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A fiber-reinforced gypsum composite material with ultra-high ductility and its preparation method

A technology of composite materials and fiber gypsum, applied in the field of building materials, can solve the problems of low ductility and toughness, achieve the effect of improving the low toughness of gypsum, low economic cost, and expanding the application field

Active Publication Date: 2021-02-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently common fiber-reinforced gypsum composites have low ductility and toughness

Method used

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  • A fiber-reinforced gypsum composite material with ultra-high ductility and its preparation method
  • A fiber-reinforced gypsum composite material with ultra-high ductility and its preparation method
  • A fiber-reinforced gypsum composite material with ultra-high ductility and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Contain 3 products in this example, and its serial number is recorded as 1-1, 1-2, 1-3 respectively.

[0036] In this embodiment, the fiber-reinforced gypsum composite material with ultra-high ductility includes β-type gypsum powder, retarder, thickener, tap water and polyethylene fiber. Each component is shown in Table 1 below, and each part in the table is the content in parts by weight. In Table 1, the polyethylene fiber has a length of 18 mm and an aspect ratio of 700.

[0037] Table 1 product components and parts by weight content

[0038] label β type gypsum powder retarder thickener water polyethylene fiber 1-1 1635 1.5 4 600 15 1-2 1635 1.5 4 600 20 1-3 1635 1.5 4 600 25

[0039] The preparation process of the fiber reinforced gypsum composite material in this example is as follows:

[0040] (1) Add 1635 parts of gypsum powder and 1.5 parts of retarder into the mixer, stir the dry powder for 2-3 minutes, and m...

Embodiment 2

[0049] Contain 3 products in this example, and its serial number is recorded as 2-1, 2-2, 2-3 respectively.

[0050] In this example, the fiber-reinforced gypsum composite material with ultra-high ductility includes α-type gypsum powder, retarder, thickener, tap water and polyethylene fiber. The components are shown in Table 3 below, and each part in the table is by weight Part content, wherein, the polyethylene fiber length in Table 3 is 18mm, aspect ratio is 700.

[0051] Table 3 product components and parts by weight

[0052] label α type gypsum powder retarder thickener water polyethylene fiber 2-1 1720 1.5 4 600 15 2-2 1720 1.5 4 600 20 2-3 1720 1.5 4 600 25

[0053] The preparation process of the fiber-reinforced gypsum composite material with ultra-high ductility in this embodiment is as follows:

[0054] (1) Add 1720 parts of gypsum powder and 1.5 parts of retarder to the mixer, stir the dry powder for 2-3 minutes, a...

Embodiment 3

[0063] Contain three products in this example, and its serial number is recorded as 3-1, 3-2, 3-3 respectively.

[0064] In this embodiment, the fiber-reinforced gypsum composite material with ultra-high ductility includes α-type gypsum powder, cement, fly ash, retarder, thickener, tap water and polyethylene fiber. Each component is shown in Table 5 below, and each part in the table is the content in parts by weight. The polyethylene fiber in Table 5 has a length of 18 mm and an aspect ratio of 700.

[0065] Table 5 Product components and parts by weight

[0066] label α type gypsum powder cement fly ash retarder thickener water polyethylene fiber 3-1 1205 85 430 1.5 4 600 15 3-2 1205 85 430 1.5 4 600 20 3-3 1205 85 430 1.5 4 600 25

[0067] The preparation process of the fiber-reinforced gypsum composite material with ultra-high ductility in this embodiment is as follows:

[0068] (1) Add 1205 parts of gypsum powd...

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Abstract

The invention relates to a fiber-reinforced gypsum composite material with ultra-high ductility and a preparation method thereof. The gypsum composite material is prepared from the following components by weight: 1205-1720 parts of gypsum powder, 0-85 parts of cement, powder 0-430 parts of coal ash, 1-3 parts of retarder, 3-5 parts of thickener, 450-650 parts of water, 15-25 parts of polyethylene fiber. When preparing, add gypsum, cement, fly ash, and retarder to the mixer in parts by weight, stir the dry powder for 2-3 minutes, and mix well; then add water and thickener to the mixer, and after the slurry is evenly stirred, Stir in the polyethylene fibers. Finally, it is poured into a mold, cured and demoulded, and the product is obtained. Compared with existing products, the fiber gypsum of the present invention has a tensile strength of 0.8-5MPa, a tensile elongation of 5-8%, good micro-crack distribution and energy consumption performance, and uses building gypsum powder as raw material, Environmentally friendly and green, with good economy and good application prospects.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a fiber-reinforced gypsum composite material with ultra-high ductility and a preparation method thereof. Background technique [0002] Gypsum is an air-hardening cementitious material whose main component is calcium sulfate. Building gypsum is obtained by calcination and grinding of dihydrate gypsum. During the production process, energy consumption is low, no harmful substances are discharged, and the products used are green and recyclable. Moreover, the construction gypsum powder is cheap, not easily deformed after hardening, and has good sound insulation, heat insulation, fire prevention, and earthquake resistance; it is easy to process and has a breathing function; it hardens quickly and is suitable for large-scale production; it has micro-expansion, and the surface of the product is smooth. Delicate, full body, good decoration. [0003] However, due ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B16/06
CPCC04B16/0625C04B28/146C04B28/147C04B2201/50C04B24/14C04B24/2652C04B22/002C04B18/08C04B7/02
Inventor 余江滔王义超肖梅强
Owner TONGJI UNIV
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