CN205403643U - Measure special chi of slump - Google Patents

Abstract

The utility model relates to the field of concrete detection, and specifically discloses a special ruler for measuring the slump of concrete. The special ruler for measuring the slump of concrete provided by the utility model includes a base, a support and a ruler, wherein: the support The component includes a first bracket and a second bracket, the bottom end of the first bracket is fixedly connected to the base, one end of the second bracket is fixedly connected to the first bracket, and the second bracket is connected to the base The vertical height of the bottom surface of the base is consistent with the height of the slump barrel used for testing the slump of concrete; the ruler is vertically arranged on the second support so that it can move up and down. The special ruler for measuring the slump of concrete provided by the utility model has the advantages of simple operation and high measurement accuracy when measuring the slump of concrete, and can ensure timely and accurate measurement of the slump of concrete.

Description

A special ruler for measuring the slump of concrete

【Technical field】

The utility model relates to the field of concrete detection, in particular to a special ruler for measuring the slump of concrete.

【Background technique】

Concrete slump refers to the workability of concrete, including water retention, fluidity and cohesion of concrete, and is a comprehensive performance index of concrete. The slump meter currently used in China to measure the slump of concrete needs to place a tamping stick, wooden square or ruler on the slump bucket to locate the horizontal position, and then set up a tape measure perpendicular to the horizontal position outside for reading. It is cumbersome, the measurement efficiency is low, and the measurement error is large. The inaccurate measurement of the concrete slump will seriously affect the design of the concrete mix ratio, which will lead to errors in the design of the mix ratio and affect the quality of the project.

【Content of utility model】

The utility model aims to solve the problems of low measurement efficiency and large measurement error in the process of measuring the slump of concrete, and provides a special ruler for measuring the slump of concrete. The technical scheme is as follows:

The utility model provides a special ruler for measuring the slump of concrete, including a base, a support and a ruler, wherein:

The support includes a first bracket and a second bracket, the bottom end of the first bracket is fixedly connected to the base, one end of the second bracket is fixedly connected to the first bracket, and the second bracket The vertical height from the bottom surface of the base is consistent with the height of the slump barrel used to test the slump of concrete;

The ruler is vertically arranged on the second support so that it can move up and down.

In some embodiments, the special ruler further includes a movable sleeve and a positioning bolt mechanically connected to the movable sleeve;

The ruler is movably connected with the second bracket through the movable sleeve, and the ruler is positioned through the positioning bolt.

In some embodiments, the second bracket is provided with movable guide rails, the movable guide rails extend to both ends of the second bracket, and the movable sleeve drives the ruler to move along the movable guide rails.

In some embodiments, the second stent includes a left branch and a right branch;

One end of the right branch is fixedly connected to the first bracket, the other end of the right branch is connected to the left branch through a rotating shaft, and the left branch rotates around the rotating shaft through the rotating shaft.

In some embodiments, the base is a metal base.

In some embodiments, the support is a wooden support.

In some embodiments, the ruler is a wooden ruler.

In some embodiments, the first bracket and/or the second bracket is in the shape of a bar.

In some embodiments, the vertical height between the second support and the bottom surface of the base is 300 mm.

In some embodiments, the measurement range of the ruler is 0-300mm.

The beneficial effect of the specific embodiment of the utility model is that the special ruler for measuring the slump of concrete provided by the utility model is easy to operate, has high measurement accuracy, and can ensure that the slump of concrete can be measured in time. Measure accurately.

【Description of drawings】

Fig. 1 is a schematic structural view of a special ruler for measuring concrete slump provided by an embodiment of the present invention.

Reference signs: 1, base; 2, support member; 3, ruler; 4, movable sleeve; 5, movable guide rail; 21, first bracket; 22, second bracket; 221, left branch; 222, right branch .

【detailed description】

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Example 1

As shown in FIG. 1 , the special ruler for measuring the slump of concrete provided by the utility model includes a base 1 , a support 2 and a ruler 3 .

The support member 2 includes a first bracket 21 and a second bracket 22, the bottom end of the first bracket 21 is fixedly connected to the base 1, one end of the second bracket 22 is fixedly connected to the first bracket 21, and the second bracket 22 is connected to the bottom of the base 1. The vertical height of the bottom surface is consistent with the height of the slump barrel used for testing the slump of concrete; the ruler 3 is vertically arranged on the second support 22 so that it can move up and down.

Preferably, the special ruler further includes a movable sleeve 4 and a positioning bolt (not shown) mechanically connected with the movable sleeve 4 . The ruler 3 is movably connected with the second support 22 through the movable sleeve 4, and the ruler 3 is positioned by the positioning bolts. The up and down movement of the ruler 3 cooperates with the positioning of the positioning bolts to achieve accurate measurement of the concrete slump.

Preferably, the second bracket 22 is provided with a movable guide rail 5 extending to both ends of the second bracket 22 , and the movable sleeve 4 drives the ruler 3 to move along the movable guide rail 5 . The straightedge 3 can move laterally on the second support 22 arranged horizontally, and the straightedge 3 can move vertically in the vertical direction again, and the combination of horizontal and vertical motion facilitates the measurement of the concrete slump by the special ruler.

