阅读说明：本技术 一种基于3d打印的渗透性地砖的制备方法 (Preparation method of permeable floor tile based on 3D printing ) 是由 田威 王亚威 肖煜强 汤云坤 高芳芳 于 2019-10-10 设计创作，主要内容包括：本发明公开了一种基于3D打印的渗透性地砖的制备方法,包括以下步骤：步骤1,根据实验要求,设定砖体试样内部裂隙的尺寸、倾角和分布,以及砖体试样形状,利用计算机建立含裂隙砖体的三维数字结构模型；步骤2,选择砖体试样制作需要的粉末状原料,包括砖体孔隙材料、骨架材料、填充材料和胶结剂；步骤3,将建立含裂隙砖体的三维数字结构模型输入到3D打印机中,利用3D打印机采用多喷头进行含柱状裂隙砖体试样的打印；步骤4,对含柱状裂隙砖体试样进行后期处理,即得。采用该制备方法制作出来的含内置裂隙的渗透性地砖,可以准确描述内置裂隙的数量、角度、尺寸和分布等砖体试样的基本特征。(The invention discloses a preparation method of a permeable floor tile based on 3D printing, which comprises the following steps: step 1, setting the size, inclination angle and distribution of cracks in a brick sample and the shape of the brick sample according to experimental requirements, and establishing a three-dimensional digital structure model of a cracked brick by using a computer; step 2, selecting powdery raw materials required by the preparation of a brick sample, wherein the powdery raw materials comprise a brick pore material, a framework material, a filling material and a cementing agent; step 3, inputting the three-dimensional digital structure model with the crack brick body into a 3D printer, and printing the sample with the columnar crack brick body by using the 3D printer and a plurality of spray heads; and 4, performing post-treatment on the brick body sample containing the columnar cracks to obtain the brick body sample. The permeable floor tile with built-in cracks, which is manufactured by the preparation method, can accurately describe the basic characteristics of the tile body samples such as the number, the angle, the size, the distribution and the like of the built-in cracks.)

1. A preparation method of a permeable floor tile based on 3D printing is characterized by comprising the following steps:

step 1, setting the size, inclination angle and distribution of cracks in a brick sample and the shape of the brick sample according to experimental requirements, and establishing a three-dimensional digital structure model of a cracked brick by using a computer;

step 2, selecting powdery raw materials required by the preparation of a brick sample, wherein the powdery raw materials comprise a brick pore material, a framework material, a filling material and a cementing agent;

step 3, inputting the established three-dimensional digital structure model containing the fractured brick body into a 3D printer, and printing the sample containing the columnar fractured brick body by using the 3D printer through a plurality of spray heads;

and 4, performing post-treatment on the brick sample containing the columnar cracks to obtain a three-dimensional model of the permeable floor tile containing the cracks.

2. The method for preparing the permeable floor tile based on 3D printing according to claim 1, wherein in the step 2, the tile body pore material is a grid supporting material, the framework material is sand powder, the filling material is clay powder, and the cementing agent is furan resin.

3. The method for manufacturing the permeable floor tile based on 3D printing according to claim 2, wherein the powdered material has a particle size of 0.2mm in step 2.

4. The method for preparing the permeable floor tile based on 3D printing according to claim 2, wherein the step 3 is specifically as follows: a brick body sample is manufactured by adopting a three-dimensional ink-jet process, a powder spreading roller uniformly spreads sand powder in a powder feeding cylinder on a working piston, a spray head of a 3D printer sprays cementing agent on the sand powder according to the shape of a section preset by a computer for bonding and compacting, then the powder spreading roller lays and bonds the same layer of argil powder, and the brick body sample is uniformly formed layer by layer from bottom to top by spreading a layer of sand powder and argil powder and spraying a layer of cementing agent for bonding.

5. The method for preparing a permeable floor tile based on 3D printing according to claim 4, wherein in step 3, when the 3D printer control system identifies the solid structure of the tile body, the powder spreading rollers of the corresponding sand powder and clay powder start to operate, and the sand powder and clay powder are spread and sprayed with the adhesive to form the solid structure; when the 3D printer control system identifies the crack, the 3D printer defaults to adding the grid supporting material to form a crack structure.

6. The method for preparing the permeable floor tile based on 3D printing according to claim 1, wherein the post-processing method in step 4 is: and (3) brushing off redundant powder on the surface of the brick sample containing the columnar cracks, standing and drying at high temperature.

7. The method for preparing the permeable floor tile based on 3D printing according to claim 6, wherein the high temperature drying temperature is 105-120 ℃ and the high temperature drying time is 6-8h in step 4.

8. The method for preparing the permeable floor tile based on 3D printing according to claim 1, wherein in step 1, a three-dimensional digital structure model of the cracked tile body is established by using 3Dmax software and output in STL format.

Technical Field

The invention relates to the technical field of geotechnical engineering, in particular to a preparation method of a permeable floor tile based on 3D printing, and the obtained permeable floor tile can be used for sponge city construction.

Background

Along with the continuous progress of urbanization, Chinese cities are easy to encounter flood disasters and other problems, and sponge cities are born at the same time. The permeable floor tile for sponge city construction can realize the functions of water seepage, water storage, water absorption and water purification in rainy days. The brick body contains a large number of cracks and microcracks, and the number, the angle, the size and the distribution of the cracks in the brick body are different, so that the permeability performance of the brick body is complicated. The cracks contained in the brick body and the connectivity of the cracks are important factors influencing the permeability and the strength of the brick body.

