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Preparation and using method of steam-curing alkali-activated cement

A technology of alkali-activated cement and steam curing, which is applied in the field of preparation of alkali-activated cement, and can solve the problems of high cost and no obvious advantages

Active Publication Date: 2019-11-15
湖南湘楚先路环保科技有限责任公司
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Problems solved by technology

But the Na in the cement 2 O+0.658K 2 The O content is 6-25%, which is not lower than that of the traditional two-component alkali-activated cement, and the alkali metals all come from expensive industrial alkali salts. Although the calcination temperature is low, the cost is still high without obvious The advantages

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  • Preparation and using method of steam-curing alkali-activated cement

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Embodiment Construction

[0013] The present invention will be further described in detail through specific examples below, but the present invention is not limited thereto.

[0014] Prepare soda ash, caustic soda, potassium and sodium aluminosilicate raw materials and limestone, of which there are 6 kinds of potassium and sodium aluminosilicate raw materials, all of which are natural rock mixtures. In the residue after calcination at 1100°C in air, SiO 2 +Al 2 o 3 +Na 2 O+K 2 The mass proportion of O+CaO+MgO is 96~98%, and the rest of the chemical composition is mainly Fe 2 o 3 with TiO 2 . SiO 2 +Al 2 o 3 +Na 2 O+K 2 O+CaO+MgO is calculated as 100%. The chemical composition of the six kinds of potassium aluminosilicate raw materials is shown in Table 1. The content of each component meets the requirements of CaO: 0~5.0%, MgO: 0~2.0%, SiO 2 : 50.0~75.0%, Al 2 o 3 : 15.0~35.0%, Na 2 O+K 2 O: 5.0~11.0%. Mix soda ash or caustic soda with potassium sodium aluminosilicate and limestone in ...

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Abstract

The invention discloses a preparation and using method of steam-curing alkali-activated cement. A small amount of industrial alkali and potassium sodium aluminosilicate and limestone are mixed and ground to be calcinated under the temperature of 1,250-1,300 DEG C and quenched to obtain a clinker, the clinker is ground into powder and evenly mixed into 3.0-12.0% of sodium silicate with the modulusbeing 1.0-3.2 to obtain cement, the cement is steamed and cured under the temperature of 50-80 DEG C for 8-24 h after being mixed with water to be uniform, and a high-intensity hardening body is obtained. The prepared cement has the advantages that hardening is rapid, the strength is high, raw materials are wide, the cost is low, consumption is low, low-carbon emission is achieved, and the performance is stable and easy to control, and the method is particularly suitable for preparing prefabricated parts.

Description

technical field [0001] The invention belongs to the field of cement building materials and applications thereof, in particular to a method for preparing and using alkali-activated cement. Background technique [0002] Since the British J. Asputin obtained the patent right of Portland cement in 1824, Portland cement with huge production capacity has made great contributions to the development of human civilization in the past 200 years. The preparation of raw materials still has outstanding problems such as carbon emissions, high energy and material consumption, serious dust and sulfur nitrogen oxide gas pollution, and poor corrosion resistance and durability of cement. Alkali-activated cement has outstanding advantages such as early strength, corrosion resistance and good freeze-thaw performance. It can use a large amount of solid waste, low-carbon, energy-saving and environmentally friendly. It is considered to be one of the new cement varieties most likely to replace Portl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/44C04B7/47C04B7/42
CPCC04B7/424C04B7/425C04B7/44C04B7/47
Inventor 彭美勋马洪超刘文伟肖秋国宋飞朱赞宇樊鑫锋李广周心怡矫心悦
Owner 湖南湘楚先路环保科技有限责任公司
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