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Plastering gypsum special for autoclaved aerated concrete products

A technology of concrete products and plastering plaster, which is applied in the field of building wall materials, can solve problems such as weak adhesion between mortar and wall materials, large shear stress on the surface of mortar and wall, and shedding, so as to improve safety and Comfort, reduce cracking and peeling, and improve the effect of bond strength

Inactive Publication Date: 2015-03-11
HENAN XIAN NEW BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] When the traditional cement-based masonry mortar is used together with new wall materials, due to the high water absorption rate of the new wall materials, when the traditional masonry mortar contacts with the new wall materials, the free water in the mortar will be quickly absorbed by the wall Material absorption, the cementitious material in the mortar cannot complete the hydration and condensation process normally due to lack of water, resulting in weak bonding between the mortar and the wall material
In addition, due to the large drying shrinkage of new wall materials, while the shrinkage of traditional mortar is very small, in the supporting wall, the shrinkage ratio of the two that cannot be synchronized will also produce a large amount of dryness on the surface of the mortar and the wall. When the stress reaches the limit, there will be building quality problems such as hollowing and falling off.

Method used

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  • Plastering gypsum special for autoclaved aerated concrete products

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A special plastering gypsum for autoclaved aerated concrete products. The mortar contains the following components in mass ratio: 250kg of construction gypsum, 700kg of fine sand, 1.0kg of water reducer, 0.3kg of retarder, 0.7kg of water retaining agent, Adhesive 0.5kg, fiber material 1.0kg. The building gypsum is the product obtained after drying the solid waste desulfurization gypsum of the power plant, calcining at 210°C for 2 hours, ball milling for 2 minutes, and aging for 3 days. The product quality meets the S 3.0 standard in GB / T 9776-2008. The fine Sand fineness ≥ 28 mesh, mud content ≤ 0.5%. The water reducer is a high-efficiency polycarboxylate water reducer with a water reducing rate ≥ 25%. The retarder is protein gypsum retarder (purchased from Zhengzhou Paini Chemical Reagent Factory). The water retaining agent is hydroxypropyl methylcellulose with a viscosity of 100000 mPa.s. The tackifier is dispersible latex powder. The fiber material is polypropyle...

Embodiment 2

[0026] A special plaster for autoclaved aerated concrete products. The mortar contains the following components in mass ratio: 280kg of construction gypsum, 750kg of fine sand, 1.0kg of water reducer, 0.5kg of retarder, 1.0kg of water retaining agent, Adhesive 0.6kg, fiber material 1.1kg. The building gypsum is the product obtained after drying the desulfurized gypsum solid waste from power plants, calcining at 210°C for 2 hours, ball milling for 2 minutes, and aging for 3 days. The product quality meets the S 3.0 standard in GB / T 9776-2008. The fineness of fine sand is ≥28 mesh, and the mud content is ≤0.5%. The water reducer is a high-efficiency polycarboxylate water reducer with a water reducing rate ≥ 25%. The retarder is a protein gypsum retarder. The water retaining agent is hydroxypropyl methylcellulose with a viscosity of 100000 mPa.s. The tackifier is dispersible latex powder. The fiber material is polypropylene fiber with an aspect ratio of 100 and an average dia...

Embodiment 3

[0028] A special plaster for autoclaved aerated concrete products. The mortar contains the following mass ratio components: 300kg of construction gypsum, 720kg of fine sand, 1.2kg of water reducer, 0.4kg of retarder, 0.8kg of water retaining agent, Adhesive 0.7kg, fiber material 1.2kg. The building gypsum is the product obtained after drying the desulfurized gypsum solid waste from power plants, calcining at 210°C for 2 hours, ball milling for 2 minutes, and aging for 3 days. The product quality meets the S 3.0 standard in GB / T 9776-2008. The fineness of fine sand should be ≥28 mesh, and the mud content should be ≤0.5%. The water reducer is a high-efficiency polycarboxylate water reducer with a water reducing rate ≥ 25%. The retarder is a protein gypsum retarder. The water retaining agent is hydroxypropyl methylcellulose with a viscosity of 100000 mPa.s. The tackifier is dispersible latex powder. The fiber material is polypropylene fiber with an aspect ratio of 100 and an ...

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Abstract

The invention relates to a plastering gypsum special for autoclaved aerated concrete products. The plastering gypsum comprises the following raw materials by weight: 250-300kg of building gypsum, 700-750kg of fine sand, 1.0-1.2kg of a water reducing agent, 0.3-0.5kg of a retarder, 0.7-1.0kg of a water retaining agent, 0.5-0.7kg of a tackifying agent, and 1.0-1.2kg of a fiber material. The invention fully utilizes the power plant waste desulfurized gypsum as the building gypsum, and fine aggregate and admixtures are incorporated to prepare the plastering gypsum special for autoclaved aerated concrete products. The plastering gypsum has the advantages of high water-retention rate, strong adhesion, slight expansion, excellent cracking resistance and the like, also has the characteristics of good fire resistance and adjustment of indoor air humidity, etc., thus further improving the construction safety and comfort.

Description

technical field [0001] The invention belongs to the technical field of building wall materials, and in particular relates to a plaster special for autoclaved aerated concrete products. Background technique [0002] In recent years, new wall materials based on autoclaved aerated concrete products have developed rapidly, replacing traditional wall materials such as clay bricks and solid bricks, and becoming the main component of wall materials. Compared with traditional wall materials, autoclaved aerated concrete products have the characteristics of light weight and excellent thermal insulation performance, but at the same time, they also have disadvantages such as large drying shrinkage and high water absorption. Therefore, the masonry mortar used in conjunction with traditional wall materials has just occurred various problems when it is used in conjunction with new wall materials. [0003] When the traditional cement-based masonry mortar is used together with new wall mate...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B14/06C04B24/38
Inventor 陈晓飞司政凯苏向东张道令董恒瑞曹林方
Owner HENAN XIAN NEW BUILDING MATERIALS
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