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Lightweight composite concrete external wall and production method

A concrete and lightweight technology, which is applied in the field preparation and application of building components, household appliances, etc., can solve the problem of small specific surface area of ​​coarse aggregate, poor use effect of foamed concrete external walls, and aggregate bonding on the external surface of concrete Low strength and other problems, to achieve the effect of excellent compressive and flexural properties and low density

Active Publication Date: 2018-12-11
浙江高盛钢结构有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the coarse aggregate is directly used, a large number of bubbles generated by the foaming agent will be adsorbed on the surface of the aggregate, resulting in low bonding strength of the aggregate on the outer surface of the concrete and easy to fall off. At the same time, the specific surface area of ​​the coarse aggregate is small. The formed closed pores will accumulate free water, promote the alkali-aggregate reaction, and cause the concrete to expand and crack, resulting in poor practical use of the foamed concrete exterior wall

Method used

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  • Lightweight composite concrete external wall and production method
  • Lightweight composite concrete external wall and production method
  • Lightweight composite concrete external wall and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] as attached figure 1 As shown, a lightweight composite concrete exterior wall includes a cage-shaped steel bar support 2, an embedded part 3 fixed in the steel bar support 2, and a concrete matrix formed by filling and covering the steel bar support 2 with lightweight composite concrete 1 and the coating layer 6 coated on the side of the concrete substrate 1 facing away from the interior or facing away from the wall surface 5 on which it is installed. One end of the embedded part 3 passes through the concrete matrix 1 and is fixed with the wall or the fixing bracket 4 of the outer wall. The coating layer 6 is an insulation layer, an anti-corrosion paint layer or a decorative paint layer, which is not an innovation point of the present invention, and has no effect on the mechanical properties of the concrete matrix 1 alone, so it will not be described in detail here.

[0053] Lightweight composite concrete includes the following raw materials and the mass parts of raw m...

Embodiment 2

[0085] A lightweight composite concrete exterior wall, based on Example 1, the lightweight composite concrete also includes 5-6 parts of short glass fibers and 7-10 parts of silane crosslinking agent. The short glass fibers are commercially available product No. JSWX021 purchased from Jushi Group, and the length is 2-3 cm. The silane crosslinking agent is vinyltrimethoxysilane, which is a commercial product RJ-171 of Hangzhou Ruijiang New Material Technology Co., Ltd. Through the production method of a lightweight composite concrete exterior wall in Example 1, in some steps of configuring the lightweight composite concrete, short glass fibers, silane crosslinking agents and Portland cement are added together to finally obtain lightweight composite concrete. The specific ingredients are as follows.

[0086]

[0087] The lightweight composite concrete obtained in Examples 2A-2F was subjected to compression test, flexural test and impermeability test, and the test results wer...

Embodiment 3

[0097] A lightweight composite concrete exterior wall, based on Example 1, the difference lies in the shape of the polytetrafluoroethylene filler 8. as attached image 3 As shown, the polytetrafluoroethylene packing 8 is a circular piece, and a conical portion 81 coaxial with it is provided on one side of the circular shape. The thickness of the center of the conical portion 81 is greater than the thickness of the edge. The bottom surface inside the exterior wall mold 7 is set horizontally and corresponds to the side of the concrete matrix 1 facing away from the room or the house where it is installed, and the vibrating direction in S5 includes vibrating in the horizontal and vertical directions. Examples 3A-3F According to the ratio of raw materials in Examples 1A-1F, the corresponding lightweight composite concrete was obtained.

[0098] The anti-seepage test was carried out on the side of the lightweight composite concrete obtained in Examples 3A-3F facing away from the ro...

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Abstract

The invention relates to lightweight concrete external walls and discloses a lightweight composite concrete external wall and a production method. The lightweight composite concrete external wall comprises a steel bar bracket, an embedded part fixed in the steel bar bracket, a concrete matrix which is used for filling and cladding the steel bar bracket and a coating layer which is coated on the outer side of the concrete matrix; the lightweight composite concrete external wall is prepared from the following raw materials in parts by mass: 100 parts of portland cement, 100 parts of water, 80 parts of crushed stone aggregate, 8 to 12 parts of strongly acidic action exchange resin, 30 to 40 parts of natural sand and 7 to 10 parts of polytetrafluoroethylene filler. The production method comprises the following steps: pouring lightweight composite concrete obtained by mixing the raw materials into an external wall mold provided with the steel bar bracket and the embedded part; after the lightweight composite concrete is solidified and cured, obtaining the concrete matrix; coating the concrete matrix with a coating layer, so as to obtain the lightweight composite concrete external wall.The carrying load of an external wall fixing bracket is reduced, and the compression resistance and bending strength of the lightweight composite concrete are improved; the possibility that the external wall is fractured or crushed when being impacted is reduced.

Description

technical field [0001] The invention relates to a lightweight concrete exterior wall, in particular to a lightweight composite concrete exterior wall and a production method. Background technique [0002] The building exterior wall is a common component in existing house construction. It uses metal pendants to directly hang the decorative building panels on the wall or hang them on the steel frame. There is an existing concrete exterior wall, which is composed of a concrete matrix composed of foamed concrete, equipped with embedded parts embedded in the concrete matrix and a decorative layer coated outside the concrete matrix. rack fixed. Among them, foamed concrete, also known as foamed concrete or lightweight concrete, is to fully foam the foaming agent mechanically through the foaming system of the foaming machine, and mix the foam and cement slurry evenly, and then pass through the pump of the foaming machine. It is a new type of lightweight thermal insulation material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B38/10E04B1/41E04G15/06C04B111/27C04B111/40
CPCC04B28/04C04B2111/27C04B2111/40C04B2201/50E04B1/41E04G15/063C04B14/02C04B14/06C04B24/2682C04B2103/0087C04B38/10C04B14/42
Inventor 李之强黎洪赵红运
Owner 浙江高盛钢结构有限公司
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