Construction method for ion diffusion model of cement based composite material

A composite material and ion diffusion technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as long calculation time

Inactive Publication Date: 2013-12-11
HOHAI UNIV
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  • Abstract
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Problems solved by technology

Although these computer models can consider the microstructure information of materials, they require a long calculation time and have high requirements for computer memory and calculation speed.

Method used

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  • Construction method for ion diffusion model of cement based composite material
  • Construction method for ion diffusion model of cement based composite material
  • Construction method for ion diffusion model of cement based composite material

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Embodiment Construction

[0035] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0036] Based on the microstructure evolution of cement-based composite materials, the present invention establishes a three-dimensional lattice transmission network model for predicting its diffusion behavior, and the model can be used to predict the ion diffusion performance of cement-based composite materials with parameters such as water-cement ratio and hydration age. Variety.

[0037] The method for obtaining the ion diffusion coefficient of the cement-based composite material of the present invention specifically comprises the following steps:

[0038] Step 1. Construct the three-dimensional lattice ion transport network of the cement-based composite material to be tested, as follows:

[0039] Step 1-1, obtaining the microscopic / microscopic continuous structure of the cement-based composite material and discretizing it;

[0040] The micro / meso c...

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Abstract

The invention discloses a construction method for an ion diffusion model of cement based composite material. According to a cement based composite material microcosmic / meso-structure discretized into a series of equally-sized cube three-dimensional space grids, each pair of adjacent cube three-dimensional space grids with ion diffusion capability therebetween is used as one lattice diffusion unit, all the lattice diffusion units together construct a three-dimensional lattice ion transport network, and each grid is used as one diffusion node. The invention also discloses an acquiring method for an ion diffusion coefficient of the cement based composite material. Diffusion matrix equations of every two diffusion nodes in the three-dimensional lattice ion transport network are combined with ion concentration boundary conditions to build ion diffusion matrix equations, the diffusion matrix equations are solved to obtain an ion concentration distribution under steady state, and the ion diffusion coefficient is finally obtained. The construction method for the ion diffusion model of the cement based composite material is broad in application range and simple in algorithm and has important significance to the ion diffusion research of cement based material.

Description

technical field [0001] The invention relates to a method for constructing an ion diffusion model of a cement-based composite material, and a method for obtaining an ion diffusion coefficient based on the ion diffusion model constructed by the method, belonging to the field of cement-based composite materials. Background technique [0002] Harmful ions (SO 4 2+ , Cl – etc.) The speed of intrusion into the interior of cement-based composite materials is one of the important factors determining the durability of civil engineering materials and structures, and the diffusion coefficient of these ions in cement-based composite materials is one of the key parameters related to the service life of civil engineering materials. [0003] The existing models for predicting the ion diffusion coefficient of cement-based composites mainly include empirical models, analytical models and numerical models. The empirical model established on the basis of the test generally obtains the diffu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 刘琳赵海涛沈德建蒋建华
Owner HOHAI UNIV
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