Concrete slump measuring equipment

Abstract

The utility model discloses concrete slump measuring equipment, which relates to the technical field of concrete quality inspection equipment and comprises a slump bottom plate, a slump cylinder, a horizontal support, a fixed pedal, an L-shaped mounting rod, a horizontal lever, a horizontal ruler and a vertical ruler. The middle of the upper end of the horizontal lever is rotationally arranged on the lower portion of the end of a transverse rod of the L-shaped mounting rod, vertical rulers are movably arranged on the two sides of the lower end of the horizontal ruler respectively, and fixing pedals used for fixing equipment are arranged on the two sides of the horizontal support respectively. According to the device, when the measuring scale is rotated for measurement, the horizontal ruler can be always kept horizontal, higher measurement precision is achieved, the height of a mixture can be measured while the horizontal ruler is rotated by lifting the L-shaped mounting rod, and the device has a large application range.

Description

TECHNICAL FIELD

[0001] The utility model relates to concrete quality inspection equipment technical field, concretely relates to a concrete slump test equipment. BACKGROUND

[0002] The measurement of cement concrete mixture slump spread is suitable for cement concrete mixture with maximum aggregate particle size not greater than 31.5mm and slump not less than 160mm, and is used for evaluating the viscosity of cement concrete mixture, the filling capacity and fluidity of cement concrete under the action of gravity, and the working performance of cement concrete.

[0003] The measurement steps of the prior art for the cement concrete mixture slump spread are as follows: the bottom plate and the slump cylinder are wetted with a sponge or a towel, and there should be no clear water on the inner wall and the bottom plate of the slump; the bottom plate is placed on a solid horizontal surface, the slump cylinder is placed at the center position of the bottom plate, the lower edge is coincided with the 200mm scale ring, the slump cylinder is kept fixed during loading, the concrete mixture should be evenly loaded into the slump cylinder in three layers (the self-compacting concrete mixture should be filled to the full without layering, and no vibration or tamping is applied during the whole loading process), every time a layer of concrete mixture is loaded, the tamping rod is inserted and tamped 25 times uniformly in a spiral shape from the edge to the center, and the height of each layer of concrete mixture sample after tamping is about 1 / 3 of the cylinder height; when tamping the bottom layer, the tamping rod should penetrate the whole depth, when tamping the second layer and the top layer, the tamping rod should penetrate the layer to the surface of the next layer; after tamping the top layer, the loading funnel is removed, the excess concrete mixture is scraped off, and the excess concrete around the bottom plate and the slump cylinder is removed, then the slump cylinder is quickly lifted vertically at a uniform speed to a height of about 300mm, and the lifting time is preferably controlled within 3-7s. When the concrete stops flowing or the extension duration reaches 50s, the maximum diameter of the mixture spread circle and the diameter perpendicular to the maximum diameter are measured using a steel ruler. The whole process from the start of loading to the lifting of the slump cylinder should be uninterrupted and completed within 40s. The extension degree of the concrete is the average value of the two diameters perpendicular to each other on the extension surface after the slump spread of the concrete mixture ends, and when the difference between the two diameters is greater than 50mm, the measurement needs to be repeated. The concrete slump tester (JG / T 248) and the mixing and on-site sampling method of cement concrete mixture (T 0521) in the "Highway Engineering Cement and Cement Concrete Test Regulations" JTG 3420-2020 are referenced.

[0004] 1. The maximum diameter of the mixture spread circle is not easy to determine by visual observation during measurement;

[0005] 2. The test personnel is inconvenient to operate, the measurement error is large, the surface is irregular when the mixture is developed, the center of the developed circle is high, the edge of the circle is low, the steel ruler is in a suspended state when measuring the surface of the mixture, it is difficult to keep the steel ruler horizontal, the starting point and the end point of the maximum diameter of the developed circle are difficult to estimate, the steel plate ruler is difficult to closely read, and multiple test personnel are required to cooperate during measurement, which is time-consuming and laborious.

