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A Method for Measuring Expansion Compressive Stress of Expansive Cement Slurry

A technology of expansion pressure stress and cement slurry, which is applied in the direction of measuring force, measuring devices, instruments, etc., can solve the problem of not measuring the expansion pressure stress of expansion cement slurry, and achieve the effect of saving expansion agent raw materials and accurate measurement results

Active Publication Date: 2018-03-16
泰州市海通资产管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for measuring the expansion pressure stress of expansion cement slurry, which can solve the problem of not measuring the expansion pressure stress of expansion cement slurry, and can measure the expansion pressure stress of different expansion agent contents, which can be used for rock mass Numerical simulation parameter assignment provides a basis for accurate measurement results

Method used

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  • A Method for Measuring Expansion Compressive Stress of Expansive Cement Slurry
  • A Method for Measuring Expansion Compressive Stress of Expansive Cement Slurry
  • A Method for Measuring Expansion Compressive Stress of Expansive Cement Slurry

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Embodiment 1

[0029] A method for measuring expansive cement slurry expansion compressive stress, the method may further comprise the steps:

[0030] Step 1: drilling: drill a plurality of cylindrical holes 2 at regular intervals on the surrounding rock mass 1, such as figure 1 shown;

[0031] Step 2: prepare expansive cement slurry: prepare a plurality of expansive cement slurries with different mass contents of expansive agent, the quantity of expansive cement slurry is the same as the quantity of cylinder hole 2;

[0032] Take by weighing 3 groups of cement with the label of 42.5 with an electronic scale, and the weights are 1700 grams, 1500 grams, and 1300 grams respectively; the weights are 300 grams, 500 grams, and 700 grams of expansion agent; weigh three groups of warm water (about 50 degrees Celsius) ), each group of 600 grams; three groups of cement, expansion agent and warm water were mixed in turn to form one group of expansion cement slurry with expansion agent content of 15%,...

Embodiment 2

[0059] It is also possible to drill 6 cylindrical holes 2 at regular intervals on the surrounding rock mass 1 to prepare expansive cement slurries with different mass contents of the expansive agent, and pour the expansive cement grout with the same mass content of the expansive agent into the two cylindrical holes 2 respectively. According to the above method, the test is carried out, the data are collected, the average value of the two sets of compressive stress data of the expansive cement slurry with the same mass content of the expansive agent is taken, and the compressive stress of the expansive cement slurry with different mass content of the expansive agent is drawn over time. Stable value and limit value of compressive stress, that is, the measured expansion compressive stress of expansive cement slurry.

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Abstract

Provided is a method for measuring expansion cement slurry expansion pressure stress. The method comprises the following steps that 1, hole drilling is conducted; 2, expansion cement slurry is prepared; 3, grouting is conducted; 4, multiple pressure sensor sets are equidistantly arranged on the portions, in different depths from portholes, in all cylindrical holes; 6, the multiple pressure sensor sets are connected with a pressure collection system, and pressure data at different times after the expansion cement slurry is grouted is collected; 7, an image that the expansion cement slurry pressure stress of expanding agents with different mass content changes with the time is drawn according to the pressure data collected in the sixth step, and expansion pressure stress stable value and limit value are obtained, that is to say, the expansion cement slurry expansion pressure stress is measured. According to the method for measuring the expansion cement slurry expansion pressure stress, the problem that the expansion cement slurry expansion pressure stress in not measured can be solved, the expansion pressure stress of the expanding agents with different content can be measured, a basis can be provided for a rock mass numerical simulation parameter valuation, and the measuring result is accurate.

Description

technical field [0001] The invention relates to a method for measuring the expansion pressure stress of expansion cement slurry. Background technique [0002] Expansive agents are widely used in today's building construction, and their main function is to compensate for the dry and cold shrinkage of concrete during hardening. In order to improve some related properties of concrete in the project, the expansion agent can be applied to reinforced concrete structural projects related to waterproofing, such as underground, hydraulic engineering, marine engineering, subway, tunnel, etc., to improve the compactness, impermeability, and Abrasion resistance, and gripping force on steel bars, etc. At present, the expansion cement slurry is gradually applied in the support engineering. The expansion cement slurry can be used for the bolt and anchor body, and its lateral expansion performance can be used to improve the pullout resistance of the bolt. At the same time, it can also meet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/00
CPCG01L1/00
Inventor 刘杰苑腾飞王连王飞雷岚秦勇虎义平杨炫璇彭麟显李为
Owner 泰州市海通资产管理有限公司