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Preparation method of self-insulating lightweight concrete wall

A lightweight concrete and self-insulation technology, applied in the field of concrete walls and its preparation, can solve problems such as damage, bulkiness, and micro-cracks

Inactive Publication Date: 2018-09-21
芜湖恒固混凝土材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the most common concrete wall used in industrial and civil buildings, although the strength (generally 20-30MPa) can basically meet the requirements of the building structure, but relatively heavy
However, the existing concrete walls and aerated concrete walls are brittle materials, which are easy to produce micro-cracks due to shrinkage, or even completely destroyed, which cannot meet the requirements of building structures, and can only be used as non-load-bearing partition walls or insulation materials

Method used

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  • Preparation method of self-insulating lightweight concrete wall

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preparation example Construction

[0022] The present invention also provides a method for preparing the self-insulating lightweight concrete wall, comprising the following steps:

[0023] (1) After the first polymer powder and the second foaming agent are mixed uniformly, they are spun to obtain polymer fibers; then polymer fibers, chain extenders, graphene oxide and carbonate are placed in the second polymer In the powder, react at 60-100°C for 15-60 minutes, and finally calcinate at 150-180°C for 30-50 minutes to obtain composite porous fibers;

[0024] (2) Mix fly ash, cement, fine sand, diatomaceous earth, light aggregate, composite porous fiber and waste rubber under mechanical stirring conditions to obtain a powder mixture;

[0025] (3) After uniformly dispersing the water reducer and other additives in water, add them to the above powder mixture, and continue to stir for 60-150s to obtain a mixed slurry; finally, add the first foaming agent to the mixed slurry, and stir evenly to obtain Concrete precur...

Embodiment 1

[0033] (1) Spin after mixing 24kg polyethylene terephthalate powder and 6kg 4,4-oxobisbenzenesulfonyl hydrazide evenly to obtain polyethylene terephthalate fibers, and the spinning process is: The power supply voltage is 30KV, the spinning environment conditions are temperature 25°C, relative humidity 60%; the needle spacing of the multi-needle spinning unit is 15cm, and the number of spinning unit needles is 45; take 22kg polyethylene terephthalate fiber, 20kg ethyl Diol, 12kg of graphene oxide and 3kg of sodium carbonate are placed in 12kg of polyethylene terephthalate powder and reacted at 80°C for 45min to obtain polymer fibers, which are then calcined at 160°C for 40min to obtain Composite porous fibers;

[0034]Soak 4kg of waste rubber granules in an acidic solution with a pH of 6-6.5 for 4 hours to obtain acidified rubber, mix the acidified rubber and 10kg of maleic anhydride in water evenly, and stir and react at 100°C for 1 hour to obtain modified rubber;

[0035] (2...

Embodiment 2

[0039] (1) A, 20kg nylon 6 powder and 2kg 4,4-oxobisbenzenesulfonyl hydrazide are mixed and spun to obtain nylon 6 fiber. The spinning process is: power supply voltage 30KV, and the spinning environment condition is temperature 25°C, relative humidity 60%; multi-needle spinneret needle spacing 15cm, spinneret number 45; take 18kg nylon 6 fiber, 24kg 1,3-butanediol, 10kg graphene oxide and 2kg potassium carbonate In 10kg of nylon 6 powder, react at 80°C for 30 minutes to obtain polymer fibers, and then calcinate the polymer fibers at 150°C for 50 minutes to obtain composite porous fibers;

[0040] Soak 3kg of waste rubber particles in an acidic solution with a pH of 6-6.5 for 3 hours to obtain acidified rubber, mix the acidified rubber and 9kg of maleic anhydride in water evenly, and stir and react at 120°C for 1 hour to obtain modified rubber;

[0041] (2) 25kg of fly ash, 35kg of cement, 15kg of fine sand, 12kg of diatomaceous earth, 5kg of polyethylene foam (1-5mm), 10kg of ...

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Abstract

The invention relates to the technical field of concrete and preparation of the concrete, in particular to a preparation method of a self-insulating lightweight concrete wall. The preparation method of the self-insulating lightweight concrete wall comprises the following steps: (1) spinning after uniformly mixing first polymer powder and a second foaming agent to obtain polymer fibers; then placing the polymer fibers, a chain extender, graphene oxide and carbonate in second polymer powder to react, and then calcining at high temperature to obtain composite porous fibers; (2) adding a first foaming agent after uniformly dispersing fly ash, cement, fine sand, diatomite, lightweight aggregate, the composite porous fibers, waste rubber, a water reducer and other auxiliary agents in water, anduniformly stirring to obtain a concrete precursor; reversely molding and curing the concrete precursor to obtain the concrete wall. The concrete wall prepared with the method has the characteristics of light weight, high strength and good weather resistance, and can meet performance index requirements of the construction industry for the concrete wall.

Description

technical field [0001] The invention relates to the technical field of concrete walls and their preparation, in particular to a method for preparing self-insulating lightweight concrete walls. Background technique [0002] Building energy conservation is a very important aspect of realizing a low-carbon economy. my country will continue to vigorously implement building energy conservation and emission reduction for a long period of time, develop green buildings and circular economy, and green building materials will become the main direction of development. Foam concrete has a variety of excellent properties, such as good lightness, good non-combustibility, good thermal insulation performance, good environmental protection performance, good earthquake resistance, and the characteristics of adjustable indoor humidity just meet the requirements of green building materials. In addition, foam concrete can use a large amount of industrial waste, convenient production and constru...

Claims

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Application Information

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IPC IPC(8): C04B28/02C04B20/02C04B18/02C04B38/02C04B38/10
CPCC04B28/02C04B18/027C04B20/023C04B2201/20C04B2201/32C04B2201/50C04B18/08C04B14/06C04B14/08C04B14/28C04B14/16C04B18/22C04B16/082C04B16/0683C04B2103/302C04B24/20C04B24/085C04B24/383C04B22/0093C04B24/10C04B22/068C04B38/02C04B18/24C04B16/0691C04B16/0616C04B18/023C04B14/10
Inventor 承忠富
Owner 芜湖恒固混凝土材料有限公司
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