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Application of strengthening materials for concrete protective layer, composite template cloth and strengthening of concrete protective layer

A technology of strengthening materials and composite formwork, which is applied in the processing of building materials, formwork/formwork components, layered products, etc., can solve the problem of limited strengthening effect of concrete protective layer, reduction of water-cement ratio of surface concrete, no chemical reinforcement, etc. problems, to achieve the effect of improving mechanical properties and durability, shortening the maintenance period, and improving the strengthening effect

Active Publication Date: 2021-09-28
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned first method only uses the water-permeable and air-permeable physical properties of the formwork cloth to reduce the water-cement ratio of the surface concrete without any chemical reinforcement; although the materials such as reinforcing aids used in the second method have chemical penetration enhancement effect, but because the structure of the concrete after initial setting is relatively dense, its penetration depth is often only 3-8mm, and the thickness of the protective layer is 2-6cm, so this method has a very limited effect on strengthening the concrete protective layer
In addition, the construction procedures of the above two methods are divided. First, the permeable formwork cloth is used during pouring, and then hardened and demoulded, and then brushed or sprayed with reinforcing agents or hardeners. The construction organization has brought a lot of inconvenience

Method used

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  • Application of strengthening materials for concrete protective layer, composite template cloth and strengthening of concrete protective layer
  • Application of strengthening materials for concrete protective layer, composite template cloth and strengthening of concrete protective layer
  • Application of strengthening materials for concrete protective layer, composite template cloth and strengthening of concrete protective layer

Examples

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Effect test

Embodiment 1

[0069] Water-permeable and breathable non-woven fabrics and water-repellent non-woven fabrics produced by Jusheng Company are used to make the surface layer and base layer respectively. The thickness of the water-permeable and breathable non-woven fabrics is 0.9mm, the pore size is 30μm, and the pore thickness of the water-repellent non-woven fabrics is 0.1mm. The pore size is 10μm; the middle layer of deformable material is produced by Yuanyuan Company with a density of 22kg / m 3 The K324 sponge package is finally compounded and becomes the composite template cloth of the present invention.

[0070] A proportion of the concrete protection layer strengthening material (strengthening slurry) according to the present invention is made up of the following substances by mass percentage: silica sol: 45%, nano-silicon dioxide: 10%, magnesium fluorosilicate: 13%, go Ionized water: 32%, and mixed uniformly by a magnetic stirrer in a water bath environment at 22±2°C, and the dosage is 5...

Embodiment 2

[0072] Water-permeable and breathable non-woven fabrics and water-repellent non-woven fabrics produced by Jusheng Company are used to make the surface layer and base layer respectively. The thickness of the water-permeable and breathable non-woven fabrics is 0.9mm, the pore size is 30μm, and the pore thickness of the water-repellent non-woven fabrics is 0.1mm. The pore size is 10μm; the middle layer of deformable material is produced by Yuanyuan Company with a density of 22kg / m 3 The K324 sponge package is finally compounded and becomes the composite template cloth of the present invention.

[0073] A proportioning of the concrete protective layer strengthening material (slurry) of the present invention is made up of following material by mass percentage: Silica sol: 50%, nano silicon dioxide: 12%, magnesium fluorosilicate: 15%, deionized Water: 23%, mixed uniformly by a magnetic stirrer in a water bath environment at 22±2°C, and the dosage is 5% of the cement mass.

Embodiment 3

[0075] Adopt the composite template cloth structure of the present invention, coordinate existing conventional strengthening agent, specifically:

[0076] Water-permeable and breathable non-woven fabrics and water-repellent non-woven fabrics produced by Jusheng Company are used to make the surface layer and base layer respectively. The thickness of the water-permeable and breathable non-woven fabrics is 0.9mm, the pore size is 30μm, and the pore thickness of the water-repellent non-woven fabrics is 0.1mm. The pore size is 10μm; the middle layer of deformable material is produced by Yuanyuan Company with a density of 22kg / m 3 The K324 sponge package is finally compounded and becomes the composite template cloth of the present invention.

[0077] Use commercially available Anhui Tairun concrete surface enhancer TR-HNTBMZQ, dosage 0.8kg / m 2 .

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Abstract

The invention belongs to the technical field of building materials, and in particular relates to a concrete protective layer reinforcement material, which includes silica sol, nano silicon dioxide and magnesium fluorosilicate. In addition, the present invention also provides a composite template cloth containing reinforced materials, which includes a surface layer, an intermediate layer containing reinforced materials, and a base layer; the intermediate layer is a stretchable deformable material layer, and contains concrete Reinforcement material. Compared with the prior art, the present invention has an excellent effect of moisturizing and strengthening the protective layer, makes the concrete surface more smooth, smooth and dense, effectively enhances the mechanical properties of the protective layer concrete through physical and chemical methods, and improves the durability of the reinforced concrete structure at the same time , and effectively reduce the construction process, shorten the construction period, easy to use, suitable for large-scale promotion to related construction fields.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for strengthening a concrete protective layer. Background technique [0002] The durability of reinforced concrete structures is a complex issue involving many aspects such as materials, structures, construction and environment. According to the provisions of my country's "General Rules for Civil Building Design", the durability of general buildings is 50 to 100 years, but in fact The average service life of general buildings in my country is only about 30 years, compared with 132 years in the UK and 74 years in the United States. my country consumes more than 40% of the world's cement and steel every year, but the average service life of buildings is only 30 years, which not only causes a great waste of building materials, but also directly increases the carbon emissions of the construction industry, exacerbating the waste of resources and environmental pollut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/24B32B27/40B32B27/12B32B5/18B32B5/02B32B33/00E04G21/02E04G9/10
CPCB32B5/245B32B33/00B32B2266/0278C04B28/24E04G9/10E04G21/02C04B22/002C04B14/062C04B22/126
Inventor 龙广成肖其远谢友均曾晓辉上官明辉马昆林
Owner CENT SOUTH UNIV
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