CN104865158A - Concrete mixture workability apparatus - Google Patents

Abstract

The invention discloses a concrete mixture workability tester, which is a concrete mixture workability tester with simple structure, convenient operation and high precision. The main body consists of a slump cylinder, a water collection cylinder, a scale It consists of a column, a fixed feeding hopper support ring, a tamper and a base, and is characterized in that: the slump cylinder is in the shape of a circular table, the fixed feeding hopper support ring is installed outside the slump cylinder, and the slump cylinder is placed At the central position of the water collection tube, the water collection tube is arranged on the base, and the base is also provided with a scale column, so that the scale can be seen at a glance, which is convenient for operation and improves the accuracy.

Description

A concrete mix workability tester

technical field

The invention relates to a workability tester for concrete mixture, in particular to a workability tester for concrete mixture with high precision.

Background technique

Workability means that the concrete mixture is easy to operate and can obtain uniform quality and compact shape. Workability is a comprehensive technical property, including three aspects of fluidity, cohesion and water retention. These three aspects are related to each other, but there are often contradictions. Fluidity refers to the property that the concrete mixture is easy to flow, transport and fill the concrete formwork under the action of gravity or mechanical vibration. Cohesion is the ability of a concrete mixture to maintain overall uniformity during construction. Good cohesion can ensure that the concrete mixture does not delaminate or segregate during the process of conveying, pouring, and forming, that is, to ensure that the internal structure of the concrete after hardening is uniform. Water retention is the ability of a concrete mixture to hold water during construction. Good water retention can ensure that the concrete mixture does not have large or serious bleeding during the process of conveying, forming and setting. Interfacial bonding defects caused by accumulation of water in the coarse aggregate and the lower part of the steel bar. Water retention has a great influence on the strength and durability of concrete.

Contents of the invention

The purpose of this invention is to provide a concrete mixture workability tester with simple structure, easy operation and high precision.

A concrete mixture workability tester, the main body is composed of a slump cylinder, a water collection cylinder, a scale column, a fixed feeding hopper support ring, a tamping rod and a base, and its innovative point is that the slump cylinder is a round table Shape, the fixed feeding hopper support ring is installed outside the slump cylinder, the slump cylinder is placed in the center of the water collection cylinder, the water collection cylinder is set on the base, and the base is also provided with a scale column.

Further, the slump cylinder is in the shape of a truncated cone, the upper part is an inverted trapezoid, and the lower part is a regular trapezoid. The inner wall should be smooth and free of convex and concave parts; the bottom and top surfaces should be parallel to each other and perpendicular to the axis of the cone. Install a fixed feeding hopper support ring at the joint of the upper and lower parts outside the slump cylinder, and install two handles at 2/3 of the height; the internal dimensions of the cylinder are: bottom diameter is 18.0-21.0cm; top diameter is 8.5-11.0cm; height It is 28.0-31.0cm; the thickness of the cylinder wall is uniform, and it is 0.08-0.15cm.

Further, the water collection cylinder is an inverted cone structure, with a bottom diameter of 18.0-21.0cm, a top diameter of 33.0-42.0cm, and a depth of 8.0-12.0cm. The inner side of the cylinder wall is coated with ring-shaped areas of different colors.

Further, the scale column is a cylinder with a diameter of 1.5-2.0 cm and a height of 35-40 cm, and scales are engraved on the surface of the column.

Further, the main structure of the fixed feeding hopper support ring is a circular ring with a straight handle, the ring is installed at the joint of the upper and lower parts outside the slump cylinder, and the straight handle is installed on the scale column through a positioning nut, unscrew the positioning Nut, support ring can adjust the height up and down.

Further, the tamper is a cylinder with a diameter of 1.4-2.2 cm and a length of 64-67 cm. One end is rounded and hemispherical, and the other end is provided with a handle.

Further, the base is composed of a table top with a water collection tube, a vertical wall, a column with holes and long strips of interspersed screws; both ends of the table top are arranged on the two vertical walls, and two ends with holes Column, the two long fixing screws pass through the holes of the column with holes at both ends, and are installed through wing nuts.

Further, the desktop is rectangular, 60-90 cm long, 50-60 cm wide, and 1.0-1.5 cm thick.

Further, the standing wall is rectangular, with a width of 50-60 cm, a height of 30-40 cm, and a thickness of 1.0-1.5 cm.

