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Improved aerated concrete block

An air-entrained concrete and block technology, applied in the field of concrete, can solve the problems of low strength and easy to break, low elastic modulus, unsuitable for use, etc., and achieve the effects of reducing water absorption, improving elastic modulus and improving reactivity

Pending Publication Date: 2021-04-13
HUBEI SHENZHOU BUILDING MATERIAL
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AI Technical Summary

Problems solved by technology

[0005] However, air-entrained concrete also has significant defects, such as low strength, easy cracking, large shrinkage, low elastic modulus, fear of freezing damage, and not suitable for use in humid environments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] Preparation of modified carbon nanotube materials:

[0027] 1) Put the carbon nanotube powder in an airtight container and feed nitrogen gas, adjust the nitrogen flow rate and air pressure, and at the same time perform microwave irradiation, so that the gas inside the cavity absorbs microwave energy and excites plasma; wherein, the microwave power is 100-110W, The nitrogen flow rate is 20-25sccm, the working pressure is 1kPa-3kPa, and the microwave irradiation time is 60-90min;

[0028] 2) Increase the ultrasonic irradiation of 28-40kHz, and the nitrogen atoms after plasmaization are deeply mixed into the surface and internal structure of carbon nanotubes, and the irradiation time is 10-20min;

[0029] 3) Add 0.01-0.05 g / mL chitosan acetic acid solution to the obtained carbon nanotubes, react at 30-35° C. for 6-8 hours, suction filter, wash, and dry to obtain modified carbon nanotube materials.

Embodiment 1

[0031] 125 parts of river sand, 30 parts of cement, 30 parts of quicklime, 10 parts of desulfurized gypsum, 0.2 part of aluminum powder and 0.3 part of modified carbon nanotube; the aerated concrete block is prepared according to the traditional process.

Embodiment 2

[0036] 150 parts of silica sand, 22 parts of cement, 20 parts of quicklime, 15 parts of desulfurized gypsum, 0.25 parts of aluminum powder and 0.5 parts of modified carbon nanotubes; the air-entrained concrete block is prepared according to the traditional process.

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Abstract

The invention discloses an improved aerated concrete block, which is prepared from the following raw materials in parts by weight: 100 to 150 parts of siliceous material, 22 to 45 parts of cement, 20 to 40 parts of quick lime, 5 to 15 parts of desulfurized gypsum, 0.2 to 0.25 part of aluminum powder and 0.2 to 0.5 part of modified carbon nanotube. The modified carbon nanotube is prepared by the following steps: putting carbon nanotube powder into a closed container, introducing nitrogen, adjusting the flow and air pressure of the nitrogen, and carrying out microwave irradiation at the same time, so that gas in a cavity absorbs microwave energy and is excited to generate plasma; adding ultrasonic irradiation to make the ionized nitrogen atoms deeply doped into the surface and the internal structure of the carbon nanotube; and adding the obtained carbon nanotube into an acetic acid solution of chitosan, reacting for 6-8 hours at the temperature of 30-35 DEG C, and performing suction filtration, washing and drying to obtain the modified carbon nanotube material.

Description

technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to an aerated concrete block. Background technique [0002] Air-entrained concrete is a new type of wall building material. It is unique in that it is a very lightweight new type of building wall material for thermal insulation. The air-entrained concrete technology started a hundred years ago, and my country's technology started relatively late, 40 years behind foreign countries. However, the development of my country's air-entrained concrete industry is indeed very rapid. The technical level of domestic air-entrained concrete has reached the international advanced level. [0003] The biggest advantage of aerated concrete is that it saves land resources and does not need to waste a lot of arable land, and its raw materials come from a wide range of sources, such as ash, slag, fly ash and coal gangue, etc. are all raw materials for aerated concrete. Moreover, the perf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/04C04B111/40
CPCC04B28/04C04B2111/40C04B14/06C04B18/064C04B22/04C04B22/064C04B14/026C04B38/02
Inventor 罗克佐
Owner HUBEI SHENZHOU BUILDING MATERIAL
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