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Cement kiln tail gas carbonization non-autoclaved aerated concrete wall material product and preparation method thereof

An air-entrained concrete, autoclaved-free technology, applied in the field of building wall materials, can solve the problems of limited practical application, decreased carbonization process, difficult diffusion, etc., and achieves the effects of ensuring mechanical properties, promoting carbonization, and reducing harmful pores.

Active Publication Date: 2022-01-21
HUAXIN CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preform body formed by high-pressure pressing is compact and has extremely low porosity, so it is difficult for CO2 to diffuse into the body, resulting in a significant decline in the carbonization process, and the carbonized active cement cannot be fully utilized to absorb CO 2 abilities
In addition, the maintenance requirements of high-purity CO2 limit its practical application to some extent

Method used

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  • Cement kiln tail gas carbonization non-autoclaved aerated concrete wall material product and preparation method thereof
  • Cement kiln tail gas carbonization non-autoclaved aerated concrete wall material product and preparation method thereof
  • Cement kiln tail gas carbonization non-autoclaved aerated concrete wall material product and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A cement kiln tail gas carbonization non-autoclaved aerated concrete wall material product, which consists of the following parts by mass: 50 parts of carbonized active cement, 5 parts of reinforcing material, 10 parts of lime, 10 parts of Portland cement, concrete aggregate tailings powder 25 parts, 1.2 parts of water reducing agent, 50 parts of water, 0.1 part of foaming agent, 0.02 parts of foam stabilizer; the carbonized active cement used is composed of 10.3% α-CS and 21.1% C 3 S 2 , 48.9% of γ-C 2 S, the rest is composed of calcium aluminosilicate and iron phase solid solution, Blaine specific surface area is 400m 2 / kg.

[0033] The preparation of the above-mentioned cement kiln tail gas carbonization-free autoclaved aerated concrete wall material product comprises the following steps:

[0034] (1) Mixing and stirring: First add carbonized active cement, reinforcing material, lime, Portland cement, concrete aggregate tailings powder, water, and water reducing ...

Embodiment 2

[0042]A cement kiln tail gas carbonization non-autoclaved aerated concrete wall material product, which consists of the following parts by mass: 32 parts of carbonized active cement, 2 parts of reinforcing material, 5 parts of lime, 5 parts of Portland cement, and concrete aggregate tailings powder 56 parts, 40 parts of water; 2.0 parts of water reducer, 0.13 parts of foaming agent, 0.03 parts of foam stabilizer; the carbonized active cement used is composed of 23.2% α-CS and 38.6% C 3 S 2 , 14.3% of γ-C 2 S, the rest is composed of calcium aluminosilicate and iron phase solid solution, Blaine specific surface area is 420m 2 / kg.

[0043] The preparation of the above-mentioned cement kiln tail gas carbonization-free autoclaved aerated concrete wall material product comprises the following steps:

[0044] (1) Mixing and stirring: First add carbonized active cement, reinforcing material, lime, Portland cement, concrete aggregate tailings powder, water, and water reducing agen...

Embodiment 3

[0052] A cement kiln tail gas carbonization non-autoclaved aerated concrete wall material product, which consists of the following parts by mass: 40 parts of carbonized active cement, 3 parts of reinforcing material, 9 parts of lime, 8 parts of Portland cement, and concrete aggregate tailings powder 40 parts, 35 parts of water, 1.6 parts of water reducer, 0.16 parts of foaming agent, 0.05 parts of foam stabilizer; the carbonized active cement used is composed of 45.8% α-CS and 27.4% C 3 S 2 , 5.5% γ-C 2 S, the rest is composed of f-CaO, calcium aluminosilicate, iron phase solid solution, Blaine specific surface area is 450m 2 / kg.

[0053] The preparation of the above-mentioned cement kiln tail gas carbonization-free autoclaved aerated concrete wall material product comprises the following steps:

[0054] (1) Mixing and stirring: First add carbonized active cement, reinforcing material, lime, Portland cement, concrete aggregate tailings powder, water, and water reducing age...

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Abstract

The invention relates to a cement kiln tail gas carbonized non-autoclaved aerated concrete wall material product and a preparation method thereof. The concrete wall material product comprises the following components: 30-50 parts of carbonized active cement, 1-5 parts of a reinforcing material, 5-10 parts of lime, 5-10 parts of Portland cement, 20-60 parts of concrete aggregate tailing powder, 30-50 parts of water, 0.2-2 parts of a water reducing agent, 0.1-2 parts of a foaming agent and 0.02-0.5 part of a foam stabilizer. The preparation method comprises the following steps: uniformly stirring the components or directly adding the components into slurry and uniformly stirring; molding the stirred slurry, demolding, and curing at 50-60 DEG C for 4-8 hours; and feeding the mixture into a carbonization curing kettle filled with cement kiln tail gas, curing for 8-24 hours under the conditions that the temperature is 10-50 DEG C, the relative humidity is 50-100%, the CO2 volume concentration is 15-30% and the pressure is 2-4 atmospheric pressure, and then curing for 3-14 days under the natural conditions that the temperature is 10-30 DEG C and the relative humidity is 50-90%. The non-autoclaved aerated concrete carbonized through the cement kiln tail gas absorbs a large amount of CO2, does not need autoclaved curing, is fast in strength development and low in water absorption rate, and has good heat preservation, heat insulation, sound insulation and fireproof performance.

Description

technical field [0001] The invention relates to the field of building wall materials, in particular to a cement kiln tail gas carbonization-free autoclaved aerated concrete wall material product and a preparation method thereof. Background technique [0002] Air-entrained concrete has been widely used in engineering because of its light weight, heat insulation, sound insulation, good fire resistance, and easy processing and use. However, its production adopts autoclave curing to accelerate the hydrothermal synthesis of gelling materials to obtain the expected mechanical properties, which has problems such as high energy consumption, high water absorption rate, and insufficient durability. [0003] Compared with hydration hardening, silicate accelerated carbon hardening has been developed rapidly in recent years because it can obtain excellent mechanical properties and durability in a short period of time. And with the portland minerals in ordinary Portland cement (C 3 S, β...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10C04B28/04C04B40/02C04B111/28C04B111/40
CPCC04B28/04C04B40/0231C04B2111/40C04B2111/28C04B2201/20C04B2201/32C04B2201/50C04B22/00C04B22/08C04B22/064C04B18/12C04B2103/302C04B2103/48C04B2103/42C04B38/10C04B38/0067Y02W30/91
Inventor 李叶青田建平余松柏蔡肖汪宣乾
Owner HUAXIN CEMENT
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