless steel material, and the length of the fixed sheet is 60mm.

[0010] Preferably, the circular ring is made of steel or stainless steel material, and the outer diameter of the circular ring is 338mm, the inner diameter is 262mm, the center diameter is 300mm, and the thickness is 25mm.

[0011] Preferably, the circular ring is uniformly connected with nine support columns.

[0012] Preferably, the support column is made of steel or stainless steel material, and the diameter of the support column is 16mm, and the height is 100mm.

[0013] The utility model has the following technical effects relative to prior art:

[0014] The utility model can simplify concrete self-compacting performance testing device through the cooperation of slump cylinder, circular ring and support column, which is convenient for construction production;And the pros and cons of concrete self-compacting performance are evaluated through the expansion degree data of both sides of circular ring, which improves the convenience and accuracy of concrete self-compacting performance testing.In addition, the fixed parts for centering the slump cylinder are fixed on the circular ring in the utility model, which can improve the accuracy of test results. BRIEF DESCRIPTION OF DRAWINGS

[0015] 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 for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0016] Figure 1 It is a whole structure schematic view of the concrete self-compacting performance testing device.

[0017] Figure 2 It is a cooperation structure schematic view of the circular ring, the supporting column and the fixing piece.

[0018] Figure 3 It is a top view of Figure 2

[0019] Among them, 1 is a circular ring, 2 is a supporting column, 3 is a slump cone, and 4 is a fixing piece. Specific embodiments

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the 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.

[0021] The purpose of the present application is to provide a concrete self-compacting performance testing device to solve the problems in the prior art, simplify the concrete self-compacting performance testing device, and improve the convenience and accuracy of the concrete self-compacting performance testing.

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0023] For example Figures 1-3 ​As shown, the embodiment provides a concrete self-compacting performance testing device, which comprises a circular ring 1, support columns 2 and a slump cone 3. The circular ring 1 is fixed with a plurality of fixing members, the fixing members extend inward along the radial direction of the circular ring 1, and the end portions of the fixing members are located on the same circular track coaxial with the circular ring 1. The support columns 2 are evenly spaced in an arc track at the bottom of the circular ring 1, and the two support columns 2 at the end portions of the arc track are located at the endpoints of a diameter of the circular ring 1, that is, the arc track where the support columns 2 are distributed is half of the circular track of the circular ring 1. The slump cone 3 in the embodiment is inverted inside the circular ring 1 during use, the side wall of the slump cone 3 is attached to the end portions of the fixing members, and the internal cavity of the slump cone 3 is used to fill with concrete.

[0024] During testing, the support columns 2 are placed on a horizontal plane, the slump cone 3 is inverted inside the circular ring 1, the inner end portions of the fixing members are attached to the outer wall of the slump cone 3, and the slump cone 3 is coaxial with the circular ring 1. Then, the mixed concrete is filled into the slump cone 3 at one time, the excess concrete is removed from the top of the slump cone 3, the top of the slump cone 3 is smoothed, and the concrete around the bottom of the slump cone 3 is removed. Then, the slump cone 3 is lifted upward by 229 mm ± 76 mm in the vertical direction, and the lifting time is controlled within 3 s ± 1 s. When the concrete stops flowing or expanding for 50 s, the height difference between the inside and outside of the ring and the expansion degree on both sides of the circular steel column are measured using a measuring device (such as a steel ruler). Finally, the concrete bleeding property is tested by the slurry screening method, and the mortar passing rate is 5% to 15%, which is good, more than 15% indicates segregation, and more than 30% is serious segregation. The slurry screening method is a common method in the art, and the specific process is not described herein.

[0025] After the slump cone 3 is lifted, the radii R1 (radius on the side without the circular steel column) and R2 (radius on the side with the circular steel column) of the irregular fan-shaped expansion of the mixture on both sides are calculated, and the difference ΔL = 2R1-2R2 between the two expansion degrees is calculated. The value can be used to judge the gap passing property of the self-compacting concrete, and further evaluate the advantages and disadvantages of the concrete self-compacting performance.

[0026] Indicator rating Poor Average Good Excellent △L ＞25 15～25 ＜15

[0027] Therefore, the cooperation of the slump cone 3, the circular ring 1 and the support columns 2 can simplify the concrete self-compacting performance testing device and facilitate construction production. Moreover, the advantages and disadvantages of the concrete self-compacting performance are evaluated by the expansion degree data on both sides of the circular ring, which improves the convenience and accuracy of the concrete self-compacting performance testing. In addition, the fixing members on the circular ring 1 can center the slump cone 3, which can improve the accuracy of the test results.

[0028] Further, the fixing pieces in the embodiment are uniformly fixed on the circular ring 1. The number of the fixing pieces is not less than 3, and is 4 in the embodiment. The fixing piece can be a fixing sheet 4. The fixing sheet 4 is made of steel or stainless steel material, and the length of the fixing sheet 4 is 60mm. The fixing sheet 4 is detachably connected with the circular ring 1, such as bolt connection, so as to facilitate the dismounting, replacement and cleaning of the fixing sheet 4.

[0029] Further, the circular ring in the embodiment is made of steel or stainless steel material, the outer diameter of the circular ring 1 is 338mm, the inner diameter is 262mm, the center diameter is 300mm, and the thickness is 25mm.

[0030] Further, the circular ring in the embodiment is made of steel or stainless steel material, the outer diameter of the circular ring 1 is 338mm, the inner diameter is 262mm, the center diameter is 300mm, and the thickness is 25mm.

[0031] According to the actual demand, the adaptive changes are within the protection scope of the utility model.

[0032] It should be noted that, for those skilled in the art, it is obvious that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. A device for testing the self compactibility of concrete, characterised in that, The device comprises a circular ring, supporting columns and a slump cone, the circular ring is fixed with a plurality of fixing members, the fixing members extend inward along the radial direction of the circular ring, and the end portions of the fixing members are located on the same circular track coaxial with the circular ring; the supporting columns are evenly spaced in the bottom of the circular ring along an arc track which is half of the circular track of the circular ring; the slump cone is inverted inside the circular ring, the side wall of the slump cone is attached to the end portions of the fixing members, and the inner cavity of the slump cone is used to fill with concrete.

2. The concrete self-compacting ability test apparatus according to claim 1, characterized by, The fixing members are evenly fixed on the circular ring.

3. The concrete self-compacting ability test apparatus according to claim 2, wherein The fixing members are detachably connected with the circular ring.

4. The concrete self-compacting ability test apparatus according to claim 3, wherein The fixing members are fixing plates.

5. The concrete self-compacting ability test apparatus according to claim 4, wherein The fixing plates are made of steel or stainless steel, and the length of the fixing plates is 60mm.

6. The concrete self-compacting ability test apparatus according to claim 1, wherein The circular ring is made of steel or stainless steel, the outer diameter of the circular ring is 338mm, the inner diameter is 262mm, the center diameter is 300mm, and the thickness is 25mm.

7. The concrete self-compacting ability test apparatus according to claim 1, wherein Nine supporting columns are evenly connected to the circular ring.

8. The concrete self-compacting ability test apparatus according to claim 7, wherein The supporting columns are made of steel or stainless steel, the diameter of the supporting columns is 16mm, and the height is 100mm.

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