RU42318U1 - DEVICE FOR DETERMINING THE STRENGTH OF FINE-CONCRETE CONCRETE AND Masonry Mortar IN THE DESIGN - Google Patents

Abstract

Usage: for quality control of fine-grained concrete and masonry mortar in the structure of the mechanical method of non-destructive testing. Essence: The device consists of a housing 1, a load-calibrated spring 2, a rod 3, an end stop handle 4, a support platform 5, a limiter for moving the spring-cup 6, a fastener 7 of the conical indenter 8, a recording device in the form of an indicator of the clock type 9, fixing movement indenter 8 relative to the housing, vernier 10, lever 11. The device provides the possibility of constant efforts of the indenter on the material in building structures.

Description

The utility model relates to the field of materials quality control instruments, namely to mechanical methods of non-destructive testing.

A device for determining the hardness of a material by the indenter penetration depth is known, including a housing with stops and a recording device, a loading spring mounted on the rod, spring movement limiters and a conical indenter.

The disadvantages of this device is the inability to use it to determine the strength of the masonry mortar in the structure due to the need to ensure the indenter is introduced into the surface of the material from a constant level relative to the body of the device (most often from the level of the reference plane of the device). Providing this condition in masonry is usually time-consuming, and sometimes impossible.

The technical task is to expand the range of testing of materials, improve the accuracy of tests and simplify the design.

The problem is solved in such a way that in the device for determining the strength of fine-grained concrete and masonry mortar in a structure including a body with a stop and a recording device, a rod with an end stop handle, a loading spring mounted on the rod, a spring limiter and a conical indenter, according to a utility model , the spring movement limiter is made in the form of a cup mounted with the possibility of movement relative to the rod and the housing, and a vernier is applied to the housing for installation of the rear nnogo distance equal to the height of the compression spring, the abutment body is designed as a support pad with three supports.

The difference is that the spring movement limiter is made in the form of a cup mounted with the possibility of movement relative to the rod and the body, and a vernier is applied to the body to set a predetermined distance equal to the spring compression height, while the body stop is made in the form of a support platform with three supports.

The technical result is the possibility before each test, with the help of a glass regulating the amount of compression of the spring, to control the force exerted on the indenter, i.e. withstand the indentation force given, regardless of the location of the surface of the test material relative to the housing. This allows measurements to be made when the indenter deviates from the plane of the supporting platform up to 10 mm, which is possible when testing the solution in the masonry structure. And the supporting platform of the housing with three supports provides stability during testing on uneven surfaces, for example, on the wall of a building structure made of masonry.

The drawing shows a device for determining the strength of fine-grained concrete and masonry mortar in the structure.

The device consists of a housing 1, a load-calibrated spring 2, a rod 3, an end stop handle 4, a support pad 5, a limiter for moving the spring-cup 6, a fastener 7 of the conical indenter 8, a recording device in the form of an hour-type indicator 9, fixing the movement of the indenter 8 relative to the housing, vernier 10, lever 11.

The device operates as follows:

To determine the strength of the solution, the device is installed by the reference platform 5 on the surface of the test material. The rotation of the support platform 5 relative to the housing 1 must be achieved

obtaining a gap between the indenter 8 and the surface of the test material with the lever 11 raised to the stop (approximately 5-10 mm). Gently move the stop handle of the device 4 until the indenter 8 touches the surface of the test material. Next, the compression force of the spring 2 is adjusted by moving the cup 6, setting it to the selected level according to the nonius 10, and set the dial indicator to the “0” position. Then, the palm is pressed gently with the palm of the thrust handle 4 until it stops, ensuring that the pad 5 is constantly resting on the surface of the material and the indicator 9 is taken. Then the handle 4 is smoothly released. The strength value of the material is set according to the previously obtained calibration relationship between indirect results of non-destructive tests (introduction of the indenter into the material of control samples) and the results of compression test of control samples.

Sources of information:

1. RF patent No. 2079127, cl. G 01 N 3/42, BI No. 13, 05/10/97.

Claims (1)

A device for determining the strength of fine-grained concrete and masonry mortar in a structure, including a body with a stop and a recording device, a rod with an end stop handle, a loading spring mounted on the rod, a spring movement limiter and a conical indenter, characterized in that the spring movement limiter is made in the form of a glass installed with the possibility of movement relative to the rod and the housing, and the vernier is applied to the housing to set a predetermined distance equal to the compression height of the spring, when ohm stop body is designed as a support pad with three supports.