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Preparation method of cheap single-component alkali-activated cement and application method thereof

An alkali-activated cement, single-component technology, applied in the field of new cement materials, can solve the problems of stimulating cement preparation cost competition, etc., and achieve the effect of abundant raw materials, easy access to raw materials, and good early strength

Active Publication Date: 2013-10-02
HUNAN UNIV OF SCI & TECH
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Problems solved by technology

[0006] But the above-mentioned patents all utilize expensive industrial alkali (caustic soda or soda ash) to provide Na 2 O component, which makes the preparation cost of the new one-component alkali-activated cement still unable to compete with Portland cement

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  • Preparation method of cheap single-component alkali-activated cement and application method thereof
  • Preparation method of cheap single-component alkali-activated cement and application method thereof

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with specific experimental examples. The equipment used in the embodiments of the present invention is conventional equipment, and the raw materials used are conventional raw materials.

[0024] In the embodiment of the present invention, three kinds of silicon-aluminum raw materials have been prepared, all of which are clays that are easy to grind; the calcium raw materials used have dolomite powder and analytically pure calcium carbonate powder; the cheap alkali metal salts used are Na 2 SO 4 More than 99.9% sodium sulfate; the carbonaceous raw material used is anthracite. The chemical compositions of the raw materials are shown in Table 1. Industrial analysis of anthracite shows that it contains 3.8% moisture, 62.0% fixed carbon, 20.2% ash, and 10.3% volatile matter.

[0025] Table 1 Chemical composition of relevant raw materials Unit: wt%

[0026]

[0027] After drying, each raw ma...

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Abstract

The invention discloses a preparation method of cheap single-component alkali-activated cement and an application method thereof. The preparation method comprises the following steps: respectively grinding salic raw material, calcareous raw material, cheap salt containing alkali metal and carbonaceous raw material; then mixing according to a certain sequence and proportion so as to generate a raw material; quickly heating the raw material powder till a preset maximum temperature; after preserving the temperature for 0.5-3.0 hours, quickly cooling till a normal temperature to obtain clinker; grinding the clinker till the fineness of cement so as to obtain cement; adding water into the cement to be mixed into slurry, wherein the water is added till the slurry of water and cement can be compacted through vibration in a mold; after the slurry added in the mold is compacted through vibration, moisturizing and curing for 1-3 days at the temperature of 50-80 DEG C so as to obtain required strength; and doping other aggregates and inert fillers in the cement slurry according to the requirement. The raw materials of the cheap single-component alkali-activated cement are rich, easily obtained and low in cost; and the whole preparation process is low-carbon and low in energy consumption, and the obtained product has good early strength so as to establish a new way for cement material.

Description

technical field [0001] The invention belongs to the field of new cement materials, and in particular relates to the preparation and application method of cheap single-component alkali-activated cement. Background technique [0002] In 2011, my country's cement output reached 2.063 billion tons, most of which were Portland cement. The calcination temperature of Portland cement reaches 1450°C, high energy and material consumption, high carbon emissions, serious environmental pollution, poor acid resistance, corrosion resistance and durability, and consumes a large amount of high-quality limestone resources, so its use should be gradually restricted and reduced. The alkali-activated cement that has been studied more recently is a two-component cement composed of an aqueous solution of a strong alkali salt and an active solid oxide powder, in which the typical component is Na 2 O-Ca(Mg)O-Al 2 o 3 -SiO 2 Alkali slag cement is the most cost-effective. The application practice...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/42C04B7/32
Inventor 彭美勋王正红叶真男汪可邹高增申少华肖秋国张欣
Owner HUNAN UNIV OF SCI & TECH
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