3D printing is one of the rapid prototyping technologies, which is a technology for constructing an object by using an adhesive material such as powdered metal or plastic and the like in a layer-by-layer printing manner on the basis of a digital model file. In recent years, the 3D printing technology is regarded as a landmark technology of the third industrial revolution, and the brick containing a specific built-in crack can be printed by the 3D printing technology, so that the permeability of the brick can be researched, and a new idea is developed for the permeability research of various rocks and soil bodies in the geotechnical engineering field.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a preparation method of a permeable floor tile based on 3D printing, which solves the problems that internal cracks are difficult to prepare in the existing preparation method of a brick sample, so that the permeability is increased and the cracks store water.

In order to achieve the purpose, the invention is realized by adopting the following technical scheme.

A preparation method of a permeable floor tile based on 3D printing comprises the following steps:

step 1, setting the size, inclination angle and distribution of cracks in a brick sample and the shape of the brick sample according to experimental requirements, and establishing a three-dimensional digital structure model of a cracked brick by using a computer;

step 2, selecting powdery raw materials required by the preparation of a brick sample, wherein the powdery raw materials comprise a brick pore material, a framework material, a filling material and a cementing agent;

step 3, inputting the established three-dimensional digital structure model containing the fractured brick body into a 3D printer, and printing the sample containing the columnar fractured brick body by using the 3D printer through a plurality of spray heads;

and 4, performing post-treatment on the brick sample containing the columnar cracks to obtain a three-dimensional model of the permeable floor tile containing the cracks.

Preferably, in step 1, 3Dmax software is used to build a three-dimensional digital structure model of the cracked brick body, and the model is output in STL format.

Preferably, in the step 2, the brick pore material is a grid support material, the framework material is sand powder, the filling material is clay powder, and the cementing agent is furan resin.

Preferably, in step 2, the particle size of the powdery raw material is 0.2 mm.

Preferably, step 3 specifically comprises: a brick body sample is manufactured by adopting a three-dimensional ink-jet process, a powder spreading roller uniformly spreads sand powder in a powder feeding cylinder on a working piston, a spray head of a 3D printer sprays cementing agent on the sand powder according to the shape of a section preset by a computer for bonding and compacting, then the powder spreading roller lays and bonds the same layer of argil powder, and the brick body sample is uniformly formed layer by layer from bottom to top by spreading a layer of sand powder and argil powder and spraying a layer of cementing agent for bonding.

Preferably, in step 3, when the 3D printer control system identifies the brick solid structure, the powder spreading rollers of the corresponding sand powder and clay powder start to operate, spread the sand powder and clay powder and spray a binder to form the solid structure; when the 3D printer control system identifies the crack, the 3D printer defaults to adding the grid supporting material to form a crack structure.

Preferably, in step 4, the post-processing method is as follows: and (3) brushing off redundant powder on the surface of the brick sample containing the columnar cracks, standing and drying at high temperature.

Further preferably, in the step 4, the temperature of the high-temperature drying is 105-120 ℃, and the time of the high-temperature drying is 6-8 h.

Compared with the prior art, the invention has the beneficial effects that:

(1) the preparation method of the permeable floor tile based on 3D printing can accurately control the size, the shape and the distribution condition of the built-in cracks of the permeable floor tile, has the advantages of simple preparation method, low cost, environment-friendly preparation process, sound absorption and noise reduction, avoids the defects of poor economy, environmental pollution and the like in the traditional method, and simultaneously has the advantages of easy operation, high repeatability, similar sample characteristics and reliable result in indoor tests.

(2) The method utilizes the 3D printing technology to simultaneously print the skeleton, the filling structure and the sample cracks of the permeable floor tile sample, and finally the sample contains cracks when being formed. Wherein, the skeleton structure that uses sand powder to form can guarantee the intensity of permeability ceramic tile sample, and the filling structure that uses argil powder to form has the effect of retaining water and reinforcing permeability.

(3) The permeable floor tile obtained by the method has the functions of water seepage, water storage, water absorption and water purification, can be used for sponge city construction, and can accurately control the basic characteristics such as the number, angle, size, distribution and the like of the built-in cracks, so that the permeability characteristic of the permeable floor tile can be controlled, and a novel method is provided for researching the permeability of rock and soil.

Drawings

The invention is described in further detail below with reference to the figures and specific embodiments.

Fig. 1 is a flow chart of a method for manufacturing a 3D printing-based permeable floor tile according to the present invention;

FIG. 2 is a three-dimensional effect of the permeable floor tile having through-cracks made according to example 1;

FIG. 3 is a top plan view of the permeable floor tile having through-cracks made according to example 1;

FIG. 4 is a three-dimensional effect graph of the permeable tile with closed crevices of example 2;

fig. 5 is a top plan view of the permeable tile with closed crevices of example 2.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention.

The following describes in detail the method for producing a brick sample capable of producing a small, closed and through crack according to the present invention with reference to the accompanying drawings. According to experimental research, the proportion of the cross-sectional area of the through crack to the total area of the cross section of the brick body is about 0.05 per thousand, the proportion of the cross-sectional area of the closed crack to the total area of the cross section of the brick body is about 5 per thousand, meanwhile, the shape characteristic of the end part of the crack is circular, the permeability can be better met, the strength of a brick body sample can be ensured, and the uniformity of the strength and the permeability of the brick body sample can be better ensured when the distribution distance between the crack and the crack is about 30 mm.