Further, the column with holes is rectangular, with a length of 10-15 cm, a width of 3-5 cm, and a thickness of 1.0-1.5 cm; the hole is located at the upper end of the column with a diameter of 1.0-2.5 cm.

Further, the long threaded screw is a cylinder with a diameter of 1.0-2.0 cm and a length of 110-120 cm, and a wing nut is provided at one end.

The beneficial effects of the present invention are:

1. The concrete mixture workability tester described in the present invention has the advantages of simple structure, convenient operation, high precision and small error.

2. The upper and lower parts of the slump cylinder described in the present invention are connected by welding process and treated by quenching process, which is durable, has certain toughness, is not easy to be damaged, and has been polished to meet people's aesthetic point of view.

3. In the water collecting cylinder of the present invention, the wall of the main part of the water collecting cylinder is made of 2mm thick steel plate, and the inner side of the cylinder wall is coated with ring-shaped areas of different colors, and the quality of water retention can be quantitatively determined according to the area where the liquid surface is located.

4. The scale column of the present invention can accurately display the scale shown during measurement, which is clear at a glance and easy to operate.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a schematic diagram of the assembly structure of the present invention.

Fig. 2 is a schematic cross-sectional view of the assembly structure of the present invention.

Fig. 3 is a schematic diagram of the structure of the long threaded screw of the present invention.

Fig. 4 is a schematic diagram of the structure of the tamping rod of the present invention.

Fig. 5 is a structural schematic diagram of the base of the present invention.

Detailed ways

The schematic diagram of the assembly structure shown in Figure 1 is composed of a base 1, a slump cylinder 2, a column with holes 3, a scale column 4, a positioning nut 5, and a support ring 6 for a fixed feeding hopper.

As shown in FIG. 3 , the structural schematic diagram of the long threaded screw is composed of the long threaded screw 7 and the wing nut 8 .

1) First use a damp cloth to moisten the slump cylinder, feeding hopper, wall and bottom surface of the water collection cylinder and other utensils, requiring wetting and no clear water. Place the base on a solid level surface, fix the slump cylinder and the base together with long screws, and place the feeding hopper on the slump cylinder.

2) Put the mixed concrete mixture sample into the cylinder evenly in three layers with a spatula according to the requirements, so that the height of each layer of the sample after compaction is about 1/3 of the height of the cylinder. Insert and pound each layer 25 times with a tamping stick. When inserting and tamping, it should be carried out from the periphery to the center along the spiral direction, and each insertion and tamping should be evenly distributed on the cross section. When inserting the concrete sample on the side of the tamping cylinder, the tamping rod can be slightly inclined; when inserting and tamping the bottom layer, the tamping rod should penetrate the entire depth; when inserting the second layer and the top layer, the tamping rod should penetrate the surface of this layer to the next layer . When pouring the top layer, the concrete mixture should be poured to 2/3 of the feeding hopper. After the top layer is inserted and pounded, scrape off the excess concrete mixture and smooth it with a spatula.

3) After clearing the concrete on the base of the tube side, lift the slump tube vertically and smoothly. The raising process of the slump cylinder should be completed within 5~10s. The whole process from the start of charging to lifting the slump cylinder should be completed within 150s.

4) After lifting the slump cylinder, immediately move the slump scale on the column so that the lower edge of the scale is level with the highest point of the slumped concrete mixture specimen, and read the scale from the lower edge of the connecting ring on the vertical bar (in mm), this value is the slump value of the concrete mixture.

5) Observe the height of the liquid level in the water collecting tube, and determine the water retention of the concrete according to the color area where the liquid level is located. If the liquid level is in the higher color area or part of the concrete mixture in the cone is exposed due to slurry flow, the water retention of the concrete is poor; if the liquid level is in the lower area, it indicates that the water retention is good.

6) After the slump cylinder is lifted away, if the specimen collapses or one side is sheared, it should be re-sampled for measurement. If this phenomenon still occurs for the second time, it means that the workability of the mixture is not good, and it should be recorded for future reference.

7) After measuring and recording the slump and water retention, tap lightly on the side of the slumped mixture cone with a tamping stick. If the cone sinks gradually, it means that the mixture has good cohesion; if the cone The body collapses, partially cracks or segregates, that is, the cohesion is poor.