[0006] In order to solve the above problems, a concrete slump measuring device is provided. SUMMARY

[0007] The utility model provides a concrete slump measuring device for the above problems, solve the mixture development circle's maximum diameter when measuring is not easy to judge by visual observation and in traditional test, the test personnel is inconvenient to operate, the measurement error is large, the surface is irregular when the mixture is developed, the center of the developed circle is high, the edge of the circle is low, the steel ruler is in a suspended state when measuring the surface of the mixture, it is difficult to keep the steel ruler horizontal, the starting point and the end point of the maximum diameter of the developed circle are difficult to estimate, the steel plate ruler is difficult to closely read, and multiple test personnel are required to cooperate during measurement, which is time-consuming and laborious.

[0008] The utility model adopts the technical scheme of containing slump base plate, slump cylinder, horizontal support, fixed tread, L type installation rod, horizontal lever, level, vertical ruler, support leg, base plate,

[0009] The upper end center position of the slump base plate is detachably provided with a slump cylinder, and the upper end center position of the slump base plate is detachably provided with a slump cylinder, and the upper end center position of the slump base plate is detachably provided with a slump cylinder,

[0010] The middle end of the level is coaxially arranged with the center of the slump cylinder,

[0011] The upper end of the level is fixedly provided with a horizontal lever, and the upper end of the horizontal lever is provided with the horizontal rod of the L type installation rod,

[0012] The upper end of the horizontal lever is rotatably arranged at the lower part of the horizontal rod end of the L type installation rod,

[0013] The two ends of the horizontal lever are vertically provided with support legs, and the two support legs are fixedly provided with base plates at the lower ends,

[0014] The two base plates are detachably connected between the upper ends of the slump base plate,

[0015] The lower end of the level is movably provided with a vertical ruler on both sides, and the two vertical rulers are movably arranged on both sides of the same diameter on the slump cylinder,

[0016] The vertical rod of the L type installation rod is provided with a horizontal support below, and the vertical rod of the L type installation rod is movably arranged above the horizontal support.

[0017] Two sides of the horizontal support are respectively provided with fixing steps for fixing equipment, both of the fixing steps are arranged on the rear side of the slump board, and both of the supporting legs are movably arranged on the front side of the two fixing steps.

[0018] Further, the lower end of the horizontal ruler is provided with a convex plate, and the upper end of each of the two vertical rulers is provided with a sliding groove block;

[0019] Both of the sliding groove blocks are slidably arranged between the two supporting legs;

[0020] Both of the sliding groove blocks are slidably clamped on the outer wall of the convex plate, and a fastening screw is arranged on the side wall of each of the two sliding groove blocks and detachably contacts the outer wall of the convex plate.

[0021] Further, the lower end of each of the two vertical rulers is provided with a first rectangular through hole, and an extended vertical ruler is slidably arranged in each of the two first rectangular through holes;

[0022] The lower end of each of the two extended vertical rulers detachably contacts the upper end of the slump board.

[0023] Further, a fixing rod is vertically arranged at the middle of the upper end of the horizontal support, and a rectangular guide rod is arranged at the upper end of the fixing rod;

[0024] The vertical rod of the L-shaped mounting rod is provided with a second rectangular through hole matched with the rectangular guide rod;

[0025] The rectangular guide rod is slidably arranged in the second rectangular through hole.

[0026] Further, the upper end of the horizontal rod of the L-shaped mounting rod is provided with a handrail for assisting the user in lifting the equipment.

[0027] Further, a rubber pad for increasing friction is arranged in each of the two fixing steps.

[0028] Further, a circular scale line for roughly measuring the diameter of the mixture is arranged at the center of the upper end of the slump board.

[0029] Further, a spare vertical ruler is movably arranged on the outer side of each of the two vertical rulers, and a spare extended vertical ruler is movably arranged at the lower end of each of the two spare vertical rulers.

