Device and method for pressing rod type measurement on demoulding performance of concrete

A technology for demoulding performance and concrete, which is applied in the field of pressure rod-type devices for measuring the demoulding performance of concrete, can solve the problems of time-consuming and labor-intensive operation, complicated equipment cost, and inaccurateness, etc., to overcome expensive equipment, accurate and reliable measurement methods, and reduce effect of difficulty

Active Publication Date: 2018-10-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a device and method for measuring the demoulding performance of concrete with a pressure rod, so as to solve the problems of inaccuracy, time-consuming and laborious operation, complicated equipment and high cost in the existing evaluation method of concrete demoulding performance

Method used

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  • Device and method for pressing rod type measurement on demoulding performance of concrete
  • Device and method for pressing rod type measurement on demoulding performance of concrete
  • Device and method for pressing rod type measurement on demoulding performance of concrete

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specific Embodiment approach 1

[0026] Specific implementation mode one: combine figure 1 , figure 2 , image 3 and Figure 4 Describe this embodiment, this embodiment comprises base 1, column 2, pressure rod 3, pressure member 4, pressure sensor 5, dowel 6, screw plug 13 and concrete mould, described base 1 is horizontally arranged, and column 2 is vertical It is directly arranged on the base 1 and its lower end is fixedly connected with the column 2. The base 1 is processed with a mounting hole 9 matching the concrete mold. The concrete mold includes an outer sleeve 8-1, an upper pressing plate 8-2, and a lower pressing plate 8-3. , the inner sleeve 8-4, the upper cover 8-5 and the lower cover 8-6, the outer wall of the outer sleeve 8-1 is provided with a shoulder 10 matched with the mounting hole 9, and the outer sleeve 8-1 passes through the shoulder 10 Clipped on the installation hole 9 of the base 1, the inner casing 8-4 is inside the outer casing 8-1 and the two are arranged coaxially, and concret...

specific Embodiment approach 2

[0030] Embodiment 2: This embodiment is a further limitation of Embodiment 1. The pressure member 4 includes a connecting rod 4-1 and an arc cover 4-2. One end of the connecting rod 4-1 is detachably connected to the pressing rod 3. , the other end of the connecting rod 4-1 is provided with an arc cover 4-2, and the arc-shaped end of the arc cover 4-2 is bent toward the depression bar. The pressure member 4 is arranged as an arc-shaped screw to ensure that the pressure member 4 is always in good contact with the pressure sensor 5 and exerts force downward in the vertical direction when the pressure rod 3 is under force.

specific Embodiment approach 3

[0031] Embodiment 3: This embodiment is a further limitation of Embodiment 1 or 2. The upper platen 8-2 is processed with a first through hole 11 along its thickness direction, and the inner wall of the first through hole 11 is processed with a first internal thread. The lower pressing plate 8-3 is processed with a second through hole 12 along its thickness direction, and the inner wall of the second through hole 12 is processed with a second internal thread, and the outer wall of the plug 13 is processed with a first internal thread and a second internal thread respectively. The screw thread matches the external thread, and the screw plug 13 is detachably connected to the second through hole 12. When the dowel rod 6 passes through the first through hole 11, the upper end of the screw plug 13 is closely attached to the lower end of the dowel rod 6. .

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Abstract

The invention provides a device for pressing rod type measurement on the demoulding performance of concrete and aims to solve the problems that an existing concrete demoulding performance evaluation method is not accurate enough, operation steps are tedious, time-consuming and laborious, and equipment is complex and high in cost. An outer sleeve in a concrete mold is clamped in a mounting hole ofa base through a shroud; a screwed plug is respectively and detachably connected with an upper pressing plate or a lower pressing plate; the lower end of a dowel bar is closely attached to the top surface of the screwed plug, and the upper end of the dowel bar is connected with lower end of a pressure applying part through a pressure sensor; the upper end of the pressure applying part is detachably connected with a pressing rod, one end of the pressing rod is hinged to an upright column, and the other end of the pressing rod is a force applying end. In the device provided by the invention, F1+G0 is first bonding force between the lower pressing plate and the concrete, the area of the lower pressing plate is measured and recorded as S1, and first bonding tensile stress between the lower pressing plate and the concrete is sigma T; the lower pressing plate is taken down, and the weight G1 of the lower pressing plate is re-measured; delta G=G1-G0 is adhesive capacity of the concrete on thelower pressing plate. The device provided by the invention is used for measuring the demoulding performance of the concrete.

Description

technical field [0001] The invention specifically relates to a device and method for measuring the demoulding performance of concrete with a pressure rod. Background technique [0002] Concrete release agent refers to a substance that is applied on the construction formwork before concrete pouring, so that the formwork will not stick to the concrete surface after pouring, it will not be easy to remove the formwork, or affect the smoothness of the concrete surface. Its main function is to form a film on the surface of formwork and concrete to isolate the two, so it is also called release agent. [0003] At present, my country has formulated the release agent standard JC / T949-2005 for concrete products. The quality evaluation index of the release agent mainly considers homogeneity and construction performance. Homogeneity refers to density, viscosity, PH value, solid content or Stability and construction performance refer to drying film forming time, mold release performance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/24G01N19/04
CPCG01N3/08G01N3/24G01N19/04G01N2203/0017G01N2203/0025
Inventor 杨英姿徐扬
Owner HARBIN INST OF TECH
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