Induced cracking process for crack resistant performance test of cement base material and apparatus thereof

A cement-based material, anti-crack performance technology, applied in the direction of measuring devices, analysis materials, material inspection products, etc., can solve the problems of long test time, inaccurate test results, large randomness, etc., to achieve simple use and shorten observation time, high precision effect

Inactive Publication Date: 2005-06-29
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention solves the defects of long test time, large randomness and inaccurate test results in the prior art, and provides a short test time and high accuracy of cement-based material crack resistance performance test induced cracking method and its device

Method used

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  • Induced cracking process for crack resistant performance test of cement base material and apparatus thereof
  • Induced cracking process for crack resistant performance test of cement base material and apparatus thereof
  • Induced cracking process for crack resistant performance test of cement base material and apparatus thereof

Examples

Experimental program
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Embodiment 1

[0023] Such as figure 1 Shown: According to the size of the rectangular frame body 1 and the shrinkage of the cement-based material, in the rectangular frame body 1 constrained in one direction, set 1 to 10 pairs along the free side perpendicular to the rectangular frame body 1 with a length of 1 / 10~ 2 / 5 Frame body 1 constrains the partition board 3 with side length, and evenly divides the frame side of frame body 1, thereby reducing the cross-sectional area of ​​the corresponding section. When the cement-based material shrinks, the stress generated at this section is greater than that of other sections. section, thereby accelerating the generation of cracks and guiding cracks to be generated in this section. The position and the number of cracks that may appear are relatively determined, and the cracks appear early, develop quickly, and have a large width, which is easy to observe, with short observation time and high accuracy.

Embodiment 2

[0025] As shown in Figure 2, according to the size of the frame body 1 and the size of the shrinkage of the cement-based material, 1 to 10 pairs of partitions 3 are arranged in the rectangular frame body 1 with two-way constraints along the long frame side perpendicular to the rectangular frame body 1, The length of the partition 3 is 1 / 10 to 2 / 5 of the length of the short side of the rectangular frame 1, and the long side of the frame 1 is evenly divided into equal parts, thereby reducing the cross-sectional area of ​​the corresponding section. When the cement-based material shrinks, the The stress generated at this section is greater than that at other sections, thereby accelerating the generation of cracks and guiding cracks to be generated at this section.

Embodiment 3

[0027] As shown in Figure 3: in the rectangular frame body 1 with two-way constraints, a partition plate 3 is arranged in the middle of the four frame sides 1 along the frame side perpendicular to the frame body 1, and the length of the partition plate 3 is parallel to the frame body 1 / 10 to 2 / 5 of the frame side length of 1, thereby reducing the cross-sectional area of ​​the corresponding section.

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Abstract

This invention relates to a crack induce test method and its device of cement base material, which adopts a frame with inner isolation board with bolts to induce the cement materials to crack rapidly. It fills cement materials between the isolation board and the frame and its bolts are covered in the cement materials. The top end of the isolation plate is exposed outside the base materials and its bottom end is in the same plane with the down part of the frame.

Description

Technical field: [0001] The invention relates to an induced cracking method and a device thereof for testing the anti-cracking performance of cement-based materials. The invention can be used to quickly test the crack resistance of various cement-based materials used in civil engineering. Background technique: [0002] The crack resistance of cement-based material structures has become a matter of great concern to people, especially concrete with a wide range of applications and large quantities. However, there is still no relatively uniform method for testing the crack resistance of cement-based materials at home and abroad. The quality inspection also lacks the important link of crack resistance. The methods currently used, such as the plate method and the ring method, have their own advantages and disadvantages. The common outstanding problems are that the test time is long, the randomness is large, and it is not easy to apply. There are also foreign reports on the test...

Claims

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Application Information

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IPC IPC(8): G01N19/00G01N33/38
Inventor 郑建岚罗素蓉王雪芳王国杰
Owner FUZHOU UNIVERSITY
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