Repair mortar specially used for low-density autoclaved aerated concrete slabs

An autoclaved aerated concrete slab technology, which is applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problem of low bonding strength, poor aesthetics, and poor constructability of repair mortar for autoclaved aerated concrete. problems, achieve the effect of improving aesthetics, reducing cracking, and wide application range

Active Publication Date: 2014-07-30
TIANJIN TIANZHU BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a special repair mortar for low-density autoclaved aerated concrete slabs to solve the problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take the raw material according to the following parts by weight:

[0021] 30 parts of white Portland cement (32.5), 50 parts of quartz sand (25 parts of 30-60 mesh, 15 parts of 40-70 mesh, 10 parts of 70-140 mesh), 15 parts of heavy calcium powder (200 mesh), autoclaved 5 parts of air-entrained concrete powder, 1 part of redispersible rubber powder, 0.2 part of hydroxypropyl methylcellulose ether (viscosity of 40000mpa·s), 0.2 part of wood fiber.

[0022] The above-mentioned repair mortar is mainly used for the repair of defects such as surface defects and scratches of autoclaved aerated concrete slabs with a depth less than 5mm.

Embodiment 2

[0024] Take the raw material according to the following parts by weight:

[0025] White Portland cement (52.5) ​​20 parts, quartz sand (30-60 mesh) 30 parts, dolomite sand (40-70 mesh) 15 parts, natural river sand (70-140 mesh) 15 parts, heavy calcium powder ( 400 mesh) 10 parts, autoclaved aerated concrete powder 10 parts, redispersible rubber powder 1.5 parts, hydroxypropyl methylcellulose ether 0.2 parts (viscosity 100000mpa s), wood fiber 0.1 part, polypropylene fiber 0.1 part.

[0026] The above-mentioned repair mortar is mainly used for repairing defects with a depth greater than 5mm, such as filling treatment of material damage such as missing edges and corners of autoclaved aerated concrete, connectors, and holes in embedded parts.

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PUM

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Abstract

The invention discloses a repair mortar specially used for low-density autoclaved aerated concrete slabs. According to a preparation method of the repair mortar, white Portland cement and sand are taken as base materials, and a filling material and a functional admixture are combined. The repair mortar comprises following ingredients, by weight, 20 to 30% of white Portland cement, 40 to 60% of sand, 0 to 15% of autoclaved aerated concrete milled powder, 0 to 15% of heavy calcium carbonate powder, 0.1 to 2% of dispersible adhesive powder, 0.01 to 0.5% of a water-retaining agent, and 0.01 to 0.5% of fiber. The repair mortar is convenient for construction and polishing; the texture of the repair mortar is similar to that of f autoclaved aerated concrete after hardening; and indexes, such as intensity, accords with existing standard requirements.

Description

technical field [0001] The invention mainly relates to a special repair mortar for autoclaved aerated concrete, which is mainly used for repairing low-density autoclaved aerated concrete slabs, and belongs to the technical field of building materials and construction. Background technique [0002] Autoclaved aerated concrete slab is a lightweight, porous, new type of green and environmentally friendly building material that uses cement, lime, silica sand, etc. as the main raw materials, and then configures and adds different quantities of anti-corrosion treated steel mesh according to structural requirements. At present, with the continuous improvement of building energy-saving requirements at home and abroad, autoclaved aerated concrete panels have been widely used in building exterior walls, Interior partition walls and roofs, etc. [0003] However, due to its low strength, low-density autoclaved aerated concrete slabs are prone to missing edges, scratches, and surface de...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/16C04B111/72
CPCY02W30/91
Inventor 刘佳锐徐春利刘锶锜姚清华张友菊刘利娜
Owner TIANJIN TIANZHU BUILDING MATERIALS
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