[0030] A spare sliding groove block is arranged at the top end of each of the two spare vertical rulers, and the spare sliding groove block is slidably arranged on the outer wall of the convex plate.

[0031] The advantages of the utility model are as follows:

[0032] The utility model discloses in the use process avoided manual level holds the rule to measure, avoids the problem that the measurement error is bigger that is caused by holding instability, the utility model discloses when rotating the rule to measure, can always make the level to keep level, has higher measurement precision, the utility model discloses through the rotation of the level to the L type installation pole of lifting, also can measure the height of the mixture, has greater application range.

[0033] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages, which will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated herein for explanation.

[0035] Fig. 1 It is the overall structure schematic drawing of the utility model;

[0036] Fig. 2 It is the overall structure rear schematic drawing of the utility model;

[0037] Fig. 3 It is the installation schematic drawing of the utility model vertical ruler;

[0038] Fig. 4 It is the overall structure plan view of the utility model slump bottom plate.

[0039] Reference Signs:

[0040] 1 is the slump bottom plate, 2 is the slump cylinder, 3 is the horizontal support, 4 is the fixed tread, 5 is the fixed rod, 6 is the L type installation rod, 7 is the handrail, 8 is the horizontal lever, 9 is the level, 10 is the convex plate, 11 is the sliding groove block, 12 is the vertical ruler, 13 is the expansion vertical ruler, 14 is the supporting leg, 15 is the base plate, 16 is the rectangular guide rod. DETAILED DESCRIPTION

[0041] In order to make the purposes, technical schemes and advantages of the utility model more clear and obvious, the utility model will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0042] In the description of the utility model, it needs to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0043] Reference Figs. 1 to 4 A concrete slump measuring device comprises a slump base plate 1, a slump cylinder 2, a horizontal support 3, a fixed foot plate 4, an L-shaped mounting rod 6, a horizontal lever 8, a level 9, a vertical ruler 12, a supporting leg 14, and a base plate 15.

[0044] The slump cylinder 2 is detachably installed at the upper end center position of the slump base plate 1, and the level 9 is movably installed above the slump cylinder 2. The slump base plate 1 is used for containing the slump cylinder 2, and the slump cylinder 2 is used for bearing the concrete mixture. Here, the concrete slump meter (JG / T 248) and the mixing and on-site sampling method of cement concrete mixture (T 0521) in the "Highway Engineering Cement and Cement Concrete Test Procedures" JTG 3420-2020 are cited as the existing measurement method, and will not be described here.

[0045] The middle end of the level 9 is coaxially arranged with the center of the slump cylinder 2, which ensures that the level 9 can point to the diameter of the mixture and facilitates reading.

[0046] The horizontal lever 8 is fixedly installed at the upper end of the level 9, and the horizontal lever 8 is installed at the upper end of the horizontal lever 8.

[0047] The upper end of the horizontal lever 8 is rotatably installed at the lower part of the end of the horizontal lever 8. The L-shaped mounting rod 6 is used to lift the horizontal lever 8, which facilitates the rotation of the horizontal lever 8. The horizontal lever 8 can drive the level fixedly installed thereon to rotate by rotating. During the rotation of the level 9, the rotation direction is always parallel to the slump base plate 1, which has great stability compared with the conventional handheld steel ruler rotating by itself, and greatly improves the measurement accuracy.

[0048] The two ends of the horizontal lever 8 are respectively vertically installed with the supporting legs 14, and the two supporting legs 14 are respectively fixedly installed with the base plates 15 at the lower ends. The supporting legs 14 are used to increase the stability of the horizontal lever 8, and when the two supporting legs 14 contact the slump base plate 1, the level 9 can be ensured to be in a static state after rotation, which facilitates the test personnel to read under the condition that the level 9 is stable, thereby reducing the measurement error.

