Test device and method for simulating corrosion degradation of hydraulic concrete under high hydraulic gradient

A technology of hydraulic concrete and test device, which is applied in the direction of measuring device, material inspection product, instrument, etc., to achieve the effect of reducing test cost, reducing test period and improving test efficiency

Active Publication Date: 2017-07-25
HOHAI UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved in the present invention is to provide a test device for simulating the dissolution and deterioration of hydraulic concrete under high hydraulic gradient, which can solve the existing problems. The defect that the technology cannot simultaneo

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  • Test device and method for simulating corrosion degradation of hydraulic concrete under high hydraulic gradient

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Embodiment Construction

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0047] Such as figure 1 As shown, a test device for simulating the dissolution and degradation of hydraulic concrete under a high hydraulic gradient includes a sealed box, a base 10 , a three-way loading device, an erosion liquid and a hydraulic pressure sensor 24 .

[0048] The sealed box includes a top plate 22, a bottom plate 13 and side walls.

[0049] The bottom plate is preferably fixedly connected to the ground or table top by bolts, the side wall and the bottom plate are integrally arranged, and the top of the side wall is preferably provided with an outer flange, and a sealing rubber 25 is preferably arranged between the outer flange and the top plate, and is preferably fixedly connected by bolts .

[0050] The inner cavity of the sealed box forms a sealed liquid storage chamber 30, which can be filled with corros...

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Abstract

The invention provides a test device and method for simulating corrosion degradation of hydraulic concrete under a high hydraulic gradient. A sealed tank is used for applying corrosion liquid with high hydraulic gradient to a concrete standard sample; three-direction pressure stress is applied to the concrete standard sample with combination of high-strength bolts and an axial loading rod; the pressure stress and the corrosion liquid pressure on the sample are measured by using a pressure sensor, an axial pressure sensor and a water pressure sensor which are arranged; a sealed protection chamber is used for separating the corrosion liquid from the high-strength bolts and the like, so that the loss of pre-tightening force and the damage to the pressure sensor are reduced; a high-elasticity rubber tube and a water stopping device which are arranged in an corrosion chamber are used for limiting a permeable passage. Through the test device and method, three groups of test can be simultaneously carried out, so that the test efficiency can be obviously improved; meanwhile, the operation condition that the hydraulic concrete is subjected to the action of the high hydraulic gradient and environment water for a long time can also be simulated; the evolution property of corrosion degradation of the hydraulic concrete under the action of the high hydraulic gradient can be really reflected.

Description

technical field [0001] The invention relates to the technical field of hydraulic concrete research, in particular to a test device and method for simulating the dissolution and degradation of hydraulic concrete under high hydraulic gradient. Background technique [0002] At present, most studies on the durability of hydraulic concrete structures focus on the contact corrosion test under a single load (unidirectional tension and compression, bending moment), without considering the high hydraulic gradient effect of hydraulic concrete. And related penetration test research, most of them use clear water as the medium to carry out penetration and corrosion tests under unidirectional tension and compression stress. Almost all concrete structures in actual engineering are subject to a three-dimensional stress state. On the one hand, when the stress level is low, the compressive stress will close the internal pores of the concrete and slow down the rate of dissolution and deteriora...

Claims

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Application Information

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IPC IPC(8): G01N33/38
CPCG01N33/383
Inventor 甘磊沈振中张开来唐建洲张湛张宏伟李舸航江婷曾奕滔李安东龙一飞
Owner HOHAI UNIV
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