Plastering gypsum and preparation method thereof

A technology of plastering gypsum and anti-cracking agent, which is applied in the field of building materials and can solve problems such as hollowing, cracking and cracking of gypsum-based plastering screeds

Active Publication Date: 2015-12-09
MEICHAO GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plastering gypsum sometimes has quality problems such as cracking, hollowing, low strength, and falling powder in practical applications
In view of the above-mentioned engineering quality proble

Method used

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  • Plastering gypsum and preparation method thereof
  • Plastering gypsum and preparation method thereof
  • Plastering gypsum and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0050] The application also provides a preparation method for plastering gypsum, comprising the following steps:

[0051] Mix 80wt%-95wt% of heavy calcium powder with the rest of aramid fibers to obtain an anti-cracking agent;

[0052] 40-60 parts by weight of construction gypsum, 32-55 parts by weight of quartz sand, 5-20 parts by weight of heavy calcium powder, 0.35-1.50 parts by weight of tackifier, 0.05-0.50 parts by weight of water-retaining agent, 0.02- 0.08 parts by weight of retarder, 0.10-0.50 parts by weight of plasticizer, 1.0-10.0 parts by weight of anti-cracking agent and 0.0-5.0 parts by weight of light filler are mixed to obtain plastering gypsum.

[0053] The applicant first prepared the anti-cracking agent. In order to obtain a uniform mixture, the applicant preferably puts the heavy calcium powder, wood fiber and aramid fiber into a high-speed high-efficiency mixer, and the high-speed stirring speed is 2000rpm. This application firstly prepares an anti-crack...

Embodiment 1

[0058] In the following examples, the water consumption, setting time, compressive strength, flexural strength, bond strength and water retention rate of the standard diffusion degree of plastering gypsum are tested according to the provisions of the national standard GB / T28627-2012 "Plastering Gypsum" .

[0059] The test method of the anti-crack performance of anti-crack plaster plaster of the present invention is:

[0060] Prepare the slurry of plastering gypsum according to the standard diffusion degree of water. Scrape and scrape a slope with a length of 300mm, a width of 50mm, and a slope of 1 / 15 on the cotton-free fiber cement board, and place it in the test environment with wind speeds of 0m / s, 0.5m / s, and 2.5m / s respectively, and last for 6 hours , Observe the cracks on the surface of the plastering plaster: the thickness and range of the cracks, and the shape of the cracks.

[0061] Add 90.0Kg of heavy calcium powder, 5.0kg of wood fiber, and 5.0kg of 0.8mm aramid f...

Embodiment 2

[0073] Add 90.0Kg of heavy calcium powder, 5.0kg of wood fiber, and 5.0kg of 0.8mm aramid fiber into the high-speed mixer, and stir at a high speed (2000rpm) until a uniform mixture is obtained, which is the anti-cracking agent. Put it in a plastic bag and seal it for later use.

[0074] 470.0Kg of building gypsum, 429.6Kg of quartz sand, 50kg of heavy calcium powder, 2.0kg of plasticizer SD601P, 2.0kg of water retaining agent CCA3282.0kg, 0.4kg of retarder P powder, 6.0kg of tackifier 60W, 20.0kg of anti-cracking agent, Add 20kg of light filler into the powder mixer one by one, stir for 15 minutes, mix evenly, and it becomes powder. Pack airtightly in a plastic bag. The standard expansion degree water consumption of the crack-resistant plastering gypsum in this embodiment is 32%.

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Abstract

The invention provides plastering gypsum which includes, by weight, 40-60 parts of building gypsum, 32-55 parts of quartz sand, 5-20 parts of heavy calcium powder, 0.35-1.50 parts of a tackifier, 0.05-0.50 parts of a water retention agent, 0.02-0.08 parts of a set retarder, 0.10-0.50 parts of a plasticizer, 1.0-10.0 parts of an anti-cracking agent and 0.0-5.0 parts of a light-weight filling material, wherein the anti-cracking agent includes 80-95 wt% of heavy calcium powder and the balanced being aramid fiber. The plastering gypsum is added with the anti-cracking agent, so that the plastering gypsum is improved in anti-crack toughness. In addition, the plastering gypsum is also added with the light-weight filling material, which can dissipate shrinkage stress generated by volume reduction of the plastering gypsum due to moisture volatilization, thereby further ensuring a leveling layer of the plastering gypsum to be free of cracking. The invention also provides a preparation method of the plastering gypsum.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to plastering gypsum and a preparation method thereof. Background technique [0002] Plastering gypsum is a high-efficiency and energy-saving plastering and leveling material for interior walls and ceilings of buildings, which is made of gypsum as the main cementitious material and processed by adding sand, admixtures and special compound additives. For thousands of years, plastering gypsum has been widely used for leveling and decoration of interior walls and roofs all over the world. About 2500 BC, that is, 4500 years ago, the decoration of the walls in the pyramid of Giza (Giza) in Egypt used stucco plaster. Plastering plaster, dated to about 9000 BC. For modern construction technology, plastering gypsum mainly replaces plastering materials such as cement and lime mortar, and is suitable for various walls. Compared with cement mortar and lime mortar, plastering gyps...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B14/06C04B14/28C04B16/06
Inventor 赵守佳杨福成田翠沈靖
Owner MEICHAO GROUP
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