A Generation Algorithm of Microscopic Digital Model of Cement Paste

A technology of cement slurry and microscopic model, which is applied in the fields of electrical digital data processing, calculation, special data processing application, etc., can solve the problem of ignoring the internal connection of concrete, and achieve the effect of improving the recognition efficiency and improving the recognition efficiency.

CN103425898BActive Publication Date: 2017-01-11JINLING INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-01-11

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Abstract

The invention provides a cement paste microcosmic digital model generating algorithm which aims at meeting the requirements for current cement-based material hydration reaction research and early-phase material performance prediction and achieving the purposes of being reasonable, clear in concept and high in fitting rate. The grain sizes and the centroid positions of all kinds of microcosmic particles in cement paste are generated according to the Monte Carlo method, cell unit attribute identification can be achieved according to the occupied area exclusion method, and a cyclic boundary is used for simulating a real boundary environment of a digital model. According to the cement paste microcosmic digital model generating algorithm, the microcosmic digital model suitable for cement-based hydration reaction research and early-phase material performance prediction can be built. The cement paste microcosmic digital model generating algorithm is simple, capable of enabling the identification method to be rapid and convenient, high in model fitting rate, clear in concept, and capable of being easily mastered and expanded by a user.
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Description

technical field

[0001] The invention belongs to the technical field of concrete microscopic digital test pretreatment, and specifically relates to a concrete microscopic model generation algorithm based on a cyclic boundary and area-occupied elimination method, and the generated model can be used for numerical simulation of the concrete hydration process. Background technique

[0002] Concrete is a heterogeneous material with multiple phases and scales. It is composed of cement particles as small as microns and coarse aggregates of several centimeters and tens of centimeters. The internal structure is very complex. During the hydration process, nanoscale calcium silicate hydrate gels and pores between colloidal particles will be generated inside the concrete, and the above three phases of solid, liquid and gas coexist in the cement-based material and are distributed in a disordered state. Traditional research idealizes concrete as a homogeneous continuum, ignoring the intrin...

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Embodiment Construction

[0057] The present invention will be further described below in combination with specific embodiments.

[0058] The main step flow chart of the present invention is as figure 1 Shown, the specific implementation method of the present invention is illustrated below in conjunction with the accompanying drawings:

[0059] Step 1, the establishment of a side length of L μm cement slurry microscopic cube model, the unit grid size is equal to 1 μm;

[0060] Step 2, read in the water-cement ratio of the simulated cement slurry, the content of the four major mineral components and their particle size distribution;

[0061] Step 3, calculate cement particle volume by formula (1);

[0062] Step 4, cycle through the four types of mineral components, and calculate the volume V of the mineral components i , and generate the particle size of each particle of the mineral component in turn according to its particle size distribution requirements (unit μm, rounded):

[0063] Step 5, determ...