8) When the measured slump of the mixture does not meet the requirements, the water-cement ratio can be kept unchanged, and 5% or 10% of cement and water can be added; when the slump is too large, the sand rate can be kept unchanged , increase the amount of sand and gravel as appropriate; if the cohesion or water retention is poor, the sand rate needs to be adjusted appropriately. After each adjustment, mix well as soon as possible, and re-measure the slump.

The above descriptions are preferred embodiments of the present invention, and should not be used to limit the scope of rights of the present invention. It should be pointed out that for those skilled in the art, modifications or equivalent replacements to the technical solutions of the present invention will not depart from the protection scope of the present invention.

Claims (11)

1. A concrete mixture workability tester, the main body is made of a slump cylinder, a water collecting cylinder, a scale column, a fixed feeding hopper support ring, a tamping rod and a base, and it is characterized in that: the slump cylinder is Conical shape, the fixed feeding hopper support ring is installed outside the slump cylinder, the slump cylinder is placed in the center of the water collection cylinder, the water collection cylinder is set on the base, and the base is also equipped with a scale column. 2. a kind of concrete mixture workability measuring instrument according to claim 1, is characterized in that: described slump cylinder is conical shape, and upper part is inverted trapezoid, and lower part is positive trapezoid, and its inner wall should be Smooth, no convex and concave parts; the bottom surface and the top surface should be parallel to each other and perpendicular to the axis of the cone; install a fixed feeding hopper support ring at the connection between the upper and lower parts outside the slump cylinder, and install two handles at 2/3 of the height; The internal dimensions are as follows: the diameter of the bottom is 18.0cm-21.0cm; the diameter of the top is 8.5cm-11.0cm; the height is 28.0cm-31.0cm; the thickness of the cylinder wall is uniform and is 0.05cm-0.20cm. 3. A concrete mixture workability tester according to claim 2, characterized in that: the water collecting cylinder is an inverted cone structure, the diameter of the bottom is 18.0-21.0 cm, and the diameter of the top is 33.0-42.0 cm cm, 8.0-12.0 cm deep, and the inner side of the cylinder wall is painted with ring-shaped areas of different colors. 4. A concrete mixture workability tester according to claim 1, characterized in that: the scale column is a cylinder with a diameter of 1.5cm to 2.0cm and a height of 30cm to 40cm, and the surface of the column is engraved There are scales. 5. An electric concrete mixture workability tester according to claim 1, characterized in that: said fixed feeding hopper support ring, the structural main body is in the shape of a ring with a straight handle, and the ring is installed in the slump The connection between the upper and lower parts outside the scale cylinder, and the straight handle is installed on the scale column through the positioning nut; after removing the slump cylinder, the height of the support ring can be adjusted by loosening the positioning nut. 6. A concrete mixture workability tester according to claim 1, characterized in that: said tamping rod is a cylinder with a diameter of 1.4 to 2.2 cm and a length of 64 to 67 cm, and one end is rounded , in the shape of a hemisphere, with a handshake at the other end. 7. A concrete mixture workability tester according to claim 1, characterized in that: the base is composed of a table top with a water collection tube, a vertical wall, a column with holes and long fixing screws; It is arranged on two vertical walls, and two ends of the desktop are respectively provided with two uprights with holes, and the two long fixing screws pass through the holes of the uprights with holes at both ends, and are installed through wing nuts. 8. A concrete mixture workability tester according to claim 7, characterized in that: the table top with a water collection tube is a concave rectangle, 60-90 cm long, 50-60 cm wide, and 1.0-1.5 cm thick. cm; the water collection cylinder is an inverted cone structure, with a bottom diameter of 18.0-21.0cm, a top diameter of 33.0-42.0cm, and a depth of 8.0-12.0cm. The inside of the cylinder wall is coated with ring-shaped areas of different colors. 9. A concrete mixture workability tester according to claim 7, characterized in that: the vertical wall is rectangular, with a width of 50-60 cm, a height of 30-40 cm, and a thickness of 1.0-1.5 cm. 10. A concrete mixture workability tester according to claim 7, characterized in that: the column with holes is rectangular, 10-15 cm long, 3-5 cm wide, and 1.0-1.5 cm thick; Located at the upper end of the column, the diameter is 1.5-2.5cm. 11. A concrete mixture workability tester according to claim 7, characterized in that: the long fixing screw is a cylinder with a diameter of 1.0-1.5 cm and a length of 110-120 cm, and one end is provided with wing nut.