CN202649064U - Test template for measuring concrete compressive strength by rebound method - Google Patents

Abstract

The utility model discloses a template for testing the compressive strength of concrete by a rebound method, the surface of which is provided with test holes, the test holes are not less than 16, which is an integer multiple of 16, and every 16 test holes are one test hole. area, the area of each survey area is not greater than 0.04m ² . The test hole can be in any shape, and the diameter of the inscribed circle is not less than 10mm and not greater than 50mm. The hole center distance of the test hole should be greater than 20mm, and the preferred hole center distance is 30mm. The utility model is simple to operate, easy to use, and the measuring points are evenly distributed in the measuring area, standardized, and easy to remove. A clean and environmentally friendly test template for testing the compressive strength of concrete by the rebound method.

Description

Formwork for concrete compressive strength testing by rebound method

technical field

The utility model relates to a concrete testing device, in particular to a template for testing the compressive strength of concrete by a rebound method. the

Background technique

For decades, the "rebound method", a method suitable for my country's national conditions to detect the compressive strength of concrete, has become the most widely used and most convenient method for in-situ detection of concrete engineering in my country; The indispensable testing instruments in the quality control, quality supervision and quality testing process have played an important role in improving the level of non-destructive testing of engineering quality in my country and ensuring the quality of engineering. my country has become the largest producer and user of rebound hammers in the world. country. the

The industry standard of the People's Republic of China JGJ/T 23-2001 "Technical Regulations for Testing the Compressive Strength of Concrete by Rebound Method" stipulates the measurement area and measurement points as follows:

4.1.3 Regulations of survey area

5 The area of the survey area should not be larger than 0.04m ² .

4.1.6 Determination of rebound value

The measuring points should be evenly distributed in the measuring area, the clear distance between two adjacent measuring points should not be less than 20mm, and the distance between the measuring points and exposed steel bars and embedded parts should not be less than 30mm. The measuring point should not be on air holes or exposed stones. The same measuring point should only be flicked once. Record 16 rebound values in each measuring area, and the rebound value reading at each measuring point should be estimated to 1. the

According to the standard, when measuring, the traditional method is to use a pen (chalk or red and blue pencil, etc.) and a ruler to mark the grid on the test surface. Draw 16 grids in a measurement area, each grid rebounds once. However, this method is cumbersome and lacks standardization, and the handwriting should not be removed after the test, resulting in contamination of the wall. the

Contents of the invention

The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art, and provide a template for testing the compressive strength of concrete with simple operation, convenient use, and standard environmental protection. the

The utility model is realized through the following technical solutions. the

The template for testing the compressive strength of concrete by the rebound method has test holes on its surface. The test holes are not less than 16, which is an integer multiple of 16. Every 16 test holes is a test area, and the area of each test area is Not more than 0.04m ² .

The template is made of plastic board, cardboard or thin metal plate material. the

The back side of the template is provided with back glue, and the back glue can be distributed in the form of points, lines, strips or planes. the

The shape of the test hole is a circle, square, rectangle, triangle or trapezoid; the diameter of the circle, the side length of the square, the short side length of the rectangle, and the diameter of the inscribed circle of the triangle or trapezoid are not less than 10 mm, and not greater than 50mm. the

The center-to-center distance of the test holes is greater than 20mm. the

Each of the 16 measuring holes of the template is a basic unit, and the template is a combination of one or two or more basic units. the

Two or four sides of the template are provided with binding or fastening devices for easy fixing. the

The utility model has the beneficial effects of providing a simple operation, convenient use, uniform distribution of measuring points in the measuring area, standardization, and easy removal. No stains, no handwriting, clean and environmentally friendly test template for testing the compressive strength of concrete by rebound method. the

Description of drawings

Fig. 1 is a schematic diagram of a test template with a single basic unit;

Fig. 2 is a schematic diagram of a test template with a plurality of basic units connected in series;

Fig. 3 is a schematic diagram of a test template with multiple basic units connected in parallel;

Fig. 4 is a schematic diagram of a well-field test template with multiple basic units. the

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described. the

The utility model adopts plastic plates, cardboards, thin metal plates or metal plates with steel wires of different thicknesses as materials. the

As shown in Figure 1, the test formwork of the utility model rebound method detects concrete compressive strength, and its surface is evenly or unevenly provided with test holes, and the test holes are not less than 16, which are integer multiples of 16, and each 16 test holes constitute a test area, and the area of each test area is not greater than 0.04m ² .

The back side of the test template is provided with back glue, which can be pasted on the surface of the concrete component to be tested in order to facilitate the detection. The back glue can be distributed in the form of points, lines, strips or surfaces. It is also possible to set binding or fastening devices on two or four sides of the template to facilitate the fixing of the test template. the

Every 16 test holes of the utility model is a basic unit, which can be made into a test template of a basic unit, as shown in FIG. 1 . It can also be made into series, parallel and well field test templates composed of several basic units, as shown in Fig. 2, Fig. 3 and Fig. 4. In short, arbitrary combinations can be made in units of basic units. the

The shape of the test hole of the utility model can be a circle, and can also be any shape such as a square, a rectangle, a triangle, a trapezoid or a polygon; the diameter of a circle, the side length of a square, the length of a short side of a rectangle, and the diameter of an inscribed circle of a polygon Not less than 10mm and not more than 50mm. The hole center distance of the test hole should be greater than 20mm, and the preferred hole center distance should not be less than 30mm. the

Claims (7)

1. A rebound method detects concrete compressive strength test formwork, is characterized in that, its surface is provided with test hole, and described test hole is not less than 16, is the integral multiple of 16, and every 16 test holes are one Survey area, the area of each survey area is not more than 0.04m ² . 2. rebound method according to claim 1 detects template for concrete compressive strength test, is characterized in that, described template adopts plastic plate, cardboard, sheet metal material to make. 3. rebound method according to claim 1 detects concrete compressive strength test formwork, it is characterized in that, the back side of described formwork is provided with back glue, and back glue can be dot shape, line shape, strip shape or planar distributed. 4. rebound method according to claim 1 detects template for concrete compressive strength test, is characterized in that, the shape of described test hole is circle, square, rectangle, triangle or trapezoid; The diameter of circle, square The side length, the short side length of a rectangle, and the diameter of the inscribed circle of a triangle or trapezoid are not less than 10mm and not more than 50mm. 5. The template for testing concrete compressive strength by rebound method according to claim 1, characterized in that, the center-to-center distance of the test holes is not less than 20mm. 6. rebound method according to claim 1 detects concrete compressive strength test formwork, is characterized in that, 16 test holes of described formwork are a basic unit, and this formwork is one or two and more than two basic units. combination of units. 7. The template for testing the compressive strength of concrete by rebound method according to claim 1, characterized in that, the two sides or four sides of the template are provided with binding or fastening devices for easy fixing. the

Images