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Method for testing capacity of concrete resisting chlorides corroding

A concrete and chloride technology, applied in measuring devices, weather resistance/light resistance/corrosion resistance, instruments, etc., can solve the problems of inability to obtain performance parameters in time for concrete mix ratio, long concrete durability testing period, and difficulty in construction, etc. Achieve the effect of shortening the detection and evaluation cycle, speeding up the hydration reaction speed, and shortening the detection cycle

Inactive Publication Date: 2007-12-05
CCCC SHANGHAI THIRD HARBOR SCI RES INST CO LTD +3
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Problems solved by technology

Once the test results fail, it will cause considerable losses
At present, all parties in engineering applications feel that the testing cycle of concrete durability is too long, and the adjustment of concrete mix ratio during construction cannot obtain performance parameters in time, and it is difficult to meet the needs of construction.

Method used

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  • Method for testing capacity of concrete resisting chlorides corroding
  • Method for testing capacity of concrete resisting chlorides corroding
  • Method for testing capacity of concrete resisting chlorides corroding

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Embodiment Construction

[0043] The concrete durability index used in the present invention refers to the concrete electric flux and the chloride ion diffusion coefficient, and the concrete durability index has the same meaning as the concrete chloride ion erosion resistance index, and W / B refers to the weight ratio of water and gel material.

[0044] Thermal curing method among the present invention is:

[0045] (1) Preparation of concrete specimens

[0046] The standard size of the concrete specimen is 100±1mm in diameter and h=50±2mm in height. When making in the laboratory, it is generally possible to use a test mold with a diameter of 100mm and a height of h=51mm to form a concrete specimen. The thermal curing test requires 6 standard specimens, 3 for testing the electric flux and 3 for testing the diffusion coefficient.

[0047] Concrete test blocks were formed according to the requirements of "Technical Code for Corrosion Protection of Concrete Structures in Harbor Engineering" (JTJ 275-200...

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Abstract

The invention discloses a kind of method of testing the concrete erosion-chloride resisting ability. It is characterized in that: concluding the follow steps: A. makes the concrete material after hot curing at 60-90deg.C as the test piece and at time of hot curing the weight ratio of the water and the jelling material is 0.28-0.54; B. after hot curing the concrete assays the value of flux and chloride ion diffusion coefficient individually; C. accords the formula Qstandard=M+NQhot to impute the value of concrete flux with the standard curing and in the formula Qstandard is the value of concrete flux with the standard curing and the Qhot is the flux measured at step B and the M,N are constants; D. accords the formula Destandard=M1+N1Dehot to calculate the chloride ion diffusion coefficient of standard curing concrete and in the formula Destandard is the value of chloride ion diffusion coefficient of standard curing concrete and the Dehot is the chloride ion diffusion coefficient measured at step B and the M1,N1 are constants. The method of the invention can test the concrete erosion-chloride resisting ability quickly.

Description

technical field [0001] The invention relates to a method for testing the ability of concrete to resist corrosion by chlorides. Background technique [0002] Chloride ions corrode concrete and lead to the corrosion of steel bars, which is one of the most important factors for the durability failure of concrete structures. In recent years, the research and exploration of its damage mechanism, model prediction, test detection, preventive repair, etc. have been carried out in depth around the world, and fruitful results have been achieved. The test method of chloride ion permeability test is used as the inspection and evaluation means and objective basis for the main indicators of concrete durability. It is very important to determine a scientific, reasonable, reliable and effective test method. [0003] The transmission mechanism of chloride ions in actual engineering concrete is very complicated, and the main processes include: diffusion, penetration, convection, capillary ad...

Claims

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Application Information

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IPC IPC(8): G01N17/00G01N33/38
Inventor 王成启周亚平汪冬冬吴丹刚胡力平王陆君
Owner CCCC SHANGHAI THIRD HARBOR SCI RES INST CO LTD
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