[0049] Two bottom plates 15 are respectively detachably contacted with the upper end of the slump board 1, and the lower end of the bottom plate 15 is provided with an abrasive surface, which serves to increase the friction between the bottom plate 15 and the slump board 1, thereby avoiding slipping;

[0050] The lower end of the level 9 is movably provided with two vertical rulers 12, and the two vertical rulers 12 are movably arranged on the slump drum 2 at the same diameter. The two vertical rulers 12 can be moved below the level 9 to measure the diameter of the mixture, and the distance between the two vertical rulers 12 is the specific vertical of the diameter of the mixture.

[0051] The vertical rod of the L-shaped mounting rod 6 is movably arranged above the horizontal support 3.

[0052] The two sides of the horizontal support 3 are respectively provided with a fixed pedal 4 for fixing the equipment, and the two fixed pedals 4 are arranged on the rear side of the slump board 1. The two legs 14 are movably arranged on the front side of the two pedals 4. The horizontal support 3 is used to mount the fixed pedals 4 on both sides. The test personnel can increase the overall stability of the equipment by stepping on the two fixed pedals 4. When the level 9 needs to be rotated, the horizontal lever 8 needs to be lifted first. During this process, the equipment will not be deviated by manually applying pressure to the pedal 4.

[0053] The lower end of the level 9 is provided with a convex plate 10, and the upper end of the two vertical rulers 12 is provided with a sliding groove block 11.

[0054] The two sliding groove blocks 11 are movably arranged between the two legs 14.

[0055] The two sliding groove blocks 11 are respectively slidably connected to the outer wall of the convex plate 10. The two sliding groove blocks 11 are respectively provided with a fastening screw, and the two fastening screws are detachably contacted with the outer wall of the convex plate 10. The convex plate 10 limits the sliding track of the two sliding groove blocks 11. During the sliding process of the two sliding groove blocks 11, the two vertical rulers 12 are always perpendicular to the slump board 1, which facilitates the measurement of the height of the mixture.

[0056] The lower end of the two vertical rulers 12 is provided with a first rectangular through hole, and the two first rectangular through holes are respectively slidably provided with an expansion vertical ruler 13. The expansion vertical ruler 13 is matched with the vertical ruler 12 through friction limiting, which can prevent the expansion vertical ruler 13 from falling off the vertical ruler 12. The first rectangular through hole is provided with a through pulling groove, which facilitates the pulling out of the expansion vertical ruler 13 after the expansion vertical ruler 13 is completely retracted into the vertical ruler 12.

[0057] The lower ends of the two extension vertical rulers 13 are detachably contacted with the upper ends of the slump base plate 1, when the height of the mixture is greater than the height of the vertical ruler 12, the extension vertical ruler 13 can be extended from the lower side of the vertical ruler 12 by lifting the L-shaped mounting rod 6, and the full length of the vertical ruler 12 plus the length of the extension vertical ruler 13 is the height of the mixture.

[0058] The upper end of the horizontal support 3 is vertically provided with a fixed rod 5, and the upper end of the fixed rod 5 is provided with a rectangular guide rod 16;

[0059] The lower end of the vertical rod of the L-shaped mounting rod 6 is provided with a second rectangular through hole matched with the rectangular guide rod 16;

[0060] The rectangular guide rod 16 is slidably installed in the second rectangular through hole, and the cooperation between the second rectangular through hole and the rectangular guide rod 16 can limit the sliding track of the L-shaped mounting rod 6 and ensure that the L-shaped mounting rod 6 cannot rotate during the upward and downward sliding.

[0061] The upper end of the horizontal rod of the L-shaped mounting rod 6 is provided with a handrail 7 for assisting the user to lift the device, which can assist the tester to hold and lift the L-shaped mounting rod 6.

[0062] The two footboards 4 are both provided with rubber pads for increasing friction, so that the tester's feet will not slip when stepping into the footboard 4, and the safety is improved.

