Unlock instant, AI-driven research and patent intelligence for your innovation.

Forming method of multi-layer gradient anti-crack cement-based material

A technology of cement-based materials and molding methods, which is applied in ceramic molding machines, ceramic extrusion dies, manufacturing tools, etc., can solve problems such as easy cracking and freeze-thaw resistance, and achieve overall compactness, low energy consumption, and production. low cost effect

Active Publication Date: 2020-06-30
CCCC WUHAN HARBOR ENG DESIGN & RES +1
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of easy cracking and poor freeze-thaw damage resistance of traditional cement-based materials, the object of the present invention is to provide a forming method for multi-layer gradient crack-resistant cement-based materials with good cracking suppression and freeze-thaw damage resistance. Cement-based materials with different material properties are poured together in layers to achieve perfect bonding between various materials, and a multi-layer gradient crack-resistant cement-based material and its preparation method are proposed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Forming method of multi-layer gradient anti-crack cement-based material
  • Forming method of multi-layer gradient anti-crack cement-based material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The multi-layer gradient anti-cracking cement-based material, the molding method thereof comprises the following steps:

[0037] Step 1. Prepare the extrusion mold and apply the release agent. The mold is divided into a left layer, a middle layer and a right layer, and the left layer, the middle layer and the right layer are respectively separated by a plexiglass plate, and the plexiglass plate The thickness is 3mm.

[0038] Step 2: Inject the ordinary mortar layer on the left side of the mold with a single-screw extruder, and the extrusion rate is 10mm / min, and by weight fraction, it includes: 100 parts of cementitious material, 300 parts of fine aggregate (the fine aggregate natural sand with a maximum particle size of 2.36 mm), 40 parts of water; the cementitious material is composed of 30 parts of Portland cement and 70 parts of fly ash by weight fraction.

[0039] Step 3. Use another single-screw extruder to inject the PVA fiber mortar layer in the middle layer of...

Embodiment 2

[0043] The multi-layer gradient anti-cracking cement-based material, the molding method thereof comprises the following steps:

[0044] Step 1. Prepare the extrusion mold and apply the release agent. The mold is divided into a left layer, a middle layer and a right layer, and the left layer, the middle layer and the right layer are respectively separated by a plexiglass plate, and the plexiglass plate The thickness is 6mm.

[0045] Step 2: Inject the common mortar layer on the left side of the mold with a single-screw extruder, the extrusion rate is 8mm / min, and by weight fraction, it includes: 100 parts of cementitious material, 300 parts of fine aggregate (the fine aggregate is Manufactured sand with a maximum particle size of 2.36 mm), 50 parts of water; the cementitious material is composed of 50 parts of sulfoaluminate cement and 50 parts of fly ash by weight fraction.

[0046] Step 3. Use another single-screw extruder to inject the PVA fiber mortar layer in the middle l...

Embodiment 3

[0050] The multi-layer gradient anti-cracking cement-based material, the molding method thereof comprises the following steps:

[0051] Step 1. Prepare the extrusion mold and apply the release agent. The mold is divided into a left layer, a middle layer and a right layer, and the left layer, the middle layer and the right layer are respectively separated by a plexiglass plate, and the plexiglass plate The thickness is 5mm;

[0052] Step 2: Inject the common mortar layer on the left side of the mold with a single-screw extruder, and the extrusion rate is 5mm / min, and by weight fraction, it includes: 100 parts of cementitious material, 300 parts of fine aggregate (the fine bone The material is natural sand with a maximum particle size of 2.36mm), 45 parts of water; the cementitious material is composed of 40 parts of ferroaluminate cement and 60 parts of fly ash by weight fraction;

[0053] Step 3. Use another single-screw extruder to inject the PVA fiber mortar layer in the mi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
particle diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a forming method of a multi-layer gradient anti-crack cement-based material. The forming method comprises the following steps that 1, a mold is prepared and coated with a release agent; 2, a common mortar layer is injected into the left side layer of the mold; 3, a PVA fiber mortar layer is injected into the middle layer of the mold; 4, a self-repairing anti-cracking layeris injected into the right side layer of the mold; and step 5, synchronously extruding of the common mortar layers, the PVA fiber mortar layers and the self-repairing anti-cracking layers in the step2, the step 3 and the step 4 is carried out, the organic glass plates between the layers after co-extrusion for 8-10 hours are removed, standing is carried out, an obtained product is taken out after24h of co-extrusion, and is put into a special curing mold for curing to a specific age. The problems that a traditional cement-based material is prone to cracking and poor in freeze-thaw damage resistance are solved.

Description

technical field [0001] The invention relates to the technical field of building engineering materials. More specifically, the invention relates to a forming method of a multi-layer gradient anti-cracking cement-based material. Background technique [0002] Cement-based materials in the traditional sense have the characteristics of poor crack resistance, low tensile-compression strength ratio, and high brittleness, and when subjected to freeze-thaw cycles or external forces, it is easy to form internal micro-cracks and surface macro-cracks, making its impermeability , Chemical corrosion resistance and sharp degradation of mechanical properties, seriously affecting the shortening of the service life of cement-based material components. [0003] Cement-based gradient functional material is a new and practical high-tech composite material developed at present. Because of a series of excellent material properties, such as improving bond strength, reducing residual stress and th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00B28B3/20B28B3/26
CPCB28B3/20B28B3/2636B28B3/269C04B28/00C04B14/06C04B18/08C04B16/0641C04B2103/0068C04B2103/302
Inventor 程书凯李顺凯邓翀汪华文屠柳青骆晚玥
Owner CCCC WUHAN HARBOR ENG DESIGN & RES