A device and method for preparing cement stone microscopic samples and testing bending and tensile strength

A technology of bending and tensile strength and cement stone, which is applied in the field of equipment for preparation and bending and tensile strength testing, can solve the problems that the mechanical properties of cement stone cannot be measured, the accuracy of the experiment cannot be guaranteed, and the accuracy of the evaluation result is reduced, so as to ensure the accuracy The effect of high stability, saving test time, and high-quality preparation

Active Publication Date: 2021-12-24
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, starting from the multi-scale analysis method, there are still some problems in the use of nano-indentation instrument to test the micro-mechanical properties of cement stone. Reflects the physical properties of a certain hydration product in cement stone, but cannot measure the mechanical properties of the complex system of cement stone; in addition, the nano-indentation instrument using a pointed indenter cannot accurately center on the top of micro-nano particles, "Slipping needle" or "biased needle" may occur, and the accuracy of the experiment cannot be guaranteed
In addition, the local indentation deformation of the indenter, the deflection of the micro-cantilever beam along the width direction of the section, and the deflection of the beam support will increase the effective deflection and reduce the accuracy of the evaluation results.
[0006] In summary, the inventors have found that currently, at the microscopic scale, there is a lack of a device for preparing cement paste (ie, cement stone) and testing its mechanical properties

Method used

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  • A device and method for preparing cement stone microscopic samples and testing bending and tensile strength
  • A device and method for preparing cement stone microscopic samples and testing bending and tensile strength
  • A device and method for preparing cement stone microscopic samples and testing bending and tensile strength

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Embodiment 1

[0054] In a typical embodiment of the present invention, such as figure 1 As shown, a device for preparation of cement stone microscopic samples and bending and tensile strength testing is proposed, including a workbench 9 on which a grinding and cutting component 1, a testing component 2, a microscopic observation component 3, a manipulation component 4, Support frame 5, console 6, display 7, chute track 8; support frame 5 and chute track 8 are all fixed on the workbench, and the workbench and chute track are respectively provided with drain holes 10 for discharging waste liquid.

[0055] like Figure 5 As shown, the support frame 5 includes two columns 11 , two beams and a telescopic rod 13 , the two columns 11 are vertically opposite to each other, and the bottom ends of the two columns 11 are fixed on the workbench 9 . A first beam 12 is fixedly arranged at the top of the two columns 11; a second beam 37 is arranged on the top of the two columns, the second beam is locate...

Embodiment 2

[0074]In this embodiment, a method for preparing a cement stone microscopic sample and testing the bending and tensile strength is proposed, and the device for preparing a cement stone microscopic sample and testing the bending and tensile strength described in Example 1 is used.

[0075] The specific process is:

[0076] (1) After the curing period is over, remove the cement stone sample from the mold, cut it into a thin slice of cement stone sample with a thickness of 2mm with a precision cutting machine, and use isopropanol solvent to prevent hydration; use ultraviolet hardening resin (UV glue) to seal the sample Bond the sample to a glass slide (50mm×50mm×5mm in size), put the slide into the slot on the operating table, press the slide so that the slide can be firmly adsorbed on the operating table by the vacuum suction cup;

[0077] (2) Adjust the position of the console through the joystick of the table so that it is located in the middle of the left half of the chute tr...

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Abstract

The invention discloses a device and method for preparing microscopic samples of cement stone and testing the bending and tensile strength, including a workbench, a support frame and a chute track are fixedly arranged on the workbench; a grinding and cutting assembly is fixedly arranged on the support frame for Grinding and cutting the sample to form a sample, and the support frame is also fixedly equipped with a test component to test the bending and tensile strength of the sample; the grinding and cutting component and the test component are both located above the chute track, and are used to fix the sample or the operating table of the sample It is set on the chute track and can move along the chute track.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a device and a method for preparing cement stone microscopic samples and testing bending and tensile strength. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Nowadays, concrete materials have been widely used in modern civil engineering constructions such as buildings, ocean ports, roads and bridges, and water conservancy and electric power. In recent years, engineering construction has developed in the direction of giant, long-span and special structures, and infrastructure has gradually expanded to complex and harsh engineering environments, such as cross-sea bridges, submarine tunnels and other projects, which put forward higher requirements for the service performance of concrete. However, during the long-term use of concrete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/20G01N1/28
CPCG01N3/20G01N1/286G01N2203/0023
Inventor 孙仁娟刘赫然吴建清田隽梁峰张洪智王凯葛智袁化强方晨鲁纬李振寰
Owner SHANDONG UNIV
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