Preferably, the second bracket 22 includes a left branch 221 and a right branch 222 . One end of the right branch 222 is fixedly connected with the first bracket 21, and the other end of the right branch 222 is connected with the left branch 221 through a rotating shaft (not shown), and the left branch 221 rotates around the rotating shaft through the rotating shaft. The special ruler for measuring concrete slump provided by this embodiment is a foldable design. When not in use, the ruler 3 can be moved to an end close to the first bracket 21 through the movable sleeve 4, and the left branch 221 is passed through the rotating shaft. The base 1 is rotated 90 degrees so that the left branch 221 is parallel to the first bracket 21 . The folded special ruler has a low space occupation rate and is not easily damaged during transportation and storage, which ensures the measurement accuracy and service life of the special ruler.

Further, the base 1 is a metal base 1 , for example, iron with a relatively high specific gravity is used to make the base 1 . The support 2 is a wooden support. Straightedge 3 is a wooden ruler. The base 1 with a larger mass, the support 2 and the ruler 3 with a smaller mass facilitate the positioning of the special ruler when in use, and will not tilt due to the excessive mass of the support 2 and the ruler 3, resulting in inaccurate measurement, and Wooden supports and wooden rulers are less expensive to make.

Preferably, the first bracket 21 and/or the second bracket 22 are in the shape of a bar.

Generally, during the concrete slump measurement process, the height of the slump bucket used is 300 mm, so the vertical height between the second bracket 22 and the bottom surface of the base 1 can be set to 300 mm. Those skilled in the art should understand that the setting of the vertical height between the second bracket 22 and the bottom surface of the base 1 is only used to explain the utility model, and is not intended to limit the utility model, and the vertical height can vary with the height of the slump barrel Change to change. Further, the measuring range of the ruler 3 may be 0-300mm.

When using the special ruler for measuring the concrete slump provided by the utility model to measure the concrete slump, the steps are as follows:

1. Before the test, clean the inside and outside of the slump cylinder, place it on a flat plate that has been wet with water (the flat plate should be covered with plastic cloth when absorbing water), and step on the footboard tightly.

2. Put representative samples of concrete into the cylinder in three layers. The height of each layer is slightly greater than 1/3 of the height of the cylinder. Use a tamping rod to insert and tamp evenly on the cross-section of each layer for several times, for example, 25 times. Inserting and tamping is carried out on the entire area of the concrete, from the edge to the center along the spiral line. When inserting and tamping the bottom layer, insert to the bottom. When inserting and tamping the other two layers, it should penetrate through this layer and insert about 20-30mm into the lower layer. The insertion and tamping must be vertical Downward (except for the edge part), no impact is allowed. When inserting and tamping the top layer, the loaded concrete should be higher than the mouth of the slump cylinder, and the mixture can be added at any time during the inserting and tamping process. When the top layer is inserted and tamped, use the tamping rod to saw and roll to remove excess concrete, smooth the mouth of the cylinder with a steamed knife, and scrape the mixture around the bottom of the cylinder. Then immediately lift the slump cylinder vertically, and the lifting can be completed within 5 to 10 seconds, and the concrete is not subject to lateral and torsion forces. The entire process from the start of charging to the lifting of the slump cylinder should be completed within 150s.

3. Put the slump cylinder on the side of the cone-shaped concrete sample, then place the special ruler provided in this embodiment on the flat plate and close to the cone-shaped concrete sample, and slide the wooden ruler to make the bottom of the ruler and the top of the sample At this time, the value on the ruler corresponding to the intersection of the bottom surface of the beam and the ruler is the slump of the concrete, accurate to 1mm.

The special ruler for measuring concrete slump provided by this embodiment is easy to operate and has high measurement accuracy when measuring concrete slump, and can ensure timely and accurate measurement of concrete slump; the foldable design is convenient for the special ruler transportation and storage.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. A special ruler for measuring concrete slump is characterized in that it comprises a base, a support and a ruler, wherein: The support includes a first bracket and a second bracket, the bottom end of the first bracket is fixedly connected to the base, one end of the second bracket is fixedly connected to the first bracket, and the second bracket The vertical height from the bottom surface of the base is consistent with the height of the slump barrel used to test the slump of concrete; The ruler is vertically arranged on the second support so that it can move up and down. 2. the special chi for measuring concrete slump as claimed in claim 1, is characterized in that, described special chi also comprises movable sleeve and the set bolt that is mechanically connected with described movable sleeve; The ruler is movably connected with the second bracket through the movable sleeve, and the ruler is positioned through the positioning bolt. 3. The special ruler for measuring concrete slump as claimed in claim 2, wherein said second support is provided with a movable guide rail, and said movable guide rail extends to both ends of said second support, and said movable guide rail The sleeve drives the ruler to move along the movable guide rail. 4. the special chi for measuring concrete slump as claimed in claim 3, is characterized in that, described second support comprises left branch and right branch; One end of the right branch is fixedly connected to the first bracket, the other end of the right branch is connected to the left branch through a rotating shaft, and the left branch rotates around the rotating shaft through the rotating shaft. 5. The special ruler for measuring concrete slump as claimed in claim 1, wherein the base is a metal base. 6. The special ruler for measuring concrete slump as claimed in claim 1, wherein the support is a wooden support. 7. The special ruler for measuring concrete slump as claimed in claim 1, wherein said ruler is a wooden ruler. 8. The special ruler for measuring concrete slump according to claim 1, characterized in that, the first bracket and/or the second bracket is in the shape of a strip. 9. The special ruler for measuring concrete slump as claimed in claim 1, wherein the vertical height between the second bracket and the bottom surface of the base is 300mm. 10. The special ruler for measuring concrete slump as claimed in claim 9, wherein the measurement range of the ruler is 0-300mm.