[0063] The upper end of the slump base plate 1 is provided with a circular scale line for measuring the diameter of the mixture, and when the slump drum 2 is removed, the mixture will be laid on the circular scale line, and then the tester can roughly judge the diameter of the mixture through the circular scale line.

[0064] The outer sides of the two vertical rulers 12 are respectively movably provided with spare vertical rulers, and the lower ends of the two spare vertical rulers are respectively movably provided with spare extension vertical rulers.

[0065] The top ends of the two spare vertical rulers are respectively provided with spare sliding blocks, and the two spare sliding blocks are slidably installed on the outer wall of the convex plate 10, which can complete the test work through the spare vertical rulers when the two vertical rulers 12 are damaged.

[0066] The implementation method of the utility model:

[0067] Place the slump base 1 on a horizontal surface, make sure there is no debris on the horizontal surface, place the slump cylinder 2 at the center of the upper end of the slump base 1, process the mixture in the slump cylinder 2 and lift the slump cylinder 2 completely away from the mixture in the manner described in the Concrete Slump Tester (JG / T 248) and Mixing and Sampling in Place of Cement Concrete Mixture (T 0521) in the Highway Engineering Cement and Cement Concrete Test Procedures JTG 3420-2020, at this time the mixture is not supported by external force and begins to collapse gradually;

[0068] At this time, make sure that the center position of the level 9 is approximately coincident with the center position of the circular mixture, during this process, the maximum diameter direction of the circular mixture can be approximately judged by the circular scale line at the upper end of the slump base 1;

[0069] After judging the approximate direction, the user steps into the pedal 4, holds the handrail 7 and lifts the horizontal lever 8 upward, at this time the horizontal lever 8 is lifted upward, and the chassis 15 on both sides is separated from the top end of the slump base 1, the horizontal lever 8 is not supported and can start to rotate under the action of external force, rotate the horizontal lever 8 to the direction of the maximum diameter of the circular mixture observed, then slowly lower the horizontal lever 8 to make the chassis 15 on both sides contact above the slump base 1, realize support, the horizontal lever 8 will not start to rotate after receiving the support force, at this time the level 9 fixedly installed with the horizontal lever 8 can be fixed in the direction of the maximum diameter of the circular mixture, the experimenter leaves the pedal 4 and starts to align the vertical ruler 12 on both sides to the edge position of the maximum diameter of the circular mixture, the maximum diameter of the circular mixture can be accurately read by observing the distance between the two vertical rulers;

[0070] Repeat the above steps, rotate the horizontal lever 8 to a certain angle several times to read the distance between the two vertical rulers 12 to obtain multiple sets of data, compare several readings to determine the maximum diameter of the mixture expansion. Finally, mark the maximum diameter position of the circular mixture expansion, rotate the device by 90°, measure the diameter perpendicular to the maximum diameter, and the result is rounded to 5mm.

[0071] According to the record in the Highway Engineering Cement and Cement Concrete Test Procedures JTG 3420-2020, when the slump expansion stops, the difference between the diameters of the average of the two diameters perpendicular to the expansion surface is greater than 50mm, the measurement needs to be re-measured;

[0072] When the height of the mixture needs to be measured, the reading on any vertical ruler 12 can be directly read, when the height of the mixture is higher than the full length of the vertical ruler 12, the sum of the lengths exposed by the vertical ruler 12 and the expansion vertical ruler 13 can be read by lifting the L-shaped mounting rod 6.

[0073] The utility model discloses in the use process avoided manual level to hold the rule to measure, avoided the problem that the measurement error is bigger that caused by holding instability, the utility model discloses in the rotation rule measures, can always make level to keep level, has higher measurement accuracy, the utility model discloses through the rotation of the level of lifting L type installation pole to the level, also can measure the height of the mixture, has greater application range.

