Inner mass transfer computing method of concrete under environment and material physical and chemical intrinsic action

A technology of physical chemistry and calculation method, applied in the field of calculation of mass transfer in concrete, can solve problems such as establishing theoretical models

Active Publication Date: 2019-01-18
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, previous research work often focused on the metaphysical transport model, and did not establish a corresponding theoretical model from the nature of the transport process.

Method used

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  • Inner mass transfer computing method of concrete under environment and material physical and chemical intrinsic action
  • Inner mass transfer computing method of concrete under environment and material physical and chemical intrinsic action
  • Inner mass transfer computing method of concrete under environment and material physical and chemical intrinsic action

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specific Embodiment approach 1

[0044] Specific implementation mode 1: This implementation mode discloses a calculation method for mass transfer in concrete under the action of the environment and the physical and chemical nature of materials, which specifically includes the following steps:

[0045]Step 1: Based on the nature of physical and chemical interactions in the transport process of cement-based materials under the action of erosive environments, the thermodynamic model of the physical and chemical interactions between the mesopore solution and hydration products of cement-based materials is coupled into the Nernst-Planck equation considering the water convection effect, At the same time, the effect of moisture transport and the effect of porosity changes on the transport performance of cement-based materials are considered; among them, the role of moisture transport is reflected in two aspects: one is that the transport of water drives the migration of ions; The influence of the diffusion coefficien...

specific Embodiment approach 2

[0048] Specific embodiment two: This embodiment is a further description of specific embodiment one. This embodiment discloses a calculation method for mass transfer in concrete under the action of the environment and the physical and chemical nature of materials, which specifically includes the following steps:

[0049] Step 1: Based on the nature of physical and chemical interactions in the transport process of cement-based materials under the action of erosive environments, the thermodynamic model of the physical and chemical interactions between the mesopore solution and hydration products of cement-based materials is coupled into the Nernst-Planck equation considering the water convection effect, At the same time, the effect of moisture transport and the effect of porosity changes on the transport performance of cement-based materials are considered; among them, the role of moisture transport is reflected in two aspects: one is that the transport of water drives the migrati...

specific Embodiment approach 3

[0053] Specific implementation mode three: This implementation mode is a further description of specific implementation mode one. This implementation mode discloses a calculation method for mass transfer in concrete under the action of the environment and the physical and chemical nature of materials, which specifically includes the following steps:

[0054] Step 1: Based on the nature of physical and chemical interactions in the transport process of cement-based materials under the action of erosive environments, the thermodynamic model of the physical and chemical interactions between the mesopore solution and hydration products of cement-based materials is coupled into the Nernst-Planck equation considering the water convection effect, At the same time, the effect of moisture transport and the effect of porosity changes on the transport performance of cement-based materials are considered; among them, the role of moisture transport is reflected in two aspects: one is that the...

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Abstract

The invention records an inner mass transfer computing method of concrete under environment and material physical and chemical intrinsic action. The method specifically comprises the following steps:S1, coupling a thermodynamic model of physical and chemical intrinsic action between a porous solution of a cement-based material and a hydration product to a Nernst-Planck equation considering waterconvection action; S2, transferring PHREEQC to calculate the thermodynamic model between the porous solution and the hydration product through an MATLAB language and calculate Nernst-Planck equation and the water convection action by COMSOL, and achieving interaction therebetween; and S3, representing hydration products of water, porous solution ion concentration and hydration product content in the cement-based material according to the calculation result. The method belongs to the field of civil engineering materials. The numerical value model can provide the most intuitive theoretical ground for durability design of the cement-based material and prediction of service life of a reinforced concrete structure.

Description

technical field [0001] The invention belongs to the field of civil engineering materials, and in particular relates to a method for calculating mass transfer in concrete under the action of the physical and chemical nature of the environment and materials. Background technique [0002] For a long time now and in the future, reinforced concrete structures are playing an extremely important role as the main structural form in the field of civil engineering. In recent years, with the rapid development of my country's economy and society, my country has been and will be in the construction of large-scale infrastructure for a long time, and concrete projects with a large investment of tens of billions have just been completed, or are under construction, or are in the process of being designed. For example, the Hangzhou Bay Cross-sea Bridge with a total length of 36km was completed and opened to traffic in 2008; the Qingdao Jiaozhou Bay Bridge with a total length of 34.48km was co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16C20/10G16C20/30
Inventor 乔国富郭冰冰欧进萍
Owner HARBIN INST OF TECH
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