[0074] The above merely describes the preferred embodiments of the utility model and is not intended to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A concrete slump measuring apparatus characterized by: The utility model relates to a collapsible slump board, which comprises a slump board (1), a slump cylinder (2), horizontal supports (3), fixed steps (4), an L-shaped mounting rod (6), a horizontal lever (8), a level (9), vertical rulers (12), legs (14) and a base plate (15). A detachable slump cylinder (2) is arranged at the center of the upper end of the slump board (1), and a level (9) is movably arranged above the slump cylinder (2). The middle end of the level (9) is coaxially arranged with the center of the slump cylinder (2). A horizontal lever (8) is fixedly arranged at the upper end of the level (9), and the upper middle part of the horizontal lever (8) is provided with a horizontal bar of an L-shaped mounting rod (6). The upper middle part of the horizontal lever (8) is rotatably arranged at the lower part of the horizontal bar end of the L-shaped mounting rod (6). Two legs (14) are vertically arranged at the two ends of the horizontal lever (8), respectively, and two base plates (15) are fixedly arranged at the lower ends of the two legs (14), respectively. The two base plates (15) are detachably connected with the upper end of the slump board (1), respectively. Two vertical rulers (12) are movably arranged on the slump cylinder (2) at the two sides of the same diameter, respectively. Horizontal supports (3) are arranged below the vertical bar of the L-shaped mounting rod (6), and the vertical bar of the L-shaped mounting rod (6) is movably arranged above the horizontal supports (3). Fixed steps (4) for fixing equipment are arranged at the two sides of the horizontal supports (3), respectively, and the two fixed steps (4) are arranged at the rear side of the slump board (1), and the two legs (14) are movably arranged at the front side of the two steps (4).

2. The concrete slump measuring apparatus as defined in claim 1 wherein: The lower end of the level (9) is provided with a convex plate (10), and the upper ends of the two vertical rulers (12) are provided with sliding groove blocks (11), respectively. The two sliding groove blocks (11) are slidably arranged between the two legs (14). The two sliding groove blocks (11) are slidably connected with the outer wall of the convex plate (10), respectively, and the side walls of the two sliding groove blocks (11) are provided with fastening screws, respectively, which are detachably connected with the outer wall of the convex plate (10).

3. The concrete slump measuring apparatus as defined in claim 2 wherein: The lower ends of the two vertical rulers (12) are provided with first rectangular through holes, respectively, and expansion vertical rulers (13) are slidably arranged in the two first rectangular through holes, respectively. The lower ends of the two expansion vertical rulers (13) are detachably connected with the upper end of the slump board (1), respectively.

4. The concrete slump measuring apparatus as recited in claim 1, wherein: A fixed rod (5) is vertically arranged at the middle part of the upper end of the horizontal supports (3), and the upper end of the fixed rod (5) is provided with a rectangular guide rod (16). The vertical bar of the L-shaped mounting rod (6) is provided with a second rectangular through hole which cooperates with the rectangular guide rod (16). The rectangular guide rod (16) is slidably arranged in the second rectangular through hole.

5. The concrete slump measuring apparatus as defined in claim 1 wherein: The upper end of the horizontal bar of the L-shaped mounting rod (6) is provided with a handrail (7) for assisting users in lifting equipment.

6. The concrete slump measuring apparatus as defined in claim 1 wherein: Rubber pads for increasing friction are arranged in the two steps (4).

7. The concrete slump measuring apparatus as defined in claim 1 wherein: A circular scale line for measuring the diameter of a mixture is arranged at the center of the upper end of the slump board (1).

8. The concrete slump measuring apparatus as defined in claim 3 wherein: The outer sides of the two vertical rulers (12) are respectively provided with spare vertical rulers, and the lower ends of the two spare vertical rulers are respectively provided with spare expansion vertical rulers; The top ends of the two spare vertical rulers are respectively provided with spare sliding groove blocks, and the two spare sliding groove blocks are slidingly arranged on the outer wall of the convex plate (10).

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